HD74LVC245AFP 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HD74LVC245AFP

Octal Bidirectional Transceivers with 3-state Outputs

Hitachi -> Renesas Electronics 

HD74LVC245A

Test Circuit

VCC

VCC

OE

Input

Pulse

Generator

Zout = 50 Ω

T/R

S1

A0

B0

Output

500 Ω S2

CL =

450 Ω

50 pF 50 Ω Scope

OPEN

*1 See

under table

GND

Note:

1. CL includes probe and jig capacitance.

Waveforms – 1

Symbol

tPLH / t PHL

tZH/ t HZ

tZL / t LZ

S2

Vcc=2.7V,

3.3±0.3V

Vcc=5.0±0.5V

OPEN OPEN

GND

GND

6V

2×Vcc

Input

In phase output

10 %

tr

90 %

Vref

tPLH

Vref

tf

90 %

Vref

10 %

tPHL

Vref

VIH

GND

VOH

VOL

6

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