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FSA1257AL8X
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Product Detailed Parameters
- Description：IC SW SPST-NCX2 1.15OHM 8MICROPK
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Tape & Reel (TR),Cut Tape (CT)
- Switch Circuit：SPST - NC
- Multiplexer/Demultiplexer Circuit：1:01
- On-State Resistance (Max)：1.15Ohm
- Channel-to-Channel Matching (ΔRon)：60mOhm
- Voltage - Supply, Single (V+)：2.7V ~ 5.5V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：35ns, 15ns
- -3db Bandwidth：300MHz
- Charge Injection：20pC
- Channel Capacitance (CS(off), CD(off))：11.5pF
- Current - Leakage (IS(off)) (Max)：2nA (Typ)
- Crosstalk：-100dB @ 1MHz
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-UFQFN
- Supplier Device Package：8-MicroPak™
- Number of Circuits：2
- Grade：-
- Qualification：-
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Overview
The FSA1257AL8X is a dual single-pole single-throw (SPST) analog switch manufactured by onsemi. It operates within a supply voltage range of 1.65 V to 5.5 V and features a maximum on-resistance of 1.15 Ohms. The device supports a DC switch current of 200 mA with a maximum power dissipation of 180 mW. Electrical performance includes a maximum turn-on time of 35 ns and a maximum turn-off time of 15 ns. It functions reliably across an ambient temperature range from -40°C to +85°C. The component is housed in a MicroPak-8 surface-mount package.
Feature Summary
- Dual SPST configuration for independent signal routing
- Low on-resistance for minimal signal attenuation
- Single-supply operation compatible with low-voltage systems
Applications
- Portable consumer electronics signal switching
- Battery-powered device input/output multiplexing
- Mobile handset peripheral interface management
Procurement Notes
Verify the specific suffix 'L8X' against official manufacturer documentation to confirm package type and tape-and-reel specifications. Confirm end-of-life status, as related variants indicate potential obsolescence. Ensure RoHS compliance details are validated through the latest datasheet revision before finalizing procurement plans.
Selection Notes
Select this component when low on-resistance and compact packaging are required for dual-channel analog switching. Verify that the 1.15 Ohm resistance meets system loss requirements. Ensure the operating voltage aligns with the 1.65 V to 5.5 V range. Check thermal constraints against the 180 mW power dissipation limit in the MicroPak-8 package.
Part Context
This part belongs to the FSA1257 series of low-voltage analog switches. It shares functional similarities with other onsemi devices like the FSA1259A but differs in package and specific electrical characteristics. The series targets portable applications requiring small form factors and efficient power usage.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source material. Consult official cross-reference guides or distributor databases for verified alternatives.
