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SN65HVD74D

SN65HVD74D RS-485/RS-422 Transceiver, 20 Mbps, 8-SOIC

MPNSN65HVD74D
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Texas Instruments SN65HVD74D RS-485/RS-422 transceiver, full duplex, 1 driver/1 receiver, 20 Mbps data rate, 3V to 3.6V supply, -40°C to 125°C, 8-SOIC package.

$4.8400Ref. price · indicative, final on quote
Texas Instruments SN65HVD74D datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN65HVD74D specifications
ParameterValue
TypeTransceiver
MountingSurface Mount
Supply voltage3V ~ 3.6V
ProtocolRS422, RS485
Operating temperature-40°C~125°C
DuplexFull
PackageTube
Data rate20Mbps
Case8-SOIC (0.154\", 3.90mm Width)
Receiver hysteresis70 mV
Number of drivers (Receivers)1/1

Product details

20 Mbps full-duplex RS-485 transceiver for industrial links

It handles signaling at 20 Mbps, which puts it in the high-speed tier for RS-485 — fast enough for Profibus, Modbus TCP gateway backplanes, or servo drive encoder links where the bus isn't the bottleneck. The 70 mV of receiver hysteresis gives you noise margin on long cable runs without external biasing resistors.

The full industrial temperature span means you don't derate for ambient heat soak or cold-start conditions. Surface-mount 8-SOIC footprint keeps the board area small and matches standard RS-485 transceiver layouts.

Frequently asked questions

Does SN65HVD74D work at 3.3V supply?

Yes. No level shifting needed if the rest of the logic runs at 3.3V.

Is SN65HVD74D compatible with 5V logic?

The supply is 3V to 3.6V, so the transceiver itself runs on 3.3V. Driving the DI pin from a 5V logic output exceeds the absolute maximum ratings — use a level translator or a resistive divider if the controller side is 5V.

What is the equivalent or replacement for SN65HVD74D?

The SN65HVD74D is a full-duplex RS-485 transceiver in an 8-SOIC package running at 20 Mbps on a 3.3V supply. Pin-compatible alternatives within the same TI family include the SN65HVD72D (half-duplex, lower data rate) and the SN65HVD75D (half-duplex, 20 Mbps). For a full-duplex drop-in, the SN65HVD74 is the direct match — verify the suffix for package and temperature grade.