BU8761KV
Communication ICs
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.
Applications
Digital mobile phones
External dimensions
(Units：mm)
9.0
±
0.3
7.0
±
0.2
Features
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.
36
9.0
±
0.3
7.0
±
0.2
25
24
13
0.5
37
48
1
12
1.425
±
0.1
0.10
0.125
±
0.1
0.5
0.2
±
0.1
0.10
VQFP48
1/3
BU8761KV
Communication ICs
Absolute maximum rating
(Unless otherwise noted, Ta = 25°C)
Parameter
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
Symbol
DV
DD
RXV
DD
TXV
DD
V
TD
V
TA
I
IN
Pd
Tstg
Ta
Limits
−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
Unit
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.
Recommendable operation condition
(Unless otherwise noted, Ta = 25°C)
Parameter
Digital power supply voltege
Analog power supply voltege
Symbol
DV
DD
RXV
DD
TXV
DD
∗
Radiation resistance is not included design.
Min.
2.7
2.7
2.7
Typ.
−
−
−
Max.
3.3
3.3
3.3
Unit
V
V
V
Electrical characteristics
(Unless otherwise noted, Ta = 25°C, DV
DD
= RXV
DD
= TXV
DD
= 3.0V, FSYNC = 8kHz, DCLK = 256kHz,
Gain of each attenuator = 0dB)
Parameter
Symbol
I
DD1
I
DD2
I
DD3
Current
consumption
∗1
I
DD4
I
DD5
I
DD6
I
DD7
I
DD8
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
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
µA
V
V
µA
µA
V
V
V
IH
=
DV
DD
V
IL
=
0V
I
OH
=−1mA
I
OL
=
1mA
mA
Unit
Conditions
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
∗2
∗2
∗2
∗2
∗2
∗2
∗2
∗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
2/3
BU8761KV
Communication ICs
Application circuit
TEXT
C11
for CPU
0.01µ
TEXTA
DD
TEXTDO
R7
TAUDO
PLLLPF
TEXTDI
FSYNC
36
35
34
33
32
31
30
29
28
27
26
MIC2IN
MIC2O
TXV
DD
SDA
STB
SCL
25
SW8
MIC1O
Reset
+
37
XPRSTB
38
DV
DD
39
DV
SS
40
PCMOUT
SW12
−
CPU I / F
PLL
+
Frame Sync
8kHz
R8
C10
24
MIC1IN
23
+
+
R6
C9
C8
R5
+
+
+
+
+
+
3-TONE
DTMF
GEN
SW0
Amp1
+
−
1
2
3
TONE
D/A
EV3
MIC
Amp2
MIC1IP
22
TXV
SS
21
TXREF
−
MIC
Amp
VREF /
COMMON
SOFTMUTE
EAmp1
EAmp2
10
11
SPCON
SPCOP
DSP
41
PCMIN
42
DCLK
DSP I / F
BPF
A/D
AAF
EV7
EV0
LPF
D/A
EV1
Fixed "L"
43
CPUSEL
EV4
Fixed "L"
44
SW14
SW4
15
7
6
5
ERP0
SPP0
TSTMOD
Fixed "L"
45
JAmp
EXTSEL
TSTIN
Amp7
EV6
TSTOUT
47
NC
48
SPOUT
REXTDI
Amp3
+
RAmp
EV5
14
Amp5
EV2
SW9A
SW9B
Amp4
−
+
+
RXV
SS
13
−
REXTDO
EXTO
RIN
AUDO
AUDVR
ERPN
ERPO
SPPN
1
2
3
+
4
+
5
+
6
7
8
9
SPPO
12
R2
R4
C5
C6
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
R1
C1
C2
R3
C3
C4
SPEAKER
(32Ω)
+
+
−
46
+
−
+
−
ERMT
SPMT
+
+
+
+
20
REFC
19
1µ
2.2µ
CODECREF
18
RXREF
17
SMUTE
16
RXV
DD
0.22µ
15
EARO
1µ
1µ
−
−
+
+
EARPHONE(32Ω)
C7
+
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