DS1864 Datasheet | Maxim Integrated

Description The DS1864 is an SFF-8472 multisource agreement (MSA)-pliant laser controller/monitor that is ideal for SFP optical-transceiver module designs. It controls laser driver bias and modulation currents through a pair of temperature-controlled current-sink DACs. System diagnostics are provided by monitoring three analog inputs, VCC, and temperature through the internal temperature sensor. The device also contains all EEPROM required by the SFF-8472 MSA, including all A0h and A2h EEPROM. The DS1864’s memory map can be configured to be patible with both the DS1852/DS1856 and the DS1859 memory maps. Additionally, memory is secured with customerconfigurable two-level password protection. Eye-safety features are integrated by three fast-trip parators that monitor transmit-power high, transmitpower low, and bias current. The fast-trip parators drive a FET driver output to disable the laser in the case of eye safety violation. With its integrated laser driver control, system diagnostics, eye-safety features , and internal temperature sensor, the DS1864 provides an ideal solution for SFP optical transceiver modules by improving system performance, reducing board space, and simplifying design. Features - SFF-8472 MSA patible - Five Monitored Channels (Temperature, VCC, MON1, MON2, MON3) Three External Analog Inputs (MON1, MON2, MON3) Support Internal and External Calibration Enhanced RSSI Monitoring (26d B Range, 0.5d B Accuracy) Scalable Dynamic Range for External Analog Inputs Internal Direct-to-Digital Temperature Sensor Alarm and Warning Flags for All Monitored Channels - Two Linear 8-Bit Current-Sink DACs Two User-Selectable Full-Scale Ranges (0.5m A or 1.5m A) Values Changeable Every 2°C - Three Fast-Trip parators (Tx Power High, Tx Power Low, and Bias Current) for Eye Safety - Flexible, Two Level Password Scheme Provides Three Levels of Security - Provides All Optional and Required SFF-8472 MSA EEPROM (Both A0h and A2h Memory) - I2C-patible Serial Interface -...