Description
P5233 Low Distortion Line Matching Transformer
Features
Lead-free (Pb-free) RoHS compliant Low Distortion 10.4mm (0.41″) Seated Height Industry Standard Pinout IEC 60950 and UL 60950 Certified Supplementary Insulation for a Primary Circuit Extended Frequency Response Flat TX and RX Responses Simple Matching Low Insertion Loss High Thermal Stability Applications V.90 and V.92 Modems V.34 Modems Fax Machines Instrumentation Set Top Box/Web browsing Internet Feature Phones
Lead-free (Pb-free) RoHS compliant Low Distortion 10.4mm (0.41″) Seated Height Industry Standard Pinout IEC 60950 and UL 60950 Certified Supplementary Insulation for a Primary Circuit Extended Frequency Response Flat TX and RX Responses Simple Matching Low Insertion Loss High Thermal Stability
Applications
V.90 and V.92 Modems V.34 Modems Fax Machines Instrumentation Set Top Box/Web browsing Internet Feature Phones
DESCRIPTION
P5233 is intended for low cost V.90 and V.92 (56kbps) modems and other high-speed applications. is a direct substitute for P3356, being mechanically compatible and having identical signal/distortion and matching characteristics, and suitable for supplementary insulation, 250V working. P5233 uses patented design and construction methods to achieve excellent signal performance and safety isolation to international standards. P5233 has exceptionally flat frequency response from a 3dB bandwidth of 60kHz and requires only the very simplest of matching to achieve good return loss and transhybrid loss across the voiceband, with very low levels of signal distortion at signal frequencies as low P5233 is certified to IEC 60950 and a UL Recognized Component and is supported by an IEC CB certificate. The part is completely lead-free, compliant with RoHS Directive 2002/95/EC, and suitable for lead-free and conventional processing.
SPECIFICATIONS
= 25ºC and as circuit Fig. 2 unless otherwise stated. Parameter Conditions Insertion Loss Frequency Response LF -3dB cutoff HF -3dB cutoff -3dBm in line -10dBm in line 5kHz Method 50Hz DC Min Typ Max +70 +85 Units dB Hz kHz dB dBm dB kVrms kV ºC
Return Loss(5) Transhybrid Loss(5) Third Harmonic Distortion(1) Balance Voltage Isolation(2) Operating Range: Functional Storage
Lumped equivalent circuit parameters as Fig. 1 DC resistance (3)(6) Leakage inductance, L Shunt inductance, Lp(4) Shunt loss, 200Hz 10mV Primary resistance RDCp Secondary resistance RDCs H k
Notes: Equivalent Circuit 1. Third harmonic typically exceeds other Fig. 1 harmonics 10dB. 2. Components are 100% tested 3.25kVDC. 3. Caution: do not pass DC through windings. IDEAL Telephone line current must be diverted using 1:1 semiconductor line hold circuit or choke. 4. At signal levels greater than 100mV, Lp will increase and Rp will decrease slightly but the effect is usually favourable to the return loss characteristic. 5. Return loss and transhybrid loss can be improved 30dB in improved matching circuit. The values shown relate to the simplest configuration, Fig. 6. At signal frequencies, the primary and secondary resistance appear in series with the load and therefore present a sum of resistances in the range 165-207 in common with P3356.
The following recommendations start with the simplest implementations and progress to enhanced performance utilizing additional components. Good performance is achieved even with the simplest configurations. The implementations assume a low impedance balanced TX drive and a relatively high impedance RX input, as is commonly available, though use with other TX/RX arrangements is straightforward. Note that there are no changes to components on the line side, or in the hybrid, whether 600 or complex reference impedance selected, thus assisting country configuration. For complex impedance, the matching circuits derived are suitable for reference impedances of the type + 750//150nF e.g. European CTR21 and + 820//120nF (or 115nF) e.g. Australia, South Africa, etc., and yield similar performance characteristics. For other impedances, please contact Profec Technologies. Minimum Cost Implementations
* Note: 100nF capacitor should have a temperature stable dielec tric
Insertion Loss: @ 2kHz Frequency Response 10kHz Return Loss: 4kHz Transhybrid Loss: 4kHz
Insertion Loss: @ 2kHz Frequency Response 4kHz Return Loss: 4kHz Transhybrid Loss: 4kHz
Insertion Loss: @ 2kHz Frequency Response 10kHz Return Loss: 4kHz Transhybrid Loss: 10kHz
Insertion Loss: @ 2kHz Frequency Response 4kHz Return Loss: 4kHz Transhybrid Loss: 4kHz
Manufacturer Part Number: P5233
Manufacturer: Etal
