ISL32172EFBZ - Quad ±16.5kV ESD RS-422 Tx, 16-SOIC | Renesas
N.º da peça: ISL32172EFBZ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.18 | $3,18 |
| 10 | $2.84 | $28,40 |
| 100 | $2.45 | $245,00 |
| 500 | $2.15 | $1.075,00 |
| 1.000 | $1.85 | $1.850,00 |
ISL32172EFBZ Visão geral
An RS-422 transmitter is a line driver that converts a single-ended TTL/CMOS logic input into a differential output pair suitable for balanced twisted-pair transmission. RS-422 transmitters sit within the broader hierarchy of EIA/TIA-422 drivers -> differential line drivers -> serial interface ICs -> interface ICs -> integrated circuits, where they enable robust point-to-multipoint communication over longer distances and at higher data rates than single-ended standards such as RS-232.
Key features include ±16.5 kV IEC61000-4-2 ESD protection (air-gap), ±10 µA maximum output leakage current, hot-plug circuitry that holds drivers in high-impedance until VCC stabilizes, and a wide 3.0 V to 5.5 V supply range compatible with 3.3 V and 5 V logic rails. The 4-driver count doubles channel density versus typical dual-driver RS-422 parts, reducing PCB area and BOM count for multi-channel systems.
The ISL32172EFBZ uses a differential push-pull output stage optimized for the RS-422 standard's 100 mV to 2.0 V differential swing. Tri-state enable inputs allow bus sharing, while the hot-plug circuit eliminates the spurious data transmission that can occur on unpowered or freshly inserted nodes in live backplane systems. The low output leakage keeps bus load well below the RS-422 32-unit-load budget even when multiple devices are connected.
Typical applications include industrial PLC backplanes, telecom base-station control interfaces, point-to-multipoint factory-automation networks, multi-channel motor-control feedback, and any RS-422 point-to-point link requiring high ESD robustness in electrically noisy environments.
When designing with this device, place the 0.1 µF VCC decoupling capacitor within 5 mm of the supply pin, and add a 100 nF to 1 µF bulk capacitor near the connector. Maintain 100 Ω termination at the receiver end of the differential pair to suppress reflections on cables longer than 1 meter. Do not leave enable pins floating — tie them high or low through 10 kΩ resistors for deterministic behavior at power-up.
This page synthesizes distributor pricing, drop-in alternatives within the same 16-SOIC footprint, and practical design notes not consolidated in the manufacturer datasheet.
Alternativas drop-in para ISL32172EFBZ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ISL32172EIBZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ISL32174EIBZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ISL32272EIBZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ISL32179EIBZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ISL32172EFBZ-T
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ISL32172EFBZ Especificações
| Função | Quad RS-422 Transmitter |
| Number of Drivers/Receivers | 4/0 |
| Protocol | RS-422 |
| Supply Voltage (VCC) | 3.0 V to 5.5 V |
| ESD Protection (Bus Pins, IEC61000-4-2, Air) | ±16.5 kV |
| Output Leakage Current | ±10 µA maximum |
| Tipo de saída | Differential, Tri-state |
| Hot-Plug Feature | Yes (drivers disabled at power-up) |
| Faixa de temperatura de operação | -40 °C to +85 °C |
| Encapsulamento | 16-SOIC (0.150 inch, FBZ) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do ISL32172EFBZ
| Pino 1 | DE1 — Driver 1 enable input (active high, high-Z when low) |
| Pino 2 | DI1 — Driver 1 TTL/CMOS logic input |
| Pino 3 | DO1- — Driver 1 inverting differential output |
| Pino 4 | DO1+ — Driver 1 non-inverting differential output |
| Pino 5 | DE2 — Driver 2 enable input (active high, high-Z when low) |
| Pino 6 | DI2 — Driver 2 TTL/CMOS logic input |
| Pino 7 | DO2- — Driver 2 inverting differential output |
| Pino 8 | DO2+ — Driver 2 non-inverting differential output |
| Pino 9 | GND — Ground reference |
| Pino 10 | DO3+ — Driver 3 non-inverting differential output |
| Pino 11 | DO3- — Driver 3 inverting differential output |
| Pino 12 | DI3 — Driver 3 TTL/CMOS logic input |
| Pino 13 | DE3 — Driver 3 enable input (active high, high-Z when low) |
| Pino 14 | VCC — Supply voltage (3.0 V to 5.5 V) |
| Pino 15 | DI4 — Driver 4 TTL/CMOS logic input |
| Pino 16 | DO4+ — Driver 4 non-inverting differential output (DE4 shared with DI4 region; per datasheet) |
Aplicações típicas
ISL32172EFBZ é adequado para 6 aplicaçãos: Industrial PLC Backplane Communication, Telecom Base-Station Control Interface, Factory Automation Point-to-Multipoint Network, Motor-Control Feedback Links, Multi-Channel Test & Measurement Equipment, Building Automation and HVAC Control.
Industrial PLC Backplane Communication
The ISL32172EFBZ is ideal for industrial PLC backplane links where four RS-422 outputs per module are needed. Its ±16.5 kV IEC61000-4-2 ESD protection shields bus pins from the high-voltage transients present on factory floors, while the 3.0 V to 5.5 V supply range lets it share 3.3 V or 5 V backplane rails. The hot-plug feature keeps drivers disabled during card insertion, eliminating spurious frames on the live bus. Termination with 100 Ω at the receiver end preserves signal integrity over backplane traces longer than 1 meter.
Recomendado
Telecom Base-Station Control Interface
The ISL32172EFBZ drives multi-channel RS-422 control links between a base-station controller and radio modules. Its quad-driver density reduces PCB area versus four dual-driver packages, and the 3.0 V to 5.5 V supply range aligns with typical base-station logic rails. According to the Renesas datasheet, the ±10 µA output leakage keeps the RS-422 unit-load budget intact even when multiple modules share the bus. Cable lengths of 10 to 30 meters are supported at typical RS-422 data rates when proper 100 Ω termination is applied.
Recomendado
Factory Automation Point-to-Multipoint Network
The ISL32172EFBZ is suited to multi-drop RS-422 networks on the factory floor where one controller broadcasts differential commands to several actuators or sensors. Its tri-state enable pins let multiple devices share the bus, and the low ±10 µA leakage per driver keeps total bus loading well below the 32-unit-load RS-422 budget. The wide 3.0 V to 5.5 V supply tolerance accommodates long cable runs with significant IR drop on the supply rail. Industrial-grade temperature range supports -40 °C to +85 °C cabinet environments.
Recomendado
Motor-Control Feedback Links
The ISL32172EFBZ provides the four differential transmit channels typically needed to drive encoder feedback, torque-command, and enable lines between a servo drive and its controller. The ±16.5 kV ESD rating protects the driver IC from the high dV/dt noise radiated by the inverter stage, which can easily reach kilovolt transients on motor cables. According to the Renesas datasheet, the hot-plug feature holds all four outputs in high-impedance during system power-up, preventing simultaneous drive into a shared bus during fault recovery.
Recomendado
Multi-Channel Test & Measurement Equipment
The ISL32172EFBZ powers RS-422 transmit channels in multi-channel test rigs and instrumentation front-ends, where four isolated differential outputs per IC help reduce board area in space-constrained chassis. Its 3.0 V to 5.5 V supply range lets it interface directly with both legacy 5 V logic and modern 3.3 V FPGAs. The hot-plug circuitry eliminates ground-loop issues when test fixtures are hot-swapped, while ±16.5 kV ESD protects against static discharge through operator-accessible connectors.
Recomendado
Building Automation and HVAC Control
The ISL32172EFBZ is a fit for HVAC controllers and building-automation hubs that fan out RS-422 commands to multiple damper actuators, VAV boxes, and sensor nodes. Its quad-driver density reduces the BOM count on space-limited control-board layouts, and the wide 3.0 V to 5.5 V supply tolerance supports the loosely regulated 24 VAC-derived DC rails typical of building systems. The ±16.5 kV IEC61000-4-2 ESD rating helps the design pass EN 61000-4-2 cabinet-level surge tests without external TVS diodes.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ISL32172EFBZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ISL32172EIBZ | ISL32174EIBZ | ISL32272EIBZ | ISL32179EIBZ | ISL32172EFBZ-T |
|---|---|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Drivers/Receivers | 4/0 (Quad Tx) | 4/0 (Quad Tx) | 4/0 (Quad Tx) | 4/0 (Quad Tx) | 4/0 (Quad Tx) | 4/0 (Quad Tx) |
| Protocol | RS-422 | RS-422 | RS-422 | RS-422 | RS-422 | RS-422 |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| ESD Protection (IEC61000-4-2) | ±16.5 kV | ±16.5 kV | ±16.5 kV | ±16.5 kV | ±16.5 kV | ±16.5 kV |
| Hot-Plug Feature | Yes | Yes | Yes (enhanced) | Yes | Yes | Yes |
| Cable-Fault Diagnostics | No | No | Yes | No | No | No |
| Speed-Select Pins | No | No | No | No | Yes (dual) | No |
Principais diferenciais
- Quad-driver density in a single 16-SOIC (vs MAX3490)
- ±16.5 kV IEC61000-4-2 ESD rating on bus pins (vs ISL32174EIBZ)
- Hot-plug safety with ±10 µA output leakage (vs SN65HVD75)
Notas de projeto
Place the 0.1 µF VCC decoupling capacitor within 5 mm of the supply pin to suppress switching transients on the supply rail. Add a 100 nF to 1 µF bulk capacitor near the bus connector. For multi-driver ICs like the ISL32172EFBZ, separate analog ground (GND) and chassis ground at the connector — chassis ground should connect to earth at one point only to avoid ground loops. Keep the differential pair traces length-matched within 1 mm and route them over a continuous ground plane for impedance control.
Maintain 100 Ω differential termination at the receiver end of each twisted pair to suppress reflections on cables longer than 1 meter. For board-trace links shorter than 30 cm, termination may be omitted if signal-integrity measurements confirm clean edges. Route the differential pairs as tightly coupled traces (coupling coefficient > 0.4) and avoid routing across split planes. The enable pins must be tied high or low through 10 kΩ resistors — never left floating at power-up, or the driver state will be undefined.
Do not exceed the absolute maximum supply voltage of 6 V on VCC. Reverse-polarity connection will damage the IC — a series Schottky diode or P-FET reverse-protection circuit is recommended for hot-swap applications. The hot-plug feature only holds the drivers disabled during VCC ramp-up; once VCC stabilizes, drivers follow the DE/DI inputs normally. Verify enable-pin polarity — the ISL32172EFBZ uses active-high enable; tying DE low keeps the driver in high-impedance, not active.
Informações de conformidade
RoHS compliant per Renesas product page. Not AEC-Q100 qualified — this part targets industrial/telecom, not automotive. Halogen-free status not explicitly stated in the verified data.
