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54ACT899 Datasheet

Part NameDescriptionManufacturer
54ACT899 9-Bit Latchable Transceiver with Parity Generator/Checker National-Semiconductor
National ->Texas Instruments National-Semiconductor
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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 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.

Features
■ 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

 

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