HD74LS148

Rev.2.00, Feb.18.2005, page 3 of 5

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

Topr

–20

25

75

°C

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

1 to 7 Inputs

—

—

40

Other inputs

—

—

20

µA

1 to 7 Inputs

—

—

–0.8

Other inputs

—

—

–0.4

mA

1 to 7 Inputs

—

—

0.2

Input

current

Other inputs

—

—

0.1

mA

Short-circuit output

current

–20

—

–100

mA

—

12

20

mA

Condition 1

Supply current**

—

10

17

mA

Condition 2

Input clamp voltage

—

—

–1.5

V

** The condition 1 is measured with inputs 7 and EI grounded, other inputs and outputs open, the condition 2 is

measured with all inputs and outputs open.

Switching Characteristics

Item

Symbol

min.

typ.

max.

Unit

Inputs

Outputs

Output

Waveforms

Condition

—

14

18

—

15

25

ns

0 to 7

In-phase

Output

—

20

36

—

16

29

ns

0 to 7

Out-of-phase

Output

—

7

18

—

25

40

ns

0 to 7

EO

Out-of-phase

Output

—

35

55

—

9

21

ns

0 to 7

GS

In-phase

Output

—

16

25

—

12

25

ns

EI

In-phase

Output

—

12

17

—

14

36

ns

EI

GS

In-phase

Output

—

12

21

Propagation

delay time

—

23

35

ns

EI

EO

In-phase

Output

Ω