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Texas Instruments DS8921ATM/NOPB — Sensors & Transducers
Texas Instruments

DS8921ATM/NOPB RS-485/RS-422 Transceiver

MPNDS8921ATM/NOPB
End of Life

Texas Instruments DS8921ATM/NOPB, full-duplex RS-485/RS-422 transceiver, 1 driver / 1 receiver, 8-SOIC package, 4.5V to 5.5V supply, -40°C to 85°C operation.

$2.08Ref. price · indicative, final on quote
DS8921ATM/NOPB datasheet
Packaging8-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

DS8921ATM/NOPB Technical Specifications
ParameterValue
TypeTransceiver
Mounting typeSurface Mount
Voltage4.5V ~ 5.5V
ProtocolRS422, RS485
Operating temperature-40°C ~ 85°C
DuplexFull
PackageTube
Case8-SOIC (0.154\", 3.90mm Width)
Receiver hysteresis70 mV
Number of drivers (Receivers)1/1

Product details

Type and function — what this transceiver does

The DS8921ATM/NOPB is a full-duplex transceiver supporting both RS-422 and RS-485 protocols.

Supply voltage and 3.3V compatibility

This part operates from a 4.5V to 5.5V supply rail. It is not designed for 3.3V logic — the receiver hysteresis of 70 mV is specified at 5V nominal. If your system runs on a 3.3V bus, you will need a level translator or a different transceiver rated for that supply.

Temperature grade and environment fit

The 8-SOIC package (0.154-inch body width) is a standard footprint that rework labs can handle with hot-air profiles typical for SOIC-8.

Frequently asked questions

What is the difference between DS8921ATM/NOPB and DS8921ATMX/NOPB?

The DS8921ATM/NOPB is supplied in a tube, while the DS8921ATMX/NOPB is typically supplied on tape-and-reel. Electrically they are identical — same transceiver, same 8-SOIC package, same ratings. Choose the tube variant for prototype or low-volume builds; pick the reel variant for automated pick-and-place assembly.