DATASHEET ISL8487E, ISL81487L, ISL81487E FN6051 Rev.8.00 15kV ESD Protected, 1/8 Unit Load, 5V, Low Power, High Speed or Slew Rate Sep 20, 2018 Limited RS-485/RS-422 Transceivers The ISL8487E, ISL81487L, and ISL81487E RS-485/RS-422 Features devices are ESD protected, fractional unit load (UL), RS-485 I/O pin ESD protection . 15kV HBM BiCMOS, 5V powered, single transceivers that meet both - Class 3 ESD level on all other pins . >7kV HBM the RS-485 and RS-422 standards for balanced communication. Each driver output/receiver input is Fractional unit load allows up to 256 devices on the bus protected against 15kV ESD strikes without latch-up. Unlike Specified for 10% tolerance supplies competitive devices, this device family is specified for 10% tolerance supplies (4.5V to 5.5V). High data rate version (ISL81487E) . up to 5Mbps Slew rate limited versions for error free data All devices present a 1/8 unit load to the RS-485 bus, which transmission (ISL8487E, ISL81487L) .up to 250kbps allows up to 256 transceivers on the network for large node count systems (for example, process automation and remote Low current shutdown mode (except ISL81487E) . 0.5A meter reading systems). In a remote utility meter reading Low quiescent supply current: system, individual utility meter readings (in apartments, for - ISL8487E, ISL81487L . 145A (maximum) example) are routed to a concentrator with an RS-485 - ISL81487E 420A (maximum) network, so the high allowed node count minimizes the number of repeaters required to network all the meters. Data -7V to +12V common mode input voltage range for all meters is then read out from the concentrator from a Three state Rx and Tx outputs single access port or a wireless link. 30ns propagation delays, 5ns skew (ISL81487E) Slew rate limited drivers on the ISL8487E and ISL81487L reduce EMI and minimize reflections from improperly Half duplex pinouts terminated transmission lines or unterminated stubs in Operate from a single +5V supply (10% tolerance) multidrop and multipoint applications. Data rates up to Current limiting and thermal shutdown for driver overload 250kbps are achievable with these devices. protection Data rates up to 5Mbps are achievable by using the Pin compatible replacements for: MAX487E, (ISL8487E) ISL81487E, which features higher slew rates. LTC1487, ADM1487 (ISL81487L) MAX1487E, ST485ER The receiver (Rx) inputs feature a fail-safe if open design, (ISL81487E) which ensures a logic high Rx output if Rx inputs are floating. Pb-free plus anneal available (RoHS compliant) The driver (Tx) outputs are short-circuit protected, even for Applications voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to High node count networks prevent damage if power dissipation becomes excessive. Automated utility meter reading systems The half duplex devices multiplex the Rx inputs and Tx Factory automation outputs to allow transceivers with Rx and Tx disable functions in 8 lead packages. Security networks Building environmental control systems Related Literature Industrial/process control networks For a full list of related documents, visit our website: ISL8487E, ISL81487L, and ISL81487E product pages TABLE 1. SUMMARY OF FEATURES PART HALF/FULL NO. OF DEVICES DATA RATE SLEW RATE RECEIVER/ QUIESCENT LOW POWER PIN NUMBER DUPLEX ALLOWED ON BUS (Mbps) LIMITED DRIVER ENABLE I (A) SHUTDOWN COUNT CC ISL8487E Half 256 0.25 Yes Yes 120 Yes 8 ISL81487L Half 256 0.25 Yes Yes 120 Yes 8 ISL81487E Half 256 5 No Yes 350 No 8 FN6051 Rev.8.00 Page 1 of 16 Sep 20, 2018ISL8487E, ISL81487L, ISL81487E Typical Operating Circuits 9 9 5 5 9 9 && && 5 % < 9 5 5 % = 5 % To calculate the resistor values, refer to TB509. Ordering Information TAPE AND REEL PART NUMBER () PART MARKING TEMP. RANGE (C) (UNITS) (Note 1) PACKAGE PKG. DWG. ISL8487EIBZ 8487EIBZ -40 to +85 - 8 Ld SOIC M8.15 (Pb-free) ISL8487EIBZ-T 8487EIBZ -40 to +85 2.5k 8 Ld SOIC M8.15 (Pb-free) ISL8487EIPZ (not 8487EIPZ -40 to +85 - 8 Ld PDIP E8.3 recommended for new designs, (Pb-free, Note 4) recommended replacement ISL81487LIPZ) ISL81487LIBZ 81487LIBZ -40 to +85 - 8 Ld SOIC M8.15 (Pb-free) ISL81487LIBZ-T 81487LIBZ -40 to +85 2.5k 8 Ld SOIC M8.15 (Pb-free) ISL81487LIPZ 81487LIPZ -40 to +85 - 8 Ld PDIP E8.3 (Pb-free, Note 4) ISL81487EIBZ 81487EIBZ -40 to +85 - 8 Ld SOIC M8.15 (Pb-free) ISL81487EIBZ-T 81487EIBZ -40 to +85 2.5k 8 Ld SOIC M8.15 (Pb-free) ISL81487EIPZ ISL81487EIPZ -40 to +85 - 8 Ld PDIP E8.3 (Pb-free, Note 4) NOTES: 1. Refer to TB347 for details about reel specifications. 2. 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. 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 3. For Moisture Sensitivity Level (MSL), see the ISL8487E, ISL81487L, and ISL81487E product information pages. For more information about MSL, see TB363. 4. Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications. FN6051 Rev.8.00 Page 2 of 16 Sep 20, 2018 *1 *1 , , % = ( ( 7 7 )6 5( 5( < 52 52 38 38 Q) Q)