DATASHEET ISL32172E, ISL32272E, ISL32174E, ISL32179E FN6824 Rev 4.01 QUAD, 16.5kV ESD Protected, 3.0V to 5.5V, Low Power, RS-422 Transmitters Mar 19, 2020 The ISL32172E, ISL32272E, ISL32174E, and ISL32179E are Features 16.5kV IEC61000-4-2 ESD protected, 3.0V to 5.5V powered, IEC61000 ESD protection on RS-422 outputs 16.5kV QUAD transmitters for balanced communication using the RS- 422 standard. These drivers have very low output leakage - Class 3 ESD level on all other pins .12kV HBM currents (10A), so they present a low load to the RS-422 - High machine model ESD level on all pins . 700V bus. Wide supply range . 3.0V to 5.5V The driver (Tx) outputs are tri-statable and incorporate a hot Specified for +125C operation plug feature to keep them disabled during power-up and Available in industry standard pinouts (ISL32172E, power-down. The ISL32172E and ISL32272E have a common ISL32272E, ISL32174E) or in a space saving QFN EN/EN, the ISL32174E has a two channel EN12/EN34, and the (ISL32179E) with added features ISL32179E has a versatile combination of individual and group channel enables (see Table 1). Logic supply pin (V ) eases operation in mixed supply L systems (ISL32179E only) Only the ISL32179E driver can be slew-rate limited, and only at the data rate of 0.46Mbps. Drivers on the other versions are not User-selectable data rate (ISL32179E only) limited, so they can achieve 10Mbps or 32Mbps data rates. All Hot plug Tx outputs remain tri-stated during power-up and versions are offered in industrial and extended industrial power-down (-40C to +125C) temperature ranges. Low Tx leakage allows > 256 devices on the bus The ISL32179Es QFN package has a 50% smaller footprint High data rates up to 32Mbps compared to the TSSOP. The ISL32179E also features a logic supply pin (V ) that sets the switching points of the enable and Low quiescent supply current 0.8mA (maximum) L DI inputs to be compatible with a lower supply voltage in mixed - Low shutdown supply current 60A voltage systems. Two speed select pins allow the ISL32179E to Current limiting and thermal shutdown for driver overload be configured for 460kbps, 10Mbps, or 32Mbps data rates. protection Individual channel and group enable pins increase the ISL32179Es flexibility. Tri-statable Tx outputs 5V tolerant logic inputs when V 5V CC Related Literature Pb-free (RoHS compliant) For a full list of related documents, visit our website: Applications ISL32172E, ISL32272E, ISL32174E, and ISL32179E device pages Telecom equipment Motor controllers/encoders Programmable logic controllers Industrial/process control networks TABLE 1. SUMMARY OF FEATURES SLEW TX LOW DATA RATE HOT V ENABLE QUIESCENT POWER PIN L PART NUMBER FUNCTION RATE (Mbps) LIMITED PLUG PIN TYPE I (mA) SHUTDOWN COUNT CC ISL32172E 4 Tx 32 NO YES NO EN, EN <1 NO 16 ISL32272E 4 Tx 10 NO YES NO EN, EN <1 NO 16 ISL32174E 4 Tx 32 NO YES NO EN12, EN34 <1 NO 16 ISL32179E 4 Tx 32, 10, 0.46 SELECTABLE YES YES Individual <1 YES 24 and group enables FN6824 Rev 4.01 Page 1 of 20 Mar 19, 2020ISL32172E, ISL32272E, ISL32174E, ISL32179E Typical Operating Circuits (1 of 4 Channels Shown) 3.3V to 5V 3.3V to 5V 100nF 100nF 16 16 R R PU B R PU V V CC CC EN 12 A 2 2 Y 3 RO DI 1 V R FS T 12 EN B 1 3 Z EN 4 GND EN GND R B 8 4 8 ISL32X73E ISL32X72E FIGURE 1. NETWORK USING GROUP ENABLES 3.3V to 5V 3.3V to 5V 100nF 100nF 16 16 R B R PU V V CC CC EN12 4 A1 2 2 Y1 3 RO1 DI1 1 R V FS T 4 EN B1 1 3 Z1 GND GND R B 8 8 ISL32173E ISL32174E FIGURE 2. NETWORK USING PAIRED ENABLES 1.8V 3.3V to 5V 3.3V to 5V 2.5V 100nF 100nF 21 22 21 20 R R PU PU V V V V L CC CC L 9 22 SHDNEN SHDNEN 2, 3, 15, 16 R PU 15 EN1 - EN4 R B EN 14 V CC 4 EN EN EN 4 V CC MCU/ A1 24 24 Y UART 1 RO1 DI 23 MCU/ V R FS T UART 2 EN1 B1 23 1 Z GND GND GND GND R B 10 9 ISL32x77E ISL32179E Using individual channel enable pins and Using active group enable pins and configured configured for lowest shutdown supply current for lowest shutdown supply current Note: When using separate supplies, Note: When using separate supplies, V must be powered up before V V must be powered up before V CC L CC L FIGURE 3. NETWORK WITH V PIN FOR INTERFACING TO LOWER VOLTAGE LOGIC DEVICES L Note: To calculate the resistor values, see TB509. FN6824 Rev 4.01 Page 2 of 20 Mar 19, 2020