5秒后页面跳转
捷配首页

Datasheet > 暂无类别数据> SN74HC191N
SN74HC191N PDF预览

SN74HC191N

更新时间： 2024-11-01 23:03:11
品牌 Logo 应用领域
德州仪器 - TI 计数器
页数 文件大小 规格书
10页 158K
描述
4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS

阅读下载

中文翻译

获取价格

SN74HC191N 数据手册

 浏览型号SN74HC191N的Datasheet PDF文件第2页浏览型号SN74HC191N的Datasheet PDF文件第3页浏览型号SN74HC191N的Datasheet PDF文件第4页浏览型号SN74HC191N的Datasheet PDF文件第5页浏览型号SN74HC191N的Datasheet PDF文件第6页浏览型号SN74HC191N的Datasheet PDF文件第7页 
SN54HC191, SN74HC191  
4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS  
SCLS121B – DECEMBER 1982 – REVISED MAY 1997  
SN54HC191 . . . J OR W PACKAGE  
SN74HC191 . . . D OR N PACKAGE  
Single Down/Up Count-Control Line  
Look-Ahead Circuitry Enhances Speed of  
Cascaded Counters  
(TOP VIEW)  
B
V
A
Fully Synchronous in Count Modes  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
CC  
Q
B
A
Asynchronously Presettable With Load  
Control  
Q
CLK  
CTEN  
D/U  
RCO  
Package Options Include Plastic  
Small-Outline (D) and Ceramic Flat (W)  
Packages, Ceramic Chip Carriers (FK), and  
Standard Plastic (N) and Ceramic (J)  
300-mil DIPs  
12 MAX/MIN  
11  
10  
9
Q
Q
LOAD  
C
D
C
D
GND  
description  
SN54HC191 . . . FK PACKAGE  
(TOP VIEW)  
The ’HC191 are 4-bit synchronous, reversible,  
up/down binary counters. Synchronous counting  
operation is provided by having all flip-flops  
clocked simultaneously so that the outputs  
change coincident with each other when  
instructed by the steering logic. This mode of  
operation eliminates the output counting spikes  
normally associated with asynchronous (ripple-  
clock) counters.  
3
2
1
20 19  
18  
CLK  
RCO  
NC  
Q
4
5
6
7
8
A
CTEN  
NC  
17  
16  
15 MAX/MIN  
14  
9 10 11 12 13  
D/U  
LOAD  
Q
C
The outputs of the four flip-flops are triggered on  
a low-to-high-level transition of the clock (CLK)  
input if the count-enable (CTEN) input is low. A  
high at CTEN inhibits counting. The direction of  
the count is determined by the level of the  
down/up (D/U) input. When D/Uislow, thecounter  
counts up, and when D/U is high, it counts down.  
NC – No internal connection  
These counters feature a fully independent clock circuit. Change at the control (CTEN and D/U) inputs that  
modifies the operating mode have no effect on the contents of the counter until clocking occurs. The function  
of the counter is dictated solely by the condition meeting the stable setup and hold times.  
These counters are fully programmable; that is, each of the outputs can be preset to either level by placing a  
low on the load (LOAD) input and entering the desired data at the data inputs. The output changes to agree with  
the data inputs independently of the level of CLK. This feature allows the counters to be used as modulo-N  
dividers by simply modifying the count length with the preset inputs.  
Two outputs are available to perform the cascading function: ripple clock (RCO) and maximum/minimum  
(MAX/MIN) count. MAX/MIN produces a high-level output pulse with a duration approximately equal to one  
complete cycle of the clock while the count is zero (all outputs low) counting down, or maximum (9 or 15)  
counting up. RCO produces a low-level output pulse under those same conditions, but only while CLK is low.  
The counters can be easily cascaded by feeding RCO to CTEN of the succeeding counter if parallel clocking  
is used, or to CLK if parallel enabling is used. MAX/MIN can be used to accomplish look ahead for high-speed  
operation.  
The SN54HC191 is characterized for operation over the full military temperature range of –55°C to 125°C. The  
SN74HC191 is characterized for operation from –40°C to 85°C.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 1997, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...10

中文翻译

下载PDF

SN74HC191N 替代型号

型号 品牌 替代类型 描述 数据表
CD74HC191MT TI

类似代替

 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
CD74HC191M TI

类似代替

 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL
CD74HC191E TI

类似代替

 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL

与SN74HC191N相关器件

型号 品牌 获取价格 描述 数据表
SN74HC191N1 TI

获取价格

 		IC,COUNTER,UP/DOWN,4-BIT BINARY,HC-CMOS,DIP,16PIN,PLASTIC
SN74HC191N-10 TI

获取价格

 		HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16
SN74HC191N3 TI

获取价格

 		4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS
SN74HC191NE4 TI

获取价格

 		4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS
SN74HC191NP1 TI

获取价格

 		IC,COUNTER,UP/DOWN,4-BIT BINARY,HC-CMOS,DIP,16PIN,PLASTIC
SN74HC191NP3 TI

获取价格

 		IC,COUNTER,UP/DOWN,4-BIT BINARY,HC-CMOS,DIP,16PIN,PLASTIC
SN74HC191NSLE ROCHESTER

获取价格

 		Binary Counter,
SN74HC191NSLE TI

获取价格

 		IC,COUNTER,UP/DOWN,4-BIT BINARY,HC-CMOS,SOP,16PIN,PLASTIC
SN74HC191NSR TI

获取价格

 		4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS
SN74HC191NSRE4 TI

获取价格

 		4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS

与SN74HC191N相关文章

您还可以找


热门产品
PCB打样/小批量
铝基板
BOM智能配单
PCBA制造
钣金
精密CNC
模具注塑
薄膜开关
精选活动
PCBA打样特惠
四六层板品质升级
铝基板品质升级
一体化电子制造
DFM下载
服务支持
企业认证
产品展示
工厂展示
工艺能力
积分商城
关于捷配
捷配简介
企业文化
公司动态
人才招聘
联系我们
帮助中心
下单流程
付款流程
开票流程
常见问题
全球PCB制造服务专线 400-613-0088

工作时间：9:00-21:00

CEO邮箱：ceo@jiepei.com

投诉邮箱：tousu@jiepei.com

捷配网-微信公众号 微信公众号
捷配网-微信公众号 抖音公众号
资质认证：
合作快递：
支付方式：
Copyright © 2024 Jiepei.com Inc. All Rights Reserved. 版权所有:杭州捷配信息科技有限公司 浙公网安备 33010502006866号 浙ICP备10014259号-119 营业执照ICP证