HD74LS293

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

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage

7

V

7

V

Input voltage

A, B Inputs

5.5

V

Power dissipation

400

mW

Operating temperature

Topr

–20 to +75

°C

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

Topr

–20

25

75

°C

A input

0

—

32

Count frequency

B input

0

—

16

MHz

A input

15

—

—

B input

30

—

—

Pulse width

Reset

inputs

15

—

—

ns

Setup time

25

—

—

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

Any Reset

—

—

20

A input

—

—

40

B input

—

—

40

µA

Any Reset

—

—

–0.4

A input

—

—

–2.4

B input

—

—

–1.6

mA

Any Reset

—

—

0.1

A input

—

—

0.2

Input

current

B input

—

—

0.2

mA

Short-circuit output current

–20

—

–100

mA

Supply current***

—

9

15

mA

Input clamp voltage

—

—

–1.5

V

while maintaining full fan-out capability.

all other inputs grounded.