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ISL8488E, ISL8489E, ISL8491E
Data Sheet October 20, 2004 FN6073.3
15kV ESD Protected, 5V, Low Power, High Speed and Slew Rate Limited, Full Duplex, RS-485/RS-422 Transceivers
The ISL8488E, ISL8489E, ISL8491E devices are ESD protected, BiCMOS, 5V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each driver output and receiver input is protected against 15kV ESD strikes, without latch-up. Unlike competitive versions, these Intersil devices are specified for 10% tolerance supplies (4.5V to 5.5V). These devices are configured for full duplex (separate Rx input and Tx output pins) applications, so they are ideal for RS-422 networks requiring high ESD tolerance on the bus pins. The ISL8488E is an 8 lead version without Rx and Tx output enables. The other two versions include Rx and Tx output enable pins in a standard 14 lead pinout. The ISL8488E, ISL8489E utilize slew rate limited drivers which reduce EMI, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. Data rates up to 10Mbps are achievable by using the ISL8491E, which features higher slew rates. The devices present a "single unit load" to the RS-485 bus, which allows a total of 32 transmitters and receivers on the network. For "1/8 unit load" versions (256 devices on the bus), please refer to the ISL4489E, ISL4491E data sheet. Receiver (Rx) inputs feature a "fail-safe if open" design, which ensures a logic high Rx output if Rx inputs are floating. Driver (Tx) outputs are short circuit protected, even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive.
Features
* RS-485 I/O Pin ESD Protection . . . . . . . . . . . . . 15kV HBM - Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM * High Data Rates (ISL8491E) . . . . . . . . . . . up to 10Mbps * Slew Rate Limited for Error Free Data Transmission (ISL8488E, ISL8489E) * Single Unit Load Allows up to 32 Devices on the Bus (See ISL4489E, ISL4491E for 256 Devices on Bus) * Low Quiescent Current: - 120A (ISL8488E) - 140A (ISL8489E) - 370A (ISL8491E) * -7V to +12V Common Mode Input Voltage Range * Three-State Rx and Tx Outputs (Except ISL8488E) * Full Duplex Pinout * Operates from a Single +5V Supply (10% Tolerance) * Current Limiting and Thermal Shutdown for Driver Overload Protection * Pb-free available (RoHS Compliant)
Applications
* Factory Automation * Security Networks * Building Environmental Control Systems * Industrial/Process Control Networks * Level Translators (e.g., RS-232 to RS-422) * RS-232 "Extension Cords"
TABLE 1. SUMMARY OF FEATURES PART NUMBER ISL8488E ISL8489E ISL8491E HALF/FULL DUPLEX Full Full Full HIGH ESD? Yes Yes Yes NO. OF DEVICES ALLOWED ON BUS 32 32 32 DATA RATE (Mbps) 0.25 0.25 10 SLEW-RATE RECEIVER/ QUIESCENT PIN LIMITED? DRIVER ENABLE? ICC (A) COUNT Yes Yes No No Yes Yes 120 140 370 8 14 14
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright (c) Intersil Americas Inc. 2004. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
ISL8488E, ISL8489E, ISL8491E Pinouts
ISL8488E (SOIC) TOP VIEW
VCC 1 RO 2 DI 3 GND 4 D 8 7 6 5 A B Z Y
Ordering Information
PART NO. * (BRAND) ISL8488EIB (8488EIB) ISL8488EIBZA (8488EIBZ, See Note) ISL8489EIB ISL8489E, ISL8491E (SOIC) TOP VIEW
NC 1 RO 2 R RE 3 DE 4 DI 5 GND 6 GND 7 D 12 A 11 B 10 Z 9Y 8 NC 14 VCC 13 NC
TEMP. RANGE (C) -40 to 85 -40 to 85
PACKAGE 8 Ld SOIC 8 Ld SOIC (Pb-free) 14 Ld SOIC 14 Ld SOIC (Pb-free) 14 Ld SOIC 14 Ld SOIC (Pb-free)
PKG. DWG. # M8.15 M8.15
R
-40 to 85 -40 to 85 -40 to 85 -40 to 85
M14.15 M14.15 M14.15 M14.15
ISL8489EIBZ (See Note) ISL8491EIB ISL8491EIBZ (See Note)
*Add "-T" suffix to part number for tape and reel packaging. NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020C.
Truth Tables (For ISL8488E, only the DE = 1 and RE = 0 entries are valid)
TRANSMITTING INPUTS RE X X X DE 1 1 0 DI 1 0 X Z 0 1 High-Z OUTPUTS Y 1 0 High-Z RE 0 0 0 1 RECEIVING INPUTS DE X X X X A-B +0.2V -0.2V Inputs Open X OUTPUT RO 1 0 1 High-Z
Pin Descriptions
PIN RO RE DE DI GND A B Y Z VCC NC FUNCTION Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating). Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low. Ground connection. 15kV HBM ESD Protected, Noninverting receiver input. 15kV HBM ESD Protected, Inverting receiver input. 15kV HBM ESD Protected, Noninverting driver output. 15kV HBM ESD Protected, Inverting driver output. System power supply input (4.5V to 5.5V). No Connection.
2
FN6073.3
ISL8488E, ISL8489E, ISL8491E Typical Operating Circuit
ISL8488E
+5V + 0.1F 1 VCC A 2 RO R B 8 7 RT 5 6 Y Z D DI 3 0.1F 1 VCC + +5V
Z 3 DI D GND 4 Y
6 5
RT
7 8
B A GND 4 R RO 2
ISL8489E, ISL8491E
+5V + 14 VCC 2 3 4 5 RO RE DE Z DI D GND 6, 7 Y 10 9 RT 11 12 B A GND 6, 7 R RO 2 R A B 12 11 0.1F RT 0.1F + 14 9 10 Y Z VCC D DI DE RE 5 4 3 +5V
3
FN6073.3
ISL8488E, ISL8489E, ISL8491E
Absolute Maximum Ratings
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Input Voltages DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VCC +0.5V) Input/Output Voltages A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VCC +0.5V) Short Circuit Duration Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Thermal Information
Thermal Resistance (Typical, Note 1)
JA (C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . 170 14 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . 128 Maximum Junction Temperature (Plastic Package) . . . . . . . 150C Maximum Storage Temperature Range . . . . . . . . . . . -65C to 150C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300C (Lead Tips Only)
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to 85C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE: 1. JA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25C, Note 2 SYMBOL TEST CONDITIONS TEMP (C) MIN TYP MAX UNITS
PARAMETER DC CHARACTERISTICS Driver Differential VOUT (no load) Driver Differential VOUT (with load) Change in Magnitude of Driver Differential VOUT for Complementary Output States Driver Common-Mode VOUT Change in Magnitude of Driver Common-Mode VOUT for Complementary Output States Logic Input High Voltage Logic Input Low Voltage Logic Input Current
VOD1 VOD2 VOD R = 50 (RS-422) (Figure 1) R = 27 (RS-485) (Figure 1) R = 27 or 50 (Figure 1)
Full Full Full Full
2 1.5 -
3 2.3 0.01
VCC 5 0.2
V V V V
VOC VOC
R = 27 or 50 (Figure 1) R = 27 or 50 (Figure 1)
Full Full
-
0.01
3 0.2
V V
VIH VIL IIN1 IIN2 IOZD VTH VTH VOH VOL IOZR RIN ICC
DE, DI, RE DE, DI, RE DI DE, RE (Note 6)
Full Full Full Full Full Full Full Full 25 Full Full Full Full Full Full Full Full Full
2 0.8 -2 -40 -0.8 -100 -0.2 3.5 12 35 7
70 120 140 370 -
2 40 1 100 0.2 0.4 1 140 190 460 250 85
V V A A mA mA A V mV V V A k A A A mA mA
Input Current (A, B) (Note 5)
DE = 0V, VCC = 0V or 4.5 VIN = 12V to 5.5V VIN = -7V DE = 0V, -7V VO 12V (Note 6) -7V VCM 12V VCM = 0V IO = -4mA, VID = 200mV IO = 4mA, VID = 200mV RE = VCC, 0.4V VO 2.4V (Note 6) -7V VCM 12V ISL8488E, DI = 0V or VCC ISL8489E, DE, DI, RE = 0V or VCC ISL8491E, DE, DI, RE = 0V or VCC
Driver Three-State Output Current (Y, Z) Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Output High Voltage Receiver Output Low Voltage Receiver Three-State Output Current Receiver Input Resistance No-Load Supply Current (Note 3)
Driver Short-Circuit Current, VO = High or Low Receiver Short-Circuit Current
IOSD1 IOSR
DE = VCC, -7V VY or VZ 12V (Note 4) 0V VO VCC
4
FN6073.3
ISL8488E, ISL8489E, ISL8491E
Electrical Specifications
Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25C, Note 2 (Continued) SYMBOL TEST CONDITIONS TEMP (C) MIN TYP MAX UNITS
PARAMETER
SWITCHING CHARACTERISTICS (ISL8488E, ISL8489E) Driver Input to Output Delay Driver Output Skew Driver Differential Rise or Fall Time Driver Enable to Output High Driver Enable to Output Low Driver Disable from Output High Driver Disable from Output Low Receiver Input to Output Delay Receiver Skew | tPLH - tPHL | Receiver Enable to Output High Receiver Enable to Output Low Receiver Disable from Output High Receiver Disable from Output Low Maximum Data Rate tPLH, tPHL RDIFF = 54, CL = 100pF (Figure 2) tSKEW tR, tF tZH tZL tHZ tLZ tSKD tZH tZL tHZ tLZ fMAX tPLH, tPHL RDIFF = 54, CL = 100pF (Figure 2) tSKEW tR, tF tZH tZL tHZ tLZ tSKD tZH tZL tHZ tLZ fMAX Human Body Model RDIFF = 54, CL = 100pF (Figure 2) RDIFF = 54, CL = 100pF (Figure 2) CL = 100pF, SW = GND (Figure 3) CL = 100pF, SW = VCC (Figure 3) CL = 15pF, SW = GND (Figure 3) CL = 15pF, SW = VCC (Figure 3) (Figure 4) CL = 15pF, SW = GND (Figure 5) CL = 15pF, SW = VCC (Figure 5) CL = 15pF, SW = GND (Figure 5) CL = 15pF, SW = VCC (Figure 5) RDIFF = 54, CL = 100pF (Figure 2) RDIFF = 54, CL = 100pF (Figure 2) CL = 100pF, SW = GND (Figure 3, Note 6) CL = 100pF, SW = VCC (Figure 3, Note 6) CL = 15pF, SW = GND (Figure 3, Note 6) CL = 15pF, SW = VCC (Figure 3, Note 6) (Figure 4) CL = 15pF, SW = GND (Figure 5, Note 6) CL = 15pF, SW = VCC (Figure 5, Note 6) CL = 15pF, SW = GND (Figure 5, Note 6) CL = 15pF, SW = VCC (Figure 5, Note 6) Full Full Full Full Full Full Full Full 25 Full Full Full Full Full 250 250 250 250 300 300 250 250 400 160 600 1000 860 660 640 500 60 10 10 10 10 2000 800 2000 2000 2000 3000 3000 2000 50 50 50 50 ns ns ns ns ns ns ns ns ns ns ns ns ns kbps
tPLH, tPHL (Figure 4)
SWITCHING CHARACTERISTICS (ISL8491E) Driver Input to Output Delay Driver Output Skew Driver Differential Rise or Fall Time Driver Enable to Output High Driver Enable to Output Low Driver Disable from Output High Driver Disable from Output Low Receiver Input to Output Delay Receiver Skew | tPLH - tPHL | Receiver Enable to Output High Receiver Enable to Output Low Receiver Disable from Output High Receiver Disable from Output Low Maximum Data Rate ESD PERFORMANCE RS-485 Pins (A, B, Y, Z) All Other Pins NOTES: 2. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. 3. Supply current specification is valid for loaded drivers when DE = 0V. 4. Applies to peak current. See "Typical Performance Curves" for more information. 5. Devices meeting these limits are denoted as "single unit load (1 UL)" transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus. 6. Not applicable to the ISL8488E. 25 25 15 >7 kV kV Full Full Full Full Full Full Full Full 25 Full Full Full Full Full 13 5 30 10 24 3 12 14 14 44 21 90 5 9 9 9 9 50 10 25 70 70 70 70 150 50 50 50 50 ns ns ns ns ns ns ns ns ns ns ns ns ns Mbps
tPLH, tPHL (Figure 4)
5
FN6073.3
ISL8488E, ISL8489E, ISL8491E Test Circuits and Waveforms
R VCC DE DI D Y R VOC Z VOD
FIGURE 1. DRIVER VOD AND VOC
3V DI 1.5V 1.5V 0V tPLH VCC DE DI D Y SIGNAL GENERATOR Z RDIFF CL = 100pF OUT (Z) tPHL 50% tPLH VOH 50% VOL +VOD -VOD CL = 100pF OUT (Y) 50% 50% VOL tPHL VOH
DIFF OUT (Y - Z) tR
90% 10%
90% 10% tF
SKEW = |tPLH (Y or Z) - tPHL (Z or Y)|
FIGURE 2A. TEST CIRCUIT
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
6
FN6073.3
ISL8488E, ISL8489E, ISL8491E Test Circuits and Waveforms (Continued)
DE DI SIGNAL GENERATOR Z D Y CL SW 500 VCC GND tZH OUTPUT HIGH OUT (Y, Z) 2.3V 0V tZL OUT (Y, Z) tLZ VCC 2.3V OUTPUT LOW VOL + 0.5V V OL tHZ VOH - 0.5V VOH 3V DE 1.5V 1.5V 0V
PARAMETER OUTPUT tHZ tLZ tZH tZL Y/Z Y/Z Y/Z Y/Z
RE X X X X
DI 1/0 0/1 1/0 0/1
SW GND VCC GND VCC
CL (pF) 15 15 100 100
FIGURE 3A. TEST CIRCUIT
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL8488E)
RE +1.5V B A R RO
15pF
3V A 1.5V 1.5V 0V tPLH tPHL VCC RO 50% 50% 0V
SIGNAL GENERATOR
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. RECEIVER PROPAGATION DELAY
RE B R SIGNAL GENERATOR A RO 1k SW 15pF VCC GND tZH OUTPUT HIGH RO 1.5V tZL RO 1.5V OUTPUT LOW tHZ RE 1.5V 1.5V
3V 0V
VOH - 0.5V VOH 0V tLZ VCC VOL + 0.5V V
OL
PARAMETER tHZ tLZ tZH tZL
DE X X X X
A +1.5V -1.5V +1.5V -1.5V
SW GND VCC GND VCC
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. RECEIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL8488E)
7
FN6073.3
ISL8488E, ISL8489E, ISL8491E Application Information
RS-485 and RS-422 are differential (balanced) data transmission standards for use in long haul or noisy environments. RS-422 is a subset of RS-485, so RS-485 transceivers are also RS-422 compliant. RS-422 is a pointto-multipoint (multidrop) standard, which allows only one driver and up to 10 (assuming one unit load devices) receivers on each bus. RS-485 is a true multipoint standard, which allows up to 32 one unit load devices (any combination of drivers and receivers) on each bus. To allow for multipoint operation, the RS-485 spec requires that drivers must handle bus contention without sustaining any damage. Another important advantage of RS-485 is the extended common mode range (CMR), which specifies that the driver outputs and receiver inputs withstand signals that range from +12V to -7V. RS-422 and RS-485 are intended for runs as long as 4000', so the wide CMR is necessary to handle ground potential differences, as well as voltages induced in the cable by external fields.
Data Rate, Cables, and Terminations
Twisted pair is the cable of choice for RS-485/422 networks. Twisted pair cables tend to pick up noise and other electromagnetically induced voltages as common mode signals, which are effectively rejected by the differential receivers in these ICs. RS-485/422 are intended for network lengths up to 4000', but the maximum system data rate decreases as the transmission length increases. Devices operating at 10Mbps are limited to lengths of a few hundred feet, while the 250kbps versions can operate at full data rates with lengths in excess of 1000'. Proper termination is imperative, when using the 10Mbps devices, to minimize reflections. Short networks using the 250kbps versions need not be terminated, but, terminations are recommended unless power dissipation is an overriding concern. In point-to-point, or point-to-multipoint (single driver on bus) networks, the main cable should be terminated in its characteristic impedance (typically 120) at the end farthest from the driver. In multi-receiver applications, stubs connecting receivers to the main cable should be kept as short as possible. Multipoint (multi-driver) systems require that the main cable be terminated in its characteristic impedance at both ends. Stubs connecting a transceiver to the main cable should be kept as short as possible.
Receiver Features
These devices utilize a differential input receiver for maximum noise immunity and common mode rejection. Input sensitivity is 200mV, as required by the RS-422 and RS-485 specifications. Receiver input resistance surpasses the RS-422 spec of 4k, and meets the RS-485 "Unit Load" requirement of 12k minimum. Receiver inputs function with common mode voltages as great as 7V outside the power supplies (i.e., +12V and -7V), making them ideal for long networks where induced voltages are a realistic concern. All the receivers include a "fail-safe if open" function that guarantees a high level receiver output if the receiver inputs are unconnected (floating). Receivers easily meet the data rate supported by the corresponding driver. ISL8489E/91E receiver outputs are three-statable via the active low RE input.
Built-In Driver Overload Protection
As stated previously, the RS-485 spec requires that drivers survive worst case bus contentions undamaged. The ISL84XXE devices meet this requirement via driver output short circuit current limits, and on-chip thermal shutdown circuitry. The driver output stages incorporate short circuit current limiting circuitry which ensures that the output current never exceeds the RS-485 spec, even at the common mode voltage range extremes. Additionally, these devices utilize a foldback circuit which reduces the short circuit current, and thus the power dissipation, whenever the contending voltage exceeds either supply. In the event of a major short circuit condition, ISL84XXE devices also include a thermal shutdown feature that disables the drivers whenever the die temperature becomes excessive. This eliminates the power dissipation, allowing the die to cool. The drivers automatically reenable after the die temperature drops about 15 degrees. If the contention persists, the thermal shutdown/reenable cycle repeats until the fault is cleared. Receivers stay operational during thermal shutdown.
Driver Features
The RS-485/422 driver is a differential output device that delivers at least 1.5V across a 54 load (RS-485), and at least 2V across a 100 load (RS-422). The drivers feature low propagation delay skew to maximize bit width, and to minimize EMI. ISL8489E/91E driver outputs are threestatable via the active high DE input. The ISL8488E/89E driver outputs are slew rate limited to further reduce EMI, and to minimize reflections in unterminated or improperly terminated networks. Data rates on these slew rate limited versions are a maximum of 250kbps. Outputs of ISL8491E drivers are not limited, so faster output transition times allow data rates of at least 10Mbps.
ESD Protection
All pins on these devices include class 3 Human Body Model (HBM) ESD protection structures, but the RS-485 pins (driver outputs and receiver inputs) incorporate advanced structures allowing them to survive ESD events in excess of
FN6073.3
8
ISL8488E, ISL8489E, ISL8491E
15kV HBM. The RS-485 pins are particularly vulnerable to ESD damage because they typically connect to an exposed port on the exterior of the finished product. Simply touching the port pins, or connecting a cable, can cause an ESD event that might destroy unprotected ICs. These new ESD structures protect the device whether or not it is powered up, protect without allowing any latch-up mechanism to activate, and without degrading the RS-485 common mode range of -7V to +12V. This built-in ESD protection eliminates the need for board level protection structures (e.g., transient suppression diodes), and the associated, undesirable capacitive load they present.
Typical Performance Curves
90 80 DRIVER OUTPUT CURRENT (mA) 70 60 50 40 30 20 10 0 0 1 2 3
VCC = 5V, TA = 25C; Unless Otherwise Specified
3.6 3.4 3.2 3 2.8 2.6 2.4 2.2 2 -40 RDIFF = 54 RDIFF = 100
4
5
DIFFERENTIAL OUTPUT VOLTAGE (V)
-25
0
25
50
75
85
DIFFERENTIAL OUTPUT VOLTAGE (V)
TEMPERATURE (C)
FIGURE 6. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT VOLTAGE
FIGURE 7. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs TEMPERATURE
160 140 120 100 OUTPUT CURRENT (mA) 80 60 40 20 0 -20 -40 -60 ISL8491E Y OR Z = HIGH ICC (A) Y OR Z = LOW ISL8488E/89E ISL8491E
400 350 300 250 200 150 100 50 ISL8489E, DE = X, RE = X ISL8491E, DE = X, RE = X
-80 ISL8488E/89E -100 -120 -7 -6 -4 -2
ISL8488E -40 -25 0 25 TEMPERATURE (C) 50 75 85
0 2 4 6 OUTPUT VOLTAGE (V)
8
10
12
FIGURE 8. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT VOLTAGE
FIGURE 9. SUPPLY CURRENT vs TEMPERATURE
9
FN6073.3
ISL8488E, ISL8489E, ISL8491E Typical Performance Curves
750
VCC = 5V, TA = 25C; Unless Otherwise Specified (Continued)
250
700 PROPAGATION DELAY (ns)
tPLHY tPLHZ
200 |tPLHY - tPHLZ| 150 SKEW (ns)
650
600 tPHLY 550 tPHLZ 500
|tPHLY - tPLHZ| 100
50 |CROSS PT. OF Y & Z - CROSS PT. OF Y & Z| 0 -40
450 -40
-25
0
25 TEMPERATURE (C)
50
75
85
-25
0 25 TEMPERATURE (C)
50
75
85
FIGURE 10. DRIVER PROPAGATION DELAY vs TEMPERATURE (ISL8488E/89E)
30 28 PROPAGATION DELAY (ns)
FIGURE 11. DRIVER SKEW vs TEMPERATURE (ISL8488E/89E)
5
4 26 24 22 20 18 tPHLY 16 -40 -25 0 25 50 75 85 0 -40 SKEW (ns) tPLHY tPLHZ tPHLZ 3 |tPLHY - tPHLZ| 2 |tPHLY - tPLHZ|
1 |CROSSING PT. OF Y & Z - CROSSING PT. OF Y & Z| -25 0 25 50 75 85
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 12. DRIVER PROPAGATION DELAY vs TEMPERATURE (ISL8491E)
FIGURE 13. DRIVER SKEW vs TEMPERATURE (ISL8491E)
DRIVER INPUT (V)
RECEIVER OUTPUT (V)
RDIFF = 54, CL = 100pF DI 5 0 RO
RECEIVER OUTPUT (V)
RDIFF = 54, CL = 100pF DI 5 RO 0 5 0
5 0
DRIVER OUTPUT (V)
3 2 1 0
Z Y
DRIVER OUTPUT (V)
4
4 3 2 1 0 TIME (400ns/DIV) Y Z
TIME (400ns/DIV)
FIGURE 14. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL8488E/89E)
FIGURE 15. DRIVER AND RECEIVER WAVEFORMS, HIGH TO LOW (ISL8488E/89E)
FN6073.3
10
DRIVER INPUT (V)
ISL8488E, ISL8489E, ISL8491E Typical Performance Curves
RECEIVER OUTPUT (V)
VCC = 5V, TA = 25C; Unless Otherwise Specified (Continued)
DRIVER INPUT (V) RECEIVER OUTPUT (V) RDIFF = 54, CL = 100pF DI DRIVER INPUT (V)
RDIFF = 54, CL = 100pF DI
5 0
5 0
5 0
5 0
RO
RO
DRIVER OUTPUT (V)
DRIVER OUTPUT (V)
4 3 2 1 0 TIME (20ns/DIV) Z Y
4 3 2 1 0 TIME (20ns/DIV) Y Z
FIGURE 16. DRIVER AND RECEIVER WAVEFORMS, LOW TO HIGH (ISL8491E)
FIGURE 17. DRIVER AND RECEIVER WAVEFORMS, HIGH TO LOW (ISL8491E)
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 518 PROCESS: Si Gate BiCMOS
11
FN6073.3
ISL8488E, ISL8489E, ISL8491E Small Outline Plastic Packages (SOIC)
N INDEX AREA E -B1 2 3 SEATING PLANE -AD -CA h x 45o H 0.25(0.010) M BM
M8.15 (JEDEC MS-012-AA ISSUE C)
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE INCHES SYMBOL A
L
MILLIMETERS MIN 1.35 0.10 0.33 0.19 4.80 3.80 MAX 1.75 0.25 0.51 0.25 5.00 4.00 NOTES 9 3 4 5 6 7 8o Rev. 0 12/93
MIN 0.0532 0.0040 0.013 0.0075 0.1890 0.1497
MAX 0.0688 0.0098 0.020 0.0098 0.1968 0.1574
A1 B C D E

A1 0.10(0.004) C
e H h L N
0.050 BSC 0.2284 0.0099 0.016 8 0o 8o 0.2440 0.0196 0.050
1.27 BSC 5.80 0.25 0.40 8 0o 6.20 0.50 1.27
e
B 0.25(0.010) M C AM BS
NOTES: 1. Symbols are defined in the "MO Series Symbol List" in Section 2.2 of Publication Number 95. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. Dimension "E" does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. "L" is the length of terminal for soldering to a substrate. 7. "N" is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. The lead width "B", as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact.
12
FN6073.3
ISL8488E, ISL8489E, ISL8491E Small Outline Plastic Packages (SOIC)
N INDEX AREA H E -B1 2 3 SEATING PLANE -AD -CA h x 45o 0.25(0.010) M BM
M14.15 (JEDEC MS-012-AB ISSUE C)
14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE INCHES SYMBOL A
L
MILLIMETERS MIN 1.35 0.10 0.33 0.19 8.55 3.80 MAX 1.75 0.25 0.51 0.25 8.75 4.00 NOTES 9 3 4 5 6 7 8o Rev. 0 12/93
MIN 0.0532 0.0040 0.013 0.0075 0.3367 0.1497
MAX 0.0688 0.0098 0.020 0.0098 0.3444 0.1574
A1 B C D E e
C

A1 0.10(0.004)
e
B 0.25(0.010) M C AM BS
0.050 BSC 0.2284 0.0099 0.016 14 0o 8o 0.2440 0.0196 0.050
1.27 BSC 5.80 0.25 0.40 14 0o 6.20 0.50 1.27
H h L N
NOTES: 1. Symbols are defined in the "MO Series Symbol List" in Section 2.2 of Publication Number 95. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. Dimension "E" does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 5. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 6. "L" is the length of terminal for soldering to a substrate. 7. "N" is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. The lead width "B", as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 13
FN6073.3

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