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DS1864

Maxim Integrated Products
Part Number DS1864
Manufacturer Maxim Integrated Products
Description SFP Laser Controller and Diagnostic IC
Published Jul 30, 2007
Detailed Description www.DataSheet4U.com Rev 0; 4/06 SFP Laser Controller and Diagnostic IC General Description The DS1864 is an SFF-8472 mu...
Datasheet PDF File DS1864 PDF File

DS1864
DS1864

Overview
www.
DataSheet4U.
com Rev 0; 4/06 SFP Laser Controller and Diagnostic IC General Description The DS1864 is an SFF-8472 multisource agreement (MSA)-compliant 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 compatible 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 comparators that monitor transmit-power high, transmitpower low, and bias current.
The fast-trip comparators 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 Compatible ♦ Five Monitored Channels (Temperature, VCC, MON1, MON2, MON3) Three External Analog Inputs (MON1, MON2, MON3) Support Internal and External Calibration Enhanced RSSI Monitoring (26dB Range, 0.
5dB 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.
5mA or 1.
5mA) Values Changeable Every 2°C ♦ Three Fast-Trip Comparators (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...


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