Maxim Integrated MAX490CSA+T, RS-422/RS-485 Transceiver, Full Duplex, 1/1 Driver/Receiver, 2.5 Mbps, 4.75 V to 5.25 V Supply, 0°C to 70°C, 8-SOIC.
| 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 70 mV receiver hysteresis is a practical feature on long cable runs or in electrically noisy environments. It prevents the receiver from chattering on slow edges or when the bus is idle and unterminated. For a retrofit into an existing plant-floor network with unknown cable quality, this hysteresis buys you margin without adding external filtering.
The MAX490CSA+T supports a data rate of 2.5 Mbps, which covers most industrial fieldbus protocols including Modbus RTU at 115.2 kbps.
No. The MAX490CSA+T requires a 4.75 V to 5.25 V supply. It will not operate on a 3.3 V rail — use a 3.3 V-rated RS-485 transceiver such as the MAX3485 family for 3.3 V designs.