The ADM3488/ADM3490/ADM3491 feature full-duplex com-munication, while the ADM3483/ADM3485 are designed for half-duplex communication.
The ADM3485/ADM3490/ADM3491 transmit at up to 10 Mbps. The receiver input impedance is 12 kΩ, allowing up to 32 transceivers to be connected on the bus. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. If a significant temperature increase is detected in the internal driver circuitry during fault conditions, then the thermal shutdown circuit forces the driver output into a high impedance state. If the inputs are unconnected (floating), the receiver contains a fail-safe feature that results in a logic high output state. The parts are fully specified over the commercial and industrial temperature ranges. The ADM3483/ADM3485/ADM3488/ADM3490ARZ-REEL7 are available in 8-lead SOIC_N; the ADM3491 is available in a 14-lead SOIC_N.
Feature
- Operate with 3.3 V supply
- Interoperable with 5 V logic
- EIA RS-485/RS-422 Compliant over Full Common-Range
- Data Rate Options: 10 Mbps
- Half and Full Duplex Options
- Up to 32 Transceivers on a Bus
- -7V to +12V Bus Common Mode Range
- Specified over –40°C to +85°C Temperature Range
- 8 ns skew
- Available in 8-Lead SOIC
Applications
- Low-Power RS-485 Applications
- Telecom
- Industrial Process Control
- HVAC
(Picture: Pinout)
