74F191SCX_NL

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74F191SCX_NL 数据手册

April 1988

Revised July 1999

74F191

Up/Down Binary Counter with Preset and Ripple Clock

General Description

Features

The 74F191 is a reversible modulo-16 binary counter fea-

turing synchronous counting and asynchronous presetting.

The preset feature allows the 74F191 to be used in pro-

grammable dividers. The Count Enable input, the Terminal

Count output and Ripple Clock output make possible a

variety of methods of implementing multistage counters. In

the counting modes, state changes are initiated by the ris-

ing edge of the clock.

■ High-Speed—125 MHz typical count frequency

■ Synchronous counting

■ Asynchronous parallel load

■ Cascadable

Ordering Code:

Order Number Package Number

Package Description

74F191SC

74F191SJ

74F191PC

M16A

M16D

N16E

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

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.

Logic Symbols

Connection Diagram

IEEE/IEC

DS009495

www.fairchildsemi.com

12 3 4 5 6 7

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型号	品牌	描述	获取价格	数据表
74F191SDC	FAIRCHILD	Binary Counter, F/FAST Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional,	获取价格
74F191SJ	NSC	Up/Down Binary Counter with Preset and Ripple Clock	获取价格
74F191SJ	FAIRCHILD	Up/Down Binary Counter with Preset and Ripple Clock	获取价格
74F191SJ	TI	F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDSO16, 0.3	获取价格
74F191SJCQB	FAIRCHILD	Up/Down Binary Counter with Preset and Ripple Clock	获取价格
74F191SJCX	FAIRCHILD	Up/Down Binary Counter with Preset and Ripple Clock	获取价格