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Features
* Fast Read Access Time - 55ns * Dual Voltage Range Operation * * *
- Low-voltage Power Supply Range, 3.0V to 3.6V or Standard 5V 10% Supply Range Pin Compatible with JEDEC Standard AT27C256R Low-power CMOS Operation - 20 A max. (less than 1 A typical) Standby for VCC = 3.6V - 29 mW max. Active at 5 MHz for VCC = 3.6V JEDEC Standard Packages - 32-lead PLCC - 28-lead 330-mil SOIC - 28-lead TSOP High-reliability CMOS Technology - 2,000V ESD Protection - 200 mA Latchup Immunity RapidTM Programming Algorithm - 100 s/byte (typical) CMOS and TTL Compatible Inputs and Outputs - JEDEC Standard for LVTTL Integrated Product Identification Code Commercial and Industrial Temperature Ranges
* * * * *
256K (32K x 8) Low-voltage OTP EPROM AT27LV256A
Description
The AT27LV256A is a high performance, low power, low voltage 262,144-bit one-time programmable read only memory (OTP EPROM) organized as 32K by 8 bits. It requires only one supply in the range of 3.0V to 3.6V in normal read mode operation, (continued)
Pin Configurations
Pin Name A0 - A14 O0 - O7 CE OE NC Function Addresses Outputs Chip Enable Output Enable No Connect
VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 O0 O1 O2 GND
SOIC Top View
1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC A14 A13 A8 A9 A11 OE A10 CE O7 O6 O5 O4 O3
PLCC Top View
A7 A12 VPP NC VCC A14 A13
TSOP Top View Type 1
A8 A9 A11 NC OE A10 CE O7 O6 OE A11 A9 A8 A13 A14 VCC VPP A12 A7 A6 A5 A4 A3 22 23 24 25 26 27 28 1 2 3 4 5 6 7 21 20 19 18 17 16 15 14 13 12 11 10 9 8 A10 CE O7 O6 O5 O4 O3 GND O2 O1 O0 A0 A1 A2
O1 O2 GND NC O3 O4 O5
14 15 16 17 18 19 20
A6 A5 A4 A3 A2 A1 A0 NC O0
5 6 7 8 9 10 11 12 13
4 3 2 1 32 31 30
29 28 27 26 25 24 23 22 21
Note: PLCC Package Pins 1 and 17 are DON'T CONNECT.
Rev. 0547C-05/00
1
making it ideal for fast, portable systems using battery power. Atmel's innovative design techniques provide fast speeds that rival 5V parts while keeping the low power consumption of a 3.3V supply. At V CC = 3.0V, any byte can be accessed in less than 55 ns. With a typical power dissipation of only 18 mW at 5 MHz and V C C = 3.3V, the AT27LV256A consumes less than one fifth the power of a standard 5V EPROM. Standby mode supply current is typically less than 1 A at 3.3V. The AT27LV256A is available in industry standard JEDECapproved one-time programmable (OTP) plastic PLCC, SOIC and TSOP packages. All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention. The AT27LV256A operating with VCC at 3.0V produces TTL level outputs that are compatible with standard TTL logic devices operating at VCC = 5.0V. The device is also capable of standard 5-volt operation making it ideally suited for dual supply range systems or card products that are pluggable in both 3-volt and 5-volt hosts. Atmel's AT27LV256A has additional features to ensure high quality and efficient production use. The RapidTM Programming Algorithm reduces the time required to program
the part and guarantees reliable programming. Programming time is typically only 100 s/byte. The Integrated Product Identification Code electronically identifies the device and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages. The AT27LV256A programs exactly the same way as a standard 5V AT27C256R and uses the same programming equipment.
System Considerations
Switching between active and standby conditions via the Chip Enable pin may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a 0.1 F high frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the V CC and Ground terminals of the device, as close to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a 4.7 F bulk electrolytic capacitor should be utilized, again connected between the VCC and Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array.
Block Diagram
2
AT27LV256A
AT27LV256A
Absolute Maximum Ratings*
Temperature Under Bias.................................. -40C to +85C Storage Temperature ..................................... -65C to +125C Voltage on Any Pin with Respect to Ground .........................................-2.0V to +7.0V(1) Voltage on A9 with Respect to Ground ......................................-2.0V to +14.0V(1) VPP Supply Voltage with Respect to Ground .......................................-2.0V to +14.0V(1) Note: 1. Minimum voltage is -0.6V DC which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is VCC + 0.75V DC which may be exceeded if certain precautions are observed (consult application notes) and which may overshoot to +7.0V for pulses of less than 20 ns. *NOTICE: Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability
Operating Modes
Mode \ Pin Read
(2) (2)
CE VIL VIL VIH
(3)
OE VIL VIH X(1) VIH VIL VIL VIH VIL
Ai Ai X
(1)
VPP VCC VCC VCC VPP VPP VCC VPP VCC
VCC VCC VCC
(2) (2)
Outputs DOUT High Z High Z DIN DOUT DOUT High Z Identification Code
Output Disable Standby(2)
X(1) Ai Ai Ai X(1) A9 = A0 = VIH or VIL A1 - A14 = VIL VH(4)
VCC(2) VCC VCC VCC
(3) (3) (3)
Rapid Program PGM Verify
(3)
VIL X
(3) (1)
Optional PGM Verify PGM Inhibit(3)
VIL VIH VIL
VCC(3) VCC(3)
Product Identification(3)(5) Notes: 1. X can be VIL or VIH.
2. Read, output disable, and standby modes require, 3.0V VCC 3.6V, or 4.5V VCC 5.5V. 3. Refer to Programming Characteristics. Programming modes require VCC = 6.5V. 4. VH = 12.0 0.5V. 5. Two identifier bytes may be selected. All Ai inputs are held low (VIL), except A9 which is set to VH and A0 which is toggled low (VIL) to select the Manufacturer's Identification byte and high (VIH) to select the Device Code byte.
3
DC and AC Operating Conditions for Read Operation
AT27LV256A -55 Operating Temperature (Case) VCC Power Supply Com. Ind. 0C - 70C -40C - 85C 3.0V to 3.6V 5V 10% -70 0C - 70C -40C - 85C 3.0V to 3.6V 5V 10% -90 0C - 70C -40C - 85C 3.0V to 3.6V 5V 10% -12 0C - 70C -40C - 85C 3.0V to 3.6V 5V 10% -15 0C - 70C -40C - 85C 3.0V to 3.6V 5V 10%
DC and Operating Characteristics for Read Operation
Symbol Parameter Condition Min Max Units VCC = 3.0V to 3.6V ILI ILO IPP1 ISB ICC VIL VIH VOL VOH
(2)
Input Load Current Output Leakage Current VPP
(1)
VIN = 0V to VCC VOUT = 0V to VCC VPP = VCC ISB1 (CMOS), CE = VCC= 0.3V ISB2 (TTL), CE = 2.0 to VCC + 0.5V f = 5 MHz, IOUT = 0 mA, CE = VIL -0.6 2.0 IOL = 2.0 mA IOH = -2.0=mA 2.4
1 5 10 20 100 8 0.8 VCC + 0.5 0.4
A A A A A mA V V V V
Read/Standby Current
VCC(1) Standby Current VCC Active Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage
VCC = 4.5V to 5.5V ILI ILO IPP1 ISB ICC VIL VIH VOL VOH Notes:
(2)
Input Load Current Output Leakage Current VPP
(1)
VIN = 0V to VCC VOUT = 0V to VCC VPP = VCC ISB1 (CMOS), CE = VCC 0.3V ISB2 (TTL), CE = 2.0 to VCC + 0.5V f = 5 MHz, IOUT = 0 mA, CE = VIL -0.6 2.0 IOL = 2.1 mA IOH = -400 A 2.4
1 5 10 100 1 20 0.8 VCC + 0.5 0.4
A A A A mA mA V V V V
Read/Standby Current
VCC(1) Standby Current VCC Active Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage
1. VCC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP. 2. VPP may be connected directly to VCC, except during programming. The supply current would then be the sum of ICC and IPP.
4
AT27LV256A
AT27LV256A
AC Characteristics for Read Operation
VCC = 3.0V to 3.6V and 4.5V to 5.5V
AT27LV256A -55 Symbol tACC(3) tCE(2) tOE(2)(3) tDF(4)(5) Parameter Address to Output Delay CE to Output Delay OE to Output Delay OE or CE High to Output Float, whichever occurred first Output Hold from Address, CE or OE, whichever occurred first 0 Condition CE = OE = VIL OE = VIL CE = VIL
Max Min Min
-70
Max Min
-90
Max Min
-12
Max Min
-15
Max
Units ns ns ns ns
55 55 35 30
70 70 50 40
90 90 50 40
120 120 50 40
150 150 60 50
tOH
0
0
0
0
ns
AC Waveforms for Read Operation(1)
Notes:
1. Timing measurement references are 0.8V and 2.0V. Input AC drive levels are 0.45V and 2.4V, unless otherwise specified. 2. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE. 3. OE may be delayed up to tACC - tOE after the address is valid without impact on tACC. 4. This parameter is only sampled and is not 100% tested. 5. Output float is defined as the point when data is no longer driven.
5
Input Test Waveforms and Measurement Levels
Output Test Load
tR, tF < 20 ns (10% to 90%) Note: CL = 100 pF including jig capacitance.
Pin Capacitance
f = 1 MHz, T = 25C(1)
Symbol CIN COUT Note: Typ 4 8 Max 8 12 Units pF pF Conditions VIN = 0V VOUT = 0V
1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
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AT27LV256A
AT27LV256A
Programming Waveforms(1)
Notes:
1. 2. 3.
The Input Timing Reference is 0.8V for VIL and 2.0V for VIH. tOE and tDFP are characteristics of the device but must be accommodated by the programmer. When programming the AT27LV256A a 0.1 F capacitor is required across VPP and ground to suppress spurious voltage transients.
DC Programming Characteristics
TA = 25 5C, VCC = 6.5 0.25V, VPP = 13.0 0.25V
Limits Symbol ILI VIL VIH VOL VOH ICC2 IPP2 VID Parameter Input Load Current Input Low Level Input High Level Output Low Voltage Output High Voltage VCC Supply Current (Program and Verify) VPP Current A9 Product Identification Voltage CE = VIL 11.5 IOL = 2.1 mA IOH = -400 =A 2.4 25 25 12.5 Test Conditions VIN = VIL, VIH -0.6 2.0 Min Max 10 0.8 VCC + 0.5 0.4 Units
A
V V V V mA mA V
7
AC Programming Characteristics
TA = 25 5C, VCC = 6.5 0.25V, VPP = 13.0 0.25V
Limits Symbol tAS tOES tDS tAH tDH tDFP tVPS tVCS tPW tOE tPRT Notes: Parameter Address Setup Time OE Setup Time Data Setup Time Address Hold Time Data Hold Time OE High to Output Float Delay(2) VPP Setup Time VCC Setup Time CE Program Pulse Width Data Valid from OE(2) VPP Pulse Rise Time During Programming
(3)
Test Conditions
(1)
Min 2 2
Max
Units s s s s s
Input Rise and Fall Times: (10% to 90%) 20 ns Input Pulse Levels: 0.45V to 2.4V Input Timing Reference Level: 0.8V to 2.0V Output Timing Reference Level: 0.8V to 2.0V
2 0 2 0 2 2 95 105 150 50 130
ns s s s ns ns
1. VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP. 2. This parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven-- see timing diagram. 3. Program Pulse width tolerance is 100 sec==5%.
Atmel's 27LV256A Integrated Product Identification Code(1)
Pins Codes Manufacturer Device Type Note: A0 0 1 O7 0 1 O6 0 0 O5 0 0 O4 1 0 O3 1 1 O2 1 1 O1 1 0 O0 0 0 Hex Data 1E 8C
1. The AT27LV256A has the same Product Identification Code as the AT27C256R. Both are programming compatible.
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AT27LV256A
AT27LV256A
Rapid Programming Algorithm
A 100 s CE pulse width is used to program. The address is set to the first location. VCC is raised to 6.5V and VPP is raised to 13.0V. Each address is first programmed with one 100 s CE pulse without verification. Then a verification / reprogramming loop is executed for each address. In the event a byte fails to pass verification, up to 10 successive 100 s pulses are applied with a verification after each pulse. If the byte fails to verify after 10 pulses have been applied, the part is considered failed. After the byte verifies properly, the next address is selected until all have been checked. VPP is then lowered to 5.0V and VCC to 5.0V. All bytes are read again and compared with the original data to determine if the device passes or fails.
9
Ordering Information
tACC (ns) 55 ICC (mA) Active 8 Standby 0.02 Ordering Code AT27LV256A-55JC AT27LV256A-55RC AT27LV256A-55TC AT27LV256A-55JI AT27LV256A-55RI AT27LV256A-55TI AT27LV256A-70JC AT27LV256A-70RC AT27LV256A-70TC AT27LV256A-70JI AT27LV256A-70RI AT27LV256A-70TI AT27LV256A-90JC AT27LV256A-90RC AT27LV256A-90TC AT27LV256A-90JI AT27LV256A-90RI AT27LV256A-90TI AT27LV256A-12JC AT27LV256A-12RC AT27LV256A-12TC AT27LV256A-12JI AT27LV256A-12RI AT27LV256A-12TI AT27LV256A-15JC AT27LV256A-15RC AT27LV256A-15TC AT27LV256A-15JI AT27LV256A-15RI AT27LV256A-15TI Package 32J 28R 28T 32J 28R 28T 32J 28R 28T 32J 28R 28T 32J 28R 28T 32J 28R 28T 32J 28R 28T 32J 28R 28T 32J 28R 28T 32J 28R 28T Operation Range Commercial (0C to 70C) Industrial (-40C to 85C) Commercial (0C to 70C) Industrial (-40C to 85C) Commercial (0C to 70C) Industrial (-40C to 85C) Commercial (0C to 70C) Industrial (-40C to 85C) Commercial (0C to 70C) Industrial (-40C to 85C)
8
0.02
70
8
0.02
8
0.02
90
8
0.02
8
0.02
120
8
0.02
8
0.02
150
8
0.02
8
0.02
Package Type 32J 28R 28T 32-lead, Plastic J-Leaded Chip Carrier (PLCC) 28-lead, 0.330" Wide, Plastic Gull Wing Small Outline (SOIC) 28-lead, Thin Small Outline Package (TSOP)
10
AT27LV256A
AT27LV256A
Packaging Information
32J, 32-lead, Plastic J-Leaded Chip Carrier (PLCC) Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-016 AE
28R, 28-lead, 0.330" Wide, Plastic Gull Wing Small Outline (SOIC) Dimensions in Inches and (Millimeters)
.045(1.14) X 45
PIN NO. 1 IDENTIFY
.025(.635) X 30 - 45 .012(.305) .008(.203) .530(13.5) .490(12.4) .021(.533) .013(.330) .030(.762) .015(.381) .095(2.41) .060(1.52) .140(3.56) .120(3.05)
.032(.813) .026(.660)
.553(14.0) .547(13.9) .595(15.1) .585(14.9)
.050(1.27) TYP
.300(7.62) REF .430(10.9) .390(9.90) AT CONTACT POINTS
.022(.559) X 45 MAX (3X) .453(11.5) .447(11.4) .495(12.6) .485(12.3)
28T, 28-lead, Plastic Thin Small Outline Package (TSOP) Dimensions in Millimeters and (Inches)*
INDEX MARK AREA 11.9 (0.469) 11.7 (0.461) 13.7 (0.539) 13.1 (0.516)
0.55 (0.022) BSC 7.15 (0.281) REF 8.10 (0.319) 7.90 (0.311)
0.27 (0.011) 0.18 (0.007)
1.25 (0.049) 1.05 (0.041)
0.20 (0.008) 0.10 (0.004) 0 5 REF 0.20 (0.008) 0.15 (0.006)
0.70 (0.028) 0.30 (0.012)
*Controlling dimension: millimeters
11
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(c) Atmel Corporation 2000. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life suppor t devices or systems. Marks bearing
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0547B-05/98/xM
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