FST3306 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 3
鈩?/div>
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
FST3306MTC
Package Number
MTC08
Package Description
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 鈥淴鈥?to the ordering code.
Logic Symbol
Connection Diagram
(Top View)
Pin Descriptions
Pin Name
A
B
BE
Description
Bus A
Bus B
Bus Enable Input
Function Table
Bus Enable Input BE
L
H
H
=
HIGH Logic Level
L
=
LOW Logic Level
Function
B Connected to A
Disconnected
漏 2001 Fairchild Semiconductor Corporation
DS500479
www.fairchildsemi.com
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