T7507 Quad PCM Codec with Filters,
Termination Impedance, and Hybrid Balance
Data Sheet
August 1999
Table of Contents (continued)
Tables
Page
Table 1. Pin Descriptions ........................................................................................................................................5
Table 2. Microprocessor Interface Descriptions ....................................................................................................11
Table 3. C0, C1 Channel Select .............................................................................................................................12
Table 4. M, D4, D3, D2, D1, D0 Mode Select and Data .........................................................................................12
Table 5. M = 0 Mode (PCM Time-Slot Assignment) ...............................................................................................12
Table 6. M = 1, D4 = 0 Mode (Relay State Control and Delayed/Nondelayed Timing) .........................................13
Table 7. M = 1, D4 = 1 Mode (Codec State Control and SLIC State Control) .......................................................13
Table 8. Digital Interface .......................................................................................................................................15
Table 9. Power Dissipation ....................................................................................................................................16
Table 10. Analog Interface ....................................................................................................................................16
Table 11. Absolute Gain ........................................................................................................................................17
Table 12. Gain Tracking .........................................................................................................................................17
Table 13. Distortion ................................................................................................................................................17
Table 14. Envelope Delay Distortion .....................................................................................................................18
Table 15. Decoder Limits Relative to Gain at 1020 Hz ...........................................................................................19
Table 16. Encoder Limits, Includes Effect of Termination Impedance Filter Relative to Gain at 1020 Hz ..............19
Table 17. Termination Impedance Limits Relative to Gain at 1020 Hz...................................................................19
Table 18. Hybrid Path Limits Relative to Gain at 1020 Hz......................................................................................19
Table 19. Noise .....................................................................................................................................................20
Table 20. Interchannel Crosstalk (Between Channels) .........................................................................................20
Table 21. Gain ........................................................................................................................................................21
Table 22. Gain Flatness—In Band .........................................................................................................................21
Table 23. Gain Flatness—Out of Band—Low Frequencies ..................................................................................22
Table 24. T7507 Microprocessor Interface Timing .................................................................................................23
Table 25. Clock Section ..........................................................................................................................................25
Table 26. T7507 Transmit Section (Delayed Timing)..............................................................................................25
Table 27. T7507 Transmit Section (Nondelayed Timing)........................................................................................25
Table 28. T7507 Receive Section ..........................................................................................................................25
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