BU21009MUV-E2

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The BU21009MUV-E2 is a miniature, low-power, capacitive touch key controller IC featuring 1-channel, wide range of applications.

The BU21009MUV-E2 uses a proprietary state machine based on a Finite State Machine (FSM) to detect user input and provide response times of 12 ms or less. This makes it possible to react quickly to user input while also allowing for small size and low power operation. The FSM engine supports up to 12 keys and requires no external components to operate.

BU21009MUV-E2 is a single-channel capacitive touch circuit controller IC having low standby current with 2V to 5.5V power supply. The BU21009MUV-E2 is an ideal IC for applications including digital home appliances, remote control panels and medical devices. It also finds wide application in automotive multimedia systems, white goods, office automation systems and many more.

BU21009MUV-E2 is easy to integrate with a few external components. It can be used for single and multi-key applications and has a built-in charge time counter for touch time measurement. It also contains Schmitt triggers for both edge level sensing and trigger levels for detecting key touches.

The BU21009MUV-E2 works on the principle of capacitive sensing. The capacitance or touch of the sensor is sensed by a charge-transfer circuit. As the user’s finger approaches an associated pad, the capacitance between the finger and pad increases. This is sensed by the charge-transfer circuit and the FSM engine interprets the touch. Upon receiving the appropriate input signal, the circuit begins an initiates an appropriate response.

The main features of BU21009MUV-E2 are: low power consumption, low voltage operation, low EMI noise, high-accuracy different key detection, easy integration, high immunity to crosstalk, and external reset control.

The BU21009MUV-E2 is used for capacitive sensing applications in many industries such as medical, automotive, home appliance and more. It is ideal for applications requiring a single channel capacitive touch controller IC. The BU21009MUV-E2 offers an easy-to-integrate solution with a wide range of functionality and an impressive level of performance.

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