Datasheet

DS21348/DS21Q348
3 of 76
TABLE OF CONTENTS
1. INTRODUCTION.................................................................................................................. 6
1.1 DOCUMENT REVISION HISTORY...............................................................................................6
2. PIN DESCRIPTION............................................................................................................ 10
2.1 PIN DESCRIPTIONS ........................................................................................................................14
3. HARDWARE MODE .......................................................................................................... 25
3.1 REGISTER MAP .............................................................................................................................25
3.2 PARALLEL PORT OPERATION .........................................................................................................26
3.3 SERIAL PORT OPERATION..............................................................................................................26
4. CONTROL REGISTERS.................................................................................................... 29
4.1 DEVICE POWER-UP AND RESET .....................................................................................................32
5. STATUS REGISTERS ....................................................................................................... 36
6. DIAGNOSTICS .................................................................................................................. 41
6.1 IN-BAND LOOP CODE GENERATION AND DETECTION ......................................................................41
6.2 LOOPBACKS ..................................................................................................................................46
6.2.1 Remote Loopback (RLB) ..................................................................................................................... 46
6.2.2 Local Loopback (LLB) .......................................................................................................................... 46
6.2.3 Analog Loopback (ALB) ....................................................................................................................... 46
6.2.4 Dual Loopback (DLB)........................................................................................................................... 46
6.3 PRBS GENERATION AND DETECTION ............................................................................................47
6.4 ERROR COUNTER..........................................................................................................................47
6.4.1 Error Counter Update........................................................................................................................... 48
6.5 ERROR INSERTION ........................................................................................................................48
7. ANALOG INTERFACE ...................................................................................................... 49
7.1 RECEIVER .....................................................................................................................................49
7.2 TRANSMITTER ...............................................................................................................................50
7.3 JITTER ATTENUATOR .....................................................................................................................50
7.4 G.703 SYNCHRONIZATION SIGNAL .................................................................................................51
8. DS21Q348 QUAD LIU ....................................................................................................... 58
9. DC CHARACTERISTICS................................................................................................... 62
10. THERMAL CHARACTERISTICS....................................................................................... 63
11. AC CHARACTERISTICS................................................................................................... 64
12. PACKAGE INFORMATION ............................................................................................... 73
12.1 44-PIN TQFP (56-G4012-001) .....................................................................................................73
12.2 49-BALL CSGBA (7MM X 7MM) (56-G6006-001) ...........................................................................74
12.3 144-BALL CSBGA (17MM X 17MM) (56-G6011-001) .....................................................................75