The ABT899 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.

The ABT899 features independent latch enables for the A-to-B direction and the B-to-A direction, a select pin for ODD/EVEN# parity, and separate error signal output pins for checking parity.

• Latchable transceiver with output sink of 64 mA
• 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-Adirections
• 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 the543 and 280
• May be used in system applications in place of the657 and 373 (no need to change T/R# to check parity)
• Guaranteed output skew
• Guaranteed multiple output switching specifications
• Output switching specified for both 50 pF and250 pF loads
• Guaranteed simultaneous switching noise level and dynamic threshold performance
• Guaranteed latchup protection
• High impedance glitch free bus loading during entire power up and power down cycle
• Nondestructive hot insertion capability
• Disable time less than enable time to avoid buscontention