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PDF ( 数据手册 , 数据表 ) 74ACTQ843

零件编号 74ACTQ843
描述 Quiet Seriesa 9-Bit Transparent Latch with 3-STATE Outputs
制造商 Fairchild Semiconductor
LOGO Fairchild Semiconductor LOGO 


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74ACTQ843 数据手册, 描述, 功能
March 1990
Revised December 1998
74ACTQ843
Quiet Series9-Bit Transparent Latch
with 3-STATE Outputs
General Description
The ACTQ843 bus interface latch is designed to eliminate
the extra packages required to buffer existing latches and
provide extra data width for wider address/data paths. The
ACTQ843 utilizes Fairchild FACT Quiet Seriestechnol-
ogy to guarantee quiet output switching and improved
dynamic threshold performance. FACT Quiet Series fea-
tures GTOoutput control and undershoot corrector in
addition to a split ground bus for superior performance.
Features
s Guaranteed simultaneous switching noise level and
dynamic threshold performance
s Guaranteed pin-to-pin skew AC performance
s Inputs and outputs on opposite sides of package for
easy interface with microprocessors
s Improved latch-up immunity
s Outputs source/sink 24 mA
s ACTQ843 has TTL-compatible inputs
s Functionally and pin-compatible to AMD’s AM29843
s 3-STATE outputs for bus interfacing
Ordering Code:
Order Number Package Number
Package Description
74ACTQ843SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACTQ843SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
Pin Assignment for DIP and SOIC
Pin Descriptions
Pin Names
D0–D8
O0–O8
OE
LE
CLR
PRE
Description
Data Inputs
Data Outputs
Output Enable
Latch Enable
Clear
Preset
FACT, Quiet Series, FACT Quiet Seriesand GTOare trademarks of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS010689.prf
www.fairchildsemi.com







74ACTQ843 pdf, 数据表
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300” Wide
Package Number N24C
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
Fairchild does not assumeany responsibility for use of any circuitry described, no circuit patent licenses are impliedandFairchildreserves theright at any timewithout noticetochange saidcircuitry andspecifications.














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