The AFBR-1153 transmitter and AFBR-2153 receiver are housed in a 7-pin transfer-molded low-cost package that can be assembled into a MOST® technology-compliant plastic optical fiber connector receptacle. This application note will cover the handling, storage, operation and handling procedures of the fiber optic transmitter and receiver of the MOST150.


The AFBR-1153 transmitter and AFBR-2153 receiver devices are packaged in anti-static tubes, which are placed in a moisture barrier to protect the interior of the device from moisture.

Floor life and maximum storage time

Moisture sensitivity is classified as MSL2a according to JEDEC J-STD-020D. Devices in unopened moisture-proof bags can be stored for 12 months in an environment with a temperature between 5°C and 50°C and a relative humidity (RH) not exceeding 90%. Unpackaged devices can be stored in a production environment for up to 4 weeks if the temperature does not exceed 30°C and the relative humidity (RH) does not exceed 60%. For higher temperatures in a production environment, floor life will be shortened. (see Figure 2)


After the device is removed from the moisture barrier bag and inserted into the MOST system and soldered (up to 4 weeks), the moisture content in the mold material is low enough to ensure minimal mechanical stress during soldering.

As mentioned in the previous paragraph, it is recommended to bake the device prior to soldering if it will be left on the production site for more than four weeks.

Baking is done by removing the devices from the tubes and placing them in shallow containers so that the packages do not touch each other. The device was then placed in an oven and the device was heated to 100°C for 24 hours. After this process, the moisture content of the device is lower, and the stress caused by moisture during the soldering process is reduced.

As a general guideline, it is recommended to bake before each attempt at soldering. The baking process can be carried out as needed.

Electrostatic Discharge (ESD) Protection

This device is sensitive to electrostatic discharge, so care must be taken when handling it within an ESD protected area, which is marked with the symbol shown in Figure 3.

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