View MAX6754_160938.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-3075; Rev 1; 12/03
Low-Power, Single/Dual-Voltage Window Detectors
General Description
The MAX6754-MAX6764 low-power window detectors monitor undervoltage/overvoltage conditions on system power supplies. These devices assert when the monitored voltage is under the undervoltage and/or over the overvoltage thresholds. The MAX6754-MAX6759/MAX6763/MAX6764 monitor a single voltage. The MAX6760/MAX6761/MAX6762 monitor dual-voltage systems. The MAX6754/MAX6755/ MAX6756 provide a single undervoltage/overvoltage output and the MAX6757-MAX6764 provide independent undervoltage and overvoltage outputs. The outputs are available in push-pull or open-drain configurations. The MAX6754-MAX6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9V to 5V with a selectable 5%, 10%, or 15% window voltage. The MAX6763/MAX6764 allow for externally adjustable thresholds. The MAX6754-MAX6762 are available in two delay timing options (20s, typ or 100ms, min). The MAX6760/MAX6761/MAX6762 also include a latched overvoltage output function and the MAX6754-MAX6762 include a manual reset input. The family of products is available in small SOT23 and TDFN packages and is specified over the extended temperature range of -40C to +125C.
Features
Single- or Dual-Supply Voltage Monitors Factory-Trimmed Window Threshold Options for 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V, 1.2V, and 0.9V Supplies Externally Adjustable Window Monitoring Options for Supplies Down to 0.5V Selectable Window Threshold Options (5%, 10%, 15%) Single (Combined UV/OV) or Dual (Separate UV and OV) Outputs 20s (typ) or 100ms (min) Timeout Period Options (MAX6754-MAX6762) Manual Reset Input (MAX6754-MAX6762) Latched Overvoltage Output Function (MAX6760/MAX6761/MAX6762) Immune to Short Voltage Transients Low 10A Supply Current Low-Voltage Operation (Outputs Valid for VCC Down to 1V) -40C to +125C Operating Temperature Range Small SOT23 and TDFN Packages
MAX6754-MAX6764
Applications
Telecommunications Networking Computers/Servers Data Storage Power Metering DC-DC Converter Modules Automotive
Ordering Information
PART* MAX6754UK_D_-T MAX6755UK_D_-T MAX6756UK_D_-T MAX6757UT_D_-T MAX6758UT_D_-T TEMP RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C PIN-PACKAGE 5 SOT23-5 5 SOT23-5 5 SOT23-5 6 SOT23-6 6 SOT23-6
Typical Application Circuit
VCC P
MAX6757
VCC SET
GND
OV
NMI
*Note: Insert the threshold level suffixes for VCC and VCC2 (Tables 1 and 2) after UK, UT, or TA. For the MAX6754-MAX6759, insert only the VCC threshold suffix after the UK or UT. Insert the reset timeout delay (Table 3) after D to complete the part number. For example, the MAX6760TALTD3-T provides a VCC threshold of 5V, a VCC2 threshold of 3.3V, and a 100ms minimum reset timeout period. Sample stock is generally held on standard versions only (see the Standard Versions table). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability. Ordering Information continued at end of data sheet. Pin Configurations appear at end of data sheet.
MR
UV
RESET
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
ABSOLUTE MAXIMUM RATINGS
(Voltages with respect to GND) VCC, VCC2, ............................................................-0.3V to +6.5V SET, OVLATCH, MR, UVIN, OVIN ..............-0.3V to (VCC + 0.3V) UV, RESET, OV (open drain) .................................-0.3V to +6.5V RESET, OV, UV, UV, RESET (push-pull).....-0.3V to (VCC + 0.3V) Input/Output Current (all pins) ............................................20mA Continuous Power Dissipation (TA = +70C) 5-Pin SOT23-5 (derate 7.1mW/C above TA = +70C)....571mW 6-Pin SOT23-6 (derate 8.7mW/C above TA = +70C)....696mW 8-Pin TDFN (derate 24.4mW/C above TA = +70C).....1951mW Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760-MAX6762), TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER POWER REQUIREMENTS (Note 2) Operating Voltage Range VCC MAX6760TAAA/MAX6761TAAA/ MAX6762TAAA/MAX6763/MAX6764UT-T VCC = 3.6V, MAX6754-MAX6759, no load VCC Supply Current ICC VCC = 3.6V, MAX6763/MAX6764, no load VCC = 3.6V, VCC VCC2, MAX6760/MAX6761/MAX6762, no load VCC2 = 1.8V, VCC VCC2, MAX6760/MAX6761/MAX6762 VCC2 (MAX6760-MAX6762TA_AD_) (Note 3) VSET = VSB L, 5V SET = VCC SET = GND VSET = VSB T, 3.3V SET = VCC SET = GND VCC Overvoltage Threshold OVTH TA = -40C to +125C, rising VCC VSET = VSB R, 3.0V SET = VCC SET = GND VSET = VSB Z, 2.5V SET = VCC SET = GND VSET = VSB W, 1.8V SET = VCC SET = GND -20 1.0 1.4 13 10 13 1 6.0 6.0 30 23 30 1.5 +20 A nA A V SYMBOL CONDITIONS MIN TYP MAX UNITS
VCC2 Supply Current ICC2 Adjustable Bias Current VCC THRESHOLD
5.750 5.500 5.250 3.795 3.630 3.465 3.450 3.300 3.150 2.875 2.750 2.625 2.070 1.980 1.890
5.875 5.625 5.375 3.878 3.713 3.548 3.525 3.375 3.225 2.938 2.813 2.688 2.115 2.025 1.935
6.000 5.750 5.500 3.960 3.795 3.630 3.600 3.450 3.300 3.000 2.875 2.750 2.160 2.070 1.980 V
2
_______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760-MAX6762), TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER SYMBOL CONDITIONS VSET = VSB L, 5V SET = VCC SET = GND VSET = VSB T, 3.3V SET = VCC SET = GND VCC Undervoltage Threshold UVTH TA = -40C to +125C, falling VCC VSET = VSB R, 3.0V SET = VCC SET = GND VSET = VSB Z, 2.5V SET = VCC SET = GND VSET = VSB W, 1.8V SET = VCC SET = GND VSET = VSB T, 3.3V SET = VCC SET = GND VSET = VSB R, 3.0V SET = VCC SET = GND VSET = VSB Z, 2.5V SET = VCC SET = GND VSET = VSB W, 1.8V SET = VCC VCC2 Overvoltage Threshold OVTH2 TA = -40C to +125C, rising VCC2 I, 1.5V SET = GND VSET = VSB (Note 2) SET = VCC (Note 2) SET = GND (Note 2) VSET = VSB (Note 2) G, 1.2V SET = VCC (Note 2) SET = GND (Note 2) VSET = VSB (Note 2) E, 0.9V SET = VCC (Note 2) SET = GND (Note 2) VSET = VSB ADJ SET = VCC SET = GND MIN 4.000 4.250 4.500 2.640 2.805 2.970 2.400 2.550 2.700 2.000 2.125 2.250 1.440 1.530 1.620 3.795 3.630 3.465 3.450 3.300 3.150 2.875 2.750 2.625 2.070 1.980 1.890 1.725 1.650 1.575 1.380 1.320 1.260 1.035 0.990 0.945 0.489 0.468 0.447 TYP 4.125 4.375 4.625 2.723 2.888 3.053 2.475 2.625 2.775 2.063 2.188 2.313 1.485 1.575 1.665 3.878 3.713 3.548 3.525 3.375 3.225 2.938 2.813 2.688 2.115 2.025 1.935 1.763 1.688 1.613 1.410 1.350 1.290 1.058 1.013 0.968 0.500 0.479 0.457 MAX 4.250 4.500 4.750 2.805 2.970 3.135 2.550 2.700 2.850 2.125 2.250 2.375 1.530 1.620 1.710 3.960 3.795 3.630 3.600 3.450 3.300 3.000 2.875 2.750 2.160 2.070 1.980 1.800 1.725 1.650 1.440 1.380 1.320 1.080 1.035 0.990 0.511 0.489 0.468 V V UNITS
MAX6754-MAX6764
_______________________________________________________________________________________
3
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760-MAX6762), TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER SYMBOL CONDITIONS VSET = VSB T, 3.3V SET = VCC SET = GND VSET = VSB R, 3.0V SET = VCC SET = GND VSET = VSB Z, 2.5V SET = VCC SET = GND VSET = VSB W, 1.8V SET = VCC VCC2 Undervoltage Threshold UVTH2 TA = -40C to +125C, falling VCC2 I, 1.5V SET = GND VSET = VSB (Note 2) SET = VCC (Note 2) SET = GND (Note 2) VSET = VSB (Note 2) G, 1.2V SET = VCC (Note 2) SET = GND (Note 2) VSET = VSB (Note 2) E, 0.9V SET = VCC (Note 2) SET = GND (Note 2) VSET = VSB ADJ Threshold Hysteresis VHYST VCC, VCC2 SET = VCC SET = GND UNDERVOLTAGE/OVERVOLTAGE INPUTS (UVIN, OVIN) (MAX6763/MAX6764) UVIN, OVIN Threshold Voltage UVIN, OVIN Input Bias Current UVIN, OVIN Threshold Hysteresis VTH-IN IIN VHYST (Note 3) 0.485 -20 0.7 0.5 0.515 +20 V nA % MIN 2.640 2.805 2.970 2.400 2.550 2.700 2.000 2.125 2.250 1.440 1.530 1.620 1.200 1.275 1.350 0.960 1.020 1.080 0.720 0.765 0.810 0.340 0.362 0.383 TYP 2.723 2.888 3.053 2.475 2.625 2.775 2.063 2.188 2.313 1.485 1.575 1.665 1.238 1.313 1.388 0.990 1.050 1.110 0.743 0.788 0.833 0.351 0.372 0.394 0.7 MAX 2.805 2.970 3.135 2.550 2.700 2.850 2.125 2.250 2.375 1.530 1.620 1.710 1.275 1.350 1.425 1.020 1.080 1.140 0.765 0.810 0.855 0.362 0.383 0.404 % V UNITS
4
_______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760-MAX6762), TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER TIMING CHARACTERISTICS Reset and UV Timeout Period VCC to Reset Delay VCC to UV Delay tRP tD-RESET tD-UV Figure 7 D0 D3 100 20 185 20 20 320 s ms s s SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6754-MAX6764
VCC/VCC2 falling at 10mV/s from UVTH + 100mV to UVTH - 100mV VCC/VCC2 rising at 10mV/s from OVTH - 100mV to OVTH + 100mV VCC/VCC2 rising at 10mV/s from OVTH - 100mV to OVTH + 100mV (MAX6757-MAX6762 only) (MAX6763/MAX6764) (MAX6763/MAX6764)
VCC to OV Delay UVIN to UV Delay OVIN to OV Delay Startup Delay Time
tD-OV
20
s
20 20 2
s s ms
tSTART
D0 options only, OV output (Note 4)
THRESHOLD WINDOW SELECT INPUT (SET) Input Voltage Low VCC = 1.4V Input Bias Voltage (Note 5) Input Voltage High Input Current MANUAL RESET (MR) Input Voltage Low Input Voltage High Pullup Resistance to VCC Minimum Pulse Width Transient Immunity tD-MR Propagation Delay tMR_P MR falling, Figure 7 MR rising, Figure 7 D0 D3 100 4 300 300 40 185 320 0.3 x VCC 0.7 x VCC 0.6 x VCC 26 0.23 x VCC V V k s ns ns ms ISET VSB VCC = 3.0V VCC = 6.0V 0 0.65 0.81 1.10 VCC - 0.1 -1 0.1 0.75 2.19 4.90 VCC +1 V A V V
OVERVOLTAGE OUTPUT LATCH CONTROL INPUT (OVLATCH) Input Voltage Low Input Voltage High V V
_______________________________________________________________________________________
5
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760-MAX6762), TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Input Bias Current RESET, RESET, UV, UV, OV Any VCC 1.0V, ISINK = 100A, output asserted Any VCC 1.2V, ISINK = 200A, output asserted RESET, UV Output Low (Open Drain or Push-Pull) VOL Any VCC 1.71V, ISINK = 1.0mA, output asserted Any VCC 2.85V, ISINK = 2.0mA, output asserted Any VCC 4.75V, ISINK = 4.0mA, output asserted Any VCC 1.71V, ISOURCE = 0.8mA, output deasserted RESET, UV Output High (Push-Pull) VOH Any VCC 2.85V, ISOURCE = 2.0mA, output deasserted Any VCC 4.75V, ISOURCE = 4.0mA, output deasserted Any VCC 1.71V, ISINK = 1.0mA, output deasserted RESET, UV Output Low (Push-Pull) VOL Any VCC 2.85V, ISINK = 2.0mA, output deasserted Any VCC 4.75V, ISINK = 4.0mA, output deasserted Any VCC 1.0V, ISOURCE = 50A, output asserted Any VCC 1.2V, ISOURCE = 100A, output asserted RESET, UV Output High (Push-Pull) VOH Any VCC 1.71V, ISOURCE = 0.8mA, output asserted Any VCC 2.85V, ISOURCE = 2.0mA, output asserted Any VCC 4.75V, ISOURCE = 4.0mA, output asserted 0.8 x VCC 0.8 x VCC 0.8 x VCC 0.8 x VCC 0.8 x VCC V 0.8 x VCC 0.8 x VCC 0.8 x VCC 0.3 0.3 0.3 V V 0.3 0.3 0.3 0.3 0.3 V SYMBOL IOVLATCH CONDITIONS MIN -1 TYP MAX +1 UNITS A
6
_______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 1.0V to 6.0V, VCC2 = 0 to 6.0V (MAX6760-MAX6762), TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER SYMBOL CONDITIONS Any VCC 1.98V, ISINK = 1.4mA, output asserted OV Output Low (Open-Drain or Push-Pull) Any VCC 2.75V, ISINK = 2.0mA, output asserted VOL Any VCC 3.63V, ISINK = 3.0mA, output asserted Any VCC 5.5V, ISINK = 4.0mA, output asserted Any VCC 1.0V, ISOURCE = 50A, output deasserted Any VCC 1.2V, ISOURCE = 100A, output deasserted OV Output High (Push-Pull) Any VCC 1.98V, ISOURCE = 1.4mA, output deasserted VOH Any VCC 2.75V, ISOURCE = 2.0mA, output deasserted Any VCC 3.63V, ISOURCE = 3.0mA, output deasserted Any VCC 5.5V, ISOURCE = 4.5mA, output deasserted RESET, UV, OV Output OpenDrain Leakage Current ILKG Output not asserted 0.8 x VCC 0.8 x VCC 0.8 x VCC 0.8 x VCC 0.8 x VCC 0.8 x VCC 1 A MIN TYP MAX 0.3 0.3 V 0.3 0.3 UNITS
MAX6754-MAX6764
V
Note 1: Note 2: Note 3: Note 4: Note 5:
Devices are production tested at +25C. Overtemperature limits are guaranteed by design. Voltage monitoring requires that VCC must be greater than or equal to 1.4V, but outputs remain asserted in the correct state for VCC down to 1.0V. Guaranteed by design. For D0 window detector options and OV outputs, startup delay time is the time required for the internal reference/circuitry to reach specified accuracy after the monitor is powered up from GND. The input bias voltage is based off of VCC. The minimum value is given by the equation (0.1 x VCC + 0.51)V and the maximum value is given by (0.9 x VCC - 0.51)V.
_______________________________________________________________________________________
7
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
Typical Operating Characteristics
(VCC = 5V, VCC2 = 3.3V, TA = +25C, unless otherwise noted.)
OVERVOLTAGE THRESHOLD vs. TEMPERATURE
NORMALIZED UNDERVOLTAGE THRESHOLD (V) NORMALIZED OVERVOLTAGE THRESHOLD (V)
MAX6754 toc01
UNDERVOLTAGE THRESHOLD vs. TEMPERATURE
MAX6754 toc02
TRANSIENT IMMUNITY vs. THRESHOLD OVERDRIVE
MAX6754 toc03
1.03 1.02 1.01 OVERVOLTAGE THRESHOLD RISING 1.00 0.99 0.98 0.97 OVERVOLTAGE THRESHOLD FALLING
1.03 1.02 1.01 1.00 UNDERVOLTAGE THRESHOLD FALLING 0.99 0.98 0.97 UNDERVOLTAGE THRESHOLD RISING
1000
TRANSIENT IMMUNITY (s)
OUTPUT ASSERTS ABOVE THIS LINE 100
NORMALIZED TO RISING THRESHOLD AT TA = +25C -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C)
NORMALIZED TO FALLING THRESHOLD AT TA = +25C 10 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C) 1 10 100 1000 OVERDRIVE (mV)
D3 TIMEOUT PERIOD vs. TEMPERATURE
MAX6754 toc04
SUPPLY CURRENT vs. SUPPLY VOLTAGE
TA = +125C TA = +85C TA = +25C TA = -40C
MAX6754 toc05
194 192 TIMEOUT PERIOD (ms) 190
20 18 16 ICC (A) 14 12 10 8 6
188 186 184 182 180 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C)
1
2
3 VCC (V)
4
5
6
OUTPUT VOLTAGE LOW vs. SINK CURRENT
MAX6754 toc06
OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT
-0.2 -0.4 VOH - VCC (V) -0.6 -0.8 -1.0 -1.2 -1.4 -1.6 VCC = 1.8V VCC = 3.3V VCC = 2.5V 0 5 10 ISOURCE (mA) 15 20 VCC = 5.0V
MAX6754 toc07
1.8 1.6 1.4 1.2 VOL (V) 1.0 0.8 0.6 0.4 0.2 0 0 5 10 ISINK (mA) 15 VCC = 5.0V VCC = 3.3V VCC = 2.5V VCC = 1.8V
0
20
-1.8
8
_______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors
Pin Description
PIN MAX6754/ MAX6757/ MAX6760/ MAX6763/ MAX6755/ MAX6758/ MAX6761/ MAX6764 MAX6756 MAX6759 MAX6762 1 -- 2 1 -- 2 1 -- 2 - 1 2 GND NAME FUNCTION
MAX6754-MAX6764
VCC
Power Voltage Input. VCC powers the device. VCC is the monitored voltage. Power Input. VCC powers the device. Ground Active-Low Manual Reset Input. Drive MR low to assert undervoltage and reset outputs. The asserted output remains asserted for the specified propagation delay period after MR goes high. MR is internally pulled up to VCC through a 26k resistor. Reset Output. The Reset Output asserts when VCC is below the selected UVTH threshold or above the selected OVTH threshold. Reset output deasserts after the specified timeout period after VCC rises above the UVTH threshold or drops below the OVTH threshold. MAX6754: Active-low push-pull output (RESET). MAX6755: Active-high push-pull output (RESET). MAX6756: Active-low open-drain output (RESET). Threshold Window Select Input. SET configures the undervoltage and overvoltage window range for the internal detectors. Connect SET to GND for 5% window, or to VCC for 10% window. Bias SET to VCC/2 for a 15% window. Undervoltage Output. UV/UV asserts when the monitored supply/supplies are below the UVTH thresholds or MR is low. UV/UV deasserts after the specified timeout period when the monitored supply/supplies rise above the UVTH thresholds or for the specified propagation delay after MR goes high. MAX6757/MAX6760: Active-low push-pull output (UV). MAX6758/MAX6761: Active-high push-pull output (UV). MAX6759/MAX6762: Active-low open-drain output (UV). VCC2 Voltage Input. Input for the second window voltage monitor, and device output power supply when VCC2 > VCC. Active-Low Overvoltage Output. OV asserts low when the monitored supply/supplies are above their overvoltage threshold (OVTH). OV goes high impedance immediately when the monitored supply/supplies drop below OVTH. There is no timeout delay period for the OV output. For MAX6763/MAX6764, OV is low when OVIN is above the internal 0.5V threshold. OV is high when OVIN is below the internal 0.5V threshold. MAX6757-MAX6762: Active-low open-drain output. MAX6763: Active-low push-pull output. MAX6764: Active-low open-drain output.
3
3
8
--
MR
4
--
--
--
RESET/ RESET
5
6
4
--
SET
--
4
6
--
UV/ UV
--
--
3
--
VCC2
5
5
5
OV
_______________________________________________________________________________________
9
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
Pin Description (continued)
PIN MAX6754/ MAX6757/ MAX6760/ MAX6763/ MAX6755/ MAX6758/ MAX6761/ MAX6764 MAX6756 MAX6759 MAX6762 NAME FUNCTION
7
--
Overvoltage Output Latch Control Input. Drive OVLATCH high to latch the overvoltage output for any VCC or VCC2 overvoltage condition. Drive OVLATCH low to clear the latch after overvoltage conditions have been OVLATCH removed. The latch is transparent when OVLATCH is connected to GND. OVLATCH is a high-impedance input. Use external pullup or pulldown. UVIN Undervoltage Input. UV is low when UVIN is below the internal 0.5V threshold. UV is high when UVIN is above the internal 0.5V threshold. Undervoltage Output. UV is low when UVIN is below the internal 0.5V threshold. UV is high when UVIN is above the internal 0.5V threshold. There is no timeout delay period for the UV output. Overvoltage Input. OV is low when OVIN is above the internal 0.5V threshold. OV is high when OVIN is below the internal 0.5V threshold. Exposed Pad. EP is internally connected to GND. Leave EP unconnected or connect to GND.
--
--
--
3
--
--
--
4
UV
-- --
-- --
-- EP
6 --
OVIN EP
Functional Diagrams
VCC
MR ADJUST MONITOR VOLTAGE UVTH UV MONITOR SET (RESET)/ RESET
TIMEOUT PERIOD OPTION
OVTH OV MONITOR GND
UV THRESHOLD -5%, -10%, -15%
OV THRESHOLD +5%, +10%, +15%
MAX6754/MAX6755/MAX6756
INTERNAL REFERENCE
( ) MAX6755 ONLY.
Figure 1. MAX6754/MAX6755/MAX6756 Functional Diagram 10 ______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors
Functional Diagrams (continued)
MAX6754-MAX6764
VCC
ADJUST MONITOR VOLTAGE UVTH UV MONITOR SET VCC
TIMEOUT PERIOD OPTION
(UV)/ UV
MR
OV OVTH OV MONITOR GND
UV THRESHOLD -5%, -10%, -15%
OV THRESHOLD +5%, +10%, +15%
MAX6757/MAX6758/MAX6759
INTERNAL REFERENCE
( ) MAX6758 ONLY.
Figure 2. MAX6757/MAX6758/MAX6759 Functional Diagram
______________________________________________________________________________________
11
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
Functional Diagrams (continued)
VCC MR
ADJUST MONITOR VOLTAGE UVTH UV MONITOR TIMEOUT PERIOD OPTION
(UV)/ UV
OVTH SET UV THRESHOLD -5%, -10%, -15% OV MONITOR
OV CIRCUIT
OV
OVLATCH OV THRESHOLD +5%, +10%, +15%
INTERNAL REFERENCE GND UVTH VCC2 ADJUST MONITOR VOLTAGE UV MONITOR
MAX6760/MAX6761/MAX6762
OVTH OV MONITOR
( ) MAX6761 ONLY.
Figure 3. MAX6760/MAX6761/MAX6762 Functional Diagram
12
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors
Functional Diagrams (continued)
The MAX6754-MAX6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9V to 5V. The MAX6754-MAX6762 include a SET function to select the window voltage to 5%, 10%, or 15%. The MAX6763/MAX6764 allow for externally adjustable upper and lower voltage thresholds to be set externally (down to 0.5V). The MAX6754-MAX6762 are available with two timing options (20s propagation delay or 100ms minimum reset timeout).
MAX6754-MAX6764
UVIN
MAX6763/MAX6764
UV
UVTH VCC INTERNAL REFERENCE 0.5V OVTH
UV MONITOR GND
Supply Voltages
VCC is the power-supply input and the monitored voltage of the MAX6754-MAX6762. These devices feature a factory-trimmed VCC and VCC2 divider that sets the nominal input range (see Tables 1 and 2). VCC for the MAX6763/ MAX6764 is the power supply of the device and not the monitored voltage. For noisy systems, bypass VCC and VCC2 each with a 0.1F capacitor to GND.
OV OVIN OV MONITOR
Setting the Adjustable Nominal Voltage Threshold
The MAX6760/MAX6761/MAX6762 (versions with suffixes LA, TA, RA, ZA, WA, and AA) offer adjustable nominal voltage threshold to monitor VCC2. Use an external voltage-divider to set the voltage at V CC2 to 0.4255V. Configure SET to select a monitor window of 5%, 10%, or 15% (see Figure 5). The MAX6760/MAX6761/ MAX6762 suffix AA monitor only VCC2 and do not monitor VCC.
Figure 4. MAX6763/MAX6764 Functional Diagram
Detailed Description
The MAX6754-MAX6764 are low-power window voltage detectors capable of monitoring undervoltage and overvoltage conditions on system power supplies. Whenever a monitored voltage falls below its undervoltage threshold or exceeds its overvoltage threshold, these devices assert their outputs to notify the system (see Functional Diagrams). The MAX6754/MAX6755/MAX6756 are single-voltage window detectors with internally fixed nominal voltage, externally adjustable set window, single reset under/overvoltage output, and a manual reset input. The MAX6757/MAX6758/MAX6759 are single-voltage window detectors with internally set nominal voltage, externally adjustable set window, separate under/overvoltage outputs, and manual reset input. The MAX6760/MAX6761/MAX6762 are dual-voltage window detectors with internally/externally set nominal voltages, externally adjustable set window, separate under/overvoltage outputs, manual reset input, and overvoltage latch functions. The MAX6763/MAX6764 are single adjustable window detectors with separate under/overvoltage outputs.
V+
0.4255V +5% +10% +15% R1 VCC2
OV
R2
(UV) UV 0.4255V -5% -10% -15%
MAX6760/MAX6761/MAX6762 (SUFFIXES LA, TA, RA, ZA, WA, AA)
( ) MAX6761 ONLY.
Figure 5. Setting the Threshold Voltage of VCC2
______________________________________________________________________________________
13
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
V+ R1 UVIN
Overvoltage Latch Control Input (OVLATCH)
MAX6763/MAX6764
UV
UVTH R2 VCC INTERNAL REFERENCE 0.5V OVTH
UV MONITOR GND
The MAX6760/MAX6761/MAX6762 provide an overvoltage latch control input (OVLATCH). Drive OVLATCH high to latch the overvoltage output for any VCC or VCC2 overvoltage condition. Drive OVLATCH low to clear the latch after overvoltage conditions have been removed. The latch is transparent when OVLATCH is connected to GND. OVLATCH is a high impedance input. Use external pullup or pulldown.
Reset, Undervoltage, and Overvoltage Outputs (RESET, RESET, UV, UV, OV)
OV
OVIN OV MONITOR R3 OVERVOLTAGE ASSERTS WHEN UNDERVOLTAGE ASSERTS WHEN V+ x R3 R1 + R2 + R3 V+ x (R2 + R3) R1 + R2 + R3 > 0.5V < 0.5V
Figure 6. Setting the Under/Overvoltage Window
RESET, RESET, UV, UV, and OV outputs assert when the monitored supply is below the selected UVTH threshold or above the selected OVTH threshold. The reset output deasserts after the specified timeout period when the monitored supply rises above the UVTH threshold or drops below the OV TH threshold. The push-pull versions are referenced to VCC. The MAX6760/MAX6761/MAX6762 monitor both V CC and VCC2. An under/overvoltage condition on either voltage supply asserts the corresponding output. RESET and UV are guaranteed to be in the correct logic state when VCC or VCC2 > 1V.
MR
Choose R2 to have a resistance of up to 500k. Calculate R1 by: R1 = ((V+ - 0.4255V) x R2) / 0.4255V The MAX6763/MAX6764 provide inputs to a window detector allowing the programming of the threshold voltage to within VCC (see Figure 6). Choose R1, R2, and R3 such that: (V+ / (R1 + R2 + R3)) 1A
tD-MR
RESET, UV
tMR_P
SET
The MAX6754-MAX6762 allow the setting of the window voltage range of the voltage detector. Connect SET to GND to set a 5% window. Connect SET to VCC for a 10% window. Bias SET to VCC/2 for a 15% window.
Figure 7a. Manual Reset/Reset Timing Diagram
VCC
Manual Reset (MR)
The MAX6754-MAX6762 include an active-low manual reset input. Drive MR low to assert a reset output (MAX6754/MAX6755/MAX6756) or an undervoltage output (MAX6757/MAX6758/MAX6759). The output remains asserted for the specified propagation delay time (see Figure 7) after MR goes high. MR is internally pulled to VCC with a 26k resistor.
tD-UV
RESET, UV
tRP
(RESET IS THE COMPLEMENT OF RESET)
Figure 7b. VCC/RESET, UV Timing Diagram
14
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors
Applications Information
Microprocessor Monitoring
Figure 8 shows a microprocessor monitoring circuit. An overvoltage condition on either the core or I/O supply turns the SCR on, blowing the fuse to disconnect the circuit from the power source. An optional capacitor (C1) on the gate of the SCR provides additional transient immunity against nuisance trips.
MAX6754-MAX6764
CORE DC-DC CONVERTER
CORE
FUSE
I/O DC-DC CONVERTER
I/O P
UNREGULATED POWER SOURCE VCC2
MAX6760
MR PUSH BUTTON VCC OVLATCH
SCR
100k
100k
GND
UV
RESET
SET 100k
OV
NMI
*C1 1F
*OPTIONAL.
Figure 8. Microprocessor Monitoring
Selector Guide
PUSH-PULL RESET MAX6754 MAX6755 MAX6756 MAX6757 MAX6758 MAX6759 MAX6760 MAX6761 MAX6762 MAX6763 MAX6764 X -- -- -- -- -- -- -- -- -- -- PUSH-PULL OPEN-DRAIN PUSH-PULL RESET RESET UV -- X -- -- -- -- -- -- -- -- -- -- -- X -- -- -- -- -- -- -- -- -- -- -- X -- -- X -- -- X -- PUSH-PULL OPEN-DRAIN PUSH-PULL OPEN-DRAIN UV UV OV OV -- -- -- -- X -- -- X -- -- X -- -- -- -- -- X -- -- X -- -- -- -- -- -- -- -- -- -- -- X -- X X X X X X -- X -- --
______________________________________________________________________________________
15
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
Table 1. Window Threshold Voltage Suffix Guide Single Fixed VCC (MAX6754--MAX6759)
PART NO. SUFFIX L T R Z W VCC NOMINAL SYSTEM VOLTAGE (V) 5.0 3.3 3.0 2.5 1.8
Table 3. Timeout Period Suffix Guide
TIMEOUT PERIOD SUFFIX D0 D3 ACTIVE TIMEOUT PERIOD MIN (ms) -- 100 TYP (MS) 0.02 185 MAX (ms) -- 320
Ordering Information (continued)
PART* MAX6759UT_D_-T MAX6760TA_ _D_-T MAX6761TA_ _D_-T MAX6762TA_ _D_-T MAX6763UT-T MAX6764UT-T TEMP RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C PIN-PACKAGE 6 SOT23-6 8 TDFN-8 8 TDFN-8 8 TDFN-8 6 SOT23-6 6 SOT23-6
Table 2. Window Threshold Voltage Suffix Guide Dual Fixed/Adjustable (MAX6760/MAX6761/MAX6762)
PART NO. SUFFIX LT LR LA TZ TW TI TG TE TA RZ RW RI RG RE RA ZW ZI ZG ZE ZA WI WG WE WA AA VCC NOMINAL SYSTEM VOLTAGE (V) 5 5 5 3.3 3.3 3.3 3.3 3.3 3.3 3.0 3.0 3.0 3.0 3.0 3.0 2.5 2.5 2.5 2.5 2.5 1.8 1.8 1.8 1.8 - VCC2 NOMINAL SYSTEM VOLTAGE (V) 3.3 3.0 ADJ* 2.5 1.8 1.5 1.2 0.9 ADJ* 2.5 1.8 1.5 1.2 0.9 ADJ* 1.8 1.5 1.2 0.9 ADJ* 1.5 1.2 0.9 ADJ* ADJ*
*Note: Insert the threshold level suffixes for VCC and VCC2 (Tables 1 and 2) after UK, UT, or TA. For the MAX6754-MAX6759, insert only the VCC threshold suffix after the UK or UT. Insert the reset timeout delay (Table 3) after D to complete the part number. For example, the MAX6760TALTD3-T provides a VCC threshold of 5V, a VCC2 threshold of 3.3V, and a 100ms minimum reset timeout period. Sample stock is generally held on standard versions only (see the Standard Versions table). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability.
*See Setting the Adjustable Nominal Voltage Threshold Section.
16
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
Standard Versions Table
PART MAX6754UKLD0 MAX6754UKLD3 MAX6754UKTD0 MAX6754UKTD3 MAX6754UKZD0 MAX6754UKZD3 MAX6754UKWD0 MAX6754UKWD3 MAX6755UKLD0 MAX6755UKLD3 MAX6755UKTD0 MAX6755UKTD3 MAX6755UKZD0 MAX6755UKZD3 MAX6755UKWD0 MAX6755UKWD3 MAX6756UKLD0 MAX6756UKLD3 MAX6756UKTD0 MAX6756UKTD3 MAX6756UKZD0 MAX6756UKZD3 MAX6756UKWD0 MAX6756UKWD3 MAX6757UTTD0 MAX6757UTTD3 MAX6757UTLD0 MAX6757UTLD3 MAX6757UTZD0 MAX6757UTZD3 MAX6757UTWD0 MAX6757UTWD3 TOP MARK AEOC AEJN AEOD AEJO AEJQ AEOF AEOG AEJR AEOH AEJS AEOI AEJT AEKV AEOK AEOL AEJW AEJX AEOM AEJY AEON AEOP AEKA AEKB AEOQ ABST ABRB ABSO ABRC ABRE ABSW ABSX ABRF PART MAX6758UTLD0 MAX6758UTLD3 MAX6758UTTD0 MAX6758UTTD3 MAX6758UTZD0 MAX6758UTZD3 MAX6758UTWD0 MAX6758UTWD3 MAX6759UTLD0 MAX6759UTLD3 MAX6759UTTD0 MAX6759UTTD3 MAX6759UTZD0 MAX6759UTZD3 MAX6759UTWD0 MAX6759UTWD3 MAX6760TALTD3 MAX6760TALAD3 MAX6760TATZD3 MAX6760TATWD3 MAX6760TATAD3 MAX6760TARAD3 MAX6760TAZWD3 MAX6760TAZAD3 MAX6760TAWED3 MAX6760TAWAD3 TOP MARK ABSY ABRG ABSZ ABRH ABRJ ABTB ABTC ABRK ABRL ABTD ABRM ABTE ABTG ABRO ABRP ABTH AIO AHI AIR AHJ AIT AIV AIX AIZ AJB AHL
______________________________________________________________________________________
17
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
Standard Versions Table (continued)
PART MAX6761TALTD3 MAX6761TALAD3 MAX6761TATZD3 MAX6761TATWD3 MAX6761TATAD3 MAX6761TARAD3 MAX6761TAZWD3 MAX6761TAZAD3 MAX6761TAWED3 MAX6761TAWAD3 TOP MARK AJD AHN AJG AHO AJI AJK AJM AJO AJQ AHQ PART MAX6762TALTD3 MAX6762TALAD3 MAX6762TATZD3 MAX6762TATWD3 MAX6762TATAD3 MAX6762TARAD3 MAX6762TAZWD3 MAX6762TAZAD3 MAX6762TAWED3 MAX6762TAWAD3 MAX6763UT MAX6764UT TOP MARK AJT AHR AJW AJY AKA AKB AHT AKE AKF AKH ABRQ ABRR
18
______________________________________________________________________________________
Low-Power, Single/Dual-Voltage Window Detectors
Pin Configurations
TOP VIEW
VCC 1 5 SET VCC 1 GND 2 GND 2 8 MR
MAX6754-MAX6764
MAX6754 MAX6755 MAX6756
4 RESET (RESET)
VCC2 3 SET 4
MAX6760 MAX6761 MAX6762
7 OVLATCH 6 UV (UV) 5 OV
MR 3
TDFN
( ) MAX6761 ONLY.
SOT23
( ) MAX6755 ONLY.
VCC 1
6
SET
VCC 1
6
OVIN
GND 2
MAX6757 MAX6758 MAX6759
5
OV
GND 2
MAX6763 MAX6764
5
OV
MR
3
4
UV (UV)
UVIN 3
4
UV
SOT23
( ) MAX6758 ONLY.
SOT23
Chip Information
TRANSISTOR COUNT: 726 PROCESS: BiCMOS
______________________________________________________________________________________
19
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
L D A A2
PIN 1 ID
D2
1
N
1
b
PIN 1 INDEX AREA
C0.35 [(N/2)-1] x e REF. e
E
DETAIL A
E2
A1
k
C L
C L
L e A e
L
SEMICONDUCTOR
PROPRIETARY INFORMATION TITLE:
DALLAS
PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
APPROVAL DOCUMENT CONTROL NO. REV.
21-0137
D
1 2
COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 2.90 2.90 0.00 0.20 MAX. 0.80 3.10 3.10 0.05 0.40
0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T633-1 T833-1 T1033-1 N 6 8 10 D2 1.500.10 1.500.10 1.500.10 E2 2.300.10 2.300.10 2.300.10 e 0.95 BSC 0.65 BSC 0.50 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEC MO229 / WEED-3 b 0.400.05 0.300.05 0.250.05 [(N/2)-1] x e 1.90 REF 1.95 REF 2.00 REF
SEMICONDUCTOR
PROPRIETARY INFORMATION TITLE:
DALLAS
PACKAGE OUTLINE, 6, 8 & 10L, TDFN, EXPOSED PAD, 3x3x0.80 mm
APPROVAL DOCUMENT CONTROL NO. REV.
21-0137
D
2 2
20
______________________________________________________________________________________
6, 8, &10L, DFN THIN.EPS
Low-Power, Single/Dual-Voltage Window Detectors
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX6754-MAX6764
PACKAGE OUTLINE, SOT-23, 5L
21-0057
E
1
1
______________________________________________________________________________________
SOT-23 5L .EPS
21
Low-Power, Single/Dual-Voltage Window Detectors MAX6754-MAX6764
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE, SOT-23, 6L
21-0058
F
1
1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
6LSOT.EPS
This datasheet has been download from: www..com Datasheets for electronics components.

▲Up To Search▲

Price & Availability of MAX6754

	To Download MAX6754 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .