CPC5604
Table of Contents
Table 1 - Performance Specifications ........................................................................................................................3
Table 1 - Performance Specifications (Continued) ....................................................................................................4
Table 2 - Package Pinout ..........................................................................................................................................5
Applications ................................................................................................................................................................6
North American Reference Design Schematic ....................................................................................................6
Table 3 - North American Reference Design Bill of Materials....................................................................................7
International Reference Design Schematic................................................................................................................8
Table 4 - International Reference Design Bill of Materials ........................................................................................9
CTR-21 Reference Design Schematic ....................................................................................................................10
Table 5 - Reference Design Schematic Bill of Materials..........................................................................................11
CTR-21 with Exceptions Reference Design Schematic ..........................................................................................12
Table 6 - CTR-21 with Exceptions Reference Design Bill of Materials ..................................................................13
Introduction ..............................................................................................................................................................14
Ring Detection via Snoop Circuit........................................................................................................................14
Caller ID (CID) Detection via Snoop Circuit ......................................................................................................14
Hook Switch Control ..........................................................................................................................................14
Transmit Signal ..................................................................................................................................................14
Receive Signal Path ................................................................................................................................................15
Transmit Signal Path ................................................................................................................................................15
Ring Signal Detection ..............................................................................................................................................16
Figure 3 - Caller ID Protocol ....................................................................................................................................17
DC Charcteristics......................................................................................................................................................17
Figure 4 - Outlook DC Resistance Tip/Ring Setup ..................................................................................................18
On-Hook Resistance ................................................................................................................................................18
Current Limiting ........................................................................................................................................................18
CTR-21 Compliance ................................................................................................................................................18
AC Characteristics....................................................................................................................................................18
Differential and Single Ended Mode ........................................................................................................................19
Receive and Transmit Frequency Response ..........................................................................................................19
Figure 4C - Transmit Frequency Response Setup ..................................................................................................20
Figure 4D - Transmit Frequency Response Tx ......................................................................................................20
Distortion ..................................................................................................................................................................21
Figure 5C - Transmit Distortion Text Tx to Tip/Ring Setup ....................................................................................22
Figure 5D - Transmit Distortion on Tip/Ring ............................................................................................................22
Trans-Hybrid Loss ....................................................................................................................................................23
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