DS2186SN Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS2186SN

Transmit Line Interface

Dallas Semiconductor -> Maxim Integrated 

DS2186

CHARACTERISTICS OF T1 AND CEPT INTERFACES Table 3

CHARACTERISTIC

T1

CEPT

LINE RATE

LINE CODE

1.544 MHz

AMI1 or B8ZS

2.048 MHz

AMI or HDB3

TEST LOAD IMPEDANCE

100 ohm Resistive

120 ohm Resistive (wire pair)

75 ohm Resistive (coax)

NOMINAL PEAK

VOLTAGE

2.4V to 3.6 V2

3.0V (wire pair)

2.37V (coax)

PULSE SHAPE

–Scaled to fit templates shown–

NOMINAL PULSE WIDTH

324 ns

244 ns

PULSE IMBALANCE

< 0.5 dB difference between

total power of positive and

negative pulses.

1) Negative peak = positive peak ±5%

2) Positive width at nominal half ampli-

tude = negative width at nominal half

amplitude ±5%.

NOTES:

1. With a ones density of at least 12.5% and no more than 15 consecutive zeros.

2. Measured at the cross–connect (DSX–1) point; CSU applications may be 7.5 to 15 dB below these levels.

022798 7/11

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