Fairchild FST16862 service manual
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FST16862
20-Bit Bus Switch
FST16862 20-Bit Bus Switch
October 2001
Revised February 2002
General Description
The Fairchild Switc h FST16862 provides 20-bits of highspeed 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 organ ized as a 20 -bi t bus sw itch. When OE
is LOW, the switch is ON and Port A is connected to Port B.
When OE
between the A and B Ports.
is HIGH, a high impedance state exists
X
Features
■ 4Ω switch connection between two ports.
■ Minimal propagation delay through the switch.
■ Low l
■ Zero bounce in flow-through mode.
■ Control inputs compatible with TTL level.
X
.
CC
Ordering Code:
Order Number
FST16862QSP MQA48A
FST16862MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also availab le in Tape and Reel. Specify by appending the suffix letter “X” to the o rdering code.
Package
Number
(Preliminary)
Package Description
48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide
Logic Diagram
© 2002 Fairchild Semiconductor Corporation DS500702 www.fairchildsemi.com
Connection Diagram Truth Table
FST16862
Pin Descriptions
Inputs Inputs/Outputs
OE
x
LA
HZ
Pin Name Description
OE
x
ABus A
BBus B
A, B
= B
Bus Switch Enables
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