BU8761KV Datasheet, PDF (1/4 Pages) Rohm – CODEC IC for digital mobile phone

Communication ICs
BU8761KV
CODEC IC for digital mobile phone
BU8761KV
BU8761KV is a PCM CODEC IC developed for digital mobile phones. This IC incorporates many analog I/O functions
such as 14bit precision linear µ / A-LAW codec, two systems of microphone, amplifiers for receiver and earphone, and
data signal I/O circuit. Tone generator that can output maximum 3 chord is incorporated.
zApplications
Digital mobile phones
zExternal dimensions (Units mm)
z
1) +3V single power supply. (VDD=2.7 to 3.3V)
2) 14bit precision linear µ / A-LAW codec.
3) Transmission filter of the codec block is in conformity to the ITU-T
recommendation G.714.
4) Built-in PLL circuit for system clock generation.
5) Built-in DSP I/F which is in conformity with digital mobile phones.
6) Arbitary setting of the clock frequency of PCM data transmission is
allowed.
µ / A-LAW
64kHz to 2048kHz
Linear
28kHz to 2048kHz
7) Plenty of input / output analog functions :
• Two systems of built-in microphone amplifier. (differential input type,
single input type)
• Built-in speaker amplifier for receiver. (32ΩBTL type)
• Built-in speaker amplifier for earphone. (32Ω single type)
• Built-in speaker amplifier for REXT of call receiving system. (600Ω)
• Built-in electronic volumes for gain adjustment. (Call-receiving system,
call sending system, TONE system)
• Built-in input / output circuit for data signal which allows external
connection.
• Pop noise of REXT earphone and receiver outputs at the time of
switching on and off the power supply is reduced by means of soft
mute.
8) Tone generator building in that maximum 3 chord output is possible.
• DTMF signal, musical scale tone can be generate.
• Envelope on/ off the output wave shape can be set up in each part.
• SIN wave, rectangle wave can be chosen in the output wave shape.
9) VQFP48 pin package.
9.0±0.3
7.0±0.2
36 25
37
24
48
1
13
12
0.5 0.2±0.1
0.125±0.1
0.10
VQFP48
1/3