Datasheet > 逻辑 > 计数器> HD74LS191FP

HD74LS191FP

更新时间： 2024-09-22 13:01:47

品牌	Logo	应用领域
瑞萨 - RENESAS		计数器逻辑集成电路时钟
页数	文件大小	规格书
11页	93K
描述
LS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDSO16, FP-16DA

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HD74LS191FP 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SOP, SOP16,.3	针数：	16
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.47	其他特性：	TCO OUTPUT
计数方向：	BIDIRECTIONAL	系列：	LS
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e0
长度：	10.06 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）：	0.008 A	工作模式：	SYNCHRONOUS
湿度敏感等级：	1	位数：	4
功能数量：	1	端子数量：	16
最高工作温度：	75 °C	最低工作温度：	-20 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP16,.3	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	5 V	最大电源电流（ICC）：	35 mA
传播延迟（tpd）：	36 ns	认证状态：	Not Qualified
座面最大高度：	2.2 mm	子类别：	Counters
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
技术：	TTL	温度等级：	COMMERCIAL EXTENDED
端子形式：	GULL WING	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：	5.5 mm
最小 fmax：	20 MHz	Base Number Matches：	1

HD74LS191FP 数据手册

HD74LS191

Synchronous Up / Down 4-bit Binary Counter (single clock line)

REJ03D0453–0200

Rev.2.00

Feb.18.2005

Synchronous operation is provided by having all flip-flops clocked simultaneously so that the steering logic. This mode

of operation eliminates the output counting spikes normally associated with asynchronous (ripple clock) counters. 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 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. Level changes at the down / up input should be made only when the clock

input is high. 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 to agree with the data inputs

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

the drive requirement which significantly reduces the number of clock drivers, etc., required for long parallel words.

Two outputs have been made available to perform the cascading function; ripple clock and made available to perform

the cascading function; ripple clock and maximum / minimum count. The latter output produces a high-level output

pulse with a duration approximately equal to one complete cycles to 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 accomplish look-ahead for high-speed operation.

Features

•

Ordering Information

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

Part Name

Package Type

DILP-16 pin

PRDP0016AE-B

(DP-16FV)

HD74LS191P

HD74LS191FPEL

—

PRSP0016DH-B

(FP-16DAV)

SOP-16 pin (JEITA)

EL (2,000 pcs/reel)

Note: Please consult the sales office for the above package availability.

Rev.2.00, Feb.18.2005, page 1 of 10

12 3 4 5 6 7...11

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与HD74LS191FP相关器件

型号	品牌	获取价格	描述	数据表
HD74LS191FP-E	RENESAS	获取价格	暂无描述
HD74LS191FPEL	RENESAS	获取价格	Synchronous Up / Down 4-bit Binary Counter (single clock line)
HD74LS191P	RENESAS	获取价格	Synchronous Up / Down 4-bit Binary Counter (single clock line)
HD74LS191P-E	RENESAS	获取价格	暂无描述
HD74LS191RP	HITACHI	获取价格	Binary Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL
HD74LS191RP	RENESAS	获取价格	LS SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDSO16, FP-16DN
HD74LS192	HITACHI	获取价格	Synchronous Up/Down Decade Counters(dual clock lines)
HD74LS192	RENESAS	获取价格	Synchronous Up / Down Decade Counter (dual clock lines)
HD74LS192FP	HITACHI	获取价格	Decade Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL
HD74LS192FPEL	RENESAS	获取价格	Synchronous Up / Down Decade Counter (dual clock lines)

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