am79c30a Advanced Micro Devices, am79c30a Datasheet - Page 77

• Manufacturer Part Number: am79c30a
• Description: Digital Subscriber Controller ?dsc ?circuit
• Manufacturer: Advanced Micro Devices

LIU Characteristics
All of the parameters below are measured at the chip terminals and are consistent with 2:1 transformers.
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
3. Typical receiver performance is 220 mV.
Parameter
Symbol
V
Z
V
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.
PW
LOUT
Z
PD
PU
OUT
LIN
J
IN
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)
Am79C30A/32A Data Sheet
2.210
Min
530
4.7
20
20
–7
–5
–7
Preliminary
2.326
Typ
5.2
2.442
1800
Max
+15
5.7
+7
+5
Kohm
Kohm
Unit
mV
µs
%
V
%
%
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