HD74HCT623 データシートの表示（PDF） - Renesas Electronics

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HD74HCT623

Octal Bus Transceivers

Renesas Electronics 

HD74HCT620, HD74HCT623

Test Circuit

HD74HCT620

VCC

VCC

Input

Pulse Generator

Zout = 50 Ω

GBA

GAB

S1

A1

B1

Output

1 kΩ S2

CL =

50 pF

OPEN

GND

VCC

TEST

tPLH / tPHL

tZH / tHZ

tZL / tLZ

S2

OPEN

GND

VCC

Note : 1. CL includes probe and jig capacitance.

2. A2–B2, A3–B3, A4–B4, A5–B5, A6–B6, A7–B7, A8–B8 are identical to above load circuit.

3. S1 is a input / output swich.

HD74HCT623

VCC

VCC

Input

Pulse Generator

Zout = 50 Ω

GBA

GAB

S1

A1

B1

Output

1 kΩ S2

CL =

50 pF

OPEN

GND

VCC

TEST

tPLH / tPHL

tZH / tHZ

tZL / tLZ

S2

OPEN

GND

VCC

Note : 1. CL includes probe and jig capacitance.

2. A2–B2, A3–B3, A4–B4, A5–B5, A6–B6, A7–B7, A8–B8 are identical to above load circuit.

3. S1 is a input / output swich.

Rev.2.00 Mar 30, 2006 page 5 of 8

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