DM54191W

更新时间： 2024-11-16 22:54:35

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

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DM54191W 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	CERAMIC, FP-16	Reach Compliance Code：	unknown
HTS代码：	8542.39.00.01	风险等级：	5.85
Is Samacsys：	N	其他特性：	TCO OUTPUT
计数方向：	BIDIRECTIONAL	系列：	TTL/H/L
JESD-30 代码：	R-GDFP-F16	JESD-609代码：	e0
长度：	9.6645 mm	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：	DFP	封装等效代码：	FL16,.3
封装形状：	RECTANGULAR	封装形式：	FLATPACK
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	5 V
传播延迟（tpd）：	36 ns	认证状态：	Not Qualified
座面最大高度：	2.032 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：	YES
技术：	TTL	温度等级：	MILITARY
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	FLAT
端子节距：	1.27 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：	6.604 mm	最小 fmax：	20 MHz
Base Number Matches：	1

DM54191W 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

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与DM54191W相关器件

型号	品牌	获取价格	描述	数据表
DM54191W/883	NSC	获取价格	TTL/H/L SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, CDFP16, CE
DM54192J/883	ROCHESTER	获取价格	Decade Counter, 54 Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL
DM54192W	ROCHESTER	获取价格	Decade Counter,
DM54193	NSC	获取价格	Synchronous Up/Down 4-Bit Binary Counter with Dual Clock
DM54193J	NSC	获取价格	Synchronous Up/Down 4-Bit Binary Counter with Dual Clock
DM54193J/883	NSC	获取价格	Synchronous Up/Down Counter
DM54193J/883	TI	获取价格	TTL/H/L SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, CDIP16, CE
DM54193J/883B	TI	获取价格	IC,COUNTER,UP/DOWN,4-BIT BINARY,STD-TTL,DIP,16PIN,CERAMIC
DM54193J/883B	ROCHESTER	获取价格	Decade Counter,
DM54193J/883C	TI	获取价格	IC,COUNTER,UP/DOWN,4-BIT BINARY,STD-TTL,DIP,16PIN,CERAMIC

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