Datasheet > MM74HC161_03

MM74HC161_03

更新时间： 2024-01-04 09:20:27

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		计数器
页数	文件大小	规格书
9页	108K
描述
Synchronous Binary Counter with Asynchronous Clear Synchronous Binary Counter with Synchronous Clear

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MM74HC161_03 数据手册

September 1983

Revised December 2003

MM74HC161 • MM74HC163

Synchronous Binary Counter with Asynchronous Clear

• Synchronous Binary Counter with Synchronous Clear

The MM74HC161 counter is cleared asynchronously.

When the CLEAR is taken LOW the counter is cleared

immediately regardless of the CLOCK.

General Description

The MM74HC161 and MM74HC163 synchronous presetta-

ble counters utilize advanced silicon-gate CMOS technol-

Two active HIGH enable inputs (ENP and ENT) and a RIP-

ogy and internal look-ahead carry logic for use in high

PLE CARRY (RC) output are provided to enable easy cas-

speed counting applications. They offer the high noise

cading of counters. Both ENABLE inputs must be HIGH to

immunity and low power consumption inherent to CMOS

count. The ENT input also enables the RC output. When

with speeds similar to low power Schottky TTL. The HC161

enabled, the RC outputs a positive pulse when the counter

and the HC163 are 4 bit binary counters. All flip-flops are

overflows. This pulse is approximately equal in duration to

clocked simultaneously on the LOW-to-HIGH transition

the HIGH level portion of the Q_Aoutput. The RC output is

(positive edge) of the CLOCK input waveform.

fed to successive cascaded stages to facilitate easy imple-

mentation of N-bit counters.

These counters may be preset using the LOAD input. Pre-

setting of all four flip-flops is synchronous to the rising edge

of CLOCK. When LOAD is held LOW counting is disabled

and the data on the A, B, C, and D inputs is loaded into the

All inputs are protected from damage due to static dis-

charge by diodes to V_CCand ground.

counter on the rising edge of CLOCK. If the load input is

taken HIGH before the positive edge of CLOCK the count

operation will be unaffected.

Features

■ Typical operating frequency: 40 MHz

All of these counters may be cleared by utilizing the

■ Typical propagation delay; clock to Q: 18 ns

CLEAR input. The clear function on the MM74HC163

■ Low quiescent current: 80 µA maximum (74HC Series)

counter is synchronous to the clock. That is, the counters

■ Low input current: 1 µA maximum

■ Wide power supply range: 2–6V

are cleared on the positive edge of CLOCK while the clear

input is held LOW.

Ordering Code:

Order Number Package Number

Package Description

MM74HC161M

(Note 1)

M16A

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

MM74HC161SJ

M16D

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

MM74HC161MTC

(Note 1)

MTC16

16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

MM74HC161N

N16E

M16A

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

MM74HC163M

(Note 1)

MM74HC163SJ

MM74HC163N

M16D

N16E

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

Note 1: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

DS005008

www.fairchildsemi.com

12 3 4 5 6 7...9

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与MM74HC161_03相关器件

型号	品牌	获取价格	描述	数据表
MM74HC161J	TI	获取价格	HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, CDIP16, CERAMIC, DIP-16
MM74HC161J	NSC	获取价格	IC HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, CDIP16, CERAMIC, DIP
MM74HC161J/A+	ETC	获取价格	Synchronous Up Counter
MM74HC161M	FAIRCHILD	获取价格	Synchronous Binary Counter with Asynchronous Clear . Synchronous Binary Counter with Synch
MM74HC161M	TI	获取价格	HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO16, PLASTIC, SO-16
MM74HC161M/A+	NSC	获取价格	IC,COUNTER,UP,4-BIT BINARY,HC-CMOS,SOP,16PIN,PLASTIC
MM74HC161MTC	FAIRCHILD	获取价格	Synchronous Binary Counter with Asynchronous Clear . Synchronous Binary Counter with Synch
MM74HC161MTCX	FAIRCHILD	获取价格	Binary Counter, HC/UH Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, C
MM74HC161MX	FAIRCHILD	获取价格	Binary Counter, HC/UH Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, C
MM74HC161MX	TI	获取价格	HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, PDSO16, PLASTIC, SO-16

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