74ABT899 Datasheet, PDF(1/16 Page) NXP Semiconductors – 9-bit dual latch transceiver with 8-bit parity generator/checker 3-State

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74ABT899 Datasheet, PDF (1/16 Pages) NXP Semiconductors – 9-bit dual latch transceiver with 8-bit parity generator/checker 3-State

November 1992

Revised January 1999

74ABT899

9-Bit Latchable Transceiver

with Parity Generator/Checker

General Description

The ABT899 is a 9-bit to 9-bit parity transceiver with trans-

parent 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.

Features

s Latchable transceiver with output sink of 64 mA

s Option to select generate parity and check or

âfeed-throughâ data/parity in directions A-to-B or B-to-A

s Independent latch enables for A-to-B and B-to-A

directions

s Select pin for ODD/EVEN parity

s ERRA and ERRB output pins for parity checking

s Ability to simultaneously generate and check parity

s May be used in systems applications in place of the

543 and 280

s May be used in system applications in place of the

657 and 373 (no need to change T/R to check parity)

s Guaranteed output skew

s Guaranteed multiple output switching specifications

s Output switching specified for both 50 pF and

250 pF loads

s Guaranteed simultaneous switching noise level and

dynamic threshold performance

s Guaranteed latchup protection

s High impedance glitch free bus loading during entire

power up and power down cycle

s Nondestructive hot insertion capability

s Disable time less than enable time to avoid bus

contention

Ordering Code:

Order Number Package Number

Package Description

74ABT899CSC

M28B

28-Lead Small Outline Integrated Circuit (SOIC), MS-013, 0.300â Wide Body

74ABT899CMSA

MSA28

28-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide

74ABT899CQC

V28A

28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450â Square

Devices also available in Tape and Reel. Specify by appending suffix letter âXâ to the ordering code.

Connection Diagrams

Pin Assignment

for PLCC

Pin Assignment for

SOIC and SSOP

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