DS1877T+T&R

Sensor And Detector Interfaces Overview

The DS1877T+T&R is a standalone SFP controller designed for dual-receiver optical transceiver modules. It operates within a voltage range of +2.85V to +3.9V and supports an operating temperature range from -40°C to +95°C. The device integrates four analog monitor channels, including an internal direct-to-digital temperature sensor, VCC monitoring, and two differential external monitor inputs (RSSI1/RSSI2). It features two 10-bit delta-sigma DAC outputs controlled by temperature-indexed lookup tables. Communication is handled via an I2C-compatible interface with specific slave addresses for the main device (A0h), Receiver 1 (A2h), and Receiver 2 (B2h). The component is housed in a 28-pin TQFN package.

Sensor And Detector Interfaces Feature Summary

• Meets all SFF-8472 control and monitoring requirements for SFF, SFP, and SFP+ modules.
• Provides comprehensive loss-of-signal detection for two receivers with scalable dynamic range inputs.
• Includes flexible security through a two-level password scheme protecting nonvolatile memory.
• Supports enhanced RSSI monitoring with dual-range functionality for improved accuracy.

Sensor And Detector Interfaces Applications

• SFF, SFP, and SFP+ Transceiver Modules
• Dual Rx Video SFPs

Sensor And Detector Interfaces Procurement Notes

Verify the exact ordering suffix against official documentation to confirm packaging specifications. The 'T&R' designation indicates tape and reel packaging. Ensure compatibility with RoHS compliance standards as indicated by the '+' suffix. Cross-reference the manufacturer's current product status to confirm availability and lifecycle stage before finalizing procurement plans.

Sensor And Detector Interfaces Selection Notes

Select this component for designs requiring independent monitoring of two receiver channels within a single SFP form factor. Verify that the system requires the specific I2C addressing scheme where Receiver 1 and Receiver 2 are accessed at distinct slave addresses. Confirm that the available digital I/O pins and DAC outputs align with the module's control logic requirements.

Sensor And Detector Interfaces Part Context

The DS1877 belongs to Maxim Integrated's portfolio of sensor interface controllers specifically engineered for optical networking applications. It serves as a dedicated management IC for small form-factor pluggable transceivers, replacing discrete monitoring solutions. The device consolidates ADC, DAC, and EEPROM functions into a single integrated circuit to reduce board space and complexity.

Sensor And Detector Interfaces Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's obsolescence notifications or cross-reference tools for potential end-of-life alternatives if sourcing becomes restricted.