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FSA266L8X
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Product Detailed Parameters
- Description：LOW VOLTAGE DUAL SPST NORMALLY O
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Switch Circuit：SPST - NO
- Multiplexer/Demultiplexer Circuit：1:01
- On-State Resistance (Max)：10Ohm
- Channel-to-Channel Matching (ΔRon)：200mOhm
- Voltage - Supply, Single (V+)：1.65V ~ 5.5V
- Voltage - Supply, Dual (V±)：-
- Switch Time (Ton, Toff) (Max)：3.2ns, 4.1ns
- -3db Bandwidth：300MHz
- Charge Injection：-
- Channel Capacitance (CS(off), CD(off))：5pF
- Current - Leakage (IS(off)) (Max)：100nA
- Crosstalk：-70dB @ 10MHz
- 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 FSA266L8X is an ultra high-speed dual single-pole/single-throw (SPST) analog switch manufactured by Fairchild Semiconductor. It features two independent SPST-NO switch circuits within a single package. The device offers a maximum on-state resistance of 10 Ohms and provides a -3dB bandwidth of 300MHz, supporting high-frequency signal routing. Key electrical specifications include a cross-talk performance of -70dB at 10MHz, an off-state leakage current of 100nA maximum, and an off-state capacitance of 5pF per channel. The component operates within a temperature range of -40°C to 85°C.
Feature Summary
- Dual SPST analog switch configuration for efficient bus switching
- Ultra high-speed operation with 300MHz bandwidth
- Low on-state resistance for minimal signal loss
- High isolation with low off-state capacitance and leakage
Applications
- Portable multimedia devices
- LCD panel protection circuits
- Signal routing in communication equipment
- Bus switching applications
Procurement Notes
Verify the specific manufacturer source, as Fairchild Semiconductor's semiconductor division has undergone corporate restructuring and acquisition by ON Semiconductor. Confirm that the supplier provides authentic components from the original Fairchild production line or authorized legacy stock. Check for any obsolescence notices or end-of-life declarations associated with this specific part number before finalizing procurement orders.
Selection Notes
Select the FSA266L8X when dual-channel high-speed analog switching is required in space-constrained designs. Its 8-pin MicroPak package suits surface-mount applications. Ensure the operating voltage and signal levels align with the specified limits. Consider the 10 Ohm on-resistance impact on signal integrity for high-frequency applications compared to lower-resistance alternatives.
Part Context
This component belongs to the FSA266 series of low-voltage dual SPST normally open switches. It is functionally equivalent to the NC7WB66 part number. The series is designed for portable applications requiring fast switching speeds and low power consumption. The L8X suffix typically denotes the specific tape-and-reel packaging format for automated assembly.
Replacement Considerations
The NC7WB66 is a confirmed functional substitute with identical specifications. Verify pinout compatibility and package dimensions when replacing. Since the product is marked obsolete, ensure alternative sources are available or qualify equivalent parts from other manufacturers offering similar dual SPST analog switches.
