74ACTQ843 Fairchild Semiconductor, 74ACTQ843 Datasheet

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74ACTQ843

Manufacturer Part Number
74ACTQ843
Description
Quiet Seriesa 9-Bit Transparent Latch with 3-STATE Outputs
Manufacturer
Fairchild Semiconductor
Datasheet
© 1999 Fairchild Semiconductor Corporation
74ACTQ843SC
74ACTQ843SPC
74ACTQ843
Quiet Series
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 Series
ogy to guarantee quiet output switching and improved
dynamic threshold performance. FACT Quiet Series fea-
tures GTO
addition to a split ground bus for superior performance.
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
FACT , Quiet Series , FACT Quiet Series
Order Number
output control and undershoot corrector in
Package Number
M24B
N24C
9-Bit Transparent Latch
and GTO
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300” Wide
DS010689.prf
are trademarks of Fairchild Semiconductor Corporation.
technol-
Features
Connection Diagram
Pin Descriptions
Guaranteed simultaneous switching noise level and
dynamic threshold performance
Guaranteed pin-to-pin skew AC performance
Inputs and outputs on opposite sides of package for
easy interface with microprocessors
Improved latch-up immunity
Outputs source/sink 24 mA
ACTQ843 has TTL-compatible inputs
Functionally and pin-compatible to AMD’s AM29843
3-STATE outputs for bus interfacing
Package Description
D
O
OE
LE
CLR
PRE
0
0
–D
–O
Pin Assignment for DIP and SOIC
Pin Names
8
8
Data Inputs
Data Outputs
Output Enable
Latch Enable
Clear
Preset
March 1990
Revised December 1998
Description
www.fairchildsemi.com

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74ACTQ843 Summary of contents

Page 1

... 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. ...

Page 2

Functional Description The ACTQ843 consists of nine D-type latches with 3- STATE outputs. The flip-flops appear transparent to the data when Latch Enable (LE) is HIGH. This allows asyn- chronous operation, as the output transition follows the data in transition. ...

Page 3

Absolute Maximum Ratings Supply Voltage ( Input Diode Current ( 0. 0. Input Voltage ( Output Diode Current ( ...

Page 4

DC Electrical Characteristics Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: DIP package. Note 5: Max number of outputs defined ...

Page 5

AC Operating Requirements Symbol Parameter t Setup Time, HIGH or LOW Hold Time, HIGH or LOW Pulse Width, HIGH W t PRE Pulse Width, LOW W t ...

Page 6

FACT Noise Characteristics The setup of a noise characteristics measurement is critical to the accuracy and repeatability of the tests. The following is a brief description of the setup used to measure the noise characteristics of FACT. Equipment: Hewlett Packard ...

Page 7

Physical Dimensions inches (millimeters) unless otherwise noted 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body Package Number M24B 7 www.fairchildsemi.com ...

Page 8

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300” Wide LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN ...

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