DS1886 SFP and PON ONU Controller with Digital LDD Interface General Description Features The DS1886 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 for GPON/EPON and 10G PON ONU applica- S Companion Controller for the MAX3710 Laser tions. The combination of the DS1886 with the MAX3710 Driver/Limiting Amplifier and MAX3945 Limiting supports all transmitter and receiver functionality. The Amplifier DS1886 includes modulation current control and APC set- S MAX3710/DS1886 Combination Supports point control with tracking error adjustment. It continually Broad Spectrum of Continuous Mode and PON monitors RSSI for LOS generation. A 13-bit analog-to- Applications Up to 2.5GHz digital converter (ADC) monitors V , temperature, laser CC bias, laser modulation, and receive power to meet all S Temperature Lookup Table (LUT) to Compensate for APC Tracking Error and Dual Closed-Loop monitoring requirements. Receive power measurement is differential with support for common mode to V . A Variables CC 9-bit digital-to-analog converter (DAC) is included with S Three Laser Control Modes temperature compensation for APD bias control. Dual Closed Loop: Laser Bias and Laser Modulation Are Automatically Controlled with Applications Multiple LUTs to Compensate Dual Closed-Loop Calibration Points SFF, SFP, and PON ONU Modules APC Loop: Laser Bias Automatically Controlled, Laser Modulation Controlled by Temperature LUT Open Loop: Laser Bias and Laser Modulation Ordering Information appears at end of data sheet. Are Controlled by Temperature LUTs S 13-Bit ADC Laser Bias, Laser Power, and Receive Power Support Internal and External Calibration Differential Receive Power Input Scalable Dynamic Range Internal Direct-to-Digital Temperature Sensor Alarm and Warning Flags for All Monitored Channels S 10-Bit DAC with Temperature Compensation for APD Bias S Digital I/O Pins: Transmit Disable Input/Output, Rate Select Input, LOS Input/Output, Transmit Fault Input/Output, and IN1 Status Monitor and Fault input S Comprehensive Fault Measurement System with Maskable Alarm/Warnings S Flexible Password Scheme Provides Three Levels of Security S 256-Byte A0h and 128-Byte Upper A2h EEPROM 2 S I C-Compatible Interface S 3-Wire Master to Communicate with the MAX3710/ MAX3711 Laser Driver/Limiting Amplifier and MAX3945 Limiting Amplifier For pricing, delivery, and ordering information, please contact Maxim Direct at 19-6259 Rev 1 8/12 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.DS1886 SFP and PON ONU Controller with Digital LDD Interface TABLE OF CONTENTS General Description .................. 1 Applications .................... 1 Features ..................... 1 Absolute Maximum Ratings ................. 10 Recommended Operating Conditions ............... 10 DC Electrical Characteristics ................ 10 DAC Electrical Characteristics ................. 11 Analog Voltage Monitoring Characteristics ............. 11 Digital Thermometer Characteristics ................ 11 AC Electrical Characteristics .................. 12 Startup Timing Characteristics ................. 12 3-Wire Digital Interface Specification ................ 12 2 I C AC Electrical Characteristics ................. 13 Nonvolatile Memory Characteristics............... 13 Typical Operating Characteristics ................ 14 Pin Configuration ................... 15 Pin Description ................... 15 Block Diagram ................... 16 Typical Operating CircuitGPON ONU................ 17 Typical Operating Circuit10G PON ONU ............... 18 Detailed Description................... 19 Monitors and Fault Detection .................................................................. 19 Monitors ................................................................................ 19 ADC Monitors and Alarms ..................................................................20 Alarms and Warnings......................................................................20 ADC Timing .............................................................................20 Right-Shifting ADC Result .................................................................. 21 Differential RSSI Input ..................................................................... 21 Laser Bias and Laser Power Through TXMON ..................................................22 Enhanced RSSI Monitoring (Dual Range Functionality) ...........................................22 APD Mode .............................................................................22 PIN Mode ..............................................................................23 Low-Voltage Operation .......................................................................23 Power-On Analog (POA) ...................................................................... 24 Delta-Sigma Output and Reference .............................................................25 Digital I/O Pins..............................................................................26 Maxim Integrated 2