SN54ALS273, SN74ALS273

OCTAL D-TYPE FLIP-FLOPS

WITH CLEAR

SDAS218A – APRIL 1982 – REVISED DECEMBER 1994

3

POST OFFICE BOX 655303

recommended operating conditions

SN54ALS273

SN74ALS273

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.7

0.8

V

IOH

High-level output current

–1

– 2.6

mA

IOL

Low-level output current

12

24

mA

fclock

Clock frequency

0

30

0

35

MHz

CLR low

10

10

tw

Pulse duration

CLK high

16.5

14

ns

CLK low

16.5

14

t

Set p time before CLK

↑

Data

10

10

ns

tsu

Setup time before CLK

↑

CLR inactive state

15

15

ns

th

Hold time, data after CLK

↑

0

0

ns

TA

Operating free-air temperature

–55

125

0

70

°C

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

SN54ALS273

SN74ALS273

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = – 18 mA

– 1.5

– 1.5

V

VCC = 4.5 V to 5.5 V,

IOH = – 0.4 mA

VCC –2

VCC –2

VOH

VCC =4 5V

IOH = – 1 mA

2.4

3.3

V

VCC = 4.5 V

IOH = – 2.6 mA

2.4

3.2

VOL

VCC =4 5V

IOL = 12 mA

0.25

0.4

0.25

0.4

V

VOL

VCC = 4.5 V

IOL = 24 mA

0.35

0.5

V

II

VCC = 5.5 V,

VI = 7 V

0.1

0.1

mA

IIH

VCC = 5.5 V,

VI = 2.7 V

20

20

µA

IIL

VCC = 5.5 V,

VI = 0.4 V

– 0.2

– 0.2

mA

IO‡

VCC = 5.5 V,

VO = 2.25 V

–20

–112

–30

–112

mA

ICCH

VCC = 5.5 V

11

20

11

20

mA

ICCL

VCC = 5.5 V

19

29

19

29

mA

† All typical values are at VCC = 5 V, TA = 25°C.

‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.