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FSTD16861MTD Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part # FSTD16861MTD
Description  20-Bit Bus Switch with Level Shifting
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FSTD16861MTD Datasheet(HTML) 1 Page - Fairchild Semiconductor

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© 2001 Fairchild Semiconductor Corporation
DS500421
www.fairchildsemi.com
May 2001
Revised May 2001
FSTD16861
20-Bit Bus Switch with Level Shifting
General Description
The Fairchild Switch FSTD16861 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. A diode to VCC has been
integrated into the circuit to allow for level shifting between
5V inputs and 3.3V outputs.
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.
Features
s 4
Ω 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.
s TruTranslation
 voltage translation from 5.0V inputs to
3.3V outputs
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Logic Diagram
Truth Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
Z
= High Impedance
TruTranslation
 is trademark of Fairchild Semiconductor Corporation.
Order Number
Package Number
Package Description
FSTD16861MTD
MTD48
48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Pin Name
Description
OE1, OE2
Bus Switch Enables
1An, 2An
Bus A
1Bn, 2Bn
Bus B
Inputs
Inputs/Outputs
OE1
OE2
1A, 1B
2A, 2B
LL
1A
= 1B
2A
= 2B
LH
1A
= 1B
Z
HL
Z
2A
= 2B
HH
Z
Z


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