Owner's manual

DS21455/DS21458 Quad T1/E1/J1 Transceivers

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25.9 Component Specifications

Table 25-6. TRANSFORMER SPECIFICATIONS

SPECIFICATION RECOMMENDED VALUE

Turns Ratio (3.3V Applications) 1:1 (receive) and 1:2 (transmit) ±2%

Primary Inductance

600mH minimum

Leakage Inductance

1.0mH maximum

Intertwining Capacitance 40pF maximum

Transmit Transformer DC Resistance

Primary (Device Side)

Secondary

1.0Ω maximum

2.0Ω maximum

Receive Transformer DC Resistance

Primary (Device Side)

Secondary

1.2Ω maximum