SN74BCT646

更新时间： 2024-10-31 22:53:35

品牌	Logo	应用领域
德州仪器 - TI		总线收发器输出元件
页数	文件大小	规格书
9页	132K
描述
OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

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SN74BCT646 数据手册

SN54BCT646, SN74BCT646

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCBS037C – AUGUST 1989 – REVISED NOVEMBER 1993

SN54BCT646 . . . JT OR W PACKAGE

SN74BCT646 . . . DW OR NT PACKAGE

(TOP VIEW)

• State-of-the-Art BiCMOS Design

Significantly Reduces I

CCZ

• ESD Protection Exceeds 2000 V Per

MIL-STD-883C, Method 3015; Exceeds

200 V Using Machine Model (C = 200 pF,

R = 0)

CLKAB

SAB

DIR

CLKBA

SBA

• Bus Transceivers/Registers

• Independent Registers and Enables for

A and B Buses

• Multiplexed Real-Time and Stored Data

• Power-Up High-Impedance Mode

• Package Options Include Plastic

GND

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK) and Flatpacks (W), and

Plastic and Ceramic 300-mil DIPs (JT, NT)

SN54BCT646 . . . FK PACKAGE

(TOP VIEW)

description

These devices consist of bus transceiver circuits,

D-type flip-flops, and control circuitry arranged for

multiplexed transmission of data directly from the

inputbusorfromtheinternalregisters. Dataonthe

A or B bus is clocked into the registers on the

low-to-high transition of the appropriate clock

(CLKAB or CLKBA) input. Figure 1 illustrates the

four fundamental bus-management functions that

can be performed with the ′BCT646.

1 28 27 26

24 B1

Output-enable (OE) and direction-control (DIR)

inputs are provided to control the transceiver

functions. In the transceiver mode, data present at

the high-impedance port may be stored in either

12 13 14 15 16 17 18

NC – No internal connection

The select-control (SAB and SBA) inputs can

multiplex stored and real-time (transparent mode)

data. The direction control (DIR) determines which bus will receive data when OE is low. In the isolation mode

(OE high), A data may be stored in one register and/or B data may be stored in the other register.

When an output function is disabled, the input function is still enabled and may be used to store and transmit

data. Only one of the two buses, A or B, may be driven at a time.

The SN54BCT646 is characterized for operation over the full military temperature range of –55°C to 125°C. The

SN74BCT646 is characterized for operation from 0°C to 70°C.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

2–1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5 6 7...9

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SN74BCT646 替代型号

型号	品牌	替代类型	描述	数据表
SN54BCT646	TI	功能相似	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

与SN74BCT646相关器件

型号	品牌	获取价格	描述	数据表
SN74BCT646DW	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74BCT646DWE4	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74BCT646DWG4	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74BCT646DWR	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74BCT646DWRE4	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74BCT646DWRG4	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74BCT646JT	TI	获取价格	BCT/FBT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CDIP24, 0.300 INCH, CERAMIC, DI
SN74BCT646NT	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74BCT646NTE4	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74BCT646W	TI	获取价格	BCT/FBT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDFP24, PLASTIC, DFP-24

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