BU21010MUV-E2

Overview

The BU21010MUV-E2 is a capacitive sensor switch control IC manufactured by ROHM Semiconductor. It features an 8-channel serial interface and operates within a supply voltage range of 1.7 V to 3.3 V, with a typical operating voltage of 3.0 V. The device is housed in a VQFN-16 package (VQFN016V3030) and supports surface mount installation. It functions across a temperature range from -40°C to +85°C. The component utilizes a serial communication protocol for host interfacing and includes integrated power management capabilities.

Feature Summary

• Integrates gesture detection functionality using four specific sensor ports to identify direction, duration, and speed of finger presses.
• Supports automatic offset correction calibration between reference and sensor capacitances to maintain stability over time.
• Includes configurable noise filtering and chattering cancellation mechanisms to improve signal reliability.
• Features dual power supply pins for digital and analog blocks to minimize common impedance noise.

Applications

• Capacitive touch switch controllers for consumer electronics
• Gesture recognition interfaces requiring directional input detection
• Low-power embedded systems utilizing intermittent operation modes

Procurement Notes

Verify the current lifecycle status as the component is designated as obsolete or end-of-life. Confirm availability through authorized distributors, noting that stock may be limited or restricted. Ensure compliance with RoHS directives and check for any specific environmental documentation required for integration into final products.

Selection Notes

Select this IC when designing systems requiring capacitive sensing with gesture support. Ensure the PCB layout accommodates separate analog and digital power domains. Verify that the overlay material thickness does not exceed recommended limits to maintain sensitivity. Consider the calibration requirements for paired sensor channels during the initial design phase.

Part Context

This component belongs to the BU21010MUV series of capacitive sensor control ICs. It is designed to reduce host CPU load by integrating sensor data processing. The E2 suffix indicates packaging in embossed tape and reel format with a quantity of 3000 pieces per reel.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the end-of-life status, alternative components must be evaluated based on channel count, interface compatibility, and package dimensions.

FAQ

Which sensor ports support the gesture function?

Only SIN0, SIN2, SIN4, and SIN6 have the gesture function capability; these cannot be changed to other sensor ports.

How does the calibration process work for odd-numbered ports?

Odd ports do not perform direct calibration but use the results executed by their paired even-numbered ports (e.g., SIN1 uses SIN0's calibration result).

What is the recommended power supply sequence?

Power should be applied to DVDD first, then AVDD, or simultaneously. Applying AVDD before DVDD may prevent proper initialization.