Philips Semiconductors

Product specification

74F244/74F244B

Octal buffers (3-State)

1994 Dec 5

5

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)

SYMBOL

PARAMETER

TEST

LIMITS

UNIT

SYMBOL

PARAMETER

MIN

MAX

UNIT

2.5

V

High-level output voltage

2.7

3.4

V

2.0

V

2.0

V

Low-level output voltage

0.55

V

0.42

0.55

V

Input clamp voltage

-0.73

-1.2

V

Input current at maximum input voltage

100

µA

High-level input current

20

µA

74F244 OEa, OEb

-1.0

mA

Low-level input current

74F244 Ian, Ibn

-1.6

mA

74F244B all inputs

-40

µA

Off-state output current,

high-level voltage applied

50

µA

Off-state output current,

low-level voltage applied

-50

µA

-100

-225

mA

40

60

mA

74F244

60

90

mA

Supply current (total)

60

90

mA

20

30

mA

74F244B

50

70

mA

29

40

mA

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.

techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting

of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any