The ADM3488/ADM3490/ADM3491 feature full-duplex com-munication, while the ADM3483/ADM3485ARZ-REEL7 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/ADM3490 are available in 8-lead SOIC_N; the ADM3491 is available in a 14-lead SOIC_N.
Applications
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
2nA Supply Current in Shutdown Mode
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
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
