FST16209CW View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
FST16209CW Datasheet PDF : 5 Pages
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September 1997
Revised December 1999
FST16209
18-Bit Bus Exchange Switch
General Description
The Fairchild Switch FST16209 provides 18-bits of high-
speed CMOS TTL-compatible bus switching or exchang-
ing. 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 18-bit bus switch or a 9-bit bus
exchanger, which allows data exchange between the four
signal ports via the data-select terminals.
Features
s 4Ω switch connection between two ports.
s Minimal propagation delay through the switch.
s Low lCC.
s Zero bounce in flow-through mode.
s Control inputs compatible with TTL level.
Ordering Code:
Order Number Package Number
Package Description
FST16209MEA
MS48A
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide
FST16209MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Connection Diagram
Truth Table
S2 S1 S0 A1 A2
LLLZZ
L
L
H B1 Z
L
H
L B2 Z
L
H
H
Z B1
H
L
L
Z B2
HLHZZ
H
H
L
B1 B2
H
H
H B2 B1
Function
Disconnect
A1 = B1
A1 = B2
A2 = B1
A2 = B2
Disconnect
A1 = B1, A2 = B2
A1 = B2, A2 = B1
Pin Descriptions
Pin Name
S2, S1, S0
A1, A2
B1, B2
Description
Data-select inputs
Bus A
Bus B
© 1999 Fairchild Semiconductor Corporation DS500056
www.fairchildsemi.com
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