74F161A Datasheet, PDF (1/8 Pages) NXP Semiconductors – 4-bit binary counter

April 1988
Revised September 2000
74F161A • 74F163A
Synchronous Presettable Binary Counter
General Description
The 74F161A and 74F163A are high-speed synchronous
modulo-16 binary counters. They are synchronously pre-
settable for application in programmable dividers and have
two types of Count Enable inputs plus a Terminal Count
output for versatility in forming synchronous multi-stage
counters. The 74F161A has an asynchronous Master-
Reset input that overrides all other inputs and forces the
outputs LOW. The 74F163A has a Synchronous Reset
input that overrides counting and parallel loading and
allows the outputs to be simultaneously reset on the rising
edge of the clock. The 74F161A and 74F163A are high-
speed versions of the 74F161 and 74F163.
Features
s Synchronous counting and loading
s High-speed synchronous expansion
s Typical count frequency of 120 MHz
Ordering Code:
Order Number Package Number
Package Description
74F161ASC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F161ASJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F161APC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74F163ASC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F163ASJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F163APC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
74F161A
74F163A
© 2000 Fairchild Semiconductor Corporation DS009486
www.fairchildsemi.com