DS1874 Overview
The DS1874 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality. The bination of the DS1874 with the MAX3798/MAX3799 laser driver/limiting amplifier provides APC loop, modulation current control, and eye safety functionality. The DS1874 continuously monitors for high output current, high bias current, and low and high transmit power to ensure that laser shutdown for...
DS1874 Key Features
- Meets All SFF-8472 Control and Monitoring Requirements
- Laser Bias Controlled by APC Loop and Temperature LUT to pensate for Tracking Error
- Laser Modulation Controlled by Temperature LUT
- Six Analog Monitor Channels: Temperature, VCC, MON1-MON4 MON1-MON4 Support Internal and External Calibration Scalable Dy
- Two 9-Bit Delta-Sigma Outputs with 36 Entry Temperature LUTs
- Digital I/O Pins: Five Inputs, Five Outputs
- prehensive Fault-Measurement System with Maskable Laser Shutdown Capability
- Flexible, Two-Level Password Scheme Provides Three Levels of Security
- 256 Additional Bytes Located at A0h Slave Address
- I2C-patible Interface