Datasheet > 74LS645

74LS645

更新时间： 2024-11-06 22:53:19

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
8页	145K
描述
LOW POWER SCHOTTKY

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数据手册

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74LS645 数据手册

These octal bus transceivers are designed for asynchronous

two-way communication between data buses. Control function

implementation minimizes external timing requirements. These

circuits allow data transmission from the A bus to B or from the B bus

to A bus depending upon the logic level of the direction control (DIR)

input. Enable input (G) can disable the device so that the buses are

effectively isolated.

http://onsemi.com

LOW

POWER

SCHOTTKY

DEVICE

LS640

LS641

LS642

LS645

OUTPUT

3-State

Open-Collector

3-State

LOGIC

Inverting

True

Inverting

True

FUNCTION TABLE

CONTROL

INPUTS

OPERATION

LS640

LS642

LS641

LS645

PLASTIC

N SUFFIX

CASE 738

DIR

B data to A bus

A data to B bus

Isolation

B data to A bus

A data to B bus

Isolation

H = HIGH Level, L = LOW Level, X = Irrelevant

GUARANTEED OPERATING RANGES (SN74LS640, SN74LS645)

Symbol

Parameter

Supply Voltage

Min

4.75

Typ

5.0

Max

5.25

Unit

SOIC

DW SUFFIX

CASE 751D

Operating Ambient

Temperature Range

°C

Output Current – High

–3.0

–15

Output Current – Low

ORDERING INFORMATION

GUARANTEED OPERATING RANGES (SN74LS641, SN74LS642)

Device

Package

16 Pin DIP

16 Pin

Shipping

Symbol

Parameter

Supply Voltage

Min

4.75

Typ

5.0

Max

5.25

Unit

SN74LS640N

SN74LS640DW

SN74LS641N

SN74LS641DW

SN74LS642N

SN74LS642DW

SN74LS645N

SN74LS645DW

1440 Units/Box

2500/Tape & Reel

1440 Units/Box

2500/Tape & Reel

1440 Units/Box

2500/Tape & Reel

1440 Units/Box

2500/Tape & Reel

Operating Ambient

Temperature Range

°C

16 Pin DIP

16 Pin

Output Voltage – High

Output Current – Low

5.5

16 Pin DIP

16 Pin

16 Pin DIP

16 Pin

Semiconductor Components Industries, LLC, 1999

Publication Order Number:

December, 1999 – Rev. 6

SN74LS640/D

12 3 4 5 6 7 8

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