AM79C30AVC datasheet(77/101 Pages) AMD

77 / 101 page

Am79C30A/32A Data Sheet

LIU Characteristics

All of the parameters below are measured at the chip terminals and are consistent with 2:1 transformers.

Parameter

Symbol

Parameter Descriptions

Preliminary

Unit

Min

Typ

Max

VLOUT

Output mark amplitude measured between LOUT2 and LOUT1 (Note 1)

2.210

2.326

2.442

VLIN

Receivable input level measured between LIN2 and LIN1, with noise added as

specified by CCITT I.430 section 8.6.2.1 (Note 2)

530

1800

ZOUT

Output impedence measured between LOUT2 and LOUT1 spacing condition

Kohm

ZIN

Input impedence measured between LIN2 and LIN1

Kohm

Timing extraction jitter on LOUT

–7

Total phase deviation (LOUT with respect to LIN)

–7

+15

Pulse unbalanced measured between LOUT2 and LOUT1 (Note 1)

–5

Output pulse width measured between LOUT2 and LOUT1 (Note 1)

4.7

5.2

5.7

µs

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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