SFP Controller 28-Pin TQFN EP

The DS1877 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality. The device supports all LOS functions for two receivers, and continually monitors for LOS of either channel. Four ADC channels monitor VCC, temperature, and two differential external monitor inputs that can be used to meet all monitoring requirements. Two digital-to-analog converter (DAC) outputs with temperature-indexed lookup tables (LUTs) are available for additional monitoring and control functionality.

• Meets All SFF-8472 Control and Monitoring Requirements
• Four Analog Monitor Channels: Temperature, V_CC, RSSI1, RSSI2
  • RSSI1 and RSSI2 Support Internal and External Calibration
  • Differential Input
  • Common-Mode Range from GND to V_CC
  • Scalable Dynamic Range
  • Internal Direct-to-Digital Temperature Sensor
  • Alarm and Warning Flags for All Monitored Channels

Two 10-Bit Delta-Sigma Outputs

Each Controlled by 72-Entry Temperature LUT

Digital I/O Pins: Four Inputs, Four Outputs

Comprehensive Loss-of-Signal (LOS) Detection System

Flexible, Two-Level Password Scheme Provides Three Levels of Security

120 Bytes of Password-1 Protected Memory

128 Bytes of Password-2 Protected Memory in Main Device Address

256 Additional Bytes Located at A0h Slave Address

Receiver 1 is Accessed at A2h Slave Address

Receiver 2 is Accessed at B2h Slave Address

I²C-Compatible Interface

+2.85V to +3.9V Operating Voltage Range

-40°C to +95°C Operating Temperature Range

28-Pin TQFN (5mm x 5mm x 0.75mm) Package