Fairchild FST162861 Data Handbook
Summary
This 20-bit CMOS TTL-compatible bus switch provides high-speed, low-noise signal routing utilizing embedded series resistors to eliminate external termination requirements and reduce ground bounce. This manual details all critical operating parameters, including DC/AC electrical characteristics, absolute maximum ratings, and timing specifications necessary for reliable integration into your circuit designs. It is essential documentation for electronics engineers and hardware designers implementing advanced bus switching solutions requiring minimal propagation delay and high signal integrity.
Page 1 Text Content
查询FST162861供应商
162861 20-B it B s S itch ith 25Ω eries R esisto rs in tp ts
March 2000 Revised March 2000
FST162861 20-Bit Bus Switch with 25Ω Series Resistors in Outputs
equivalent 25Ω series resistors to reduce signal-reflection
General Description
noise, eliminating the need for external terminating resis-
The Fairchild Switch FST162861 provides 20-Bits of high-
tors.
speed CMOS TTL-compatible bus switching. The low on resistance of the switch allows inputs to be connected to
Features
outputs without adding propagation delay or generating
additional ground bounce noise. 25Ω switch connection between two ports. The device is organized as a 10-bit or 20-Bit bus switch. Minimal propagation delay through the switch.
When OE1 is LOW, the switch is ON and Port 1A is con- Low l CC. nected to Port 1B. When OE2 is LOW, Port 2A is connected
Zero bounce in flow-through mode.
to Port 2B. When OEX is HIGH, a high impedance state
Control inputs compatible with TTL level.
exists between the A and B ports. The FST162861 has an
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
Truth Table Inputs Inputs/Outputs
Pin Descriptions
OE1 OE2 1A, 1B 2A, 2B
Pin Name Description 1A = 1B 2A = 2B 1A = 1B
OE1, OE2 Bus Switch Enables
1A, 2A Bus A 1B, 2B Bus B
© 2000 Fairchild Semiconductor Corporation DS500319 www.fairchildsemi.com
Page Summary Contents For Fairchild FST162861 Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 4 |
| File Size | 82.92 KB |
| Published | July 16, 2026 |
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Frequently Asked Questions
What is the primary function of the FST162861 switch?
It provides 20-Bits of high-speed CMOS TTL-compatible bus switching.
How does the device manage signal reflections?
It incorporates 25Ω series resistors in its outputs to reduce signal reflection and eliminate the need for external terminating resistors.
Under what condition is the switch active (ON)?
The switch is ON when the Output Enable (OE) pin is set LOW. Otherwise, it exists in a high impedance state.