May 2012

© 2001 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FSTD3125 • Rev. 1.0.3

FSTD3125 — 4-Bit Bus Switch with Level Shifting

Features

CC

to 3.3V Outputs

Description

Fairchild switch FSTD3125 provides four high-speed

CMOS TTL-compatible bus switches. The low on

resistance of the switch allows inputs to be connected to

outputs without adding propagation delay or generating

been integrated into the circuit to allow for level shifting

between 5V inputs and 3.3V outputs.

The device is organized as four one-bit switches with

separate /OE inputs. When /OE is LOW, the switch is

ON and port A is connected to port B. When /OE is

HIGH, the switch is OPEN and a high-impedance state

exists between the two ports.

Ordering Information

Part Number

Operating

Temperature

Range

Package

Packing

Method

FSTD3125MTCX

-40 to 85°C

14-Lead, Thin Shrink Small Outline Package (TSSOP), JEDEC

MO-153, 4mm Wide

Tape and Reel

1A

4A

3A

2A

1B

2B

3B

4B

1

23

4

56

8

10

9

13

11

12

Figure 1. Logic Diagram