AK2306 Datasheet, PDF (29/38 Pages) Asahi Kasei Microsystems – Dual PCM CODEC for ISDN/VoIP TERMINAL ADAPTER

ASAHI KASEI
[AK2306/LV]
PCM INTERFACE ( Long Frame, Short Frame, GCI )
Unless otherwise noted, the specification applies for TA = -40 to +85^oC, VDD = 5V±5%/3V±0.3V,VSS = 0V and
FS0= 8kHz. All timing parameters are measured at VOH = 0.8VDD and VOL =0.4V.
Parameter
Symbol Min
FS Frequency
1/t_PF
-
BCLK Frequency
1/t_PB 128
BCLK Pulse Width High
t_WBH
80
BCLK Pulse Width Low
t_WBL
80
Rising Time: (BCLK,FS0,FS1,DX0,DX1,DR0,DR1)
t_R
Falling Time: (BCLK,FS0,FS1,DX0,DX1,DR0,DR1)
t_F
Hold Time: BCLK Low to FS High
t_HBF
40
Setup Time: FS High to BCLK Low
t_SFB
70
Setup Time: DR to BCLK Low
t_SDB
40
Hold Time: BCLK Low to DR
t_HBD
40
Delay Time: BCLK High to DX valid
Note1)
t_DBD
Long Frame
Hold Time: 2^nd period of BCLK Low to FS Low
t_HBFL
40
Delay Time: FS or BCLK High, whichever is later,to DX valid
Note1)
t_DZFL
Delay Time: BCLK Low to DX High-Z
Note1)
t_DZCL
10
FS Pulse Width Low
t_WFSL
1
Short Frame
Hold Time: BCLK Low to FS Low
Setup Time: FS Low to BCLK Low
Delay Time: BCLK Low to DX High-Z
Note1)
GCI
t_HBFS
40
t_SFBS
40
t_DZCS
10
BCLK Frequency
1/t_PBG 512
Delay Time: Second BCLK Low to DX High-Z
t_DZCG 10
Setup Time: DR to Second BCLK High
t_SDBG 40
Hold Time: Second BCLK High to DR
t_HBDG 40
Note1) Measured with 150pF Load capacitance and driving two LSTTLs
Typ Max Units Ref Fig
8
- kHz
4096 kHz
ns
ns
40 ns
Fig1
40 ns Fig2
Fig3
ns
ns
ns
ns
60 ns
ns
60 ns
Fig1
60 ns
BCL
K
ns
ns Fig2
60 ns
4096 kHz
60 ns
Fig3
ns
ns
MS0093-E-04
29
2001/11