Maxim Integrated MAX490ECSA+T, RS-422/RS-485 Transceiver, Full Duplex, 1/1 Drivers/Receivers, 2.5 Mbps, 4.75V–5.25V, 8-SOIC, 0°C to 70°C.
| Parameter | Value |
|---|---|
| Type | Transceiver |
| Mounting | Surface Mount |
| Supply voltage | 4.75V ~ 5.25V |
| Protocol | RS422, RS485 |
| Operating temperature | 0°C ~ 70°C |
| Duplex | Full |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Data rate | 2.5Mbps |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Receiver hysteresis | 70 mV |
| Number of drivers (Receivers) | 1/1 |
The MAX490ECSA+T is a single-channel RS-422/RS-485 transceiver in an 8-SOIC package, supporting full-duplex communication at data rates up to 2.5 Mbps.
It is not suited for outdoor telecom cabinets, engine bays, or freezer environments where the ambient can drop below freezing. For extended temperature needs, look at the industrial-grade variants in the same family.
The 8-SOIC footprint follows the JEDEC standard for SOIC-8 (3.90 mm body width). Standard land patterns from IPC-7351 or the manufacturer's datasheet apply. No special thermal pad or via array is required for this low-power transceiver.
The MAX490 is a full-duplex transceiver (separate driver and receiver pins for simultaneous transmit and receive), while the MAX485 is half-duplex (shared bus lines, direction control via DE/RE). Both operate at up to 2.5 Mbps and use the same 5 V supply, but they are not pin-compatible for full-duplex designs.