HD74LS145 데이터 시트보기 (PDF) - Renesas Electronics

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HD74LS145

BCD-to-Decimal Decoder / Driver (with 15 V outputs)

Renesas Electronics 

HD74LS145

Testing Method

Test Circuit

4.5V

P.G.

Zout = 50Ω

Input

VCC

0

1

A

2

3

B

4

C

5

6

D

7

8

9

Output

RL

CL

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 5

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