74ACT161 Fairchild Semiconductor, 74ACT161 Datasheet

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74ACT161

Manufacturer Part Number
74ACT161
Description
Synchronous Presettable Binary Counter
Manufacturer
Fairchild Semiconductor
Datasheet

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© 1999 Fairchild Semiconductor Corporation
74AC161 • 74ACT161
Synchronous Presettable Binary Counter
General Description
The AC/ACT161 are high-speed synchronous modulo-16
binary counters. They are synchronously presettable for
application in programmable dividers and have two types
of Count Enable inputs plus a Terminal Count output for
versatility in forming synchronous multistage counters. The
AC/ACT161 has an asynchronous Master Reset input that
overrides all other inputs and forces the outputs LOW.
Ordering Code:
74AC161SC
74AC161SJ
74AC161MTC
74AC161PC
74ACT161SC
74ACT161SJ
74ACT161MTC
74ACT161PC
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
FACT
Order Number
is a trademark of Fairchild Semiconductor Corporation.
Package Number
MTC16
MTC16
IEEE/IEC
M16A
M16D
M16A
M16D
N16E
N16E
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
DS009931
www.DataSheet4U.com
Features
Connection Diagram
Pin Descriptions
I
Synchronous counting and loading
High-speed synchronous expansion
Typical count rate of 125 MHz
Outputs source/sink 24 mA
ACT161 has TTL-compatible inputs
CEP
CET
CP
MR
P
PE
Q
TC
CC
Pin Names
0
0
–P
–Q
reduced by 50%
Package Description
3
3
Count Enable Parallel Input
Count Enable Trickle Input
Clock Pulse Input
Asynchronous Master Reset Input
Parallel Data Inputs
Parallel Enable Inputs
Flip-Flop Outputs
Terminal Count Output
November 1988
Revised November 1999
Description
www.fairchildsemi.com

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74ACT161 Summary of contents

Page 1

... Synchronous Presettable Binary Counter General Description The AC/ACT161 are high-speed synchronous modulo-16 binary counters. They are synchronously presettable for application in programmable dividers and have two types of Count Enable inputs plus a Terminal Count output for versatility in forming synchronous multistage counters. The AC/ACT161 has an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW ...

Page 2

Functional Description The AC/ACT161 count in modulo-16 binary sequence. From state 15 (HHHH) they increment to state 0 (LLLL). The clock inputs of all flip-flops are driven in parallel through a clock buffer. Thus all changes of the Q outputs ...

Page 3

Block Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 3 www.fairchildsemi.com ...

Page 4

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

Page 5

DC Electrical Characteristics for ACT V Symbol Parameter V Minimum HIGH Level IH Input Voltage V Maximum LOW Level IL Input Voltage V Minimum HIGH Level OH Output Voltage V Maximum LOW Level OL Output Voltage I Maximum Input IN ...

Page 6

AC Operating Requirements for AC Symbol Parameter t Setup Time, HIGH or LOW Hold Time, HIGH or LOW Setup Time, HIGH or LOW ...

Page 7

AC Operating Requirements for ACT Symbol Parameter t Setup Time, HIGH or LOW Hold Time, HIGH or LOW Setup Time, HIGH or LOW ...

Page 8

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body www.fairchildsemi.com Package Number M16A 8 ...

Page 9

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16- Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16D 9 www.fairchildsemi.com ...

Page 10

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide www.fairchildsemi.com Package Number MTC16 10 ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right ...

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