Philips Semiconductors

Product specification

74F640

Octal bus transceiver, inverting (3-State)

1989 Nov 27

5

DC ELECTRICAL CHARACTERISTICS

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

NO TAG

LIMITS

SYMBOL

PARAMETER

MIN

TYP

NO TAG

MAX

UNIT

A0–A7

2.4

V

High level output voltage

B0–B7

2.7

3.3

V

High-level output voltage

B0 B7

2.0

V

B0–B7

2.0

V

A0 A7

0.35

0.50

V

Low level output voltage

A0–A7

0.35

0.50

V

Low-level output voltage

B0 B7

0.55

V

B0–B7

0.42

0.55

V

Input clamp voltage

–0.73

–1.2

V

Input current at maximum

OE,

T/R

100

µA

input voltage

A0–A7,

B0–B7

1.0

mA

High-level input current

OE,

T/R

40

µA

Low-level input current

T/R

only

–40

µA

Off-state output current,

High level of voltage applied

70

µA

Off-state output current,

Low level of voltage applied

–70

µA

Short-circuit output cur-

NO TAG

A0–A7

–60

–150

mA

B0–B7

–100

–225

µA

T/R = An = 4.5V,

OE = GND

66

85

mA

Supply current (total)

T/R = Bn = OE = GND

91

120

mA

T/R = Bn = GND,

OE = 4.5V

78

102

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