© Semiconductor Components Industries, LLC, 2013

June, 2013 − Rev. 0

1

Publication Order Number:

FST3125/D

FST3125

4-Bit Bus Switch

The ON Semiconductor FST3125 is a quad, 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 four independent 1−bit switches with

separate Output/Enable (OE) pins. Port A is connected to Port B when

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

Features

GND

2B

2A

1B

1A

4B

3B

3A

4A

1

2

3

4

5

6

7

14

13

12

11

10

9

8

Figure 1. Pin Assignment for

SOIC and TSSOP

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

Description

PIN NAMES

1A, 2A, 3A, 4A

A

= Assembly Location

WL, L = Wafer Lot

Y

= Year

WW, W = Work Week

G or G

= Pb−Free Package

TSSOP−14

DT SUFFIX

CASE 948G

14

1

SOIC−14

D SUFFIX

CASE 751A

14

1

FST

3125

ALYWG

G

FST3125G

AWLYWW

14

1

MARKING

DIAGRAMS

Pin

Bus Switch Enables

Bus A

1B, 2B, 3B, 4B

Bus B

NC

Not Connected

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

ORDERING INFORMATION

1

14

http://onsemi.com

(Note: Microdot may be in either location)