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PDF 74ACT899QC Data sheet ( Hoja de datos )
| Número de pieza | 74ACT899QC | |
| Descripción | 9-Bit Latchable Transceiver with Parity Generator/Checker | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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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
“feed-through” 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 Package Number
Package Description
74ACT899QC
V28A
28-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.450” Square
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
Pin Assignment for PCC
FACT™ is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS010637.prf
www.fairchildsemi.com
1 page  
APAR → ERRA
(BPAR → ERRB)
ZH, HZ
ZL, LZ
FIGURE 6.
FIGURE 7.
FIGURE 8.
SEL → BPAR
(SEL → APAR)
FIGURE 9.
5
www.fairchildsemi.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet 74ACT899QC.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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