HD74LS194A

Rev.3.00, Jul.15.2005, page 3 of 7

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage

7

V

Input voltage

7

V

Power dissipation

400

mW

Storage temperature

Tstg

–65 to +150

°C

Note:

Voltage value, unless otherwise noted, are with respect to network ground terminal.

Recommended Operating Conditions

Item

Symbol

Min

Typ

Max

Unit

Supply voltage

4.75

5.00

5.25

V

—

—

–400

µA

Output current

—

—

8

mA

Operating temperature

–20

25

75

°C

Clock frequency

0

—

25

MHz

Clock pulse width

20

—

—

ns

Clear pulse width

20

—

—

ns

Mode Control

30

—

—

ns

A, B, C, D, R, L

20

—

—

ns

Setup time

CLR

(inactive state)

25

—

—

ns

Hold time

0

—

—

ns

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol

min.

typ.*

max.

Unit

Condition

2.0

—

—

V

Input voltage

—

—

0.8

V

2.7

—

—

V

µA

—

—

0.4

Output voltage

—

—

0.5

V

—

—

20

µA

—

—

–0.4

mA

Input current

—

—

0.1

mA

Short-circuit output

current

–20

—

–100

mA

Supply current**

—

15

23

mA

Input clamp voltage

—

—

–1.5

V

Switching Characteristics

Item

Symbol

Inputs

Outputs

min.

typ.

max.

Unit

Condition

Maximum clock frequency

25

36

—

MHz

Clear

—

19

30

ns

Clock

—

14

22

ns

Propagation delay time

Clock

Q

—

17

26

ns

Ω