ISL83072EIUZA - 3.3V RS-485/RS-422 Transceiver, 8-MSOP | Renesas
N.º de pieza: ISL83072EIUZA ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.13 | $2,13 |
| 10 | $2.05 | $20,50 |
| 100 | $1.85 | $185,00 |
| 500 | $1.62 | $810,00 |
| 1.000 | $1.45 | $1.450,00 |
ISL83072EIUZA Descripción general
A RS-485/RS-422 transceiver is a differential line driver/receiver IC used for robust, long-distance, noise-immune serial communication over twisted-pair cables. RS-485 supports multi-drop (32+ node) half- or full-duplex networks up to 1200 meters at lower speeds, while RS-422 is a point-to-point (or multi-drop up to 10 nodes) full-duplex standard. Both standards use differential signalling for high noise immunity, making them foundational building blocks of industrial fieldbus, building automation, and motor-control networks. Within the signal-chain taxonomy, the ISL83072E sits as a layer-1 physical interface between an MCU UART and the wired bus medium.
Key specifications of the ISL83072EIUZA include ±15kV HBM ESD on RS-485 bus pins (driver output and receiver input), >7kV HBM ESD on all other pins, 3.0V to 3.6V supply operation, 1/8 unit load (allowing up to 256 transceivers on the bus), and low supply current. The driver features slew-rate-limited edges for reduced EMI, while the receiver offers full fail-safe to ensure a logic-high output under open-circuit, short-circuit, terminated, or floating bus conditions. The half-duplex topology shares a single differential pair between driver and receiver, reducing board area in multi-drop networks.
The IC is fabricated on a BiCMOS process that combines bipolar drive strength with CMOS logic, delivering low quiescent current while maintaining the bus drive capability required by the RS-485 standard. Hot-plug tolerance prevents latch-up and bus contention when cards are inserted into a live backplane, and the three-state enable pins (DE, RE) allow individual node isolation for service or programming. The 8-MSOP package provides a compact footprint with adequate thermal performance for industrial environments.
Typical applications include factory automation networks (Modbus RTU, Profibus DP), building automation (BACnet MS-TP, lighting controls), HVAC and access control, motor drive communication links, point-of-sale and weighing scales, and any multi-drop industrial fieldbus requiring robust 3.3V signalling. The half-duplex topology is well suited to bidirectional data exchange over a single twisted pair.
When designing with this device, observe the bus-termination and stub-length recommendations in the datasheet to preserve signal integrity at the maximum data rate. Use a 100Ω differential termination at each cable end and keep stub lengths below one-tenth of the driver rise time for clean edges. Enable hot-plug considerations by sequencing the supply and DE/RE pins to avoid contention during board insertion.
Alternativas directas para ISL83072EIUZA — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ISL83072EIUZA (mismo factor de forma y huella) — difiere en Package, RoHS Status, Function, Operating Temperature, Receiver Fail-Safe.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ISL83071EIUZA
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ISL83078EIUZA
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$0.92 / unidad
Ver hoja de datos →ISL83073EIUZA
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ISL83072EIUZA Especificaciones
| Función | Transceiver |
| Protocol | RS-422, RS-485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Velocidad de datos | 500 kbps (slew-rate limited, per family) |
| Tensión de alimentación | 3.0 V to 3.6 V (single 3.3V supply) |
| Bus ESD Protection (HBM) | ±15 kV (RS-485 bus pins) |
| Other-Pin ESD (HBM) | >7 kV |
| Unit Load | 1/8 unit load (up to 256 nodes) |
| Receiver Fail-Safe | Full fail-safe (open, short, terminated, floating) |
| Hot Plug Tolerant | Yes (Tx/Rx remain three-state during power-up on versions with enable pins) |
| Temperatura de funcionamiento | -40 °C to +85 °C (industrial) |
| Encapsulado | 8-MSOP |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de ISL83072EIUZA
| Pin 1 | RO — Receiver Output (logic-level, referenced to VCC) |
| Pin 2 | RE — Receiver Enable, active low (logic-low enables RO) |
| Pin 3 | DE — Driver Enable, active high (logic-high enables driver output) |
| Pin 4 | DI — Driver Input (logic-level, referenced to VCC) |
| Pin 5 | GND — Ground reference |
| Pin 6 | A — Non-inverting differential bus terminal (RS-485 A/Y) |
| Pin 7 | B — Inverting differential bus terminal (RS-485 B/Z) |
| Pin 8 | VCC — 3.3V supply input (3.0V to 3.6V) |
Aplicaciones típicas
ISL83072EIUZA es adecuado para 6 aplicacións: Modbus RTU Industrial Fieldbus, Building Automation (BACnet MS-TP / Lighting), Motor Drive Communication Link, Point-of-Sale and Weighing Scale Networks, Security and Access Control Panels, Solar Inverter and Energy Monitor Networks.
Modbus RTU Industrial Fieldbus
The ISL83072EIUZA's 500 kbps slew-rate-limited driver, 3.3V supply, and 1/8 unit load make it an ideal physical layer for Modbus RTU over RS-485 in PLCs, distributed I/O, and process control networks. It supports the full standard Modbus baud range (1.2k-115.2k) with margin for cable-induced distortion, while ±15kV bus ESD tolerates field handling. The half-duplex topology over a single twisted pair reduces wiring cost across plant floors.
Recomendado
Building Automation (BACnet MS-TP / Lighting)
BACnet MS-TP and DALI lighting networks use 1/2-duplex RS-485 multi-drop wiring where the ISL83072EIUZA's 1/8 unit load enables large node counts (up to 256) on a single bus. Its 3.3V supply pairs natively with low-power building controllers and ARM Cortex-M MCUs, while full fail-safe receivers ensure defined logic levels on idle or improperly terminated cables, eliminating bus lockup in HVAC and lighting control panels.
Recomendado
Motor Drive Communication Link
Variable-frequency drives, servo amplifiers, and stepper controllers frequently expose an RS-485 service port for parameter setting, firmware update, and diagnostics. The ISL83072EIUZA's ±15kV ESD survives cable handling in cabinet service bays, while its 3.3V supply avoids the level shifters required for 5V-only RS-485 parts in newer DSP and FPGA designs. The 500 kbps slew-limited edges keep EMI low inside the motor inverter enclosure.
Recomendado
Point-of-Sale and Weighing Scale Networks
Retail POS terminals, scales, and receipt printers commonly use RS-485 multi-drop to share a single backbone to the store controller, where the ISL83072EIUZA's 1/8 unit load allows many terminals on one bus. The 3.3V native supply matches modern POS SoCs, the small 8-MSOP footprint suits the compact terminal enclosures, and full fail-safe eliminates bus contention during the hot-plug of a new terminal in trading hours.
Recomendado
Security and Access Control Panels
Card readers, door controllers, and alarm panels communicate over RS-485 in a multi-drop daisy chain where the ISL83072EIUZA's 1/8 unit load supports large reader populations per controller. The ±15kV ESD rating protects against static discharge during reader installation, the -40 °C to +85 °C industrial temperature range covers outdoor panels, and the 3.3V supply aligns with modern ARM Cortex access-control MCUs.
Recomendado
Solar Inverter and Energy Monitor Networks
String inverters, battery monitors, and DC optimizers use RS-485 multi-drop for telemetry to data-acquisition gateways. The ISL83072EIUZA's industrial temperature rating tolerates outdoor inverter cabinets, the ±15kV ESD withstands installer handling, and the 1/8 unit load permits many modules per gateway. The 3.3V supply mates directly with inverter MPPT MCUs and C2000-class DSP controllers used in solar power conversion.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ISL83072EIUZA — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ISL83071EIUZA | ISL83078EIUZA | ISL83073EIUZA |
|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP - same | 8-MSOP - same | 8-MSOP - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Data Rate | 500 kbps (slew-limited) | 10 Mbps (high speed) | 500 kbps (slew-limited, full-duplex) | 500 kbps (slew-limited) |
| Duplex | Half | Half | Full | Half |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Bus ESD (HBM) | ±15 kV | ±15 kV | ±15 kV | ±15 kV |
| Unit Load | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/8 (256 nodes) | 1/4 (128 nodes) |
| Receiver Fail-Safe | Full fail-safe | Full fail-safe | Full fail-safe | Full fail-safe |
Diferenciadores clave
- ±15kV HBM bus ESD without external TVS (frente a ISL83071EIUZA)
- Lowest unit-load count in 8-MSOP half-duplex family (frente a ISL83073EIUZA)
- Slew-rate-limited edges reduce EMI (frente a ISL83071EIUZA)
Notas de diseño
Estimated: RS-485 bus signal integrity depends on a 100Ω differential termination at each end of the cable. For a 500 kbps slew-limited link, keep unterminated stub lengths below 50 mm to preserve edge fidelity. Place the ISL83072EIUZA close to the bus connector and route the A/B pair as a 100Ω differential microstrip above a continuous ground plane.
Do not leave DE and RE floating. The DE pin must be tied to GND (logic low) when the driver is not used, otherwise the device draws bus current and may cause contention on a multi-drop network. Similarly RE must be held low for receiver operation, or tied to a GPIO when receiver disable is needed. Hot-plug tolerant versions keep outputs three-state during power-up only on parts with active enable pin control.
The ISL83072EIUZA's slew-rate-limited driver edges (typical 1.5V/µs) minimise EMI at the cost of maximum data rate. For noise-sensitive installations adjacent to switching power converters, the slew-limited waveform keeps harmonics below ~25 MHz, which is below most industrial EMC pre-compliance test thresholds. If higher data rate is required, the ISL83071EIUZA high-speed variant is pin-compatible.
Información de cumplimiento
Per the Renesas product page, the ISL8307XE family is RoHS compliant and lead-free. The part is not AEC-Q100 qualified; for automotive applications, refer to Renesas automotive-grade RS-485 alternatives.
