74AC899

74AC899  54ACT 74ACT899 9-Bit Latchable Transceiver with Parity Generator Checker August 1994 74AC899  54ACT 74ACT899 9-Bit Latchable Transceiver with Parity Generator Checker General Description The ’AC ’ACT899 is a 9-bit to 9-bit parity transceiver with transparent latches The device can operate as a feedthrough transceiver or it can generate check parity from the 8-bit data busses in either direction The ’AC ’ACT899 feawww.DataSheet4U.com tures 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 Features Y Y Y Y Y Y Y Y Y Latchable transceiver with output sink of 24 mA Option to select generate parity and check or ‘‘feedthrough’’ data parity in directions A-to-B or B-to-A Independent latch enable 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 system applications in place of the ’280 May be used in system applications in place of the ’657 and ’373 (no need to change T R to check parity) 4 kV minimum ESD immunity Logic Symbol Connection Diagram Pin Assignment for PCC and LCC TL F 10637 – 1 TL F 10637 – 2 TRI-STATE is a registered trademark of National Semiconductor Corporation FACTTM is a trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 10637 RRD-B30M75 Printed in U S A Pin N...