Fairchild FST3253 Data Handbook
Summary
The FST3253 is a high-speed dual 4:1 multiplexer/demultiplexer bus switch engineered for robust signal routing between two integrated ports. Featuring CMOS TTL compatibility and low on resistance, it ensures minimal propagation delay and reliable data switching in digital communication buses. This comprehensive manual provides engineers with all necessary technical details, including detailed electrical characteristics (AC/DC), logical diagrams, recommended operating conditions, and various packaging options (SOIC, QSOP, TSSOP), making it the ideal component for designing complex signal isolation and multiplexing systems.
Page 1 Text Content
查询FST3253供应商
3253 D al 4:1 M ltip lexer/D em ltip lexer B s S itch
September 1997 Revised December 1999
FST3253 Dual 4:1 Multiplexer/Demultiplexer Bus Switch General Description Features The Fairchild Switch FST3253 is a dual 4:1 high-speed ■4Ω switch connection between two ports. CMOS TTL-compatible multiplexer/demultiplexer bus
■Minimal propagation delay through the switch.
switch. The low on resistance of the switch allows inputs to
■Low l CC.
be connected to outputs without adding propagation delay
or generating additional ground bounce noise. ■Zero bounce in flow-through mode. When OE is LOW, S0 and S1 connect the A Port to the ■Control inputs compatible with TTL level.
selected B Port output. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports.
Ordering Code: Order Number Package Number Package Description FST3253M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow FST3253QSC MQA16 16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide FST3253MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Diagram Connection Diagram
Truth Table S1 S0 OE1 OE2 Function
Pin Descriptions
Disconnect 1A
Pin Name Description Disconnect 2A
OE1, OE2 Bus Switch Enables A = B1 S0, S1 Select Inputs A = B2 Bus A A = B3 B1, B2, B3, B4 Bus B A = B4
© 1999 Fairchild Semiconductor Corporation DS500058 www.fairchildsemi.com
Page Summary Contents For Fairchild FST3253 Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 5 |
| File Size | 137.32 KB |
| Published | July 06, 2026 |
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Frequently Asked Questions
What is the full function of the FST3253?
It is a dual 4:1 high-speed switch providing connection between two ports and functioning as a multiplexer/demultiplexer bus.
Are there different physical packages available for this chip?
Yes, it is available in SOIC (M16A), QSOP (MQA16), and TSSOP (MTC16) packages.
What are the recommended operating conditions for power supply?
The recommended operating voltage range for the power supply is 4.0V to 5.5V DC.
Can I use this device in life support systems?
No, Fairchild's products are not authorized for use as critical components in life support devices without express written approval.