74F545PC データシートの表示（PDF） - Fairchild Semiconductor

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74F545PC

Octal Bidirectional Transceiver with 3-STATE Outputs

Fairchild Semiconductor 

Unit Loading/Fan Out

Pin Names

OE

T/R

A0–A7

B0–B7

Description

U.L.

HIGH/LOW

Output Enable Input (Active LOW)

Transmit/Receive Input

Side A 3-STATE Inputs or

3-STATE Outputs

Side B 3-STATE Inputs or

3-STATE Outputs

1.0/2.0

1.0/2.0

3.5/1.083

150/40 (33.3)

3.5/1.083

600/106.6 (80)

Input IIH/IIL

Output IOH/IOL

20 µA/−1.2 mA

20 µA/−1.2 mA

70 µA/−650 µA

−3 mA/24 mA (20 mA)

70 µA/−650 µA

−12 mA/64 mA (48 mA)

Truth Table

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

Logic Diagram

Inputs

OE

T/R

L

L

L

H

H

X

Outputs

Bus B Data to Bus A

Bus A Data to Bus B

High Z

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

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