FSA2257MTCX

Analog Switches, Multiplexers, Demultiplexers Overview

The FSA2257MTCX is a low-voltage dual Single-Pole/Double-Throw (SPDT) bi-directional analog switch manufactured by onsemi. It operates within a supply voltage range of 1.65 V to 5.50 V and features a maximum on-resistance of 1.3 Ohms at 4.5 V VCC. The device utilizes submicron CMOS technology for fast switching, with a maximum turn-on time of 35 ns and a maximum turn-off time of 15 ns. It supports a DC switch current of 200 mA and has a maximum power supply current of 500 nA. The component is housed in a MicroPak-10 surface-mount package and functions across an operating temperature range from -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Bi-directional signal path capability allows flexible configuration as multiplexer or demultiplexer via select pins.
• Ultra-low on-resistance ensures minimal signal attenuation in low-voltage applications.
• Break-before-make enable circuitry prevents signal overlap during switching transitions.
• TTL-compatible control inputs simplify interface with standard logic families.

Analog Switches, Multiplexers, Demultiplexers Applications

• Cell phone signal routing
• Personal Digital Assistant (PDA) peripheral switching
• Mobile device antenna selection

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix MTCX against the official datasheet to confirm the MicroPak-10 packaging and tape-and-reel delivery format. Confirm RoHS compliance status through the manufacturer's current documentation. Check for obsolescence notices as the product lifecycle status may indicate end-of-life phases. Ensure the source document explicitly lists this part number variant rather than generic family members.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when designing circuits requiring dual SPDT switching with low voltage operation below 3.3 V. The 1.3 Ohm maximum on-resistance makes it suitable for maintaining signal integrity in portable electronics. Verify that the required switching speed meets the 35 ns turn-on specification. Ensure the application environment stays within the specified -40°C to +85°C temperature range for reliable performance.

Analog Switches, Multiplexers, Demultiplexers Part Context

The FSA2257 belongs to onsemi's portfolio of low-power analog switches designed for space-constrained mobile devices. It is part of the FSA2257 series, which emphasizes low on-resistance and wide operating voltage ranges. This specific variant integrates two independent SPDT switches into a compact MicroPak-10 package, optimizing board space for handheld consumer electronics.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official replacement guide or contact technical support for qualified alternatives if this component becomes unavailable.