
ASAHI KASEI 
[AK4342] 
MS0506-E-02 
2006/07 
- 11 - 
SWITCHING CHARACTERISTICS 
(Ta=25
°
C; AVDD, DVDD, HVDD, PVDD=2.7 
~
 3.6V; TVDD=1.6 
~
 3.6V) 
Parameter 
Master Clock Timing (2.7V 
≤
 TVDD 
≤
 3.6V) 
Half Speed Mode       (512/768fs) 
Normal Speed Mode  (256/384/512/768fs) 
Double Speed Mode  (128/192/256/384fs)
Pulse Width Low  
Pulse Width High 
Master Clock Timing (1.6V 
≤
 TVDD < 2.7V)
Half Speed Mode       (512/768fs) 
Normal Speed Mode  (256/384fs) 
Double Speed Mode  (128/192fs)
Pulse Width Low  
Pulse Width High 
LRCK Timing
Frequency 
Half Speed Mode       (DFS1-0 bits = “10”) 
Normal Speed Mode  (DFS1-0 bits = “00”) 
Double Speed Mode  (DFS1-0 bits = “01”) 
Duty Cycle 
Serial Interface Timing 
(Note 25) 
BICK Period
Half Speed Mode 
Normal Speed Mode 
Double Speed Mode 
BICK Pulse Width Low 
Pulse Width High 
LRCK Edge to BICK “
↑
” 
(Note 26) 
BICK “
↑
” to LRCK Edge 
(Note 26) 
LRCK Edge to BICK “
↓
” 
(Note 27) 
BICK “
↓
” to LRCK Edge 
(Note 27) 
SDATA Hold Time 
SDATA Setup Time 
Control Interface Timing (3-wire Serial mode)
CCLK Period
CCLK Pulse Width Low 
Pulse Width High 
CDTI Setup Time 
CDTI Hold Time 
CSN “H” Time 
CSN “
↓
” to CCLK “
↑
” 
CCLK “
↑
” to CSN “
↑
” 
Power-down & Reset Timing 
PDN Pulse Width  
Note 25. Refer to “Serial Data Interface”. 
Note 26. When BCKP bit is set to “0”, BICK rising edge must not occur at the same time as LRCK edge.  
Note 27. When BCKP bit is set to “1”, BICK falling edge must not occur at the same time as LRCK edge. 
Note 28. The AK4342 can be reset by bringing PDN pin = “L” to “H” only upon power up. 
Symbol 
fCLK 
fCLK 
fCLK 
tCLKL 
tCLKH 
fCLK 
fCLK 
fCLK 
tCLKL 
tCLKH 
fsh 
fsn 
fsd 
Duty 
tBCK 
tBCK 
tBCK 
tBCKL 
tBCKH 
tLRB 
tBLR 
tLRB 
tBLR 
tSDH 
tSDS 
tCCK 
tCCKL 
tCCKH 
tCDS 
tCDH 
tCSW 
tCSS 
tCSH 
tPD 
min 
4.096 
2.048 
6.144 
0.4/fCLK 
0.4/fCLK 
4.096 
2.048 
6.144 
0.4/fCLK 
0.4/fCLK 
8 
8 
60 
45 
1/128fsh 
1/128fsn 
1/64fsd 
70 
70 
40 
40 
40 
40 
40 
40 
200 
80 
80 
40 
40 
150 
50 
50 
150 
typ 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
max 
18.432 
36.864 
36.864 
- 
- 
18.432 
18.432 
18.432 
- 
- 
24 
48 
96 
55 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
- 
Units
MHz
MHz
MHz
ns 
ns 
MHz
MHz
MHz
ns 
ns 
kHz 
kHz 
kHz 
%
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
ns 
(Note 28)