SN74AHC245Q1

OCTAL BUS TRANSCEIVER

WITH 3STATE OUTPUTS

SCLS527A − AUGUST 2003 − REVISED APRIL 2008

1

POST OFFICE BOX 655303

MIL-STD-883, Method 3015; Exceeds 100 V

Using Machine Model (C = 200 pF, R = 0)

description/ordering information

The SN74AHC245 octal bus transceiver is designed

for asynchronous two-way communication between

data buses. The control-function implementation

minimizes external timing requirements.

This device allows data transmission from the A bus

to the B bus or from the B bus to the A bus, depending

on the logic level at the direction-control (DIR) input.

The output-enable (OE) input can be used to disable

the device so that the buses effectively are isolated.

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

TA

PACKAGE‡

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

−40

°C to 125°C

SOIC − DW

Tape and reel

SN74AHC245QDWRQ1

AHC245Q1

−40

°C to 125°C

TSSOP − PW

Tape and reel

SN74AHC245QPWRQ1

AHC245Q1

† For the most current package and ordering information, see the Package Option Addendum at the end of

this document, or see the TI web site at http://www.ti.com.

‡ Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.

FUNCTION TABLE

(each transceiver)

INPUTS

OPERATION

OE

DIR

OPERATION

L

L

B data to A bus

L

H

A data to B bus

H

X

Isolation

Copyright

 2008, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

DW OR PW PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

DIR

A1

A2

A3

A4

A5

A6

A7

A8

GND

OE

B1

B2

B3

B4

B5

B6

B7

B8