© Semiconductor Components Industries, LLC, 2001

August, 2001 – Rev. 0

1

Publication Order Number:

74FST3245/D

74FST3245

8-Bit Bus Switch

The ON Semiconductor 74FST3245 is an 8–bit, high performance

switch. The device is CMOS TTL compatible when operating between

nearly zero propagation delay. The device adds no noise or ground

bounce to the system.

The device consists of an 8–bit switch. Port A is connected to Port B

when OE is low. If OE is high, the switch is high Z.

ON

t 4 W Typical

NC

OE

1

2

3

4

5

6

7

20

19

18

17

16

15

14

Figure 1. 20–Lead Pinout

8

9

GND

10

13

12

11

L

H

Input OE

Function

Connect

Disconnect

TRUTH TABLE

2

19

9

18

11

OE

Figure 2. Logic Diagram

Description

PIN NAMES

1A, 2A

http://onsemi.com

Device

Package

Shipping

ORDERING INFORMATION

74FST3245DW

SO–20

38 Units/Rail

74FST3245DWR2

SO–20

74FST3245DT

TSSOP–20

1000 Units/Reel

75 Units/Rail

74FST3245DTR2

TSSOP–20

2500 Units/Reel

74FST3245QS

QSOP–20

55 Units/Rail

74FST3245QSR

QSOP–20

2500 Units/Reel

TSSOP–20

DT SUFFIX

CASE 948E

SO–20

DW SUFFIX

CASE 751D

20

MARKING

DIAGRAMS

Pin

Bus Switch Enables

Bus A

1B, 2B

Bus B

20

1

1

FST3245

AWLYYWW

1

20

20

1

FST

3245

ALYW

A

= Assembly Location

L, WL

= Wafer Lot

Y

= Year

W, WW = Work Week

QSOP–20

QS SUFFIX

CASE 492A

1

20

FST3245

AWLYWW

20

1