Datasheet > 逻辑 > 计数器> MM74HC161N

MM74HC161N

更新时间： 2024-02-29 17:01:05

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		计数器
页数	文件大小	规格书
8页	88K
描述
Synchronous Binary Counter with Asynchronous Clear . Synchronous Binary Counter with Synchronous Clear

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MM74HC161N 数据手册

September 1983

Revised February 1999

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

MM74HC161SJ

MM74HC161MTC

MM74HC161N

MM74HC163M

MM74HC163SJ

MM74HC163MTC

MM74HC163N

M16A

M16D

MTC16

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 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

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

M16A

M16D

MTC16

N16E

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

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

DS005008.prf

www.fairchildsemi.com

12 3 4 5 6 7 8

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MM74HC161N 替代型号

型号	品牌	替代类型	描述	数据表
MC74HC161ADR2G	ONSEMI	功能相似	Presettable Counters High−Performance Silicon−Gate CMOS
CD74HC161E	TI	功能相似	High Speed CMOS Logic Presettable Counters
SN74HC161N	TI	功能相似	4-BIT SYNCHRONOUS BINARY COUNTERS

与MM74HC161N相关器件

型号	品牌	获取价格	描述	数据表
MM74HC161N/A+	ETC	获取价格	Synchronous Up Counter
MM74HC161N/B+	ETC	获取价格	Synchronous Up Counter
MM74HC161SJ	FAIRCHILD	获取价格	Synchronous Binary Counter with Asynchronous Clear . Synchronous Binary Counter with Synch
MM74HC161SJX	FAIRCHILD	获取价格	Binary Counter, HC/UH Series, Synchronous, Positive Edge Triggered, 4-Bit, Up Direction, C
MM74HC162	NSC	获取价格	Synchronous Decade Counter with Asynchronous Clear
MM74HC162J	NSC	获取价格	HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, CDIP16, J16A
MM74HC162J/A+	NSC	获取价格	IC,COUNTER,UP,DECADE,HC-CMOS,DIP,16PIN,CERAMIC
MM74HC162M	NSC	获取价格	IC HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDSO16, PLASTIC, SO-
MM74HC162M/A+	NSC	获取价格	IC,COUNTER,UP,DECADE,HC-CMOS,SOP,16PIN,PLASTIC
MM74HC162MX	TI	获取价格	HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDSO16, PLASTIC, SO-16

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