DM74AS257M 데이터 시트보기 (PDF) - Fairchild Semiconductor

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DM74AS257M

3-STATE Quad 1 of 2 Line Data Selector/Multiplexers

Fairchild Semiconductor 

Electrical Characteristics

Over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.

Symbol

Parameter

Conditions

Min. Typ. Max. Units

VIK Input Clamp Voltage

VOH HIGH Level Output Voltage

VOL LOW Level Output Voltage

II

Input Current @ Max. Input

Voltage

VCC = 4.5V, II = –18 mA

VCC = 4.5V, IOH = Max

IOH = –2 mA, VCC = 4.5V to 5.5V

VCC = 4.5V, IOL = Max

VCC = 5.5V, VIH = 7V A, B, G

Select

–1.2 V

2.4

3.2

V

VCC – 2

0.35 0.5

V

0.1 mA

0.2

IIH HIGH Level Input Current

VCC = 5.5V, VIH = 2.7V A, B, G

Select

20 µA

40

IIL LOW Level Input Current

VCC = 5.5V, VIL = 0.4V Select

All Others

IO(1) Output Drive Current

VCC = 5.5V, VO = 2.25V

–30

IOZH Off-State Output Current,

HIGH Level Voltage Applied

VCC = 5.5V, VO = 2.7V

–1 mA

–0.5

–112 mA

–50 µA

IOZL Off-State Output Current,

LOW Level Voltage Applied

VCC = 5.5V, VO = 0.4V

–50 µA

ICCH

Supply Current DM74AS257

DM74AS258

VCC = 5.5V,

Outputs Open

Outputs HIGH

12.9 19.7 mA

8.8 13.5

ICCL Supply Current DM74AS257

DM74AS258

Outputs LOW

19 30.6 mA

15.8 24.6

ICCZ Supply Current DM74AS257

DM74AS258

Outputs

Disabled

19.7 31.9 mA

15.5 25.2

Note:

1. The output conditions have been chosen to produce a current that closely approximates one half of the true

short-circuit output current, IOS.

©1986 Fairchild Semiconductor Corporation

DM74AS257, DM74AS258 Rev. 1.2

4

www.fairchildsemi.com

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