CS61884-IQZ Cirrus Logic Inc, CS61884-IQZ Datasheet - Page 53

• Manufacturer Part Number: CS61884-IQZ
• Description: IC,PCM TRANSCEIVER,OCTAL,CEPT PCM-30/E-1,QFP,144PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

Specifications of CS61884-IQZ

• Rohs Compliant: YES

DS485F1
18.1 Transformer specifications
Recommended transformer specifications are
shown in
CS61884 should meet or exceed these specifica-
tions.
18.2 Crystal Oscillator Specifications
When a reference clock signal is not available, a
CMOS crystal oscillator may be used as the refer-
ence clock signal. The oscillator must have a mini-
Turns Ratio Receive/Trans-
mit
Primary Inductance
Primary Leakage Induc-
tance
Secondary leakage Induc-
tance
Inter winding Capacitance
ET-Constant
Descriptions
Table 12. Transformer Specifications
Table
12. Any transformer used with the
1.5mH min. @ 772 kHz
0.3 µH max @ 772 kHz
0.4 µH max @ 772 kHz
18pF max, primary to
Specifications
16V - µs min.
secondary
1:2
mum symmetry of 40-60% and minimum stability
of + 100ppm for both E1 and T1/J1 applications.
18.3 Designing for AT&T 62411
For information on requirements of the AT&T
62411 and the design of the appropriate system
synchronizer, refer to Application Note AN012
“AT&T 62411 Design Considerations - Jitter and
Synchronization” and Application Note AN011
“Jitter Testing Procedures for Compliance with
AT&T 62411”.
18.4 Line Protection
Secondary protection components can be added to
the line interface circuitry to provide lightning
surge and AC power-cross immunity. For addition-
al information on the different electrical safety
standards and specific applications circuit recom-
mendations, refer to Application Note AN034
“Secondary Line Protection for T1 and E1 Cards”.
CS61884
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