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Analog Devices LTC491CS#TRPBF — DC-DC Power Modules
Analog Devices

LTC491CS#TRPBF RS422/RS485 Transceiver, Full Duplex, 14-SOIC

MPNLTC491CS#TRPBF
End of Life

Linear Technology LTC491CS#TRPBF, RS422/RS485 Transceiver, Full Duplex, 1/1 Drivers/Receivers, 4.75V–5.25V Supply, 70 mV Hysteresis, 0°C–70°C, Surface Mount 14-SOIC Package.

$10.07Ref. price · indicative, final on quote
LTC491CS#TRPBF datasheet
Packaging14-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

LTC491CS#TRPBF Technical Specifications
ParameterValue
TypeTransceiver
Mounting typeSurface Mount
Voltage4.75V ~ 5.25V
ProtocolRS422, RS485
Operating temperature0°C ~ 70°C
DuplexFull
PackageTape & Reel (TR); Cut Tape (CT)
Case14-SOIC (0.154\", 3.90mm Width)
Receiver hysteresis70 mV
Number of drivers (Receivers)1/1

Product details

Supply and temperature — fit for 5 V-only, indoor designs

The 4.75 V to 5.25 V supply means this part is strictly a 5 V bus transceiver. The 0°C to 70°C commercial grade covers office, lab, and light-industrial enclosures but is not rated for outdoor, under-hood, or unheated plant-floor environments. If your BOM calls for industrial temperature, the ADM485 family offers -40°C to 85°C coverage, though those are half-duplex parts.

Packaging note — Tape & Reel vs tube

The #TRPBF suffix designates Tape & Reel (TR) packaging, the standard for pick-and-place assembly. The same die is also available as LTC491CS#PBF in tube form for hand-assembly or low-volume builds.

Frequently asked questions

What is the difference between LTC491CS#TRPBF and LTC491CS#PBF?

The only difference is packaging: LTC491CS#TRPBF ships in Tape & Reel (TR) for automated assembly, while LTC491CS#PBF ships in tube form. The electrical specifications and temperature grade are identical.

Can LTC491CS#TRPBF replace LTC490?

The LTC490 is a full-duplex RS422/RS485 transceiver with similar pinout and function. LTC491CS#TRPBF is a direct functional replacement, but verify the receiver hysteresis (70 mV on this part) and supply range against your specific LTC490 variant's datasheet before committing the BOM.

When sourcing LTC491CS#TRPBF, what's the closest functional second-source?

The ADM488ABRZ is a full-duplex RS422/RS485 transceiver in a 14-SOIC package with similar supply voltage and receiver hysteresis. Note that ADM488ABRZ is rated for -40°C to 85°C and ships in tube packaging, so verify temperature grade and packaging fit for your application.