FST3306 Datasheet, PDF (1/5 Pages) Fairchild Semiconductor – 2-Bit Low Power Bus Switch

February 2001
Revised February 2001
FST3306
2-Bit Low Power Bus Switch
General Description
The FST3306 is a 2-bit ultra high-speed CMOS FET bus
switch with TTL-compatible active LOW control inputs. The
low on resistance of the switch allows inputs to be con-
nected to outputs with minimal propagation delay and with-
out generating additional ground bounce noise. The device
is organized as a 2-bit switch with independent bus enable
(BE) controls. When BE is LOW, the switch is ON and
Port A is connected to Port B. When BE is HIGH, the
switch is OPEN and a high-impedance state exists
between the two ports. Control inputs tolerate voltages up
to 5.5V independent of V_CC.
Features
s Typical 3Ω switch resistance at 5.0V V_CC
s Minimal propagation delay through the switch
s Power down high impedance input/output
s Zero bounce in flow through mode.
s TTL compatible active LOW control inputs
s Control inputs are overvoltage tolerant
Ordering Code:
Order Number Package Number
Package Description
FST3306MTC
MTC08
8-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
Pin Descriptions
Pin Name
A
B
BE
Description
Bus A
Bus B
Bus Enable Input
(Top View)
Function Table
Bus Enable Input BE
L
H
H = HIGH Logic Level
L = LOW Logic Level
Function
B Connected to A
Disconnected
© 2001 Fairchild Semiconductor Corporation DS500479
www.fairchildsemi.com