SN54AS244, SN74AS244

OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS

SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987

POST OFFICE BOX 655303

4

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

7 V

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

Input voltage

7 V

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

Voltage applied to a disabled 3-state output

5.5 V

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

Operating free-air temperature range: SN54AS244

– 55

°C to 125°C

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

SN74AS244

0

°C to 70°C

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

Storage temperature range

– 65

°C to 150°C

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

recommended operating conditions

SN54AS244

SN74AS244

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply Voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

IOH

High-level output current

–12

–15

mA

IOL

Low-level output current

48

64

mA

TA

Operating free-air temperature

–55

125

0

70

°C

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

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54AS244

SN74AS244

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.2

– 1.2

V

VCC = 4.5 V to 5.5 V,

IOH = – 2 mA

VCC –2

VCC –2

V

VCC = 4.5 V,

IOH = – 3 mA

2.4

3.4

2.4

3.4

V

VOH

VCC = 4.5 V,

IOH = – 12 mA

2.4

V

VCC = 4.5 V,

IOH = – 15 mA

2.4

VOL

VCC = 4.5 V,

IOL = 48 mA

0.55

V

VOL

VCC = 4.5 V,

IOL = 64 mA

0.55

V

IOZH

VCC = 5.5 V,

VO = 2.7 V

50

50

µA

IOZL

VCC = 5.5 V,

VO = 0.4 V

–50

–50

µA

II

VCC = 5.5 V,

VI = 7 V

0.1

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

20

µA

IIL

G

VCC =5 5V

VI =0 4V

– 0.5

– 0.5

mA

IIL

A

VCC = 5.5 V,

VI = 0.4 V

–1

–1

mA

IO‡

VCC = 5.5 V,

VO = 2.25 V

–50

– 150

50

– 150

mA

Outputs high

22

34

22

34

ICC

VCC = 5.5 V

Outputs low

60

90

60

90

mA

Outputs disabled

34

54

34

54

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

# The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.