HD74LS138RPEL 데이터 시트보기 (PDF) - Renesas Electronics

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HD74LS138RPEL

3-Line-to-8-Line Decoders / Demultiplexers

Renesas Electronics 

HD74LS138

Testing Method

Test Circuit

4.5V

P.G.

Zout = 50Ω

Input

VCC Output

RL Load circuit 1

Y0

CL

A

Output

B

C

Y1

Same as Load Circuit 1.

Output

Y2

Same as Load Circuit 1.

G1

Output

G2A

Y3

Same as Load Circuit 1.

G2B

Output

Y4

Same as Load Circuit 1.

Output

Y5

Same as Load Circuit 1.

Output

Y6

Same as Load Circuit 1.

Output

Y7

Same as Load Circuit 1.

Notes: 1. CL includes probe and jig capacitance.

2. All diodes are 1S2074(H).

Waveform

tTLH

tTHL

90%

90%

3V

Input

1.3 V

1.3 V

10%

10%

0V

tPLH

tPHL

In phase Output

1.3 V

tPHL

1.3 V

tPLH

VOH

VOL

Out of phase Output

1.3 V

VOH

1.3 V

VOL

Note: Input pulse; tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, duty cycle 50%

Rev.3.00, Jul.13.2005, page 4 of 7

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