Philips Semiconductors

Product specification

74ALS573B/74ALS574A

Latch/flip-flop

1991 Feb 08

5

FUNCTION TABLE – 74ALS574A

INPUTS

OUTPUTS

INTERNAL

OPERATING MODE

OE

CP

Dn

REGISTER

Q0 – Q7

OPERATING MODE

L

↑

l

L

L

Latch and read register

L

↑

h

H

H

Latch and read register

L

↑

X

NC

NC

Hold

H

↑

X

NC

Z

Disable outputs

H

↑

Dn

Dn

Z

Disable outputs

H = High-voltage level

h

= High state must be present one setup time before the Low-to-High clock transition

L

= Low-voltage level

l

= Low state must be present one setup time before the Low-to-High clock transition

NC= No change

X = Don’t care

Z = High impedance “off” state

↑ = Low-to-High clock transition

↑ = Not Low-to-High clock transition

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limit 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

V

Current applied to output in Low output state

48

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

–2.6

mA

Low-level output current

24

mA

Operating free-air temperature range

0

+70

°C