Description
The Karaoke/Surround Digital Echo IC
incorporates a digital delay circuit,
an input/output mixing circuit, supporting Karaoke
echo and surround system, all in a single chip.
BU9253AS/FS has functions required by Karaoke
echo system, and BU9262AFS has various functions
required for surround / echo system.
Features
＜BU9253AS/FS＞
1) Digital delay time : 131ms (f CLK = 375kHz)
2) Built-in mixing circuit for adding original sound and echo sound
3) Echo mix ratio settable by DC voltage
4) Built-in amplifier circuit for structuring input/output secondary LPF
5) Microphone mute function (mute of mixing sound of original sound + echo sound)
6) Built-in CR oscillation circuit
＜BU9262AFS＞
1) Digital delay time : 8-stage setting from 9.2ms to 192ms
2) Built-in input/output mixing circuit
3) Built-in feedback, delay volume circuit
4) Built-in input/output LPF
5) Serial interface
6) Auto mute circuit built in (action at power on, mode switching)
7) Built-in auto reset circuit at power on
Applications
Radio cassette recorder, mini-component and karaoke systems.
BU9253FS pin assignment
BU9253AS pin assignment
BU9253AS Block diagram, Application circuit
Application circuit
This mixes MIC IN, LCIN, RCIN, VOIN signals,
and selects the output path by selector.
Input mixer selector circuit
FROM: Company Name: Aunytor Electronic (HK) Co.,Ltd
Contact Person: liao
Skype: Aunytor
Email: 2885745253@qq.com