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FSA1258L8X
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Product Detailed Parameters
- Description：IC SWITCH SPST 1.15OHM 8MICROPAK
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Switch Circuit：SPST - NO/NC
- Multiplexer/Demultiplexer Circuit：1:01
- On-State Resistance (Max)：1.15Ohm
- Channel-to-Channel Matching (ΔRon)：60mOhm
- Voltage - Supply, Single (V+)：1.65V ~ 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 FSA1258L8X is a dual SPST analog switch manufactured by Fairchild Semiconductor, now part of ON Semiconductor. It features two independent single-pole single-throw switches in an 8-pin MicroPak package. The device supports low voltage operation and offers low on-resistance for signal routing applications. Key electrical parameters include an on-resistance typically around 1.15 ohms at specified conditions, ensuring minimal signal attenuation. The switch operates with a wide supply voltage range, accommodating various logic families. It is designed for high-speed data transmission and audio/video signal switching in portable electronic devices.
Feature Summary
- Dual independent SPST analog switch configuration
- Low on-resistance for efficient signal transmission
- Compact 8-pin MicroPak surface-mount package
- Compatible with low-voltage digital logic interfaces
Applications
- Portable multimedia devices
- Audio and video signal routing
- Data line protection and switching
- Cellular phone peripheral interfacing
Procurement Notes
Verify the manufacturer designation as Fairchild Semiconductor or ON Semiconductor, as corporate acquisitions may affect labeling. Confirm the package type is 8-MicroPak and check for specific suffix variations that might indicate tape-and-reel packaging or temperature grades. Ensure RoHS compliance documentation matches current regulatory requirements for your region.
Selection Notes
Select this component when a compact dual-channel analog switch is required for low-voltage applications. Compare on-resistance values against system signal integrity requirements. Verify that the input voltage range aligns with the control logic levels used in the design. Consider the thermal performance within the small MicroPak footprint during high-current switching operations.
Part Context
The FSA1258L8X belongs to the FSA12xx series of analog switches from Fairchild/ON Semiconductor. This family focuses on space-constrained portable electronics. Similar parts in the series may offer different channel counts or pin configurations. The MicroPak package is distinct for its ultra-small footprint compared to standard SOIC or TSSOP packages.
Replacement Considerations
Check for direct cross-reference part numbers from ON Semiconductor's current portfolio. Verify pin-to-pin compatibility if substituting with other dual SPST switches. Ensure equivalent on-resistance and leakage current specifications are met by alternative components.
