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74ACT899CW Datasheet

  • 74ACT899CW

  • Registered Bus Transceiver, ACT Series, 1-Func, 9-Bit, True ...

  • 9頁

  • FAIRCHILD

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74ACT899 9-Bit Latchable Transceiver with Parity Generator/Checker
January 1990
Revised December 1998
74ACT899
9-Bit Latchable Transceiver with Parity
Generator/Checker
General Description
The ACT899 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 ACT899 features inde-
pendent latch enables for the A-to-B direction and the B-to-
A direction, a select pin for ODD/EVEN parity, and sepa-
rate error signal output pins for checking parity.
Features
s
Latchable transceiver with output sink of 24 mA
s
Option to select generate parity and check or
鈥渇eed-through鈥?data/parity in directions A-to-B or B-to-A
s
Independent latch enable 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 system applications in place of the 280
s
May be used in system applications in place of the 657
and 373 (no need to change T/R to check parity)
Ordering Code:
Order Number
74ACT899QC
Package Number
V28A
Package Description
28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450鈥?Square
Device also available in Tape and Reel. Specify by appending suffix letter 鈥淴鈥?to the ordering code.
Logic Symbol
Connection Diagram
Pin Assignment for PCC
FACT鈩?is a trademark of Fairchild Semiconductor Corporation.
漏 1999 Fairchild Semiconductor Corporation
DS010637.prf
www.fairchildsemi.com

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