HD74LS112

Rev.3.00, Jul.13.2005, page 3 of 8

Recommended Operating Conditions

Item

Symbol

Min

Typ

Max

Unit

Supply voltage

VCC

4.75

5.00

5.25

V

IOH

—

—

–400

µA

Output current

IOL

—

—

8

mA

Operating temperature

Topr

–20

25

75

°C

Clock frequency

fclock

0

—

30

MHz

Clock High

20

—

—

ns

Pulse width

Clear Preset

Low

tw

25

—

—

ns

“H” Data

20

↓

ns

Setup time

“L” Data

tsu

20

↓

—

—

ns

Hold time

th

0

↓

—

—

ns

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol

min.

typ.*

max.

Unit

Condition

VIH

2.0

—

—

V

Input voltage

VIL

—

—

0.8

V

VOH

2.7

—

—

V

VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,

IOH = –400

µA

—

—

0.5

IOL = 8 mA

Output voltage

VOL

—

—

0.4

V

IOL = 4 mA

VCC = 4.75 V, VIH = 2 V,

VIL = 0.8 V

J, K

—

—

20

Clear

—

—

60

Preset

—

—

60

Clock

IIH

—

—

80

µA

VCC = 5.25 V, VI = 2.7 V

J, K

—

—

–0.4

Clear

—

—

–0.8

Preset

—

—

–0.8

Clock

IIL**

—

—

–0.8

mA

VCC = 5.25 V, VI = 0.4 V

J, K

—

—

0.1

Clear

—

—

0.3

Preset

—

—

0.3

Input

current

Clock

II

—

—

0.4

mA

VCC = 5.25 V, VI = 7 V

Short-circuit output

current

IOS

–20

—

–100

mA

VCC = 5.25 V

Supply current***

ICC

—

4

8

mA

VCC = 5.25 V

Input clamp voltage

VIK

—

—

–1.5

V

VCC = 4.75 V, IIN = –18 mA

Notes: * VCC = 5 V, Ta = 25°C

** IIL should not be measured when preset and clear inputs are low at same time.

*** With all outputs open, ICC is measured with the Q and Q outputs high in turn. At the tires of measurement, the

clock input is grounded.

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol

Inputs

Outputs

min.

typ.

max.

Unit

Condition

Maximum clock frequency

fmax

30

45

—

MHz

tPLH

—

11

20

ns

Propagation delay time

tPHL

Clear

Preset

Clock

Q,

Q

—

15

30

ns

CL = 15 pF,

RL = 2 k

Ω