Datasheet > 74AC646_00

74AC646_00

更新时间： 2024-09-27 04:28:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		/
页数	文件大小	规格书
9页	82K
描述
Octal Transceiver/Register with 3-STATE Outputs

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74AC646_00 数据手册

November 1988

Revised October 2000

74AC646 • 74ACT646

Octal Transceiver/Register with 3-STATE Outputs

General Description

Features

■ Independent registers for A and B buses

■ Multiplexed real-time and stored data transfers

■ 3-STATE outputs

The AC/ACT646 consist of registered bus transceiver cir-

cuits, with outputs, D-type flip-flops and control circuitry

providing multiplexed transmission of data directly from the

input bus or from the internal storage registers. Data on the

A or B bus will be loaded into the respective registers on

the LOW-to-HIGH transition of the appropriate clock pin

(CPAB or CPBA). The four fundamental data handling

functions available are illustrated in Figures 1, 2, 3, and

Figure 4.

■ 300 mil dual-in-line package

■ Outputs source/sink 24 mA

■ ACT646 has TTL compatible inputs

Ordering Code:

Order Number Package Number

Package Description

74AC646SC

M24B

N24C

M24B

N24C

24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

74AC646SPC

74ACT646SC

74ACT646SPC

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Logic Symbols

Connection Diagram

IEEE/IEC

Pin Descriptions

Pin Names

Description

A₀–A₇

B₀–B₇

Data Register A Inputs

Data Register A Outputs

Data Register B Inputs

Data Register B Outputs

Clock Pulse Inputs

CPAB, CPBA

SAB, SBA

Transmit/Receive Inputs

Output Enable Input

DIR

Direction Control Input

FACT is a trademark of Fairchild Semiconductor Corporation.

DS010132

www.fairchildsemi.com

12 3 4 5 6 7...9

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与74AC646_00相关器件

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74AC646D-T	NXP	获取价格	IC AC SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, Bus Driver/Transceiver
74AC646FC	TI	获取价格	AC SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CDFP24, CERAMIC, FP-24
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74AC646FCXR	FAIRCHILD	获取价格	Registered Bus Transceiver, AC Series, 1-Func, 8-Bit, True Output, CMOS, CDFP24, CERAMIC,