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PDF BU8731KV Data sheet ( Hoja de datos )
| Número de pieza | BU8731KV | |
| Descripción | PCM codec IC for digital cellular telephones | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Communication ICs
PCM codec IC for digital cellular
telephones
BU8731KV
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, µ / 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.
FApplications
Digital cellular telephones
FFeatures
1) )3V single power supply (VDD = 2.7V to 3.3V).
2) Built-in 14-bit precision linear, µ / 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:
S Built-in mic amplifier.
S Built-in receiver speaker amplifier (32Ω BTL type).
S Built-in earphone speaker amplifier (32Ω single
type).
S Built-in drive amplifier for reception REXT (600Ω).
S Built-in electronic volume control for gain adjust-
ment (for reception, transmission, and tone).
S Data signal I / O circuit allows for connection to ex-
ternal devices.
S For the REXT output and earphone output, soft-
mute function reduces pop noise when the power
is turned on and off.
7) DTMF signal and scale tone signal generator func-
tions are built into the tone signal generator block.
8) Internal switching transistor for ringer drive.
9) VQFP 48-pin package.
FAbsolute maximum ratings (Ta = 25_C)
610
1 page  
Communication ICs
BU8731KV
FElectrical characteristics (unless otherwise noted, Ta = 25_C, DVDD = RXVDD = TXVDD = 3.0V, FSYNC = 8kHz)
614
5 Page 
Communication ICs
FExternal dimensions (Units: mm)
BU8731KV
620
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet BU8731KV.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BU8731KV | PCM codec IC for digital cellular telephones | ROHM Semiconductor |
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