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CD54ACT161F3A.A中文资料

厂家型号

CD54ACT161F3A.A

文件大小

461.72Kbytes

页面数量

18

功能描述

4-BIT SYNCHRONOUS BINARY COUNTERS

数据手册

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简称

TI2德州仪器

生产厂商

Texas Instruments

中文名称

美国德州仪器公司官网

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CD54ACT161F3A.A数据手册规格书PDF详情

Inputs Are TTL-Voltage Compatible

Internal Look-Ahead for Fast Counting

Carry Output for n-Bit Cascading

Synchronous Counting

Synchronously Programmable

SCR-Latchup-Resistant CMOS Process and

Circuit Design

Exceeds 2-kV ESD Protection per

MIL-STD-883, Method 3015

description/ordering information

The ’ACT161 devices are 4-bit binary counters. These synchronous, presettable counters feature an internal

carry look-ahead for application in high-speed counting designs. Synchronous operation is provided by having

all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed

by the count-enable (ENP, ENT) inputs and internal gating. This mode of operation eliminates the output

counting spikes that normally are associated with synchronous (ripple-clock) counters. A buffered clock (CLK)

input triggers the four flip-flops on the rising (positive-going) edge of the clock waveform.

These devices are fully programmable; that is, they can be preset to any number between 0 and 9 or 15.

Presetting is synchronous; therefore, setting up a low level at the load input disables the counter and causes

the outputs to agree with the setup data after the next clock pulse, regardless of the levels of the enable inputs.

The clear function is asynchronous. A low level at the clear (CLR) input sets all four of the flip-flop outputs low,

regardless of the levels of the CLK, load (LOAD), or enable inputs.

The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications without

additional gating. Instrumental in accomplishing this function are ENP, ENT, and a ripple-carry output (RCO).

Both ENP and ENT must be high to count, and ENT is fed forward to enable RCO. Enabling RCO produces a

high-level pulse while the count is maximum (9 or 15, with QA high). This high-level overflow ripple-carry pulse

can be used to enable successive cascaded stages. Transitions at ENP or ENT are allowed, regardless of the

level of CLK.

The counters feature a fully independent clock circuit. Changes at control inputs (ENP, ENT, or LOAD) that

modify the operating mode have no effect on the contents of the counter until clocking occurs. The function of

the counter (whether enabled, disabled, loading, or counting) is dictated solely by the conditions meeting the

stable setup and hold times.

更新时间:2025-7-23 15:01:00
供应商 型号 品牌 批号 封装 库存 备注 价格
TI德州仪器
22+
24000
原装正品现货,实单可谈,量大价优
HAR
24+
5650
公司原厂原装现货假一罚十!特价出售!强势库存!
TI
24+
DIP
5000
只做原装公司现货
TI
三年内
1983
只做原装正品
TI/德州仪器
25+
CDIP-16
8880
原装认准芯泽盛世!
HAR
22+
CDIP
12245
现货,原厂原装假一罚十!
TI/德州仪器
23+
CDIP-16
2000
原装正品,支持实单
HAR
9010+;9238+
CDIP
12
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TI
23+
DIP
28000
原装正品
TI/德州仪器
24+
DIP
380
只供应原装正品 欢迎询价

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Texas Instruments 美国德州仪器公司

中文资料: 20568条

德州仪器(Texas Instruments),简称TI,是全球领先的半导体公司,为现实世界的信号处理提供创新的数字信号处理(DSP)及模拟器件技术。除半导体业务外,还提供包括传感与控制、教育产品和数字光源处理解决方案。TI总部位于美国德克萨斯州的达拉斯,并在25多个国家设有制造、设计或销售机构。德州仪器是推动互联网时代不断发展的半导体引擎,作为实时技术的领导者,TI正在快速发展,在无线与宽带接入等大型市场及数码相机和数字音频等新兴市场方面,凭借性能卓越的半导体解决方案不断推动着互联网时代的前进步伐。TI预想未来世界的方方面面都渗透着TI产品的点点滴滴,每个电话、每次上网、拍的每张照片、听的每