Micrel, Inc.

MIC3002

July 2007

3

M9999-073107-B

Contents

Pin Configuration............................................................................................................................................................. 7

Pin Description ................................................................................................................................................................ 7

Absolute Maximum Ratings ............................................................................................................................................ 9

Operating Ratings ........................................................................................................................................................... 9

Electrical Characteristics................................................................................................................................................. 9

Timing Diagram ............................................................................................................................................................. 14

Address Map ................................................................................................................................................................. 15

Block Diagram ............................................................................................................................................................... 18

Analog-to-Digital Converter/Signal Monitoring.............................................................................................................. 18

Temperature Reading Compensation........................................................................................................................... 19

Alarms and Warnings Interrupt Source Masking .......................................................................................................... 20

Alarms and Warnings as TXFAULT Source ................................................................................................................. 21

Alarms and Warnings Latch .......................................................................................................................................... 21

SMBus Multipart Support .............................................................................................................................................. 21

Calibration Modes ......................................................................................................................................................... 22

A/ External Calibration ............................................................................................................................................ 22

Voltage.................................................................................................................................................................... 22

Temperature ........................................................................................................................................................... 22

Bias Current............................................................................................................................................................ 22

TX Power ................................................................................................................................................................ 22

RX Power................................................................................................................................................................ 23

B/ Internal Calibration ............................................................................................................................................. 23

Temperature Offset................................................................................................................................................. 25

C/ ADC Result Registers Reading.......................................................................................................................... 25

RXPOT ......................................................................................................................................................................... 25

Laser Diode Bias Control .............................................................................................................................................. 25

Laser Modulation Control .............................................................................................................................................. 26

Power ON and Laser Start-Up ...................................................................................................................................... 27

Fault Comparators ........................................................................................................................................................ 28

SHDN and TXFIN.......................................................................................................................................................... 29

Temperature Measurement........................................................................................................................................... 29

Diode Faults .................................................................................................................................................................. 29

Temperature Compensation ......................................................................................................................................... 29

Alarms and Warning Flags............................................................................................................................................ 32

Control and Status I/O................................................................................................................................................... 32

System Timing............................................................................................................................................................... 34

Warm Resets................................................................................................................................................................. 36

Power-On Hour Meter ................................................................................................................................................... 36

Test and Calibration Features....................................................................................................................................... 37

Serial Port Operation..................................................................................................................................................... 38

Page Writes................................................................................................................................................................... 38

Acknowledge Polling....................................................................................................................................................... 39

Write Protection and Data Security .................................................................................................................................. 39

OEM Password........................................................................................................................................................ 39

User Password......................................................................................................................................................... 39