Datasheet > 54LS193

54LS193

更新时间： 2024-01-31 23:20:14

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		计数器
页数	文件大小	规格书
9页	278K
描述
PRESETTABLE BCD/DECADE UP/DOWN COUNTER PRESETTABLE 4-BIT BINARY UP/DOWN COUNTER

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54LS193 技术参数

生命周期：	Obsolete	包装说明：	QCCN, LCC20,.35SQ
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.23	Is Samacsys：	N
其他特性：	TCO UP AND TCO DOWN OUTPUTS; SEPARATE UP/DOWN CLOCK	计数方向：	BIDIRECTIONAL
系列：	LS	JESD-30 代码：	S-CQCC-N20
长度：	8.89 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）：	0.004 A
工作模式：	SYNCHRONOUS	位数：	4
功能数量：	1	端子数量：	20
最高工作温度：	125 °C	最低工作温度：	-55 °C
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	QCCN
封装等效代码：	LCC20,.35SQ	封装形状：	SQUARE
封装形式：	CHIP CARRIER	电源：	5 V
最大电源电流（ICC）：	34 mA	传播延迟（tpd）：	54 ns
认证状态：	Not Qualified	筛选级别：	38535Q/M;38534H;883B
座面最大高度：	1.905 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
端子形式：	NO LEAD	端子节距：	1.27 mm
端子位置：	QUAD	触发器类型：	POSITIVE EDGE
宽度：	8.89 mm	最小 fmax：	25 MHz
Base Number Matches：	1

54LS193 数据手册

SN54/74LS192 • SN54/74LS193

FUNCTIONAL DESCRIPTION

The LS192 and LS193 are Asynchronously Presettable

Decade and 4-Bit Binary Synchronous UP/DOWN (Revers-

able) Counters. The operating modes of the LS192 decade

counter and the LS193 binary counter are identical, with the

only difference being the count sequences as noted in the

State Diagrams. Each circuit contains four master/slave

flip-flops, with internal gating and steering logic to provide

master reset, individual preset, count up and count down

operations.

Each flip-flop contains JK feedback from slave to master

such that a LOW-to-HIGH transition on its T input causes the

slave, and thus the Q output to change state. Synchronous

switching, as opposed to ripple counting, is achieved by

driving the steering gates of all stages from a common Count

Up line and a common Count Down line, thereby causing all

state changes to be initiated simultaneously. A LOW-to-HIGH

transition on the Count Up input will advance the count by one;

a similar transition on the Count Down input will decrease the

count by one. While counting with one clock input, the other

shouldbe held HIGH. Otherwise, the circuit will either count by

twos or not at all, depending on the state of the first flip-flop,

which cannot toggle as long as either Clock input is LOW.

The Terminal Count Up (TC ) and Terminal Count Down

(TC ) outputs are normally HIGH. When a circuit has reached

the maximum count state (9 for the LS192, 15 for the LS193),

the next HIGH-to-LOW transition of the Count Up Clock will

cause TC to go LOW. TC will stay LOW until CP goes

HIGH again, thus effectively repeating the Count Up Clock,

but delayed by two gate delays. Similarly, the TC output will

go LOW when the circuit is in the zero state and the Count

Down Clock goes LOW. Since the TC outputs repeat the clock

waveforms, they can be used as the clock input signals to the

next higher order circuit in a multistage counter.

Each circuit has an asynchronous parallel load capability

permitting the counter to be preset. When the Parallel Load

(PL) and the Master Reset (MR) inputs are LOW, information

present on the Parallel Data inputs (P , P ) is loaded into the

counter and appears on the outputs regardless of the

conditions of the clock inputs. A HIGH signal on the Master

Reset input will disable the preset gates, override both Clock

inputs, and latch each Q output in the LOW state. If one of the

Clock inputs is LOW during and after a reset or load operation,

the next LOW-to-HIGH transition of that Clock will be

interpreted as a legitimate signal and will be counted.

MODE SELECT TABLE

MODE

Reset (Asyn.)

Preset (Asyn.)

No Change

Count Up

Count Down

L = LOW Voltage Level

H = HIGH Voltage Level

X = Don’t Care

= LOW-to-HIGH Clock Transition

FAST AND LS TTL DATA

5-354

1 2 345 6 7...9

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与54LS193相关器件

型号	品牌	描述	获取价格	数据表
54LS193/B2AJC	MOTOROLA	Binary Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL	获取价格
54LS193/B2C	ETC	Synchronous Up/Down Counter	获取价格
54LS193/BEA	PHILIPS	Binary Counter, Synchronous, Bidirectional, TTL, CDIP16	获取价格
54LS193/BFAJC	MOTOROLA	Binary Counter, LS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL	获取价格
54LS193DMQB	ETC	Synchronous Up/Down Counter	获取价格
54LS193FMQB	ETC	Synchronous Up/Down Counter	获取价格

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