BU21008MUV-E2

Overview

The BU21008MUV-E2 is a capacitive sensor switch control IC from ROHM Semiconductor, designed to process sensor data and reduce host CPU load. It features 16 sensor channels with an I2C serial interface in a VQFN-32 package. The device supports gesture detection using four specific ports (SIN0, SIN2, SIN4, SIN6) and includes LED/PWM output capabilities. It operates within a temperature range of -40°C to +85°C and utilizes separate DVDD and AVDD power supplies.

Feature Summary

• Integrates sensor data processing and application functions to minimize host processor workload.
• Supports gesture detection for direction, duration, and speed across designated sensor ports.
• Includes LED link and PWM functions for brightness control and fade effects.
• Features power management modes including normal, idle, and calibration states.

Applications

• Capacitive touch switch controllers
• Gesture recognition interfaces
• LED control systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for End-of-Life notifications prior to procurement. Ensure ordering suffixes match required packaging specifications.

Selection Notes

Select this IC for applications requiring integrated capacitive sensing with gesture support. Evaluate PCB layout requirements for parasitic capacitance management. Consider the need for separate analog and digital power supply domains during system design.

Part Context

This component belongs to the BU21008 series of capacitive sensor control ICs. It is part of ROHM's portfolio of sensors that integrate signal processing to simplify host controller design. The MUV package denotes a VQFN form factor suitable for surface mount assembly.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult ROHM technical support for potential alternatives if this component is discontinued or unavailable.

FAQ

Which sensor ports support gesture detection?

Only SIN0, SIN2, SIN4, and SIN6 support the gesture function. These ports cannot be changed to other sensor ports for this feature.

How does the calibration function work on the BU21008MUV?

Calibration can only be executed on even-numbered ports (e.g., SIN0, SIN2). Odd-numbered ports use the calibration results from their paired even ports.

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.