HD74LS157P 查看數據表（PDF） - Renesas Electronics

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HD74LS157P

Quadruple 2-line-to-1-line Data Selectors / Multiplexers (noninverted outputs)

Renesas Electronics 

HD74LS157

Electrical Characteristics

Item

Input voltage

Symbol

VIH

VIL

min.

2.0

—

typ.*

—

—

max.

—

0.8

Unit

V

V

Output voltage

VOH

2.7

—

—

V

—

—

0.4

VOL

V

—

—

0.5

S, G

A, B

IIH

—

—

40

µA

—

—

20

S, G

Input current

A, B

IIL

—

—

–0.8

mA

—

—

–0.4

S, G

A, B

II

—

—

0.2

mA

—

—

0.1

Short-circuit output

current

IOS

–20

—

–100

mA

Supply current**

ICC

—

9.7

16

mA

Input clamp voltage

VIK

—

—

–1.5

V

Notes: * VCC = 5 V, Ta = 25°C

** ICC is measured with all outputs open and all inputs at 4.5 V.

(Ta = –20 to +75 °C)

Condition

VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,

IOH = –400 µA

IOL = 4 mA VCC = 4.75 V, VIH = 2 V,

IOL = 8 mA VIL = 0.8 V

VCC = 5.25 V, VI = 2.7 V

VCC = 5.25 V, VI = 0.4 V

VCC = 5.25 V, VI = 7 V

VCC = 5.25 V

VCC = 5.25 V

VCC = 4.75 V, IIN = –18 mA

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol Inputs Output min.

typ.

max.

Unit

Condition

tPLH

Data

Y

—

9

14

ns

tPHL

—

9

14

ns

Propagation delay time

tPLH

Strobe

Y

tPHL

—

13

20

ns

—

14

21

ns

CL = 15 pF, RL = 2 kΩ

tPLH

Select

Y

tPHL

—

15

23

ns

—

18

27

ns

Rev.2.00, Feb.18.2005, page 3 of 6

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