BU9255FS-E2 Rohm Semiconductor, BU9255FS-E2 Datasheet

IC KARAOKE ECHO SGL CHIP SSOPA16

BU9255FS-E2

Manufacturer Part Number
BU9255FS-E2
Description
IC KARAOKE ECHO SGL CHIP SSOPA16
Manufacturer
Rohm Semiconductor
Type
Echo ICr
Datasheet

Specifications of BU9255FS-E2

Applications
Karaoke
Mounting Type
Surface Mount
Package / Case
16-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
KARAOKE functions for portable stereo sets, mini com-
ponent stereo sets, video CDs and DVDs, etc.
1) Echo mixing ratio is adjustable with a DC voltage.
2) A second order LPF can be configured with the
Applications
Features
Block diagram
KARAOKE echo IC
BU9253AS / BU9253FS / BU9255FS
Multimedia ICs
BU9253FS / BU9255FS
BU9253AS
internal amplifier and an attached capacitor and
resistor.
OSC
18
1
COUNTER
OSC
16
1
COUNTER
17
2
15
2
16
3
V
CC
14
3
V
CC
15
4
13
4
SRAM
A / D
D / A
14
5
SRAM
A / D
D / A
3) Delay time of 131ms. (when f
4) Internal mute function.
5) Single power supply (5V).
12
5
13
6
11
6
12
7
10
7
11
8
MIX
9
8
CLK
MIX
10
9
= 357kHz)
1

Related parts for BU9255FS-E2

BU9255FS-E2 Summary of contents

Page 1

... 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 and converter, SRAM, LPF, and mixer for mixing source signals. With these ICs, an echo function can be configured easily and with minimum external components. ...

Page 2

... BU9253FS Power dissipation BU9253AS BU9255FS Operating temperature Storage temperature Input voltage 1 Reduced by 5.0mW for each increase over Reduced by 6.0mW for each increase over 25 C. • Recommended operating conditions (Ta = 25°C) Parameter Symbol Power supply voltage BU9253AS / BU9253FS / BU9255FS BU9253AS Function Pin No ...

Page 3

... Multimedia ICs • Electrical characteristics (Ta = 25°C, V distortion = 400Hz ~ 30kHz filter, output noise voltage : DIN-AUDIO) *Pin No. are for BU9253FS , BU9255FS and BU9253AS Parameter Symbol Current consumption I CC Voltage gain 1 G Voltage gain 2 G Output distortion 1 THD1 Output distortion 2 THD2 V Output noise voltage 1 ...

Page 4

... Multimedia ICs • Measurement circuit (for BU9253FS / BU9255FS) 100 0.1 100p 39k 16 15 OSC COUNTER BU9253AS / BU9253FS / BU9255FS SRAM – 4.7k 0.01 0.47 10k 0.01 Fig. 1 0.012 10k 20k 2.2 1k 8.2k 4700p 2 – + MIX 7 8 3300p 2.2 15k Unit RESISTOR : [ ] ...

Page 5

... Note: Figures in parentheses ( ) are for BU9253AS. (2) Differences between BU9253AS / FS and BU9255FS There is a difference regarding the signal stopping for muting. With BU9253AS / FS, the output from pin 8 (pin 9) is stopped during muting. With BU9255FS, the output from pin 5 is stopped during muting. BU9253AS / BU9253FS / BU9255FS V ...

Page 6

... A). Assuming a feed- back ratio (A) of 0.7 and a maximum V V must be less than 1 P-P • External dimensions (Units: mm) BU9253FS / BU9255FS 6.6 0 0.8 0.36 0.1 SSOP-A16 6 BU9253AS / BU9253FS / BU9255FS OdB + AD SRAM Recommendable gain – 6dB (A < 1) With Pin NO. BU9253FS Fig this O ∞ · ...

Page 7

Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...

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