Description

The BU9253FS-E2 is a special purpose audio IC, specifically designed for Karaoke echo and surround systems. It is a single chip solution that incorporates a digital delay circuit and an input/output mixing circuit. This IC offers various functions required for both Karaoke echo and surround systems, making it a versatile choice for audio applications.

Specifications and features

BU9253AS/FS
- Digital delay time: 131ms (fCLK = 375kHz)
- Built-in mixing circuit for adding original sound and echo sound
- Echo mix ratio settable by DC voltage
- Built-in amplifier circuit for structuring input/output secondary LPF
- Microphone mute function (mute of mixing sound of original sound + echo sound)
- Built-in CR oscillation circuit

BU9262AFS
- Digital delay time: 8-stage setting from 9.2ms to 192ms
- Built-in input/output mixing circuit
- Built-in feedback, delay volume circuit
- Built-in input/output LPF
- Serial interface
- Auto mute circuit built-in (action at power on, mode switching)
- Built-in auto reset circuit at power on

Application Scenarios

The BU9253FS-E2 is suitable for a wide range of audio applications including radio cassette recorders, mini-components, and karaoke systems.

Comparison

- Incorporates a digital delay circuit and an input/output mixing circuit in a single chip
- Offers various functions required for both Karaoke echo and surround systems
- Provides options for different delay times
- Built-in amplifier and LPF circuits improve audio quality
- Microphone mute function for controlling mixing sound
- Suitable for various audio applications

- Not suitable for applications requiring longer delay times