DS1878T+T

Sensor And Detector Interfaces Overview

The DS1878T+T is an SFP+ controller with a digital laser driver interface, designed to manage SFF, SFP, and SFP+ optical modules. It operates within a voltage range of +2.85V to +5.5V and supports temperatures from -40°C to +95°C. The device includes six ADC channels for monitoring VCC, temperature, and four external inputs (MON1–MON4), alongside two 9-bit delta-sigma DAC outputs. It features a 3-wire master interface for controlling Maxim laser drivers, five digital inputs, four digital outputs, and an I2C-compatible interface. The component is housed in a 28-pin TQFN package.

Sensor And Detector Interfaces Feature Summary

• Meets all SFF-8472 control and monitoring requirements
• Laser bias controlled by APC loop and temperature LUT
• Six analog monitor channels with alarm and warning flags
• Flexible two-level password scheme provides three levels of security

Sensor And Detector Interfaces Applications

• SFF Transceiver Modules
• SFP Transceiver Modules
• SFP+ Transceiver Modules

Sensor And Detector Interfaces Procurement Notes

Verify the exact ordering suffix against official manufacturer documentation before procurement. Confirm that the specific variant matches the required operating temperature range and package type. Ensure compatibility with existing system power supply voltages and communication interfaces. Check for any recent revisions or updates to the datasheet that may affect pin configurations or electrical characteristics.

Sensor And Detector Interfaces Selection Notes

Select this component when designing SFF, SFP, or SFP+ transceivers requiring integrated laser control and monitoring. Ensure the design accommodates the specified voltage and temperature ranges. Verify that the host system can support the I2C and 3-wire interfaces. Consider the need for eye safety shutdowns and the availability of external calibration for the analog monitor inputs.

Sensor And Detector Interfaces Part Context

The DS1878 series serves as a comprehensive controller for small form-factor pluggable optical transceivers. It integrates functions typically handled by multiple discrete components, simplifying the design of high-speed optical links. The device is part of Maxim Integrated's portfolio of laser driver and limiting amplifier solutions, providing a complete ecosystem for VCSEL, DFB, and EML-based applications.

Sensor And Detector Interfaces Replacement Considerations

Consult the official Analog Devices/Maxim Integrated replacement guide for verified substitute part numbers. Ensure any alternative component maintains compatibility with SFF-8472 standards and supports the required digital laser driver interface protocols.