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CD74ACT163M96.A中文资料

厂家型号

CD74ACT163M96.A

文件大小

462.2Kbytes

页面数量

18

功能描述

4-BIT SYNCHRONOUS BINARY COUNTERS

数据手册

下载地址一下载地址二到原厂下载

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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CD74ACT163M96.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

description/ordering information

The ’ACT163 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 instructed by the

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

spikes normally 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.

The counters 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 synchronous. A low level at the clear (CLR) input sets all four of the flip-flop outputs low

after the next low-to-high transition of CLK, regardless of the levels of the enable inputs. This synchronous clear

allows the count length to be modified easily by decoding the Q outputs for the maximum count desired. The

active-low output of the gate used for decoding is connected to CLR to synchronously clear the counter to 0000

(LLLL).

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

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

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.

These devices 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:2025-7-24 14:56:00
供应商 型号 品牌 批号 封装 库存 备注 价格
Texas Instruments
24+
16-SOIC
56200
一级代理/放心采购
TI
20+
SOP-16
2500
就找我吧!--邀您体验愉快问购元件!
TI(德州仪器)
2021+
SOIC-16
499
Texas Instruments(德州仪器)
22+
NA
500000
万三科技,秉承原装,购芯无忧
TI
22+
16SOIC
9000
原厂渠道,现货配单
TI
23+
16SOIC
9000
原装正品,支持实单
TI
23+
16-SOIC
3115
正品原装货价格低
TI(德州仪器)
24+
SOP16
7350
现货供应,当天可交货!免费送样,原厂技术支持!!!
Texas Instruments
23+
16-SOIC
7300
专注配单,只做原装进口现货
Texas Instruments
23+
16-SOIC
7300
专注配单,只做原装进口现货

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Texas Instruments 美国德州仪器公司

中文资料: 21998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