Lucent Technologies Inc.

3

Data Sheet

August 1999

Termination Impedance, and Hybrid Balance

T7507 Quad PCM Codec with Filters,

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