DS1877 SFP Controller for Dual Rx Interface General Description Features The DS1877 controls and monitors all functions for SFF, S Meets All SFF-8472 Control and Monitoring SFP, and SFP+ modules including all SFF-8472 func- Requirements tionality. The device supports all LOS functions for two S Four Analog Monitor Channels: Temperature, receivers, and continually monitors for LOS of either V , RSSI1, RSSI2 CC channel. Four ADC channels monitor V , temperature, CC RSSI1 and RSSI2 Support Internal and External and two differential external monitor inputs that can be Calibration used to meet all monitoring requirements. Two digital- Differential Input to-analog converter (DAC) outputs with temperature- Common-Mode Range from GND to V CC indexed lookup tables (LUTs) are available for additional Scalable Dynamic Range monitoring and control functionality. Internal Direct-to-Digital Temperature Sensor Alarm and Warning Flags for All Monitored Applications Channels SFF, SFP, and SFP+ Transceiver Modules S Two 10-Bit Delta-Sigma Outputs Dual Rx Video SFPs Each Controlled by 72-Entry Temperature LUT S Digital I/O Pins: Four Inputs, Four Outputs Ordering Information S Comprehensive Loss-of-Signal (LOS) Detection PART TEMP RANGE PIN-PACKAGE System DS1877T+ -40NC to +95NC 28 TQFN-EP* S Flexible, Two-Level Password Scheme Provides DS1877T+T&R -40NC to +95NC 28 TQFN-EP* Three Levels of Security +Denotes a lead(Pb)-free/RoHS-compliant package. S 120 Bytes of Password-1 Protected Memory T&R = Tape and reel. S 128 Bytes of Password-2 Protected Memory in *EP = Exposed pad. Main Device Address S 256 Additional Bytes Located at A0h Slave Address S Receiver 1 is Accessed at A2h Slave Address S Receiver 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 0.75mm) 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. 19-5188 Rev 1 4/10DS1877 SFP Controller for Dual Rx Interface TABLE OF CONTENTS Absolute Maximum Ratings ................ 5 Recommended Operating Conditions ................ 5 DC Electrical Characteristics ................. 5 DAC1, DAC2 Electrical Characteristics ............... 6 Analog Voltage Monitoring Characteristics .............. 6 AC Electrical Characteristics ................... 6 Analog Quick-Trip Characteristics ............... 7 Quick-Trip Timing Characteristics................ 7 Digital Thermometer 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................... 13 DACs During Power-Up ...................................................................... 13 Quick-Trip Timing ........................................................................... 13 Monitors and Fault Detection .................................................................. 14 Monitors ................................................................................ 14 Two Quick-Trip Monitors and Alarms .......................................................... 14 Four ADC Monitors and Alarms.............................................................. 14 ADC Timing ............................................................................. 14 Right-Shifting ADC Result .................................................................. 14 Differential RSSI1/RSSI2 Inputs .............................................................. 15 Enhanced RSSI Monitoring (Dual-Range Functionality) ........................................... 15 Crossover Enabled........................................................................ 16 Crossover Disabled ....................................................................... 16 Low-Voltage Operation ....................................................................... 16 Delta-Sigma Outputs......................................................................... 18 Digital I/O Pins.............................................................................. 19 LOS1, LOS2, and LOSOUT ................................................................. 19 INX, RSEL, OUTX, RSELOUT ............................................................... 19 FAULT Output............................................................................20 Die Identification ............................................................................20 2 Maxim Integrated