HV2818/R4X

Analog Switches, Multiplexers, Demultiplexers Overview

The HV2818/R4X is a high-voltage analog switch featuring 32 channels configured as sixteen 2:1 multiplexers. It operates with a single +5V bias supply while passing ±100V pulsed signals up to 2.5 μs width. The device utilizes an asymmetric topology for compact size and low harmonic distortion. Key electrical parameters include a typical 6 Ω on-resistance, 50 MHz small-signal bandwidth, and 66 MHz serial clock frequency. It is housed in a 64-lead 9x9 mm QFN package.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Asymmetric switch topology enabling compact design without high-voltage bias supplies
• Integrated digital serial interface supporting cascaded daisy-chain configurations
• Low parasitic capacitance and excellent noise immunity for signal integrity

Analog Switches, Multiplexers, Demultiplexers Applications

• Medical ultrasound imaging systems
• Non-destructive testing metal flaw detection
• Piezoelectric transducer drivers
• Inkjet printer heads
• Optical MEMS modules

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix R4X against official Microchip documentation to confirm packaging details. Ensure compatibility with the required operating temperature range of 0°C to +70°C. Confirm that the application circuitry respects the asymmetric topology constraints regarding SW pin voltage during the OFF state.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when designing systems requiring high-voltage switching controlled by low-voltage logic. Consider the HV2918 variant if integrated bleed resistors are necessary to eliminate voltage build-up on capacitive loads like piezoelectric transducers. Ensure the power-up sequence applies VLL before VDD to prevent latch-up or damage.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the HV2xxx family of low-voltage bias high-voltage switches. It serves as a direct replacement for previous generations like the HV2801 but offers improved performance through reduced size and lower charge injection. The R4X designation specifically identifies the 64-lead Very Thin Plastic Quad Flat, No Lead (QFN) package configuration.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The HV2918 is a functional alternative within the same series, distinguished by the inclusion of integrated bleed resistors at the SW pins. Both devices share identical pinouts and control logic, allowing for potential interchangeability depending on whether bleed resistor functionality is required for the specific load.