BU8732AKV Datasheet, PDF (10/11 Pages) Rohm – CODEC IC for digital mobile phone

Communication ICs
BU8732AKV
zDigital AC characteristics
(Ta=25°C, DVDD=RXVD =TXVDD=3.0V, FSYNC=8kHz, DCLK=256 kHz_, unless specified particularly Gain= 0db)
< Serial interface timing >
Parameter
Symbol Min. Typ. Max. Unit
Conditions
Data clock frequency
(DCLK)
64
−
2048
µ / A-LAW
fCLK
kHz
128
−
2048
Linear
Frame Sync Frequency
(FSYNC)
fSYNC
7.996 8.000 8.004 kHz FSYNC frequency
Input transition time 0 → 1
TIR
−
−
20
ns Signal rise time
Input transition time 1 → 0
TIF
−
−
20
ns Signal fall time
PCMIN Set up time
TRS
100
−
−
ns DCLK↓ −PCMIN
PCMIN Hold time
TRH
100
−
−
ns DCLK↓ −PCMIN
TSR
100
−
−
DCLK↓ −FSYNC↑
Other timings
TSS
100
−
−
ns DCLK↓ −PCMOUT
TSH
100
−
−
DCLK↓ −PCMOUT
< Write timing for the internal registers >
Parameter
SCL frequency
SDA input set up time
SDA input hold time
Input hold time
Input setup time
STB input hold time
Symbol
fSCL
tSU : DATA
tHD : DATA
tsud
thtd
tpwd
Min.
−
100
100
333
1000
667
Typ.
−
−
−
−
−
−
Max.
3
−
−
−
−
−
Unit
MHz
ns
ns
ns
ns
ns
Conditions
SCL clock frequency
SDA↓ −SCL↓
SDA↓ −SCL↑
SCL↑ −STB↑
SCL↑ −STB↓
STB↑ −STB↓
zExternal dimensions (Unit : mm)
9.0±0.3
7.0±0.2
36 25
37
24
48
1
13
12
0.5 0.2±0.1
0.125±0.1
0.10
VQFP48
10/10