BU8763FV-E2

Overview

The BU8763FV-E2 is a melody LSI designed for cellular phones, capable of generating triple chords simultaneously. It features three independent wave generators controlled via serial interface, allowing separate tone and volume adjustments. The device supports master clock inputs of 5.376 MHz or 2.688 MHz and offers selectable sine or special square wave outputs. It includes an integrated DTMF creation function, a smoothing filter with a cutoff frequency of 20 kHz, and a master volume control. Operating on a single supply voltage between 2.7 V and 3.6 V, it consumes typical current of 1.2 mA in operation and 2.0 µA in sleep mode. The component is housed in an SSOP-B16 package.

Feature Summary

• Simultaneous generation of three independent sound waves for triple chord playback
• Integrated DTMF creation function alongside standard melody synthesis capabilities
• Selectable output waveform types including sine wave and special square wave optimized for small speakers
• Built-in smoothing filter to reduce high-frequency noise from digital-to-analog conversion

Applications

• Melody sound generation during receiving or holding calls in cellular phones
• DTMF tone generation for keypad feedback
• Audio alert systems in mobile communication devices

Procurement Notes

Verify the specific suffix E2 against the manufacturer's latest documentation to confirm compliance with current environmental standards such as RoHS. Ensure that the serial interface timing parameters align with the host CPU specifications before finalizing integration into the design.

Selection Notes

Select this component when simultaneous multi-tone audio synthesis is required within a compact form factor. Consider the available master clock frequencies and the specific waveform requirements for the target speaker type. Verify that the serial control protocol matches the system microcontroller's capabilities.

Part Context

This part belongs to ROHM Semiconductor's Melody LSI family, specifically engineered for mobile communications. It integrates multiple wave generators and control logic into a single chip to reduce board space and simplify audio circuit design for handheld devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer directly for end-of-life notifications or recommended alternative components within the same product line.

FAQ

Can the three wave generators operate with different waveform types simultaneously?

No, all three sound resources must be set to either all sine waves or all special square waves; mixed waveform settings are not supported.

How is the output frequency determined for melody generation?

The output frequency is determined by the FREQ register setting (Address 2), which selects specific musical notes based on the selected master clock frequency.

What happens to the register data when the device enters sleep mode?

The data values in registers such as WAVE1, WAVE2, WAVE3, ATT123, and ENVON are retained while the device is in sleep mode.