DS2148G datasheet(2/73 Pages) MAXIM

2 / 73 page

DS2148/DS21Q48

2 of 73

TABLE OF CONTENTS

DETAILED DESCRIPTION .................................................................................................. 5

1.1

FUNCTION DESCRIPTION..................................................................................................................5

1.2

DOCUMENT REVISION HISTORY .......................................................................................................6

PIN DESCRIPTION............................................................................................................ 10

HARDWARE MODE .......................................................................................................... 23

3.1

REGISTER MAP .............................................................................................................................23

3.2

PARALLEL PORT OPERATION .........................................................................................................24

3.3

SERIAL PORT OPERATION..............................................................................................................24

CONTROL REGISTERS .................................................................................................... 28

4.1

DEVICE POWER-UP AND RESET.....................................................................................................31

STATUS REGISTERS ....................................................................................................... 34

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

ANALOG INTERFACE ...................................................................................................... 46

7.1

RECEIVER .....................................................................................................................................46

7.2

TRANSMITTER ...............................................................................................................................47

7.3

JITTER ATTENUATOR .....................................................................................................................47

7.4

G.703 SYNCHRONIZATION SIGNAL.................................................................................................48

DS21Q48 QUAD LIU ......................................................................................................... 55

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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