參數(shù)資料
型號: 73K302L
廠商: TDK Corporation
英文描述: Single-Chip Modem
中文描述: 單芯片調(diào)制解調(diào)器
文件頁數(shù): 20/29頁
文件大?。?/td> 282K
代理商: 73K302L
73K302L
Bell 212A, 103, 202
Single-Chip Modem
20
DYNAMIC CHARACTERISTICS AND TIMING
(continued)
PARAMETER
Special Tone Detectors
(continued)
CONDITION
MIN
NOM
MAX
UNIT
Hold Time
Answer tone
4
15
ms
900 Hz SCT tone
1
10
ms
202 Main Channel Mark
3
10
ms
202 Back Channel Mark
10
25
ms
1270 or 2225 Hz marks
5
15
ms
Hysteresis
2
dB
Detect Freq. Range
Output Smoothing Filter
Any Special Tone
-3
+3
%
10
k
pF
Output Load
TXA pin; FSK Single
Tone out for THD = -50 dB
in 0.3 to 3.4 kHz
50
Out of Band Energy
Frequency >12 kHz in all modes
See Transmit Energy Spectrum
-60
dBm0
Output Impedance
TXA pin
20
50
Clock Noise
TXA pin; 76.8 kHz or 122.88 kHz
in 202 main channel
0.1
0.4
mVrms
Carrier VCO
Capture Range
Originate or Answer
-10
+10
Hz
Capture Time
-10 Hz to +10 Hz Carrier
Frequency Change
40
100
ms
DPSK Recovered Clock
Capture Range
% of data rate
(center at 1200 Hz)
-625
+625
ppm
Data Delay Time
Analog data in at RXA pin to
receive data valid at RXD pin
30
50
ms
Tone Generator
Tone Accuracy
DTMF or FSK tones
-5
+5
Hz
Tone Level
For DTMF, must not be in 202 mode
-1
+1
dB
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