BU9253 Ver la hoja de datos (PDF) - ROHM Semiconductor
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componentes Descripción
Fabricante
BU9253 Datasheet PDF : 6 Pages
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Multimedia ICs
KARAOKE echo IC
BU9253AS / BU9253FS / BU9255FS
The BU9253AS, BU9253FS and BU9255FS are single-chip ICs that contain all the components needed to configure
a KARAOKE echo system: an A / D and D / A converter, SRAM, LPF, and mixer for mixing source signals. With
these ICs, an echo function can be configured easily and with minimum external components.
•Applications
KARAOKE functions for portable stereo sets, mini com-
ponent stereo sets, video CDs and DVDs, etc.
•Features
1) Echo mixing ratio is adjustable with a DC voltage.
2) A second order LPF can be configured with the
internal amplifier and an attached capacitor and
resistor.
3) Delay time of 131ms. (when fCLK = 357kHz)
4) Internal mute function.
5) Single power supply (5V).
•Block diagram
BU9253FS / BU9255FS
16
15
14
13
12
11
10
9
OSC
VCC
A/D
BU9253AS
COUNTER
SRAM
MIX
D/A
1
2
3
4
5
6
7
8
18
17
16
15
14
13
12
11
10
OSC
VCC
A/D
COUNTER
SRAM
MIX
D/A
1
2
3
4
5
6
7
8
9
1
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