54HC245 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

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54HC245

Octal 3-State Noninverting Bus Transceiver

Motorola => Freescale 

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

Octal 3-State Noninverting

Bus Transceiver

High–Performance Silicon–Gate CMOS

The MC54/74HC245A is identical in pinout to the LS245. The device

inputs are compatible with standard CMOS outputs; with pullup resistors,

they are compatible with LSTTL outputs.

The HC245A is a 3–state noninverting transceiver that is used for 2–way

asynchronous communication between data buses. The device has an

active–low Output Enable pin, which is used to place the I/O ports into

high–impedance states. The Direction control determines whether data

flows from A to B or from B to A.

• Output Drive Capability: 15 LSTTL Loads

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 2 to 6 V

• Low Input Current: 1 µA

• High Noise Immunity Characteristic of CMOS Devices

• In Compliance with the Requirements Defined by JEDEC Standard

No. 7A

• Chip Complexity: 308 FETs or 77 Equivalent Gates

MC54/74HC245A

20

1

J SUFFIX

CERAMIC PACKAGE

CASE 732–03

20

1

20

1

N SUFFIX

PLASTIC PACKAGE

CASE 738–03

DW SUFFIX

SOIC PACKAGE

CASE 751D–04

ORDERING INFORMATION

MC54HCXXXAJ

MC74HCXXXAN

MC74HCXXXADW

Ceramic

Plastic

SOIC

A

DATA

PORT

A1 2

A2 3

A3 4

A4 5

A5 6

A6 7

A7 8

A8 9

DIRECTION 1

OUTPUT ENABLE 19

LOGIC DIAGRAM

PIN 10 = GND

PIN 20 = VCC

18 B1

17 B2

16 B3

15 B4

14 B5

13 B6

12 B7

11 B8

B

DATA

PORT

PIN ASSIGNMENT

DIRECTION 1

A1 2

A2 3

A3 4

A4 5

A5 6

A6 7

A7 8

A8 9

GND 10

20 VCC

19 OUTPUT ENABLE

18 B1

17 B2

16 B3

15 B4

14 B5

13 B6

12 B7

11 B8

FUNCTION TABLE

Control Inputs

Output

Enable Direction

Operation

L

L

Data Transmitted from Bus B to Bus A

L

H

Data Transmitted from Bus A to Bus B

H

X

Buses Isolated (High–Impedance State)

X = don’t care

2/97

© Motorola, Inc. 1997

1

REV 7

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