DS1886T+

Specialized Overview

The DS1886T+ is a specialized interface controller designed for SFF, SFP, and SFP+ optical modules, specifically supporting GPON/EPON and 10G PON ONU applications. It manages all control and monitoring functions compliant with the SFF-8472 standard. The device operates on a single 3.3V power supply with a typical operating current of 700µA. It features a 13-bit ADC for monitoring VCC, temperature, laser bias, modulation, and receive power, alongside a 9-bit DAC for APD bias control. The component utilizes a TQFN-24 package and supports an operating temperature range from -40°C to +95°C.

Specialized Feature Summary

• Serves as a companion controller for MAX3710 laser drivers and MAX3945 limiting amplifiers to support continuous mode and PON applications up to 2.5GHz.
• Includes a temperature lookup table (LUT) system to compensate for APC tracking errors and manage dual closed-loop variables.
• Provides three distinct laser control modes: Dual Closed Loop, APC Loop, and Open Loop, allowing flexible configuration based on application requirements.
• Integrates comprehensive fault measurement systems with maskable alarms and warnings for all monitored channels.

Specialized Applications

• GPON and EPON ONU modules
• 10G PON ONU modules
• SFF, SFP, and SFP+ optical transceiver modules

Specialized Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for End-of-Life notifications prior to integration. Ensure the specific ordering suffix matches the required packaging format. Validate that the revision level aligns with design specifications. Request official datasheets and test reports to confirm electrical characteristics.

Specialized Selection Notes

Select this controller when designing SFP or SFP+ modules requiring full SFF-8472 compliance for PON applications. It is suitable for designs utilizing MAXIM integrated laser drivers. Consider the TQFN-24 package constraints for PCB layout. Evaluate the need for digital LDD interfaces and internal calibration capabilities. Assess thermal management requirements within the specified operating temperature range.

Specialized Part Context

The DS1886T+ belongs to the Maxim Integrated family of specialized interface controllers. It is part of the DS1886 series, which focuses on optical module management. This component complements other Maxim devices like the MAX3710 and MAX3945 to form complete transmitter and receiver solutions for high-speed optical communications.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing host controllers if considering alternative vendors. Check pinout and register map similarities before attempting any cross-referencing.