SN54ALS112A, SN74ALS112A

DUAL J-K NEGATIVE-EDGE-TRIGGERED FLIP-FLOPS

WITH CLEAR AND PRESET

SDAS199A – APRIL 1982 – REVISED DECEMBER 1994

3

POST OFFICE BOX 655303

recommended operating conditions

SN54ALS112A

SN74ALS112A

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

– 0.4

– 0.4

mA

IOL

Low-level output current

4

8

mA

fclock

Clock frequency

0

25

0

30

MHz

PRE or CLR low

15

10

tw

Pulse duration

CLK high

20

16.5

ns

CLK low

20

16.5

t

Set p time before CLK

↓

Data

25

22

ns

tsu

Setup time before CLK

↓

PRE or CLR inactive

22

20

ns

th

Hold time after CLK

↓

Data

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

SN54ALS112A

SN74ALS112A

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

MIN

TYP†

MAX

UNIT

VIK

VCC = 4.5 V,

II = –18 mA

–1.5

–1.5

V

VOH

VCC = 4.5 V to 5.5 V,

IOH = – 0.4 mA

VCC –2

VCC –2

V

VOL

VCC =4 5V

IOL = 4 mA

0.25

0.4

0.25

0.4

V

VOL

VCC = 4.5 V

IOL = 8 mA

0.35

0.5

V

II

J, K, or CLK

VCC =5 5V

VI =7V

0.1

0.1

mA

II

PRE or CLR

VCC = 5.5 V,

VI = 7 V

0.2

0.2

mA

IIH

J, K, or CLK

VCC =5 5V

VI =2 7V

20

20

µA

IIH

PRE or CLR

VCC = 5.5 V,

VI = 2.7 V

40

40

µA

IIL

J, K, or CLK

VCC =5 5V

VI =0 4V

– 0.2

– 0.2

mA

IIL

PRE or CLR

VCC = 5.5 V,

VI = 0.4 V

– 0.4

– 0.4

mA

IO‡

VCC = 5.5 V,

VO = 2.25 V

–20

–112

–30

–112

mA

ICC

VCC = 5.5 V,

See Note 1

2.5

4.5

2.5

4.5

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.

NOTE 1: ICC is measured with J, K, CLK, and PRE grounded, then with J, K, CLK, and CLR grounded.