The MAX1481/MAX1484/MAX1485/MAX1486 provide software-selectable, half-/full-duplex, low-power, slew- rate-limited, and high-speed (12Mbps) RS-485/RS-422 operation in a 10-pin µMAX® package—the smal- lest 10-pin package available.
The MAX1481, MAX1484, MAX1485, and MAX1486 are 10‑pin µMAX package transceivers that provide software‑selectable half‑ or full‑duplex operation, slew‑rate limiting, and low‑power consumption for RS‑485/RS‑422 communication up to 12 Mbps. Each device contains one driver and one receiver, draws about 300 µA at 5 V, and the MAX1481 offers a shutdown mode with only 0.1 µA current.
Key features include a 1/8‑unit‑load receiver input impedance allowing up to 256 devices on a single bus, reduced EMI through slew‑rate limiting, and operation over a wide temperature range. The devices are suited for hand‑held equipment, battery‑powered systems, industrial‑control LANs, and EMI‑sensitive applications.
| Full‑duplex data rate (MAX1481) | 0.250 Mbps |
|---|---|
| Full‑duplex data rate (MAX1484) | 12 Mbps |
| Quiescent current (all devices) | 300 µA |
| Shutdown current (MAX1481) | 0.1 µA |
| Receiver input impedance | 1/8‑unit‑load (≈96 kΩ) |
| Maximum transceivers on bus | 256 |
| Operating temperature range (MAX1481) | 0 °C to +70 °C |
Up to 256 transceivers can be connected on a single RS‑485/RS‑422 bus.
The MAX1481 shutdown current is typically 0.1 µA.
They are offered in a 10‑pin µMAX package, the smallest 10‑pin package available.
The MAX1484 supports up to 12 Mbps full‑duplex operation.