DS1876 SFP Controller with Dual LDD Interface General Description Features The DS1876 controls and monitors all functions for S Meets All SFF-8472 Transmitter Control and dual transmitter modules. The memory map is based Monitoring Requirements on SFF-8472. The DS1876 supports APC and modula- S Six Analog Monitor Channels: Temperature, V , CC tion control and eye safety functionality for two laser PMON1, BMON1, PMON2, BMON2 drivers. It continually monitors for high output current, PMON and BMON Support Internal and high bias current, and low and high transmit power to External Calibration ensure that laser shutdown for eye safety requirements Scalable Dynamic Range are met without adding external components. Six ADC Internal Direct-to-Digital Temperature Sensor channels monitor V , temperature, and four external CC Alarm and Warning Flags for All Monitored monitor inputs that can be used to meet all monitoring Channels requirements. S Six Quick Trips for Fast Monitoring of Critical Functions for Laser Safety Applications S Four 10-Bit Delta-Sigma Outputs Dual Tx Video SFP Modules Each Controlled by 72-Entry Temperature Lookup Table (LUT) S Digital I/O Pins: Six Inputs, Five Outputs Ordering Information S Comprehensive Fault Measurement System with PART TEMP RANGE PIN-PACKAGE Maskable Laser Shutdown Capability DS1876T+ -40NC to +95NC 28 TQFN-EP* S Flexible, Two-Level Password Scheme Provides DS1876T+T&R -40NC to +95NC 28 TQFN-EP* Three Levels of Security +Denotes a lead(Pb)-free/RoHS-compliant package. S 256 Additional Bytes Located at A0h Slave T&R = Tape and reel. Address *EP = Exposed pad. S Transmitter 1 is Accessed at A2h Slave Address S Transmitter 2 is Accessed at B2h Slave Address 2 S I C-Compatible Interface S +2.85V to +3.9V Operating Voltage Range S -40NC to +95NC Operating Temperature Range S 28-Pin TQFN (5mm x 5mm x 0.8mm) Package For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com. 19-5153 Rev 0 2/10DS1876 SFP Controller with Dual LDD Interface TABLE OF CONTENTS Absolute Maximum Ratings ................ 5 Recommended Operating Conditions ................ 5 DC Electrical Characteristics ................. 5 MOD , APC Electrical Characteristics ............... 6 Analog Quick-Trip Characteristics ............... 6 Analog Voltage Monitoring Characteristics .............. 6 Digital Thermometer Characteristics ................. 7 AC Electrical Characteristics ................... 7 Quick-Trip Timing Characteristics................ 7 2 I C AC Electrical Characteristics ................ 7 Nonvolatile Memory Characteristics................ 8 Typical Operating Characteristics ............... 9 Pin Configuration ................... 10 Pin Description ................... 10 Block Diagram ................... 11 Typical Operating Circuit ................. 12 Detailed Description................... 12 DACs During Power-Up ...................................................................... 12 DACs as a Function of Transmit Disable (TXD1, TXD2) .............................................. 13 Quick-Trip Timing ........................................................................... 13 Monitors and Fault Detection .................................................................. 14 Monitors ................................................................................ 14 Six Quick-Trip Monitors and Alarms........................................................... 14 Six ADC Monitors and Alarms ............................................................... 14 ADC Timing ............................................................................. 15 Right-Shifting ADC Result .................................................................. 15 Low-Voltage Operation ....................................................................... 15 Delta-Sigma Outputs......................................................................... 16 Digital I/O Pins.............................................................................. 18 IN1, RSEL, OUT1, RSELOUT ................................................................ 18 TXF1, TXF2, TXFOUT, TXD1, TXD2, TXDOUT1, TXDOUT2 ........................................ 18 Transmit Fault (TXFOUT) Output ............................................................. 19 Die Identification ............................................................................ 19 2 I C Communication ................... 19 2 I C Definitions .............................................................................. 19 2 I C Protocol................................................................................ 21 2 Maxim Integrated