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01W127A
PCM CODEC for Digital cellular phones
BU8776KN
Description BU8776KN is PCM CODEC deveolped for digital cellular phones. High-precision linear CODEC and each audio part are integrated into a single chip by mixed signal technology. Compact and thin QFN48U package is adopted. Dimension (Units : mm)
1.4 0.1 0.6 +0.1 -0.3
37
7.2 0.1 7.0 0.1
36 25 24
8
0.1
7.2 0.1 7.0 0.1
48 1 12
0.2 0.05
Features 1) +3V single power supply (VDD=2.7~3.3V) 2) 14bit high-precision linear /A-LAW CODEC 3) Transmission filter in CODEC (Based on ITU-T G.714) 4) Built-in PLL circuit for generating system clock 5) Built-in DSP I/F for PDC, N-CDMA 6) Serial I/F for register setting adapted for 3-wire serial type 7) Selectable PCM data transmission clock frequency /A-LAW 64kHz~2048kHz Linear 128kHz~2048kHz 8) Wide variety of Analog I/O functions *Built-in two microphone amplifiers (Differential input type, single input type) *Built-in speaker amplifier for receiver (32 BTL type) *Built-in speaker amplifier for earphone (32 single type) *Built-in driver amplifier for receiving REXT (600 ) *Built-in electronic volume for gain control (Receiving, Transmitting, TONE) *Built-in deta signal I/O circuit can connect outside *REXT, earphone, and receiver output reduce the pop noise by soft mute when power is ON/OFF. 9) QFN48U small, thin package
0.4 0.18 0.05 0.05 M
12
12
0.05
QFN48U
Applications PDC/CDMA/GSM type digital cellular phones
November, 2001
0.01+0.03 -0.007 0.6 0.1 0.8 +0.2 -0.1
0.1
5 0. 5.1 0 .4 +0
4 0. 35.1 0 .3 +0
13
Application Circuit
CPUO Frame Synchronizing signal 8KHz
TEXTADD TEXTDO PLLLPF TEXTDI TAUDO FSYNC TXVDD MIC2O
TEXT
C11 R8
MIC2IN
*{
C1
*{
R7 25 MIC1O 24
SDA
SCL
36
35
STB
34
33
32
31
30
29
28
27
26
SW8 RESET 37 XPRSTB 38 DVDD 39 DVSS 40 PCMOUT To DSP 41 PCMIN 42 DCLK "L" fixed 43 CPUSEL 44 TSTMOD 45 TSTIN
{* |*
SW12 CPU I/F PLL
*| *{
R6 MIC1IN 23 MIC1IP 22
*| *{
*{
C9 C8
*{
3-TONE DTMF GEN TONE D/A
Amp1
SW0
*{ *|
MIC Amp2
R5
1 2 3 EV3 MIC Amp
TXVSS 21 TXREF 20 REFC 19
DSP I/F
BPF
A/D
AAF
EV7
EV0
*{
1
*{
Typical external circuit constant R1: 100k R2: 100k R3: 100k R4: 100k R5: 5.6k R6: 100k R7: 5.6k R8: 100k C1: 0.1 C2: 470p C3: 0.1 C4: 470p C5: 0.1 C6: 0.1 C7: 0.1 C8: 2.2 C9: 470p C10: 2.2 C11: 470p
{*
LPF
D/A
EV1
VREF/ COMMON
{*
EV4 SOFTMUTE
ERPO SPPO 15 SW14 7 6 5 SW4
2.2 CODECREF *{ 18 RXREF 17 SMUTE 16 RXVDD 15 EARO 14 RXVSS 13 1
*{
{*
"L" fixed
ERMT
*| *{
1
*{
"L" fixed
Amp7
Amp3
EV6
EV5
RAmp
47 NC
*{
48 SPOUT
REXTDI
SW9A SW9B
RIN AUDO AUDVR REXTDO
EV2
ERPN
SPPN
ERPO
SPPO
1
2
3
4
5
6
7
8
9
10
11
SPCON
SPCOP
EXTO
ON by REFPON ON by VCPON
*{
*{
ON by TGPON ON by VOPON or TGPON ON by RXPON
REXT
ON by SPON
ON by EARON
*oe Comparision table
Part No.
Function Supply voltage range
Operating mode consumption current (TYP.) Stand-by mode consumption current (TYP.)
BU8776KN
PCM CODEC 2.7~3.3V 8.0mA 0.1A * Digital
BU8730KV
PCM CODEC 2.7~3.3V 8.2mA 0.1A * Digital
Filter structure
Dynamic receiver driving
Speaker output form Speaker output load Amplifier for earphone Tone generation Tone pattern Gain control Mute function Power down function DAI(Digital Audio Interface) Side tone Auxiliary analog input Auxiliary analog output Ringer direct driving PCM format Package /A-LAWLinear QFN48U Linear VQFP48 Inside(Gain control) Single end x2 Single end x2 Outside(No gain control) Inside(Gain control*j Single end Single end Single end x2 Single end x2 Gain control /A-LAWLinear VQFP48 Inside(Gain control*j Single end x2 Single end x2 Gain control /A-LAW*Linear VQFP48 Inside(Gain control*j Single end Single end Gain control /A-LAW*Linear VQFP48 Soft mute function Soft mute function Soft mute function Soft mute function Soft mute function DTMF 16Hz warble DTMF * Triple tone Each for GSM DTMF 16Hz warble DTMF 16Hz warble DTMF 16Hz continuation BTL 32 BTL 20k BTL 32 BTL 32 BTL 32
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
{* |* {*
*{
46 TSTOUT
EXTSEL
JAmp SPMT
*| *{
0.22
EAmp1
*{
Speaker for earphone Dynamic type 32
Amp5
*| *{
Amp4
{* |*
*| *{
C7
EAmp2 12
R2 R1 C1 C2 R3 C3
R4 C4
C5
C6 Speaker for receiver Dynamic type 32
BU8732AKV
PCM CODEC 2.7~3.3V 8.0mA 0.1A * Digital
BU8731KV
PCM CODEC 2.7~3.3V 8mA 0.1A * Digital
BU8733KV
PCM CODEC 2.7~3.3V 5.4mA 0.1A * Digital

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