Philips Semiconductors

Product specification

74F621

Octal bus transceiver, non-inverting (open collector)

1996 Jan 05

4

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limits set forth in this table may impair the useful life of the device.

Unless otherwise noted these limits are over the operating free-air temperature range.)

SYMBOL

PARAMETER

RATING

UNIT

Supply voltage

–0.5 to +7.0

V

Input voltage

–0.5 to +7.0

V

Input current

–30 to +5

mA

Voltage applied to output in High output state

–0.5 to +5.5

V

Current applied to output in Low output state

A0–A7

48

mA

Current applied to output in Low output state

B0–B7

128

mA

Operating free-air temperature range

0 to +70

°C

Storage temperature range

–65 to +150

°C

RECOMMENDED OPERATING CONDITIONS

SYMBOL

PARAMETER

LIMITS

UNIT

SYMBOL

PARAMETER

MIN

NOM

MAX

UNIT

Supply voltage

4.5

5.0

5.5

V

High-level input voltage

2.0

V

Low-level input voltage

0.8

V

Input clamp current

–18

mA

High-level output current

4.5

V

Low level output current

A0–A7

24

mA

Low-level output current

B0–B7

64

mA

Operating free-air temperature range

0

70

°C

DC ELECTRICAL CHARACTERISTICS

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

NO TAG

LIMITS

SYMBOL

PARAMETER

MIN

TYP

NO TAG

MAX

UNIT

High-level output current

250

µA

A0 A7

0.35

0.50

V

Low-level output

A0–A7

0.35

0.50

V

voltage

B0 B7

0.38

0.55

V

B0–B7

0.42

0.55

V

Input clamp voltage

–0.73

–1.2

V

I

Input current at

maximum input

OEBA, OEAB

100

µA

maximum in ut

voltage

others

1

mA

High-level input current

20

µA

Low-level input current

–20

µA

Supply current

OEBA = OEAB = A0–A7 = 4.5V

105

140

mA

Supply current

(total)

OEBA = OEAB = 4.5V,

A0–A7 = GND

105

140

mA

NOTES:

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