LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver

4

Datasheet

3.0

Register Definitions ................................................................................................ 26

4.0

Application Information.........................................................................................33

4.1

Fiber Optic Module Interface ............................................................................... 33

4.2

Coax Interface ..................................................................................................... 33

5.0

Test Specifications.................................................................................................. 37

6.0

Mechanical Specifications ................................................................................... 48

7.0

Notes ............................................................................................................................. 49

Figures

1

LXT6155 Pin Assignments

................................................................................. 8

2

LXT6155 System Interface.................................................................................. 14

3

Framing State...................................................................................................... 16

4

Criteria for LOS Output ....................................................................................... 16

5

Receive Frame Synchronization and Frame Pulse Position ............................... 17

6

Example of CMI Encoded Binary Signal ............................................................. 17

7

Hardware Mode................................................................................................... 20

8

Software Mode .................................................................................................... 23

9

Serial Data Output Word Structure (Read Cycle: R/W=High) ............................. 23

10

Serial Data Input Word Structure (Write Cycle: R/W = Low)............................... 23

11

Serial Interface .................................................................................................... 24

12

Parallel Interface ................................................................................................. 24

13

Local Loopback ................................................................................................... 25

14

Remote Loopback ............................................................................................... 25

15

Rx Digital 2, Register #13 (Address A<3:0>=11001) .......................................... 31

16

3.3 V LVPECL to 3.3 V LVPECL Interface .......................................................... 34

17

75 W Coax Cable Interface ................................................................................. 35

18

Transmit Parallel Input Data Timing (See Table 28) ........................................... 38

19

Transmit Serial Input Data Timing (See Table 28) .............................................. 38

20

Receive Serial Output Data Timing (See Table 30) ............................................ 40

21

Receive Parallel Output Data Timing (See Table 30) ......................................... 40

22

Microprocessor Input Timing Diagram ................................................................ 42

23

Microprocessor Output Timing Diagram ............................................................. 42

24

CMI Encoded Zero per G.703 and STS-3 ........................................................... 43

25

CMI Encoded One per G.703 and STS-3 ........................................................... 43

26

Jitter Tolerance ................................................................................................... 44

27

Generation Measurement Filter Characteristics................................................. 45

28

Typical Coax Jitter Transfer ................................................................................ 46

29

Typical Fiber Jitter Transfer ............................................................................... 47

30

LXT6155LE Package Specification ..................................................................... 48