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Lucent Technologies Inc.
Preliminary Data Sheet
July 2000
T8535/T8536 Quad Programmable Codec
Table of Contents
Contents
Page
Features ....................................................................................................................................................................1
Description.................................................................................................................................................................1
General Description...................................................................................................................................................5
Pin Information ..........................................................................................................................................................7
Functional Description.............................................................................................................................................15
Clocking Considerations .......................................................................................................................................15
The Control Interface ............................................................................................................................................15
Modes ................................................................................................................................................................15
Protocol..............................................................................................................................................................16
Write Command .................................................................................................................................................18
Read Command.................................................................................................................................................20
Fast Scan Mode.................................................................................................................................................24
Write All Channels..............................................................................................................................................27
Memory Control Mapping...................................................................................................................................28
Reset Functionality ...............................................................................................................................................28
Standby Mode.......................................................................................................................................................28
Test Capabilities ...................................................................................................................................................28
SLIC Control Capabilities......................................................................................................................................28
Suggested Initialization Procedures......................................................................................................................29
Signal Processing .................................................................................................................................................29
Absolute Maximum Ratings.....................................................................................................................................30
Operating Ranges ...................................................................................................................................................30
Handling Precautions ..............................................................................................................................................30
Electrical Characteristics.........................................................................................................................................31
dc Characteristics .................................................................................................................................................31
Analog Interface....................................................................................................................................................32
Gain and Dynamic Range.....................................................................................................................................33
Noise Characteristics............................................................................................................................................35
Distortion and Group Delay...................................................................................................................................36
Crosstalk...............................................................................................................................................................37
Timing Characteristics.............................................................................................................................................38
Control Interface Timing........................................................................................................................................38
Serial Control Port Timing..................................................................................................................................38
Normal Mode......................................................................................................................................................39
Byte-by-Byte Mode.............................................................................................................................................39
PCM Interface Timing ...........................................................................................................................................40
Single-Clocking Mode ........................................................................................................................................40
Double-Clocking Mode.......................................................................................................................................42
Software Interface ...................................................................................................................................................44
Applications.............................................................................................................................................................48
Outline Diagrams.....................................................................................................................................................49
100-Pin TQFP.......................................................................................................................................................49
68-Pin PLCC.........................................................................................................................................................50
64-Pin TQFP.........................................................................................................................................................51
44-Pin PLCC.........................................................................................................................................................52
Ordering Information................................................................................................................................................53