Key facts
- Brand
- Fairchild
- Model
- FST3257
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-07
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Fairchild FST3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch Datasheet
The Fairchild FST3257 is a quad 2:1 high-speed CMOS TTL-compatible multiplexer/demultiplexer bus switch. It features minimal propagation delay and allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. When the OE pin is LOW, the select pin connects the A Port to the selected B Port output; when OE is HIGH, a high-impedance state exists between the two ports.
The device operates with a power supply voltage (Vcc) of 4.0V to 5.5V and an input/output voltage range of -0.5V to +7.0V under absolute maximum ratings. It is available in three package types: 16-Lead Small Outline Integrated Circuit (SOIC), 16-Lead Quarter Size Outline Package (QSOP), and 16-Lead Thin Shrink Small Outline Package (TSSOP).
Fairchild FST3257 specifications
| Operating Temperature Range | -40 to +85°C |
|---|---|
| Switch On Resistance | 4 Ω typical at 64mA |
| Quiescent Supply Current (ICC) | 3 µA typical |
| Propagation Delay | 0.25 ns max (Bus to Bus) |
Source: Fairchild FST3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch Datasheet
All Fairchild FST3257 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What happens when the OE pin is HIGH?
When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports.
From: Fairchild FST3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch Datasheet
What is the maximum supply voltage for this device?
The absolute maximum rating for the supply voltage (Vcc) is +7.0V.
From: Fairchild FST3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch Datasheet
What is the logic level for enabling the switch?
The switch connects A port to B port when /OE is LOW.
From: Fairchild FST3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch Datasheet
What happens when /OE is HIGH?
The switch enters an OPEN state with a high-impedance condition between ports.
From: Fairchild FST3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch Datasheet