MC74ACT245SD データシートの表示（PDF） - ON Semiconductor

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MC74ACT245SD

Octal Bidirectional Transceiver with 3 State Inputs/Outputs

ON Semiconductor 

MC74AC245

MC74ACT245

Octal Bidirectional Transceiver

with 3ĆState Inputs/Outputs

The MC74AC245/74ACT245 contains eight non-inverting bidirectional buffers

with 3-state outputs and is intended for bus-oriented applications. Current sinking

capability is 24 mA at both the A and B ports. The Transmit/Receive (T/R) input

determines the direction of data flow through the bidirectional transceiver. Transmit

(active-HIGH) enables data from A ports to B ports; Receive (active-LOW) enables

data from B ports to A ports. The Output Enable input, when HIGH, disables both A

and B ports by placing them in a High Z condition.

• Noninverting Buffers

• Bidirectional Data Path

• A and B Outputs Source/Sink 24 mA

• ′ACT245 Has TTL Compatible Inputs

VCC OE B0 B1 B2 B3 B4 B5 B6 B7

20 19 18 17 16 15 14 13 12 11

1 2 3 4 5 6 7 8 9 10

T/R A0 A1 A2 A3 A4 A5 A6 A7 GND

PIN NAMES

OE

T/R

A0–A7

B0–B7

Output Enable Input

Transmit/Receive Input

Side A 3-State Inputs or 3-State Outputs

Side B 3-State Inputs or 3-State Outputs

TRUTH TABLES

Inputs

OE T/R

Outputs

L L Bus B Data to Bus A

L H Bus A Data to Bus B

H X High Z State

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

OCTAL BIDIRECTIONAL

TRANSCEIVER

WITH 3-STATE

INPUTS/OUTPUTS

N SUFFIX

CASE 738-03

PLASTIC

DW SUFFIX

CASE 751D-04

PLASTIC

FACT DATA

5-1

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