HD74LV244 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HD74LV244

Octal Buffers / Drivers with 3-state Outputs

Hitachi -> Renesas Electronics 

HD74LV244A

Test Circuit

VCC

Input

Pulse generator

Zout = 50 Ω

VCC

1OE, 2OE

Output

1Y1 to 2Y4

1A1 to 2A4

1 kΩ S1

CL =

15 or 50 pF

OPEN

GND

VCC

TEST

tPLH /tPHL

t ZH/tHZ

tZL /tLZ

S1

OPEN

GND

VCC

Note: CL includes the probe and jig capacitance.

10

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