MIC3001 Datasheet, PDF (5/74 Pages) Micrel Semiconductor – SFP Management IC with Internal Calibration

MIC3001
Micrel
Laser Drivers Programmed via a Sink Current .............................................................................................................................. 70
Figure 33. Controlling the Modulation Current via a Sink Current ................................................................................................... 70
Drivers With Monitor Outputs .......................................................................................................................................................... 70
Shutdown Output .............................................................................................................................................................................. 70
Figure 34. Redundant Switch Circuits ............................................................................................................................................. 71
Temperature Sensing ....................................................................................................................................................................... 71
Table 25. Contributors to Self-Heating ............................................................................................................................................ 71
Remote Sensing ................................................................................................................................................................................ 71
Table 24. Transistors Suitable for Use as Remote Diodes ............................................................................................................. 71
Minimizing Errors .............................................................................................................................................................................. 71
Self-Heating ....................................................................................................................................................................................... 71
Series Resistance with External Temperature Sensor .................................................................................................................. 72
XPN Filter Capacitor Selection ........................................................................................................................................................ 72
XPN Layout Considerations ............................................................................................................................................................. 72
Figure 35. Guard Traces and Kelvin Return for Remote Thermal Diode ........................................................................................ 72
Layout Considerations ..................................................................................................................................................................... 72
Small Form-Factor Pluggable (SFP) Transceivers ........................................................................................................................ 72
Figure 36. Typical SFP Control and Status I/O Signal Routing (not to scale) ................................................................................. 72
Power Supplies ................................................................................................................................................................................. 73
Figure 37. Power Supply Routing and Bypassing ........................................................................................................................... 73
Using The MIC3001 In a 5V System ................................................................................................................................................. 73
Package Information ......................................................................................................................................................................... 74
24-Pin MLF™ (ML) ........................................................................................................................................................................... 74
August 2004
5
M9999-082404