800G OSFP DR8 500m Optical Transceiver Overview

800G OSFP DR8 500m Optical Transceiver Overview 

**General Description:**  

The 800G OSFP DR8 is an advanced optical module designed for 500m optical communication. This OSFP (Octal Small Form-factor Pluggable) module efficiently manages data by converting 8 channels of 100Gb/s (PAM4) electrical input into 8 corresponding optical channels, each delivering 100Gb/s, totaling an impressive 800Gb/s. In the opposite direction, it processes parallel optical signals into electrical output with the same data rate and channel configuration.

You can easily connect this module using an optical fiber cable featuring an APC/MPO-16 connector. Thanks to the guide pins inside, the cable aligns perfectly inside the OSFP DR8 receptacle. However, remember not to twist the cable to maintain accurate channel alignment. Its electrical connectivity complies with the OSFP MSA edge connector standards.

Built as per the OSFP Multi-Source Agreement (MSA) guidelines, this product is robust, handling even challenging environmental conditions like temperature fluctuations, high humidity, and EMI interference with ease.

**Functional Description:**  

Each of the module's 8 parallel channels operates at a 1310nm center wavelength, with a speed of 100G per channel. The transmitter side houses a quad channel EML driver within the DSP, partnered with 8 parallel EMLs. As for the receiver side, a PD array is linked with two quad channel TIAs, transforming the 800Gb/s optical input into 8 channels of 100Gb/s (PAM4) electrical signals. A DSP-based gearbox facilitates the conversion of 50GBaud PAM4 signals, and it also integrates an 8-channel retimer and FEC block. This module's interfaces are consistent with IEEE 802.3ck, OSFP MSA, and the MPO-16 connector standard.

Powering this module requires only a single +3.3V power supply. Based on MSA guidelines, it features 4 control pins for efficient operation:

- **SCL and SDA:** A 2-wire serial interface between the host and the module, operating through the I2C protocol. Both signals need pull-up resistors to +3.3V on the host side, ranging between 2.2k ohms to 4.7k ohms.

- **INT/RSTn:** A dual-purpose signal. It allows the module to send an interrupt or lets the host reset the module. Figure 1 offers a detailed look into its 3 voltage zones that determine Reset and Interrupt states.

- **LPWn/PRSn:** Another dual-purpose signal. This lets the host indicate Low Power mode or allows the module to confirm its presence. Again, for a comprehensive understanding of its 3 voltage zones, refer to Figure 1.

Features

• OSFP MSA Compliant

• CMIS 4.0 Fully compliant

• Parallel 8 Optical Lanes

• 100G Lambda MSA 100G-FR Specification compliant

• Up to 500m transmission on single mode  fiber (SMF) with FEC

• Operating case temperature: 0 to 70C 

• Electrical interface: compliant with 800GAUI-8 (8x106.25Gb/s) interface defined in IEEE 802.3ck

• Rate Date operation at 106.25Gbps  (PAM4) per channel

• Maximum power consumption 16W