HD74HC257

Rev.2.00 Jan 31, 2006 page 3 of 7

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage range

–0.5 to 7.0

V

Input / Output voltage

V

Input / Output diode current

±20

mA

Output current

±35

mA

±75

mA

Power dissipation

500

mW

Storage temperature

Tstg

–65 to +150

°C

Note:

The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of

which may be realized at the same time.

Recommended Operating Conditions

Item

Symbol

Ratings

Unit

Conditions

Supply voltage

2 to 6

V

Input / Output voltage

V

Operating temperature

Ta

–40 to 85

°C

0 to 1000

0 to 500

Input rise / fall time

*1

0 to 400

ns

Notes: 1. This item guarantees maximum limit when one input switches.

Waveform: Refer to test circuit of switching characteristics.

Electrical Characteristics

Ta = 25°C

Ta = –40 to+85°C

Item

Min

Typ

Max

Min

Max

Unit

Test Conditions

2.0

1.5

—

—

1.5

—

4.5

3.15

—

—

3.15

—

6.0

4.2

—

—

4.2

—

V

2.0

—

—

0.5

—

0.5

4.5

—

—

1.35

—

1.35

Input voltage

6.0

—

—

1.8

—

1.8

V

2.0

1.9

2.0

—

1.9

—

4.5

4.4

4.5

—

4.4

—

6.0

5.9

6.0

—

5.9

—

µA

4.5

4.18

—

—

4.13

—

6.0

5.68

—

—

5.63

—

V

2.0

—

0.0

0.1

—

0.1

4.5

—

0.0

0.1

—

0.1

6.0

—

0.0

0.1

—

0.1

µA

4.5

—

—

0.26

—

0.33

Output voltage

6.0

—

—

0.26

—

0.33

V

Off-state output

current

6.0

—

—

±0.5

—

±5.0

Input current

Iin

6.0

—

—

±0.1

—

±1.0

Quiescent supply

current

6.0

—

—

4.0

—

40