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Renesas Electronics ISL3179EIBZ-T7A — Sensors & Transducers

ISL3179EIBZ-T7A Renesas Half-Duplex RS-485 Transceiver 40

MPNISL3179EIBZ-T7A
End of Life

Renesas ISL3179EIBZ-T7A, half-duplex RS-422/RS-485 transceiver, 40 Mbps data rate, 3 V to 3.6 V supply, 1/1 driver/receiver, 28 mV receiver hysteresis, -40°C to 85°C, 8-SOIC package.

$4.86Ref. price · indicative, final on quote
Renesas Electronics ISL3179EIBZ-T7A datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

ISL3179EIBZ-T7A specifications
ParameterValue
TypeTransceiver
MountingSurface Mount
Voltage3V ~ 3.6V
ProtocolRS422, RS485
Operating temperature-40°C ~ 85°C
DuplexHalf
PackageTape & Reel (TR); Cut Tape (CT)
Data rate40Mbps
Case8-SOIC (0.154\", 3.90mm Width)
Receiver hysteresis28 mV
Number of drivers (Receivers)1/1

Product details

40 Mbps half-duplex RS-485 transceiver for 3.3 V industrial buses

The ISL3179EIBZ-T7A is a single-channel half-duplex transceiver supporting RS-422 and RS-485 protocols at a data rate of 40 Mbps — fast enough for Profibus, Modbus RTU at high baud rates, or backplane interconnects where the bus length stays under a few metres. The 28 mV receiver hysteresis cleans up noisy differential signals without external filtering. The 1/1 driver/receiver count suits point-to-point or multi-drop nodes where each device talks one at a time.

Industrial temperature grade and 8-SOIC package

Compared to the full-duplex RS-232 ICL3221EIAZ-T (250 kbps, 500 mV hysteresis), this part trades a higher data rate and differential signaling for half-duplex bus architecture. The RAA7884QR4GSP#AB0 is a 4-channel receiver with 80 Mbps capability and 125°C rating, but it lacks a driver — a different system role entirely.

Renesas lists the ISL3179EIBZ-T7A as Active with no announced end-of-life. ROHS3 compliance is confirmed.

Frequently asked questions

Is ISL3179EIBZ-T7A compatible with 3.3V logic levels?

It is not 5 V tolerant; driving the supply above 3.6 V or applying 5 V logic inputs violates the absolute maximum ratings.

Can ISL3179EIBZ-T7A be used as a direct replacement for MAX485?

Not directly. The MAX485 is a 5 V part; the ISL3179EIBZ-T7A requires a 3.3 V supply. Both are half-duplex RS-485 transceivers in 8-SOIC, but the supply voltage difference means the board's power rail must be changed. The ISL3179EIBZ-T7A also runs at 40 Mbps versus the MAX485's typical 10 Mbps limit.