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| 型號： | AM79C32A |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Digital Subscriber Controller⑩ (DSC⑩) Circuit |
| 中文描述： | 數(shù)字用戶控制器⑩法（DSC⑩）電路 |
| 文件頁數(shù)： | 77/101頁 |
| 文件大?。?/td> | 1607K |
| 代理商： | AM79C32A |
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Am79C30A/32A Data Sheet
77
LIU Characteristics
All of the parameters below are measured at the chip terminals and are consistent with 2:1 transformers.
Parameter
Symbol
V
LOUT
Parameter Descriptions
Output mark amplitude measured between LOUT2 and LOUT1 (Note 1)
Receivable input level measured between LIN2 and LIN1, with noise added as
specified by CCITT I.430 section 8.6.2.1 (Note 2)
Output impedence measured between LOUT2 and LOUT1 spacing condition
Input impedence measured between LIN2 and LIN1
Timing extraction jitter on LOUT
Total phase deviation (LOUT with respect to LIN)
Pulse unbalanced measured between LOUT2 and LOUT1 (Note 1)
Output pulse width measured between LOUT2 and LOUT1 (Note 1)
Preliminary
Typ
2.210
2.326
Unit
Min
Max
2.442
V
V
LIN
530
1800
mV
Z
OUT
Z
IN
J
PD
PU
PW
20
20
–7
–7
–5
4.7
Kohm
Kohm
%
%
%
μs
+7
+15
+5
5.7
5.2
Notes:
1. See the equivalent test load circuit and pulse template in Figures 26 and 27.
2. The 530-mV receive input level is equivalent to 9.0 dB of attenuation from a nominal transmit level when measured at the
LIN pins. Allowing 0.5-dB loss in the isolation transformer, and 1.0-dB loss in the input isolation resistors, this level will
guarantee compliance to the CCITT receiver sensitivity spec of 7.5 dB when measured at the S reference point.
3. Typical receiver performance is 220 mV.
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