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DS1874 - SFP+ Controller

Description

The DS1874 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality.

The combination of the DS1874 with the MAX3798/MAX3799 laser driver/limiting amplifier provides APC loop, modulation current control, and eye safety functionality.

Features

  • Meets All SFF-8472 Control and Monitoring Requirements.
  • Laser Bias Controlled by APC Loop and Temperature LUT to Compensate 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 Dynamic Range Internal Direct-to-Digital Temperature Sensor Alarm and Warning Flags for All Monitored Channels.
  • Two 9-Bit Delta-.

📥 Download Datasheet

Datasheet preview – DS1874

Datasheet Details

Part number DS1874
Manufacturer Maxim Integrated Products
File Size 1.27 MB
Description SFP+ Controller
Datasheet download datasheet DS1874 Datasheet
Additional preview pages of the DS1874 datasheet.

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Full PDF Text Transcription

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19-4691; Rev 0; 6/09 www.DataSheet4U.com SFP+ Controller with Digital LDD Interface General Description The DS1874 controls and monitors all functions for SFF, SFP, and SFP+ modules including all SFF-8472 functionality. The combination 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 eye safety requirements are met without adding external components. Six ADC channels monitor VCC, temperature, and four external monitor inputs (MON1–MON4) that can be used to meet all monitoring requirements. MON3 is differential with support for common mode to VCC.
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