FST162861MTD(2000) View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
View to exact match
FST162861MTD
(Rev.:2000)
(Rev.:2000)
Fairchild Semiconductor
FST162861MTD Datasheet PDF : 4 Pages
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March 2000
Revised March 2000
FST162861
20-Bit Bus Switch with 25Ω Series Resistors in Outputs
General Description
The Fairchild Switch FST162861 provides 20-Bits of high-
speed CMOS TTL-compatible bus switching. 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 is organized as a 10-bit or 20-Bit bus switch.
When OE1 is LOW, the switch is ON and Port 1A is con-
nected to Port 1B. When OE2 is LOW, Port 2A is connected
to Port 2B. When OEX is HIGH, a high impedance state
exists between the A and B ports. The FST162861 has an
equivalent 25Ω series resistors to reduce signal-reflection
noise, eliminating the need for external terminating resis-
tors.
Features
s 25Ω 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
FST162861MTD
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.
Connection Diagram
Logic Diagram
Pin Descriptions
Pin Name
OE1, OE2
1A, 2A
1B, 2B
Description
Bus Switch Enables
Bus A
Bus B
Truth Table
Inputs
OE1
OE2
L
L
L
H
H
L
H
H
Inputs/Outputs
1A, 1B
1A = 1B
1A = 1B
Z
Z
2A, 2B
2A = 2B
Z
2A = 2B
Z
© 2000 Fairchild Semiconductor Corporation DS500319
www.fairchildsemi.com
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