HV2721/R4X

Analog Switches, Multiplexers, Demultiplexers Overview

The HV2721/R4X is a 300V, low-charge injection, 16-channel high-voltage analog switch manufactured by Microchip Technology. It operates with a logic supply voltage (VDD) of 3V to 5.5V and supports differential supply voltages (VPP-VNN) up to 300V. The device features a serial interface with a clock frequency up to 33 MHz at 5.0V VDD. It includes integrated bleed resistors on both sides of the switches, with a typical resistance value of 50 kΩ. The package is a 64-lead Very Thin Plastic Quad Flat, No Lead (QFN) measuring 9x9 mm.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Integrated bleed resistors on both sides of the switches to eliminate voltage build-up on capacitive loads
• Cascadable serial data register with latches for simultaneous state changes
• Low quiescent current consumption of 10 µA
• Excellent noise immunity with -60 dB typical off isolation at 5.0 MHz

Analog Switches, Multiplexers, Demultiplexers Applications

• Medical Ultrasound Imaging
• Nondestructive Testing (NDT) Metal Flaw Detection
• Multi-Layer Printed Circuit Board (PCB) Tester
• Piezoelectric Transducer Drivers
• Inkjet Printer Head

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific ordering suffix R4X corresponds to the 64-lead QFN package configuration. Confirm that the required application utilizes the dual-side bleed resistor feature unique to the HV2721 variant compared to other family members. Ensure power supply sequencing adheres to the recommended guidelines to maintain device reliability during operation.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when high-voltage switching up to 300V is required alongside low-voltage CMOS control signals. The HV2721 is specifically chosen over the HV2722 or HV2621 when bleed resistors are needed on both terminals of every channel to prevent charge accumulation in capacitive loads like piezoelectric transducers.

Analog Switches, Multiplexers, Demultiplexers Part Context

The HV2721 belongs to the HV2621/HV2721/HV2722 family of high-voltage analog switches. It shares identical electrical characteristics and pinouts with the HV2621 and HV2722, differing primarily in the presence and placement of internal bleed resistors. This family utilizes HVCMOS technology to combine high-voltage bilateral DMOS switches with low-power CMOS logic.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

HV2722/R4X: Identical package and logic interface but features bleed resistors on only one side (SWxA). HV2621/R4X: Identical package and logic interface but lacks integrated bleed resistors entirely.