54191DMQB

更新时间： 2024-11-20 22:29:43

品牌	Logo	应用领域
美国国家半导体 - NSC		计数器逻辑集成电路
页数	文件大小	规格书
6页	132K
描述
Synchronous Up/Down 4-Bit Binary Counter with Mode Control

阅读下载

中文翻译

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

54191DMQB 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	CERAMIC, DIP-16	Reach Compliance Code：	unknown
HTS代码：	8542.39.00.01	风险等级：	5.63
Is Samacsys：	N	其他特性：	TCO OUTPUT
计数方向：	BIDIRECTIONAL	系列：	TTL/H/L
JESD-30 代码：	R-GDIP-T16	JESD-609代码：	e0
长度：	19.43 mm	负载电容（CL）：	15 pF
负载/预设输入：	YES	逻辑集成电路类型：	BINARY COUNTER
最大频率@ Nom-Sup：	20000000 Hz	最大I（ol）：	0.016 A
工作模式：	SYNCHRONOUS	位数：	4
功能数量：	1	端子数量：	16
最高工作温度：	125 °C	最低工作温度：	-55 °C
封装主体材料：	CERAMIC, GLASS-SEALED	封装代码：	DIP
封装等效代码：	DIP16,.3	封装形状：	RECTANGULAR
封装形式：	IN-LINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	5 V	最大电源电流（ICC）：	99 mA
传播延迟（tpd）：	36 ns	认证状态：	Not Qualified
筛选级别：	38535Q/M;38534H;883B	座面最大高度：	5.08 mm
子类别：	Counters	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	4.5 V	标称供电电压 (Vsup)：	5 V
表面贴装：	NO	技术：	TTL
温度等级：	MILITARY	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
触发器类型：	POSITIVE EDGE	宽度：	7.62 mm
最小 fmax：	20 MHz	Base Number Matches：	1

54191DMQB 数据手册

June 1989

54191/DM54191/DM74191 Synchronous Up/Down

4-Bit Binary Counter with Mode Control

General Description

This circuit is a synchronous, reversible, up/down counter.

The 191 is a 4-bit binary counter. Synchronous operation is

provided by having all flip-flops clocked simultaneously so

that the outputs change simultaneously when so instructed

by the steering logic. This mode of operation eliminates the

output counting spikes normally associated with asynchro-

nous (ripple clock) counters.

Two outputs have been made available to perform the cas-

cading function: ripple clock and maximum/minimum count.

The latter output produces a high-level output pulse with a

duration approximately equal to one complete cycle of the

clock when the counter overflows or underflows. The ripple

clock output produces a low-level output pulse equal in

width to the low-level portion of the clock input when an

overflow or underflow condition exists. The counters can be

easily cascaded by feeding the ripple clock output to the

enable input of the succeeding counter if parallel clocking is

used, or to the clock input if parallel enabling is used. The

maximum/minimum count output can be used to accom-

plish look-ahead for high-speed operation.

The outputs of the four master-slave flip-flops are triggered

on a low-to-high level transition of the clock input, if the

enable input is low. A high at the enable input inhibits count-

ing. Level changes at either the enable input or the down/

up input should be made only when the clock input is high.

The direction of the count is determined by the level of the

down/up input. When low, the counter counts up and when

high, it counts down.

Features

Single down/up count control line

This counter is fully programmable; that is, the outputs may

be preset to either level by placing a low on the load input

and entering the desired data at the data inputs. The output

will change independent of the level of the clock input. This

feature allows the counters to be used as modulo-N dividers

by simply modifying the count length with the preset inputs.

Count enable control input

Ripple clock output for cascading

Asynchronously presettable with load control

Parallel outputs

Cascadable for n-bit applications

The clock, down/up, and load inputs are buffered to lower

the drive requirement; which significantly reduces the num-

ber of clock drivers, etc., required for long parallel words.

Alternate Military/Aerospace device (54191) is avail-

able. Contact a National Semiconductor Sales Office/

Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6562–1

Order Number 54191DMQB, 54191FMQB,

DM54191J, DM54191W or DM74191N

See NS Package Number J16A, N16E or W16A

1995 National Semiconductor Corporation

TL/F/6562

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6

中文翻译

下载PDF

与54191DMQB相关器件

型号	品牌	获取价格	描述	数据表
54191-F004	AMPHENOL	获取价格	Fiber Optic FC Connector, 8.3/125um, Single Mode, Simplex
54191FM	FAIRCHILD	获取价格	Binary Counter, Synchronous, Bidirectional, TTL, CDFP16,
54191FMQB	NSC	获取价格	Synchronous Up/Down 4-Bit Binary Counter with Mode Control
54191J/B	ROCHESTER	获取价格	Decade Counter,
54191W/B	ROCHESTER	获取价格	Decade Counter,
54192	TI	获取价格	Counter
54192-2274	MOLEX	获取价格	Board Connector, 110+110 Contact(s), 2+2 Row(s), Female, Straight, 0.025 inch Pitch, Surfa
5419-24-0	POMONA	获取价格	Interconnection Device
5419-24-2	POMONA	获取价格	Interconnection Device
54192DM	FAIRCHILD	获取价格	Decade Counter, Synchronous, Bidirectional, TTL, CDIP16,

与54191DMQB相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

30
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

22
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

51
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

49

产品中心

服务支持

精选活动

关于我们

帮助中心

54191DMQB

54191DMQB 技术参数

54191DMQB 数据手册

与54191DMQB相关器件

与54191DMQB相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

54191DMQB

54191DMQB 技术参数

54191DMQB 数据手册

与54191DMQB相关器件

与54191DMQB相关文章

您还可以找

您在本页遇到什么问题？