SN74ALS641A, SN74ALS642A, SN74AS641

OCTAL BUS TRANSCEIVERS

WITH OPEN-COLLECTOR OUTPUTS

SDAS300 – MARCH 1995

4

POST OFFICE BOX 655303

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range

– 65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

recommended operating conditions

SN74AS641

UNIT

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VOH

High-level output voltage

5.5

V

IOL

Low-level output current

64

mA

TA

Operating free-air temperature

0

70

°C

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN74AS641

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP‡

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.2

V

IOH

VCC = 4.5 V,

VOH = 5.5 V

0.1

mA

VOL

VCC = 4.5 V,

IOL = 64 mA

0.35

0.55

V

II

Control inputs

VCC =5 5V

VI = 7 V

0.1

mA

II

A or B ports

VCC = 5.5 V

VI = 5.5 V

0.1

mA

IIH

Control inputs

VCC =5 5V

VI =2 7V

20

µA

IIH

A or B ports§

VCC = 5.5 V,

VI = 2.7 V

70

µA

IIL

Control inputs

VCC =5 5V

VI =0 4V

– 0.5

mA

IIL

A or B ports§

VCC = 5.5 V,

VI = 0.4 V

– 0.75

mA

ICC

VCC =5 5V

Outputs high

50

82

mA

ICC

VCC = 5.5 V

Outputs low

84

136

mA

‡ All typical values are at VCC = 5 V, TA = 25°C.

§ For I/O ports, the parameters IIH and IIL include the off-state output current.