General Description

The 74F899 is a 9-bit to 9-bit parity transceiver with transparent latches. The device can operate as a feed-through transceiver or it can generate/check parity from the 8-bit data busses in either direction. It has a guaranteed current sinking capability of 24 mA at the A-bus and 64 mA at the B-bus.

Features

■ Latchable transceiver with output sink of 24 mA at the A-bus and 64 mA at the B-bus

■ Option to select generate parity and check or “feed-through” data/parity in directions A-to-B or B-to-A

■ Independent latch enables for A-to-B and B-to-A directions

■ Select pin for ODD/EVEN parity

■ ERRA and ERRB output pins for parity checking

■ Ability to simultaneously generate and check parity

■ May be used in systems applications in place of the 74F543 and 74F280

■ May be used in system applications in place of the 74F657 and 74F373 (no need to change T/R to check parity)