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Product Detailed Parameters
- Description：SPST, 2 FUNC, 1 CHANNEL, CMOS, P
- 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-VFSOP (0.091", 2.30mm Width)
- Supplier Device Package：US8
- Number of Circuits：2
- Grade：-
- Qualification：-
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Overview
The NC7WB66K8X is a TinyLogic ultra high-speed (UHS) dual single-pole/single-throw (SPST) analog switch or 2-bit bus switch fabricated with advanced sub-micron CMOS technology. It operates within a broad VCC range of 1.65V to 5.5V, featuring typical on-resistance of 7Ω at 5V and a -3dB bandwidth exceeding 300MHz. The device includes independent CMOS-compatible enable controls that tolerate voltages up to 5.5V regardless of the supply voltage. It supports rail-to-rail signal handling and provides power-down high-impedance control inputs.
Feature Summary
- Ultra high-speed performance with greater than 300 MHz -3dB bandwidth for rapid switching applications
- Broad operating voltage range from 1.65V to 5.5V supporting low-voltage digital systems
- Independent enable controls tolerant up to 5.5V, allowing flexible logic interfacing
- Rail-to-rail signal handling capability suitable for both analog and digital signal routing
Applications
- Analog and digital signal switching in portable electronic devices
- Bus switching for data lines in low-voltage communication interfaces
- Signal path selection in battery-powered consumer electronics
Procurement Notes
Verify component authenticity through authorized Fairchild Semiconductor distributors. Confirm RoHS compliance status and lead-free packaging specifications against current datasheet revisions. Ensure storage conditions adhere to moisture sensitivity level requirements prior to assembly.
Selection Notes
Select this component when designing circuits requiring low on-resistance and high bandwidth in compact surface-mount packages. Evaluate the 1.65V minimum supply requirement against system power rails. Consider the US8 package dimensions for PCB layout constraints compared to alternative MicroPak options.
Part Context
This part belongs to the Fairchild TinyLogic family of ultra high-speed logic switches. It serves as a direct replacement for the FSA266 series, offering comparable electrical characteristics within the same low-voltage operational envelope. The K8X suffix denotes the specific US8 surface-mount package configuration.
Replacement Considerations
The FSA266 is a confirmed functional substitute with identical electrical specifications. Verify pinout compatibility and package dimensions before substitution to ensure mechanical fit within the existing design.
