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.
| Parameter | Value |
|---|---|
| Type | Transceiver |
| Mounting | Surface Mount |
| Voltage | 4.75V ~ 5.25V |
| Protocol | RS422, RS485 |
| Operating temperature | 0°C ~ 70°C |
| Duplex | Full |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Case | 14-SOIC (0.154\", 3.90mm Width) |
| Receiver hysteresis | 70 mV |
| Number of drivers (Receivers) | 1/1 |
The 4.75 V to 5.25 V supply means this part is strictly a 5 V bus transceiver.
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.
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.
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.
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.