HD74LS21

Rev.2.00, Feb.18.2005, page 3 of 4

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

—

—

0.5

Output voltage

—

—

0.4

V

—

—

20

µA

—

—

–0.4

mA

Input current

—

—

0.1

mA

Short-circuit output

current

–20

—

–100

mA

—

1.2

2.4

mA

Supply current

—

2.2

4.4

mA

Input clamp voltage

—

—

–1.5

V

Note:

Switching Characteristics

Item

Symbol

min.

typ.

max.

Unit

Condition

—

8

15

ns

Propagation delay time

—

10

20

ns

Ω

Note:

Refer to Test Circuit and Waveform of the Common Item "TTL Common Matter (Document No.: REJ27D0005-

0100)".