HD74LS156P datasheet(4/7 Pages) RENESAS

Part #	HD74LS156P

Description	Dual 2-line-to-4-line Decoders / Demultiplexers (with open collector outputs)

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Manufacturer	RENESAS [Renesas Technology Corp]

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4 / 7 page

HD74LS156

Rev.3.00, Jul.13.2005, page 4 of 6

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol

Inputs

Output

Level of

logic

min.

typ.

max.

Unit

Condition

tPLH

A, B, 2C,

1G or 2G

Y

2

—

25

40

tPHL

A, B, 2C,

1G or 2G

Y

2

—

34

51

tPLH

A or B

Y

3

—

31

46

tPHL

A or B

Y

3

—

34

51

tPLH

1C

Y

3

—

32

48

Propagation

delay time

tPHL

1C

Y

3

—

32

48

ns

CL = 15 pF,

RL = 2 k

Ω

Testing Method

Test Circuit

4.5V

1Y0

1Y1

1Y2

1Y3

2Y0

2Y1

2Y3

1C

A

1G

B

2C

2G

Input

P.G.

Zout = 50

Ω

VCC

2Y2

RL

CL

Output

Note:

CL includes probe and jig capacitance.

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