BU8776KN Datasheet, PDF (2/2 Pages) LSI Computer Systems – PCM CODEC for Digital cellular phones

Application Circuit
CPU
Frame
Synchronizing
signal
8KHz
36
35
34
33
32
RESET
37
XPRSTB
38
DVDD
39
DVSS
40
PCMOUT
To DSP
41
PCMIN
42
DCLK
"L" fixed
43
CPUSEL
"L" fixed
44
TSTMOD
"L" fixed
45
TSTIN
46
TSTOUT
47
NC
48
SPOUT
CPU I/F
3-TONE
DTMF
GEN
TONE
D/A
DSP I/F
BPF
LPF
SW9A
SW9B
PLL
A/D
D/A
ON by REFPON
1
2
3
4
5
ON by VCPON
ON by TGPON
REXT
ON by VOPON
or TGPON
ON by RXPON
ON by SPON
ON by EARON
TEXT
C11
R8
C1
R7
31
30
29
28
27
26
25
SW8
SW12
Amp1
AAF
SW0
1
2
3
EV0
MIC
Amp2
MIC
Amp
EV3
EV1
VREF/
COMMON
EV4
ERMT
SOFTMUTE
JAmp
SPMT
EAmp1
Amp5
Amp4
EAmp2
MIC1O
24
R6
MIC1IN
C9 _C8
23
R5
MIC1IP
22
TXVSS
21
TXREF
20
1µ
REFC
19
2.2µ
CODECREF
18
1µ
RXREF
17
1µ
SMUTE
16
0.22µ
RXVDD
15
EARO
14
RXVSS ^C7
13
Speaker for earphone
Dynamic type 32
6
7
8
9
10
11
12
R2
R1 C2
C1
R4
R3 C4
C3
C5 C6
Speaker for receiver
Dynamic type 32
Typical external
circuit constant
R1 100k
R2 100k
R3 100k
R4 100k
R5 5.6k
R6 100k
R7 5.6k
R8 100k
C1 0.1µ
C2 470p
C3 0.1µ
C4 470p
C5 0.1µ
C6 0.1µ
C7 0.1µ
C8 2.2µ
C9 470p
C10 2.2µ
C11 470p
Comparision table
Part No.
BU8776KN
BU8730KV
BU8732AKV
BU8731KV
BU8733KV
Function
PCM CODEC
PCM CODEC
PCM CODEC
PCM CODEC
PCM CODEC
Supply voltage range
Operating mode
consumption current (TYP.)
Stand-by mode
consumption current (TYP.)
Filter structure
2.7~3.3V
8.0mA
0.1µA
· Digital
2.7~3.3V
8.2mA
0.1µA
· Digital
2.7~3.3V
8.0mA
0.1µA
· Digital
2.7~3.3V
8mA
0.1µA
· Digital
2.7~3.3V
5.4mA
0.1µA
· Digital
Dynamic receiver driving
Speaker output form
BTL
BTL
BTL
BTL
BTL
Speaker output load
32
20k
32
32
32
Amplifier for earphone
Tone generation
DTMF
DTMF · Triple tone
DTMF
DTMF
DTMF
Tone pattern
16Hz warble
Each for GSM
16Hz warble
16Hz warble
16Hz continuation
Gain control
Mute function
Soft mute function Soft mute function Soft mute function Soft mute function Soft mute function
Power down function Power down in each block Power down in each block Power down in each block Power down in each block Power down in each block
DAI(Digital Audio Interface)
Side tone
Inside(Gain control) Outside(No gain control) Inside(Gain control
Inside(Gain control
Inside(Gain control
Auxiliary analog input
Single end x2
Single end
Single end x2
Single end x2
Single end
Auxiliary analog output Single end x2
Single end
Single end x2
Single end x2
Single end
Ringer direct driving
Gain control
Gain control
Gain control
PCM format
µ/A-LAW Linear
Linear
µ/A-LAW Linear
µ/A-LAW·Linear
µ/A-LAW·Linear
Package
QFN48U
VQFP48
VQFP48
VQFP48
VQFP48