FST3383 10-Bit Low Power Bus-Exchange Switch
December 1993
Revised May 1999
FST3383
10-Bit Low Power Bus-Exchange Switch
General Description
The FST3383 provides two sets of 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 additional ground
bounce noise. The device operates as a 10-bit bus switch
or a 5-bit bus exchanger. The bus exchange (BX) signal
provides nibble swapping of the AB and CD pairs of sig-
nals. This exchange configuration allows byte swapping of
buses in systems. It can also be used as a quad 2-to-1
multiplexer and to create low delay barrel shifters. The bus
enable (BE) signal turns the switches ON.
Features
s
5鈩?switch connection between two ports
s
Zero propagation delay
s
Ultra low power with 0.2
碌A
typical I
CC
s
Zero ground bounce in flow-through mode
s
Control inputs compatible with TTL level
Ordering Code:
Order Number
FST3383WM
FST3383QSC
FST3383MTC
Package Number
M24B
MQA24
MTC24
Package Description
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide
24-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 Diagram
Connection Diagram
Pin Descriptions
Pin Names
BE
BX
A
0
鈥揂
4
, B
0
鈥揃
4
C
0
鈥揅
4
, D
0
鈥揇
4
Description
Bus Switch Enable
Bus Exchange
Buses A, B
Buses C, D
Truth Table
BE BX
H
L
L
L
A
0
鈥揂
4
C
0
鈥揅
4
B
0
鈥揃
4
D
0
鈥?D
4
C
0
鈥揅
4
Function
Connect
Exchange
X High-Z State High-Z State Disconnect
H D
0
鈥揇
4
漏 1999 Fairchild Semiconductor Corporation
DS011652.prf
www.fairchildsemi.com
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