© 1999 Fairchild Semiconductor Corporation DS009494 www.fairchildsemi.com
April 1988
Revised July 1999
7
4F190 U
p
/
D
own
Deca
de
Count
er wit
h

Pr
eset and Rippl
e
Cl
ock
74F190
Up/Down Decade Counter with Preset and Ripple Clock
General Description
The 74F190 is a reversible BCD (8421) decade counter
featuring synchronous counting and asynchronous preset-
ting. The preset feature allows the 74F190 to be used in
programmable dividers. The Count Enable input, the Termi-
nal Count output and the Ripple Clock output make possi-
ble a variety of methods of implementing multistage
counters. In the counting modes, state changes are initi-
ated by the rising edge of the clock.
Features
a73 High-speed—125 MHz typical count frequency
a73 Synchronous counting
a73 Asynchronous parallel load
a73 Cascadable

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Order Number Package Number Package Description
74F190SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F190PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide