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CPC5621A Datasheet(PDF) 6 Page - Clare, Inc. |
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CPC5621A Datasheet(HTML) 6 Page - Clare, Inc. |
6 / 18 page CPC5620/CPC5621 6 www.clare.com Rev. 0.E 2. Application Circuits LITELINK can be used with telephone networks world- wide. Some public telephone networks, notably in North America and Japan require resistive line temri- nation. Other telephone networks in Europe and else- where require reactive line termination. The application circuits below address both line termi- nation models. The reactive termination application circuit (see Section 2.2 on page 8) describes a TBR-21 implementation. This circuit can be adapted easily for other reactive termination needs. Worldwide applica- tions of LITELINK are described more fully in Clare application note AN-147, Worldwide Application of LITELINK. 2.1 Resistive Termination Application Circuit Figure 3. Resistive Termination Application Circuit Schematic ¹This design was tested and found to comply with FCC Part 68 with this part. Other compliance requirements may require a different part. ²Higher-noise power supplies may require substitution of a 220 µH inductor, Toko 380HB-2215 or similar. See the Power Quality section of Clare appli- cation note AN-146, Guidelines for Effective LITELINK Designs for more information. ³Optional for enhanced trans-hybrid loss. 1 2 + - OH RING CID TX+ RX+ TX- RX- 3.3 or 5 V C13 0.1 C14 0.1 C2 0.1 C4 0.1 R1 (R ) 80.6K 1% TX R23² 10 BR- BR- BR- TIP RING U1 LITELINK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 VDD TXSM TX- TX+ TX GND RX- RX+ SNP+ SNP- RXF RX MODE OH RING CID REFL TXF ZTX ZNT TXSL BR- NTS GAT NTF DCS1 DCS2 ZDC BR- RPB RXS VDDL DB1 SP1¹ BR- BR- A A A C9 0.1 C16 10 FB1 600 200 mA Ω C1 1 R5 (R ) 60.4K 1% TXF R76 (R ) 200K 1% HNTF R13 (R ) 1M 1% NTS C10 0.01 500V R15 (R ) 1.69M 1% DCS2 R20 (R ) 2 VDDL R21 (R ) 1% DCS1B 6.2 M R22 (R ) 6.8 M 1% DCS1A C12 (C ) 0.027 DCS R2 (R ) 130K 1% RXF R3 (R ) 1.5M 1% SNPD C7 (C ) 220pF 2000V SNP- C8 (C ) 220pF 2000V SNP+ R6 (R ) 1.8M 1/10W 1% SNP-2 R44 (R ) 1.8M 1/10W 1% SNP-1 R7 (R ) 1.8M 1/10W 1% SNP+2 R45 (R ) 1.8M 1/10W 1% SNP+1 R4 (R ) 68.1 1% PB BR- NOTE: Unless otherwise noted, all resistors are in Ohms, 5%. All capacitors are in microFarads. R14 (R ) 47 GAT Q1 CPC5602C C21 (C ) 100 pF GAT R10 (R ) 301 1% ZNT R18 (R ) 3.32K 1% ZTX R12 (R ) 499K 1% NTF R16 (R ) 8.2 1% ZDC BR- BR- C15 0.01 500V C18 15 pF³ R8 (R ) 221K 1% HTX R75 (R ) 261K 1% NTX |
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