Out in Front: December 7, 1995

Exar’s three-transmitter, three-receiver XR-T3590 V.35 interface provides transmit-data, receive-data, and clock functions. The interface simplifies incorporating full loop-back for diagnostics into a link. When you set the appropriate code on the ICs’ select lines, the transceiver provides a mirrored loop-back; it then sends the data that it receives on the adjacent channel to this mirrored loop-back. The loop-back function requires no external components.

The transceiver supports a maximum data rate of 10 Mbps for distances as long as 100m and consumes 540 mW from ±5V. In shutdown mode, current consumption drops to less than 300 µ. The transmitters are short-circuit-protected, and you can disable drivers as a group, receivers as a group, or both groups. The 24-lead DIP or SOIC device costs $6.08 (1000); a demonstration board with three source- and input-termination resistors per I/O is also available. -- by Bill Schweber

Exar Corp, San Jose, CA. (408) 434-6400, ext 3804.