Micrel, Inc.

MIC3001

August 2004

5

M9999-082404-A

List of Figures

Figure 1. MIC3001 Block Diagram ...................................................................................................................................................17

Figure 2. Analog-to-Digital Converter Block Diagram.......................................................................................................................18

Figure 3. RXPOT Block Diagram .....................................................................................................................................................22

Figure 4. MIC3001 APC and Modulation Control Block Diagram ....................................................................................................22

Figure 5. Programmable Feedback Resistor....................................................................................................................................22

Figure 6. Transmitter Configurations Supported by MIC3001 .........................................................................................................23

Figure 7. V

MOD

Configured as Voltage Output with Gain .................................................................................................................23

Figure 9. Fault Comparator Logic.....................................................................................................................................................25

Figure 10. Saturation Detector .........................................................................................................................................................26

Figure 11. RXLOS Comparator Logic ..............................................................................................................................................26

Figure 12. Examples of LUTOFF Operation.....................................................................................................................................29

Figure 13. Temperature Compensation Examples...........................................................................................................................30

Figure 14. Control and Status I/O Logic ...........................................................................................................................................32

Figure 15. Transmitter ON-OFF Timing ...........................................................................................................................................32

Figure 16. Initialization Timing with TXDISABLE Asserted ..............................................................................................................32

Figure 17. Initialization Timing with TXDISABLE Not Asserted........................................................................................................33

Figure 18. Loss-of-Signal (LOS) Timing...........................................................................................................................................33

Figure 20. Successfully Clearing a Fault Condition..........................................................................................................................34

Figure 21. Unsuccessful Attempt to Clear a Fault ............................................................................................................................34

Figure 22. Write Byte Protocol .........................................................................................................................................................36

Figure 23. Read Byte Protocol .........................................................................................................................................................36

Figure 24. Read_Word Protocol.......................................................................................................................................................36

Figure 25. Four-Byte Page_White Protocol......................................................................................................................................37

Figure 26. Example APC Circuit for Common-Cathode TOSA.........................................................................................................69

Figure 27. Example APC Circuit for Common Anode TOSA............................................................................................................69

Figure 31. Controlling the SY88932 Modulation Current..................................................................................................................71

Figure 32. Controlling the SY89307 Modulation Current..................................................................................................................72

Figure 33. Controlling the Modulation Current via a Sink Current ...................................................................................................72

Figure 34. Redundant Switch Circuits ..............................................................................................................................................73

Figure 35. Guard Traces and Kelvin Return for Remote Thermal Diode.........................................................................................75

Figure 36. Typical SFP Control and Status I/O Signal Routing (not to scale) .................................................................................75

Figure 37. Power Supply Routing and Bypassing ............................................................................................................................75