74ALS258DB datasheet(5/11 Pages) PHILIPS

5 / 11 page

Philips Semiconductors

Product specification

74ALS257/74ALS258

Data selector/multiplexer

1991 Feb 08

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)

SYMBOL

PARAMETER

TEST CONDITIONS1

LIMITS

UNIT

SYMBOL

PARAMETER

TEST CONDITIONS1

MIN

TYP2

MAX

UNIT

High level output voltage

VCC = ±10%, VIL = MAX,

IOH = –0.4mA VCC – 2

VOH

High-level output voltage

VIH = MIN

IOH = MAX

2.4

3.2

Low level output voltage

VCC = MIN, VIL = MAX,

IOL = 12mA

0.25

0.40

VOL

Low-level output voltage

VIH = MIN

IOL = 24mA

0.35

0.50

VIK

Input clamp voltage

VCC = MIN, II = IIK

–0.73

–1.5

Input current at maximum input voltage

VCC = MAX, VI = 7.0V

0.1

IIH

High-level input current

VCC = MAX, VI = 2.7V

µA

IIL

Low-level input current

VCC = MAX, VI = 0.4V

–0.1

IOZH

Off-state output current,

High-level voltage applied

VCC = MAX, VI = 2.7V

µA

IOZL

Off-state output current,

Low-level voltage applied

VCC = MAX, VI = 0.4V

–20

µA

Output current3

VCC = MAX, VO = 2.25V

–30

–112

ICCH

74ALS257

ICCL

VCC = MAX

ICC

Supply current (total)

ICCZ

ICC

Supply current (total)

ICCH

2.5

74ALS258

ICCL

VCC = MAX

ICCZ

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.

2. All typical values are at VCC = 5V, Tamb = 25°C.

3. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

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