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BU8761KV

P1-P3P4-P4
BU8761KV
Communication ICs
1/3
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 zExternal dimensions (Units：mm)
Digital mobile phones
zFeatures
1) +3V single power supply. (V
DD=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.
VQFP48
0.5
0.125
±
0.1
0.10
0.2
±
0.1
9.0
±
0.3
7.0
±
0.2
9.0
±
0.3
7.0
±
0.2
48
37
1
12
13
24
2536
0.5
1.425
±
0.1
0.10
BU8761KV
Communication ICs
2/3
zAbsolute maximum rating (Unless otherwise noted, Ta = 25°C)
Parameter Symbol Limits Unit
Digital power supply voltage
Analog power supply voltage
Digital pin apply voltage
Analog pin apply voltage
Input current
Power dissipation
Storage temperature range
Operation temperature range
DV
DD
RXV
DD
TXV
DD
V
TD
V
TA
I
IN
Pd
Tstg
Ta
−0.3 to +4.5
−0.3 to +4.5
−0.3 to +4.5
DV
SS
−0.3 to DV
DD
+0.3
RXV
SS
−0.3 to RXV
DD
+0.3
TXV
SS
−0.3 to TXV
DD
+0.3
−10 to +10
400
∗
−50 to +125
−30 to +85
V
V
V
V
V
V
mA
mW
°C
°C
∗
Drops by 4.0mW per 1
°C when used at more than Ta=25°C.
zRecommendable operation condition (Unless otherwise noted, Ta = 25°C)
Parameter Symbol UnitMax.Typ.Min.
DV
DD
RXV
DD
TXV
DD
2.7
2.7
2.7
−
−
−
3.3
3.3
3.3
V
V
V
Digital power supply voltege
Analog power supply voltege
Radiation resistance is not included design.
∗
zElectrical characteristics
(Unless otherwise noted, Ta = 25°C, DV
DD = RXVDD = TXVDD = 3.0V, FSYNC = 8kHz, DCLK = 256kHz,
Gain of each attenuator = 0dB)
Parameter
Conditions
Current consumption
∗1
Digital "H" level input voltage
Digital "L" level input voltage
Digital "H" level input current
Digital "L" level input current
Digital "H" level output voltage
Digital "L" level output voltage
Symbol
I
DD1
I
DD2
I
DD3
I
DD4
I
DD5
I
DD6
I
DD7
I
DD8
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
Min.
−
−
−
−
−
−
−
−
0.8DV
DD
−
−
−10
DV
DD
−
0.5
−
Typ.
8.0
7.0
6.0
5.4
5.1
3.7
3.3
0.1
−
−
−
−
−
−
Max.
11.5
10.2
8.6
7.8
7.3
5.3
4.8
20
−
0.2DV
DD
10
−
−
0.5
Unit
mA
µA
V
V
µA
µA
V
V
When all operating
Reference, Voice, SPC ON
Reference, Voice, EAR ON
Reference, Voice, RAMP ON
Reference, Voice, ON
Reference, Tone, ON
Only Reference ON
When all power down, FSYNC,
DCLK pin fixed
V
IH
=
DV
DD
V
IL
=
0V
I
OH
=
−1mA
I
OL
=
1mA
∗1
Supply voltage (DVDD, RXVDD, TXVDD) : 3V. No load for digital and analog output pin. Digital input pin except FSYNC. CLK pin
should be connected to DV
DD
or DVss.
Analog input pin should be connected to TXREF or RXREF with appropriate resistance.
Soft mute release voltage (SMUTE="0")
∗2
FSYNC=8kHz, DCLK=256kHz
∗2
∗2
∗2
∗2
∗2
∗2
∗2
BU8761KV
Communication ICs
3/3
zApplication circuit
+
−
+
−
36 35 34 33 32 31 30 29 28 27 26 25
121110987654321
37
38
39
40
41
42
43
44
45
46
47
48
13
14
15
16
17
18
19
20
21
22
23
24
CPU I / F PLL
for CPU
DSP
8kHz
SW8
SW12
SW0
1
2
3
MIC
Amp2
MIC
Amp
Amp1
Amp3
EAmp1
EAmp2
Amp5 Amp4
ERMT
SPMT
RAmp
JAmp
TEXT
R8
R7
C11
C10
C8
R5
MIC1O
MIC1IP
TXV
SS
TXREF
REFC
CODECREF
RXREF
SMUTE
SPEAKER
RXV
DD
RXV
SS
EARO
C7
EARPHONE(32Ω)
(32Ω)
1µ
1µ
1µ
2.2µ
0.22µ
MIC1IN
C9
R6
Frame Sync
Reset
XPRSTB
PCMOUT
PCMIN
DCLK
CPUSEL
TSTMOD
Fixed "L"
Fixed "L"
Fixed "L"
TSTIN
TSTOUT
NC
REXTDI
REXTDO
EXTO
RIN
AUDO
AUDVR
ERPN
ERPO
SPPN
SPPO
SPCOP
SPCON
SPOUT
DV
SS
DV
DD
SDA
SCL
STB
FSYNC
PLLLPF
TEXTDO
TEXTDI
TEXTA
DD
TXV
DD
TAUDO
MIC2O
MIC2IN
0.01µ
3-TONE
DTMF
GEN
DSP I / F
EXTSEL
SW9A
REXT
Power on by
REFPON
Power on by
VCPON
Power on by
TGPON
Power on by
VCPON or TGPON
Power on by
RXPON
Power on by
SPON
Power on by
EARON
R2
C2
R4
C4
C5 C6
C1
R1
C3
R3
SW4
5
6
7
SW9B
ERP0
SPP0
BPF
TONE
D / A
LPF
A / D AAF
D / A EV1
EV7
+
+
+
+
EV0
EV4
VREF /
COMMON
EV3
EV2
EV6
EV5
+
−
+
−
+
−
SOFTMUTE
+
+
+
+
+
−
+
−
Amp7
15
SW14
+
−
+
−
+
−
+ ++
+++++
+
+
P1-P3P4-P4

BU8761KV

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Description:
IC PCM CODEC DUAL MIC VQFP48
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