DS2148 データシートの表示（PDF） - Maxim Integrated
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DS2148 Datasheet PDF : 73 Pages
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DS2148/DS21Q48
TABLE OF CONTENTS
1 DETAILED DESCRIPTION .................................................................................................. 5
1.1 FUNCTION DESCRIPTION..................................................................................................................5
1.2 DOCUMENT REVISION HISTORY .......................................................................................................6
2 PIN DESCRIPTION............................................................................................................ 10
3 HARDWARE MODE .......................................................................................................... 23
3.1 REGISTER MAP .............................................................................................................................23
3.2 PARALLEL PORT OPERATION .........................................................................................................24
3.3 SERIAL PORT OPERATION..............................................................................................................24
4 CONTROL REGISTERS .................................................................................................... 28
4.1 DEVICE POWER-UP AND RESET .....................................................................................................31
5 STATUS REGISTERS ....................................................................................................... 34
6 DIAGNOSTICS .................................................................................................................. 39
6.1 IN-BAND LOOP CODE GENERATION AND DETECTION ......................................................................39
6.2 LOOPBACKS ..................................................................................................................................43
6.2.1 Remote Loopback (RLB) ......................................................................................................43
6.2.2 Local Loopback (LLB) ...........................................................................................................43
6.2.3 Analog Loopback (ALB) ........................................................................................................44
6.2.4 Dual Loopback (DLB)............................................................................................................44
6.3 PRBS GENERATION AND DETECTION ............................................................................................44
6.4 ERROR COUNTER..........................................................................................................................44
6.4.1 Error Counter Update............................................................................................................45
6.5 ERROR INSERTION ........................................................................................................................45
7 ANALOG INTERFACE ...................................................................................................... 46
7.1 RECEIVER .....................................................................................................................................46
7.2 TRANSMITTER ...............................................................................................................................47
7.3 JITTER ATTENUATOR .....................................................................................................................47
7.4 G.703 SYNCHRONIZATION SIGNAL.................................................................................................48
8 DS21Q48 QUAD LIU ......................................................................................................... 55
9 DC CHARACTERISTICS ................................................................................................... 59
9.1 THERMAL CHARACTERISTICS ................................................................................................60
10 AC CHARACTERISTICS ................................................................................................... 61
11 PACKAGE INFORMATION ............................................................................................... 70
11.1 44-PIN TQFP (56-G4012-001) .....................................................................................................70
11.2 49-BALL CSGBA (7MM X 7MM) (56-G6006-001) ...........................................................................71
11.3 144-BALL CSBGA (17MM X 17MM) (56-G6011-001) .....................................................................72
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