FSAT66P5X

Overview

The FSAT66P5X is a low-voltage single pole/single throw (SPST) normally open analog switch fabricated on a sub-micron CMOS process. It features a TTL-compatible control input and operates within a supply voltage range of 1.65V to 5.5V. The device provides rail-to-rail signal handling with an on-resistance as low as 5Ω at VCC=3.0V. Key electrical parameters include a propagation delay of 0.7ns typical at 3.3V, off-isolation greater than -50dB at 10MHz, and a -3dB bandwidth exceeding 250MHz. Quiescent supply current is typically 10µA. It is housed in a space-saving 5-lead SC70 package.

Feature Summary

• TTL compatible control input for direct interfacing with standard logic levels
• Rail-to-rail signal handling capability across the full operating voltage range
• Ultra-low on-resistance enabling minimal propagation delay without ground bounce noise
• High-speed performance with over 250MHz bandwidth and zero bounce in flow-through mode

Applications

• Portable equipment requiring low power consumption and small footprint
• Battery-powered systems utilizing low voltage operation
• Signal routing in communication devices
• Multiplexing applications in consumer electronics

Procurement Notes

Verify the specific ordering suffix 'P5X' corresponds to the 5-lead SC70 package configuration when sourcing components. Confirm that the manufacturer designation aligns with Fairchild Semiconductor or its successor entities such as ON Semiconductor, as production rights may have transferred. Ensure documentation references the correct datasheet revision DS500862 for accurate electrical specifications and mechanical dimensions.

Selection Notes

Select this component for designs requiring a single-channel analog switch with TTL-compatible enable signals. The SC70 package is suitable for high-density PCB layouts where space is constrained. Consider the on-resistance variation based on the specific input voltage and load current requirements defined in the DC Electrical Characteristics table. Ensure the operating temperature range of -40°C to +85°C meets the environmental conditions of the target application.

Part Context

The FSAT66 series includes variants such as the FSAT66M5X in a SOT23-5 package and the FSAT66L6X in a MicroPak-6 package. All variants share the same core functionality but differ in physical package dimensions and thermal characteristics. The P5X suffix specifically denotes the SC70 package variant, which offers a 1.25mm width compared to other packages in the family.

Replacement Considerations

Direct pin-compatible alternatives within the same family include the FSAT66M5X and FSAT66L6X, provided the package change is acceptable. Other single SPST analog switches from different manufacturers may require schematic redesign due to differing pinouts or control logic polarity.