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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver
4
Datasheet
3.0
4.0
Register Definitions
................................................................................................26
Application Information
.........................................................................................33
4.1
Fiber Optic Module Interface...............................................................................33
4.2
Coax Interface.....................................................................................................33
Test Specifications
..................................................................................................37
Mechanical Specifications
...................................................................................48
Notes
.............................................................................................................................49
5.0
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Figures
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LXT6155 Pin Assignments
LXT6155 System Interface..................................................................................14
Framing State......................................................................................................16
Criteria for LOS Output .......................................................................................16
Receive Frame Synchronization and Frame Pulse Position...............................17
Example of CMI Encoded Binary Signal .............................................................17
Hardware Mode...................................................................................................20
Software Mode....................................................................................................23
Serial Data Output Word Structure (Read Cycle: R/W=High).............................23
Serial Data Input Word Structure (Write Cycle: R/W = Low)...............................23
Serial Interface....................................................................................................24
Parallel Interface .................................................................................................24
Local Loopback...................................................................................................25
Remote Loopback...............................................................................................25
Rx Digital 2, Register #13 (Address A<3:0>=11001) ..........................................31
3.3 V LVPECL to 3.3 V LVPECL Interface..........................................................34
75 W Coax Cable Interface.................................................................................35
Transmit Parallel Input Data Timing (See Table 28)...........................................38
Transmit Serial Input Data Timing (See Table 28)..............................................38
Receive Serial Output Data Timing (See Table 30)............................................40
Receive Parallel Output Data Timing (See Table 30) .........................................40
Microprocessor Input Timing Diagram ................................................................42
Microprocessor Output Timing Diagram .............................................................42
CMI Encoded Zero per G.703 and STS-3...........................................................43
CMI Encoded One per G.703 and STS-3 ...........................................................43
Jitter Tolerance ...................................................................................................44
Generation Measurement Filter Characteristics.................................................45
Typical Coax Jitter Transfer ................................................................................46
Typical Fiber Jitter Transfer ...............................................................................47
LXT6155LE Package Specification.....................................................................48
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