HD74LS155 datasheet(4/7 Pages) RENESAS

Part #	HD74LS155

Description	Dual 2-line-to-4-line Decoders / Demultiplexers

PDF	7 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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4 / 7 page

HD74LS155

Rev.2.00, Feb.18.2005, page 4 of 6

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol

Inputs

Output

Levels

of logic

min.

typ.

max.

Unit

Condition

tPLH

—

tPHL

A, B, 2C

1G or 2G

—

tPLH

—

tPHL

A or B

—

tPLH

—

Propagation

delay time

tPHL

—

CL = 15 pF,

RL = 2 k

Ω

Testing Method

Test Circuit

4.5V

1Y0

Load circuit 1

Output

VCC

Input

P.G.

Zout = 50

Ω

1Y2

1Y3

2Y0

2Y1

2Y2

2Y3

1Y1

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Same as Load Circuit 1.

Output

Notes:

CL includes probe and jig capacitance.

All diodes are 1S2074(H).

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