BU9262AFS

TECHNICAL NOTE Audio Accessory ICs Karaoke/Surround Digital Echo BU9253AS/FS, BU9262AFS ●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 (fCLK = 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. ●Product lineup Parameter Supply voltage Oscillation frequency Current consumption Operating temperature range Package Digital delay Echo level BU9253AS 4.0V～5.5V 375kHz 6mA -10～+70℃ SDIP18 Fixed Fixed BU9253FS 4.0V～5.5V 375kHz 6mA -10～+70℃ SSOP-A16 Fixed Fixed BU9262AFS 4.5V～5.5V 2MHz 20mA -10～+70℃ SSOP-A32 Variable Variable ...