SN74ABT646NT

更新时间： 2024-11-24 22:15:27

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
16页	340K
描述
OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

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SN74ABT646NT 数据手册

SN54ABT646, SN74ABT646

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCBS068E – JULY 1991 – REVISED JULY 1994

SN54ABT646 . . . JT PACKAGE

SN74ABT646 . . . DB, DW, NT, OR PW PACKAGE

(TOP VIEW)

• State-of-the-Art EPIC-ΙΙB BiCMOS Design

Significantly Reduces Power Dissipation

• 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

GND

CLKBA

SBA

• Latch-Up Performance Exceeds 500 mA

Per JEDEC Standard JESD-17

• Typical V

(Output Ground Bounce)

OLP

< 1 V at V

= 5 V, T = 25°C

• High-Drive Outputs (–32-mA I

64-mA I

)

• Package Options Include Plastic

Small-Outline (DW), Shrink Small-Outline

(DB), and Thin Shrink Small-Outline (PW)

Packages, Ceramic Chip Carriers (FK), and

Plastic (NT) and Ceramic (JT) DIPs

SN54ABT646 . . . 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 ′ABT646.

28 27 26

21 B3

12 13 14 15 16 17 18

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

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.

To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN74ABT646 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count

and functionality of standard small-outline packages in less than half the printed-circuit-board area.

The SN54ABT646 is characterized for operation over the full military temperature range of –55°C to 125°C. The

SN74ABT646 is characterized for operation from –40°C to 85°C.

EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.

UNLESS OTHERWISE NOTED this document contains PRODUCTION

DATA information 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...16

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SN74ABT646NT 替代型号

型号	品牌	替代类型	描述	数据表
SN74ABT646DGVR	TI	完全替代	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT646PWR	TI	类似代替	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT646DBR	TI	类似代替	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

与SN74ABT646NT相关器件

型号	品牌	获取价格	描述	数据表
SN74ABT646NTE4	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT646PW	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT646PWE4	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT646PWLE	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT646PWR	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT646PWRE4	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT646PWRG4	TI	获取价格	ABT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, GREEN, PLASTIC, TSSOP-24
SN74ABT648DW	TI	获取价格	IC,BUS TRANSCEIVER,SINGLE,8-BIT,BICMOS-TTL,SOP,24PIN,PLASTIC
SN74ABT651	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
SN74ABT651DB	TI	获取价格	OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS

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