DS1876

NOT RECOMMENDED FOR NEW DESIGNS

SFP Controller with Dual LDD Interface

Industry's First Dual Tx Controller for Video SFP Modules

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Meets All SFF-8472 Transmitter Control and Monitoring Requirements
  • Six Analog Monitor Channels: Temperature, VCC, PMON1, BMON1, PMON2, BMON2
    • PMON_ and BMON_ Support Internal and External Calibration
    • Scalable Dynamic Range
    • Internal Direct-to-Digital Temperature Sensor
    • Alarm and Warning Flags for All Monitored Channels
  • Six Quick Trips for Fast Monitoring of Critical Functions for Laser Safety
  • Four 10-Bit Delta-Sigma Outputs
    • Each Controlled by 72-Entry Temperature Lookup Table (LUT)
  • Digital I/O Pins: Six Inputs, Five Outputs
  • Comprehensive 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
  • Transmitter 1 Is Accessed at A2h Slave Address
  • Transmitter 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 0.8mm) Package

The DS1876 controls and monitors all functions for dual transmitter modules. The memory map is based on SFF-8472. The DS1876 supports APC and modulation control and eye safety functionality for two laser drivers. It continually monitors for high output current, high bias current, and low and high transmit power to ensure that laser shutdown for eye safety requirements are met without adding external components. Six ADC channels monitor VCC, temperature, and four external monitor inputs that can be used to meet all monitoring requirements.

Applications

  • Dual Tx Video SFP Modules
DS1876
SFP Controller with Dual LDD Interface
DS1876: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

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Hardware Ecosystem

Parts Product Life Cycle Description
ADC/DAC Combo Converters 3
DS1874
LAST TIME BUY SFP+ Controller with Digital LDD Interface
DS1873
LAST TIME BUY SFP+ Controller with Analog LDD Interface
DS1877
NOT RECOMMENDED FOR NEW DESIGNS SFP Controller for Dual Rx Interface
Matched Resistors & Transistors 1
DS1842
NOT RECOMMENDED FOR NEW DESIGNS 76V, APD, Bias Output Stage with Current Monitoring
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