Philips Semiconductors

Product specification

74ALS273

Octal D-type flip-flop

1991 Feb 08

3

LOGIC DIAGRAM

DQ

RD

Q0

2

GND = Pin 10

CP

D0

3

DQ

RD

Q1

5

CP

D1

4

DQ

RD

Q2

6

CP

D2

7

DQ

RD

Q3

9

CP

D3

8

DQ

RD

Q4

12

CP

D4

13

DQ

RD

Q5

15

CP

D5

14

DQ

RD

Q6

16

CP

D6

17

DQ

RD

Q7

19

CP

D7

18

11

1

CP

MR

SF00349

FUNCTION TABLE

INPUTS

OUTPUTS

OPERATING MODE

MR

CP

Dn

Qn

OPERATING MODE

L

X

X

L

Reset (clear)

H

↑

h

H

Load “1”

H

↑

l

L

Load “0”

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

X = Don’t care

↑ = 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