HD74BC245A 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HD74BC245A

Octal Bus Transceivers With 3 State Outputs

Hitachi -> Renesas Electronics 

HD74BC245A

Octal Bus Transceivers With 3 State Outputs

ADE-205-008A (Z)

Rev. 1

March 1993

Description

The HD74BC245A provides high drivability and operation equal to or better than high speed bipolar

standard logic IC by using Bi-CMOS process. The device features low power dissipation that is about 1/5

of high speed bipolar logic IC, when the frequency is 10 MHz. The device has ten buffers with three state

outputs in a 20 pin package. Each device has an active low enable input G and a direction control input

DiR. When DiR is high, data flows from the A inputs to the B outputs. When DiR is low, data flows from

the B inputs to the A outputs. When G is high, disables both A and B ports by placing then in a high

impedance.

Features

• Input/Output are at high impedance state when power supply is off.

• Built in input pull up circuit can make input pins be open, when not used.

• TTL level input

• Wide operating temperature range

Ta = –40 to + 85°C

Function Table

Control Inputs

G

DiR

L

L

L

H

H

X

H : High level

L : Low level

Z : High impedance

Operation

B data to A bus

A data to B bus

Z

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