參數(shù)資料
型號: TWL1110TQFP
廠商: Texas Instruments, Inc.
英文描述: VOICE-BAND AUDIO PROCESSOR VBAPE
中文描述: 語音頻帶音頻處理器VBAPE
文件頁數(shù): 18/37頁
文件大?。?/td> 496K
代理商: TWL1110TQFP
TWL1110
VOICE-BAND AUDIO PROCESSOR (VBAP
)
SLWS103 – NOVEMBER 2000
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics (continued)
transmit timing requirements for 128-kHz CLK (see Figure 12)
PARAMETER
MIN
20
20
MAX
UNIT
tsu(PCMSYN)
th(PCMSYN)
tv(PCMO)
Setup time, PCMSYN high before rising edge of PCMCLK
Hold time, PCMSYN high after falling edge of PCMCLK
tc(PCMCLK)/4
tc(PCMCLK)/4
ns
Data valid time after the rising edge of PCMSYNC
50
ns
receive timing requirements for 128-kHz CLK (see Figure 11)
PARAMETER
MIN
MAX
UNIT
tsu(PCSYN)
th(PCSYN)
tsu(PCMI)
th(PCMI)
Setup time, PCMSYN high before rising edge of PCMCLK
20
tc(PCMCLK)/4
tc(PCMCLK)/4
ns
Hold time, PCMSYN high after falling edge of PCMCLK
20
ns
Setup time, PCMI high or low before falling edge of PCMCLK
20
ns
Hold time, PCMI high or low after falling edge of PCMCLK
20
ns
propagation delay times, C
Lmax
= 10 pF (see Figure 8)
PARAMETER
MIN
MAX
UNIT
tpd1
tpd2
tpd3
From PCMCLK bit 1 high to PCMO bit 1 valid
35
ns
From PCMCLK high to PCMO valid, bits 2 to n
35
ns
From PCMCLK bit n low to PCMO bit n Hi-Z
30
ns
I
2
C bus timing requirements (see Figure 10)
PARAMETER
MIN
MAX
UNIT
SCL
Clock frequency
400
kHz
t(HIGH)
t(LOW)
th(STA)
tsu(STA)
th(DAT)
tsu(DAT)
tsu(STO)
t(BUF)
tr
tf
Clock high time
600
ns
Clock low time
1300
ns
Hold time (repeated) START condition. After this period the first clock pulse is generated.
600
ns
Setup time for repeated START condition
600
ns
Data input hold time
0
ns
Data input setup time
100
ns
STOP condition setup time
600
ns
Bus free time
1300
ns
SDA and SCL rise time
300
ns
SDA and SCL fall time
300
ns
DTMF generator characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DTMF high to low tone relative amplitude (pre-emphasis)
1.5
2
2.5
dB
Tone frequency accuracy (for DTMF)
Resolution of 7.8125 Hz
–1.5
1.5
%
Harmonic distortion
Measured from lower tone group to
highest parasitic
–20
dB
MICBIAS characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
k
Load impedance (bias mode)
5
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