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FST32245MTC Datenblatt(PDF) 1 Page - Fairchild Semiconductor

Teilenummer FST32245MTC
Bauteilbeschribung  Octal Bus Switch with 25??Series Resistor in Outputs (Preliminary)
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Hersteller  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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Preliminary
© 2001 Fairchild Semiconductor Corporation
DS500473
www.fairchildsemi.com
June 2001
Revised June 2001
FST32245
Octal Bus Switch with 25
Ω Series Resistor in Outputs
(Preliminary)
General Description
The Fairchild Switch FST32245 provides 8-bits of high-
speed CMOS TTL-compatible bus switching in a standard
’245 pin-out. The low On Resistance of the switch allows
inputs to be connected to outputs without adding propaga-
tion delay or generating additional ground bounce noise.
The device is organized as an 8-bit switch. When OE is
LOW, the switch is ON and Port A is connected to Port B.
When OE is HIGH, the switch is OPEN and a high-imped-
ance state exists between the two ports.
The FST32245 has an equivalent 25
Ω series resistors to
reduce signal-reflection noise, eliminating the need for
external terminating resistors.
Features
s 25
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
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Pin Descriptions
Connection Diagram
Truth Table
Order Number
Package Number
Package Description
FST32245WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
FST32245QSC
MQA20
20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
FST32245MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Name
Description
OE
Bus Switch Enable
ABus A
BBus B
NC
No Connect
Input OE
Function
L
Connect
H
Disconnect


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