FST3126MTCX

Signal Switches, Multiplexers, Decoders Overview

The FST3126MTCX is a 4-bit bus switch IC manufactured by onsemi, housed in a 14-lead Thin Shrink Small Outline Package (TSSOP). It operates within a supply voltage range of 4.0V to 5.5V and supports an operating temperature from -40°C to +85°C. The device features four independent 1-bit switches with separate output enable inputs. Key electrical characteristics include a typical on-resistance of 4Ω at 4.5V and a maximum propagation delay of 0.25ns.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides four high-speed CMOS TTL-compatible bus switches for signal routing
• Features low on-resistance to minimize propagation delay and ground bounce noise
• Offers zero bounce operation in flow-through mode
• Control inputs are compatible with standard TTL logic levels

Signal Switches, Multiplexers, Decoders Applications

• High-speed data bus switching applications
• Signal routing between different voltage domains
• Portable equipment requiring low power consumption

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the package type matches the TSSOP-14 specification when sourcing. Confirm that the suffix 'X' indicates tape and reel packaging if required for automated assembly. Ensure the ordering code aligns with current onsemi nomenclature standards following Fairchild Semiconductor integration updates.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for designs requiring minimal signal distortion and low quiescent current. The 4Ω on-resistance makes it suitable for maintaining signal integrity across short distances. Verify that the input voltage levels remain within the specified 0V to 5.5V range for reliable operation.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the FST3126 family of 4-bit bus switches originally developed by Fairchild Semiconductor. The product line is now managed by onsemi following corporate integration. The specific MTCX variant denotes the TSSOP package configuration with tape and reel shipping options.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include other 4-bit bus switches with similar pinouts and electrical specifications. Verify compatibility regarding on-resistance values and propagation delays before substitution.