W5500 Chip Freezing Test

The W5500 chip was tested in a typical freezer, checking for normal operation in an environment where it dropped below minus 20 degrees Celsius.   The normal operating category of the chip listed on the WIZnet website is minus 40 to +85.

• Check chip operation at temperatures falling below -20℃.?

• Review normal operation during W5500 Wake-up in freezing state for a long time.?
• Measure the speed drop after aging at -20℃?for a long time.?

 

Purpose?

1. Check that there is no speed deviation when the W5500 chip is operated at room temperature and when it is operated at a low temperature below -20.
2. When the W5500 is wake-up in the freezer for a long time, examine its normal operation.
3. Measure the operation and speed drop when aging at a temperature below -20 degrees for a long time.

 

Conducting the test at normal room temperature between 15 and 25 degrees Celsius.

Chip?Surface?Temperature :?42.9℃?

W5500?TCP?Recv?:?0.042Mbps (42Kbps)?

 

Test carried out below minus 20 degrees.

(Left) - Freezer?Inside?Temperature?:?-20.2℃?

(Right) - Chip?Surface?Temperature :?-8.4℃?

W5500?TCP?Recv?:?0.042Mbps (42Kbps)?

 

Operation When Wake-Up W5500 in freezer for a long time.

 

(Left)?-?Freezing?Chip?Surface?Temperature?in?Operation?:?-6.2℃?

(Right)?-?Freezing?Chip?Surface?Temperature?without?Movement?:?-19.4℃?

W5500?TCP?Recv?:?0.046Mbps (46Kbps)?

 

Operation and speed degradation when aging at a temperature below -20 degrees for a long time

1st Test (1 hour Later)

(Left) - Freezer?Inside?Temperature?:?-23.1℃?

(Right) - Chip?Surface?Temperature :?-7.0℃?

W5500?TCP?Recv?:?0.042Mbps (42Kbps)?

  2nd Test (3 hour Later)  

(Left) - Freezer?Inside?Temperature?:?-20.2℃?

(Right) - Chip?Surface?Temperature :?-8.4℃?

W5500?TCP?Recv?:?0.042Mbps (42Kbps)?

  3rd Test (5 hour Later)

(Left) - Freezer?Inside?Temperature?:?-26.4℃?

(Right) - Chip?Surface?Temperature :?-10.9℃?

W5500?TCP?Recv?:?0.042Mbps (42Kbps)?