BU8761KV Datasheet, PDF (3/4 Pages) Rohm – CODEC IC for digital mobile phone

Communication ICs
BU8761KV
zApplication circuit
Reset
37
XPRSTB
38
DVDD
39
DVSS
40
PCMOUT
DSP
41
PCMIN
42
DCLK
Fixed "L"
43
CPUSEL
Fixed "L"
44
TSTMOD
Fixed "L"
45
TSTIN
46
TSTOUT
47
NC
48
SPOUT
Power on by
REFPON
Power on by
VCPON
Power on by
TGPON
Power on by
VCPON or TGPON
Power on by
RXPON
for CPU
Frame Sync
8kHz
TEXT
C11
R8
C10
R7
36
35
34
33
32
31
30
29
28
27
26
25
CPU I / F
3-TONE
DTMF
GEN
DSP I / F
TONE
D/A
BPF
LPF
SW9A
SW9B
PLL
A/D
SW8
SW12
Amp1
AAF
SW0
MIC
Amp2
1
2
3
EV3
EV0
MIC
Amp
+
D/A
EV1
VREF /
COMMON
+
EV4
Amp3
ERMT ^−
+
JAmp
SOFTMUTE
+
SPMT
−
+
EAmp1
Amp5
Amp4
−
−
+
EAmp2
MIC1O
24 _R6
MIC1IN
23
MIC1IP
C9
C8
R5
22
TXVSS
21
TXREF
20
1µ
REFC
19
2.2µ
CODECREF
18
1µ
RXREF
17
1µ
SMUTE
16
RXVDD
0.22µ
15
EARO
14
RXVSS
13
EARPHONE(32Ω)
C7
1
2
REXT
3
4
5
6
7
8
9
10
11
12
+
+
+
R2
R1
C2
C1
R4
R3
C4
C3
C5
C6
SPEAKER
(32Ω)
Power on by
SPON
Power on by
EARON
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