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ISL4491EIBZ

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ISL4491EIBZ

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Part Number ISL4491EIBZ
Manufacturer Renesas Electronics America
Description IC TXRX RS485/422 LP HS 14-SOIC
Datasheet ISL4491EIBZ Datasheet
Package 14-SOIC (0.154", 3.90mm Width)
In Stock 3,356 piece(s)
Unit Price $ 1.1340 *
Lead Time Can Ship Immediately
Estimated Delivery Time Jul 15 - Jul 20 (Choose Expedited Shipping)
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Part Number # ISL4491EIBZ (Interface - Drivers, Receivers, Transceivers) is manufactured by Renesas Electronics America and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

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ISL4491EIBZ Specifications

ManufacturerRenesas Electronics America
CategoryIntegrated Circuits (ICs) - Interface - Drivers, Receivers, Transceivers
Datasheet ISL4491EIBZDatasheet
Package14-SOIC (0.154", 3.90mm Width)
Series-
TypeTransceiver
ProtocolRS422, RS485
Number of Drivers/Receivers1/1
DuplexFull
Receiver Hysteresis70mV
Data Rate15Mbps
Voltage - Supply4.5 V ~ 5.5 V
Operating Temperature-40°C ~ 85°C
Mounting TypeSurface Mount
Package / Case14-SOIC (0.154", 3.90mm Width)
Supplier Device Package14-SOIC

ISL4491EIBZ Datasheet

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FN6074 Rev.3.00 April 28, 2006 ISL4489E, ISL4491E ±15kV ESD Protected, 1/8 Unit Load, 5V, Low Power, High Speed and Slew Rate Limited, Full Duplex, RS-485/RS-422 Transceivers DATASHEETThe ISL4489E, ISL4491E are ESD protected, “fractional” unit load, 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). Rx inputs and Tx outputs present a “1/8 unit load” to the RS-485 bus, which allows a total of 256 transmitters and receivers on the network for large node count systems. 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 ISL4489E utilizes a slew rate limited driver which reduces EMI, and minimizes reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. Data rates up to 15Mbps are achievable by using the ISL4491E, which features higher slew rates. 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 • Pb-free Available as an Option (RoHS Compliant) (See Ordering Info) • RS-485 I/O Pin ESD Protection 15kV HBM - Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM • 1/8 Unit Load Allows up to 256 Devices on the Bus • High Data Rates (ISL4491E) . . . . . . . . . . . up to 15Mbps • Slew Rate Limited Version for Error Free Data Transmission (ISL4489E) • Very Low Quiescent Current: - 140A (ISL4489E) - 370A (ISL4491E) • -7V to +12V Common Mode Input Voltage Range • Three-State Rx and Tx Outputs • Full Duplex Pinout • Operates from a Single +5V Supply (10% Tolerance) • Current Limiting and Thermal Shutdown for driver Overload Protection 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 HALF/FULL DUPLEX HIGH ESD? NO. OF DEVICES ALLOWED ON BUS DATA RATE (Mbps) SLEW-RATE LIMITED? RECEIVER/ DRIVER ENABLE? QUIESCENT ICC (A) PIN COUNT ISL4489E Full Yes 256 0.25 Yes Yes 140 14 ISL4491E Full Yes 256 15 No Yes 370 14FN6074 Rev.3.00 Page 1 of 12 April 28, 2006

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ISL4489E, ISL4491EPinout ISL4489E, ISL4491E (SOIC) TOP VIEW Truth Tables Ordering Information PART NUMBER PART MARKING TEMP. RANGE (°C) PACKAGE PKG. DWG. # ISL4489EIB ISL4489EIB -40 to 85 14 Ld SOIC M14.15 ISL4489EIBZ (Note) 4489EIBZ -40 to 85 14 Ld SOIC (Pb-free) M14.15 ISL4491EIB ISL4491EIB -40 to 85 14 Ld SOIC M14.15 ISL4491EIBZ (Note) 4491EIBZ -40 to 85 14 Ld SOIC (Pb-free) M14.15 Add “-T” suffix for tape and reel. NOTE: Intersil Pb-free plus anneal 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-020. NC RO RE DE DI GND GND VCC NC A B Z Y NC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 D R TRANSMITTING INPUTS OUTPUTS RE DE DI Z Y X 1 1 0 1 X 1 0 1 0 X 0 X High-Z High-Z RECEIVING INPUTS OUTPUT RE DE A-B RO 0 X  +0.2V 1 0 X  -0.2V 0 0 X Inputs Open 1 1 X X High-Z Pin Descriptions PIN FUNCTION RO 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). RE Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. DE Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. DI 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. GND Ground connection. A 15kV HBM ESD Protected, Noninverting receiver input. B 15kV HBM ESD Protected, Inverting receiver input. Y 15kV HBM ESD Protected, Noninverting driver output. Z 15kV HBM ESD Protected, Inverting driver output. VCC System power supply input (4.5V to 5.5V). NC No Connection.FN6074 Rev.3.00 Page 2 of 12 April 28, 2006

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ISL4489E, ISL4491ETypical Operating Circuit ISL4489E, ISL4491E 0.1µF + D R 12 11 10 9 14 2 3 4 5 6, 7 VCC GND RO RE DE DI A B Y Z +5V 0.1µF + D R12 11 10 9 14 2 3 4 5 6, 7 VCC GND RO RE DE DI A B Y Z +5V RT RTFN6074 Rev.3.00 Page 3 of 12 April 28, 2006

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ISL4489E, ISL4491EAbsolute Maximum Ratings Thermal Information 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 Resistance (Typical, Note 1) JA (°C/W) 14 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . 128 Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C (Lead Tips Only) Operating Conditions Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C 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 = 25°C, Note 2 PARAMETER SYMBOL TEST CONDITIONS TEMP (°C) MIN TYP MAX UNITS DC CHARACTERISTICS Driver Differential VOUT (no load) VOD1 Full - - VCC V Driver Differential VOUT (with load) VOD2 R = 50 (RS-422) (Figure 1) Full 2 3 - V R = 27 (RS-485) (Figure 1) Full 1.5 2.3 5 V Change in Magnitude of Driver Differential VOUT for Complementary Output States VOD R = 27 or 50 (Figure 1) Full - 0.01 0.2 V Driver Common-Mode VOUT VOC R = 27 or 50 (Figure 1) Full - - 3 V Change in Magnitude of Driver Common-Mode VOUT for Complementary Output States VOC R = 27 or 50 (Figure 1) Full - 0.01 0.2 V Logic Input High Voltage VIH DE, DI, RE Full 2 - - V Logic Input Low Voltage VIL DE, DI, RE Full 0.8 - - V Logic Input Current IIN1 DI Full -2 - 2 A DE, RE Full -40 - 40 A Input Current (A, B) (Note 5) IIN2 DE = 0V, VCC = 0V or 4.5 to 5.5V VIN = 12V Full - - 130 A VIN = -7V Full -100 - - A Driver Three-State (high impedance) Output Current (Y, Z) IOZD -7V  VO  12V Full -100 - 100 A Receiver Differential Threshold Voltage VTH -7V  VCM  12V Full -0.2 - 0.2 V Receiver Input Hysteresis VTH VCM = 0V 25 - 70 - mV Receiver Output High Voltage VOH IO = -4mA, VID = 200mV Full 3.5 - - V Receiver Output Low Voltage VOL IO = -4mA, VID = 200mV Full - - 0.4 V Three-State (high impedance) Receiver Output Current IOZR 0.4V  VO  2.4V Full - - 1 A Receiver Input Resistance RIN -7V  VCM  12V Full 92 120 - k No-Load Supply Current (Note 3) ICC ISL4489E, DE, DI, RE = 0V or VCC Full - 140 190 A ISL4491E, DE, DI, RE = 0V or VCC Full - 370 460 A Driver Short-Circuit Current, VO = High or Low IOSD1 DE = VCC, -7V  VY or VZ  12V (Note 4) Full 35 - 250 mA Receiver Short-Circuit Current IOSR 0V  VO  VCC Full 7 - 85 mAFN6074 Rev.3.00 Page 4 of 12 April 28, 2006

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ISL4489E, ISL4491ESWITCHING CHARACTERISTICS (ISL4489E) Driver Input to Output Delay tPLH, tPHL RDIFF = 54, CL = 100pF (Figure 2) Full 250 400 2000 ns Driver Output Skew tSKEW RDIFF = 54, CL = 100pF (Figure 2) Full - 160 800 ns Driver Differential Rise or Fall Time tR, tF RDIFF = 54, CL = 100pF (Figure 2) Full 250 600 2000 ns Driver Enable to Output High tZH CL = 100pF, SW = GND (Figure 3) Full 250 1000 2000 ns Driver Enable to Output Low tZL CL = 100pF, SW = VCC (Figure 3) Full 250 860 2000 ns Driver Disable from Output High tHZ CL = 15pF, SW = GND (Figure 3) Full 300 660 3000 ns Driver Disable from Output Low tLZ CL = 15pF, SW = VCC (Figure 3) Full 300 640 3000 ns Receiver Input to Output Delay tPLH, tPHL Figure 4 Full 250 500 2000 ns Receiver Skew | tPLH - tPHL | tSKD Figure 4 25 - 60 - ns Receiver Enable to Output High tZH CL = 15pF, SW = GND (Figure 5) Full - 10 50 ns Receiver Enable to Output Low tZL CL = 15pF, SW = VCC (Figure 5) Full - 10 50 ns Receiver Disable from Output High tHZ CL = 15pF, SW = GND (Figure 5) Full - 10 50 ns Receiver Disable from Output Low tLZ CL = 15pF, SW = VCC (Figure 5) Full - 10 50 ns Maximum Data Rate fMAX Full 250 - - kbps SWITCHING CHARACTERISTICS (ISL4491E) Driver Input to Output Delay tPLH, tPHL RDIFF = 54, CL = 100pF (Figure 2) Full 13 24 40 ns Driver Output Skew tSKEW RDIFF = 54, CL = 100pF (Figure 2) Full - 3 10 ns Driver Differential Rise or Fall Time tR, tF RDIFF = 54, CL = 100pF (Figure 2) Full 5 12 20 ns Driver Enable to Output High tZH CL = 100pF, SW = GND (Figure 3) Full - 14 70 ns Driver Enable to Output Low tZL CL = 100pF, SW = VCC (Figure 3) Full - 14 70 ns Driver Disable from Output High tHZ CL = 15pF, SW = GND (Figure 3) Full - 44 70 ns Driver Disable from Output Low tLZ CL = 15pF, SW = VCC (Figure 3) Full - 21 70 ns Receiver Input to Output Delay tPLH, tPHL (Figure 4) Full 30 90 150 ns Receiver Skew | tPLH - tPHL | tSKD (Figure 4) 25 - 5 - ns Receiver Enable to Output High tZH CL = 15pF, SW = GND (Figure 5) Full - 9 50 ns Receiver Enable to Output Low tZL CL = 15pF, SW = VCC (Figure 5) Full - 9 50 ns Receiver Disable from Output High tHZ CL = 15pF, SW = GND (Figure 5) Full - 9 50 ns Receiver Disable from Output Low tLZ CL = 15pF, SW = VCC (Figure 5) Full - 9 50 ns Maximum Data Rate fMAX Full 15 - - Mbps ESD PERFORMANCE RS-485 Pins (A, B, Y, Z) Human Body Model 25 - 15 - kV All Other Pins 25 - >7 - kV 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 “1/8 unit load (1/8 UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus, so there can be 256 1/8 UL devices on a bus. Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = 25°C, Note 2 (Continued) PARAMETER SYMBOL TEST CONDITIONS TEMP (°C) MIN TYP MAX UNITSFN6074 Rev.3.00 Page 5 of 12 April 28, 2006

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ISL4489E, ISL4491ETest Circuits and Waveforms FIGURE 1. DRIVER VOD AND VOC FIGURE 2A. TEST CIRCUIT FIGURE 2B. MEASUREMENT POINTS FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES D DE DI VCC VOD VOC R R Z Y D DE DI VCC SIGNAL GENERATOR CL = 100pF RDIFF Z Y CL = 100pF OUT (Y) 3V 0V tPLH 1.5V1.5V VOH VOL 50% 50% tPHL OUT (Z) tPHL VOH VOL 50% 50% tPLH DIFF OUT (Y - Z) tR +VOD -VOD 90% 90% tF 10% 10% DI SKEW = |tPLH (Y or Z) - tPHL (Z or Y)|FN6074 Rev.3.00 Page 6 of 12 April 28, 2006

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ISL4489E, ISL4491EFIGURE 3A. TEST CIRCUIT FIGURE 3B. MEASUREMENT POINTS FIGURE 3. DRIVER ENABLE AND DISABLE TIMES FIGURE 4A. TEST CIRCUIT FIGURE 4B. MEASUREMENT POINTS FIGURE 4. RECEIVER PROPAGATION DELAY FIGURE 5A. TEST CIRCUIT FIGURE 5B. MEASUREMENT POINTS FIGURE 5. RECEIVER ENABLE AND DISABLE TIMES Test Circuits and Waveforms (Continued) D DE DI CL 500Z Y VCC GNDSW PARAMETER OUTPUT RE DI SW CL (pF) tHZ Y/Z X 1/0 GND 15 tLZ Y/Z X 0/1 VCC 15 tZH Y/Z X 1/0 GND 100 tZL Y/Z X 0/1 VCC 100 SIGNAL GENERATOR OUT (Y, Z) 3V 0V 1.5V1.5V VOH 0V 2.3V VOH - 0.5V tHZ OUT (Y, Z) VCC VOL 2.3V VOL + 0.5V tLZ DE OUTPUT HIGH OUTPUT LOW tZL tZH SIGNAL GENERATOR R RO RE A B +1.5V 15pF RO 3V 0V tPLH 1.5V1.5V VCC 0V 50% 50% tPHL A 1k VCC GNDSW PARAMETER DE A SW tHZ X +1.5V GND tLZ X -1.5V VCC tZH X +1.5V GND tZL X -1.5V VCC SIGNAL GENERATOR R RO RE A B 15pF RO 3V 0V 1.5V1.5V VOH 0V 1.5V VOH - 0.5V tHZ RO VCC VOL 1.5V VOL + 0.5V tLZ RE OUTPUT HIGH OUTPUT LOW tZL tZHFN6074 Rev.3.00 Page 7 of 12 April 28, 2006

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ISL4489E, ISL4491EApplication 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 point- to-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. 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 of 120k surpasses the RS-422 spec of 4k, and is more than eight times the RS-485 “Unit Load” requirement of 12k. Thus, these products are known as “one-eighth UL” transceivers, and there can be up to 256 of these devices on a network while still complying with the RS-485 loading spec. 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, and receiver outputs are three-statable via the active low RE input. 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, and driver outputs are three-statable via the active high DE input. The ISL4489E 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 ISL4491E drivers are not limited, so faster output transition times allow data rates of at least 15Mbps. 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 15Mbps 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 15Mbps 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. Built-In Driver Overload Protection As stated previously, the RS-485 spec requires that drivers survive worst case bus contentions undamaged. The ISL44XXE 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, ISL44XXE 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.FN6074 Rev.3.00 Page 8 of 12 April 28, 2006

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ISL4489E, ISL4491EESD 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 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 latchup 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 VCC = 5V, TA = 25°C; Unless Otherwise Specified FIGURE 6. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT VOLTAGE FIGURE 7. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs TEMPERATURE FIGURE 8. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT VOLTAGE FIGURE 9. SUPPLY CURRENT vs TEMPERATURE DIFFERENTIAL OUTPUT VOLTAGE (V) D R IV E R O U T P U T C U R R E N T ( m A ) 0 1 2 3 4 5 0 10 20 30 40 50 60 70 80 90 -40 0 50 85 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 TEMPERATURE (°C) D IF F E R E N T IA L O U T P U T V O LT A G E ( V ) -25 25 75 RDIFF = 54 RDIFF = 100 OUTPUT VOLTAGE (V) -7 -6 -4 -2 0 2 4 6 8 10 12 O U T P U T C U R R E N T ( m A ) -60 -40 -20 0 20 40 60 80 100 120 140 160 -80 -100 -120 Y OR Z = HIGH Y OR Z = LOW ISL4491E ISL4491E ISL4489E ISL4489E -40 0 50 85 TEMPERATURE (°C) I C C ( µ A ) -25 25 75 50 100 150 200 250 300 350 400 ISL4491E, DE = X, RE = X ISL4489E, DE = X, RE = XFN6074 Rev.3.00 Page 9 of 12 April 28, 2006

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June 30, 2020

I recently became very interested in electronics and I have used several of them. They work great.

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June 28, 2020

Very good and very fast . 100% safe company

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June 27, 2020

Packing good, very happy with goods, Very fast delivery, good service. Thanks

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June 16, 2020

Quality electronic components plus fast response.Thank you.

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June 13, 2020

Very user friendly to find part and specs. Easy to deal with the transaction for different payment types. Thanks!

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May 26, 2020

Your technical assistance and professionalism cannot be complained!

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May 24, 2020

Excellent, high quality product at a reasonable price. Timely delivery. Highly recommend product and vendor.

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May 22, 2020

I like doing business with Heisener. Get all the items I want. The website is well organized, intuitive, works correctly and pages load quickly. Well done!

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May 20, 2020

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May 18, 2020

This help solved the extra electricity flowing back.

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