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Package Cooled:QFP-48  D/C:01+  

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Part Number: BU8731KV

 

 

Package Cooled: QFP-48

D/C: 01+

Description: The BU8731KV is a PCM codec IC developed for use with digital cellular telephones. It contains analog input / output fe...


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BU8731KV General Description


The BU8731KV is a PCM codec IC developed for use with digital cellular telephones. It contains analog input / output features such as a 14-bit linear precision, / A-LAW codec, mic and speaker amplifiers, and switching transistor for the ringer drive. This all makes the BU8731KV perfect for PDC and CDMA-type cellular telephones.

BU8731KV Maximum Ratings

Parameter Symbol Limits Unit
Digital power supply voltage DVDD -0.3~+4.5 V
Analog power supply voltage RXVDD -0.3~+4.5 V
TXVDD -0.3~+4.5 V
Digital input voltage VDIN DVSS-0.3~DVDD+0.3 V
Analog input voltage VAIN RXVSS-0.3~RXVDD+0.3 V
TXVSS-0.3~TXVDD+0.3 V
Input current IIN -10~+10 mA
Power dissipation Pd 400*1 mW
Operating temperature Tstg -50~+125  
Storage temperature Topr -20~+85  

*1 Reduced by 4.0mW for each increase in Ta of 1 over 25

BU8731KV Features

1) 3V single power supply (VDD = 2.7V to 3.3V).
2) Built-in 14-bit precision linear, / A-LAW codec.
3) Transmission filter for the codec unit conforms to ITU-T recommendations.
4) Built-in PLL circuit for system clock generation.
5) Clock frequency for PCM data transmission can be set anywhere between 64kHz (128kHz when linear) to 2048kHz.
6) Analog input / output functions:
Built-in mic amplifier.
Built-in receiver speaker amplifier (32 BTL type).
Built-in earphone speaker amplifier (32 single type).
 Built-in drive amplifier for reception REXT (600).
Built-in electronic volume control for gain adjustment (for reception, transmission, and tone).
Data signal I / O circuit allows for connection to external devices.
For the REXT output and earphone output, softmute function reduces pop noise when the power is turned on and off.
7) DTMF signal and scale tone signal generator functions are built into the tone signal generator block.
8) Internal switching transistor for ringer drive.
9) VQFP 48-pin package.

BU8731KV Typical Application

Digital cellular telephones

BU8731KV datasheet

BU8731KV
PDF/DataSheet Download

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