●Description of Change
■Silicon Labs announces an End of Life (EOL) and Last Time Buy (LTB) for WT41U Modules.
■Existing customers may place LTB orders per the key dates above and guidelines listed in this EOL form.
■All customer orders with a Customer Requested Delivery Date (CRD) between the Last Time Buy (Order) Date and the EOL Effective Date will be Non-Cancellable and Non-Returnable (NCNR). As of this EOL Date, Silicon Labs will no longer accept customer orders with a CRD beyond the EOL Effective Date.
■If you have questions about this EOL, please contact your Silicon Labs sales representative. A list of Silicon Labs sales representatives is available at www.silabs.com.
●Reason for Change
■Withdrawn BT2.1 specification by Bluetooth Special Interest Group (SIG).
■Note: Silicon Labs will accept customer orders that are received prior to the Last Order Date shown above, but does not guarantee that it will be able to fill all or part of any orders due to limited availability, manufacturing issues or other reasons beyond Silicon Labs’ reasonable control. Estimated delivery dates beyond normal lead time should not be considered as a firm acceptance or a guarantee of supply at any time.
■Module markings will not be updated to include the United Kingdom Conformity Assessed (UKCA) marking requirement. Customer orders with Sold to Party in the United Kingdom and a CRD beyond 31 December 2022 will not be accepted.
●Impact on Form, Fit, Function, Quality, Reliability
■No impact on form, fit, function or reliability. Quality is impacted as described in the Change Reason section.

Brand of Product：	Silicon Labs
Part#：	WT41U-A-AI4 、 WT41U-A-AI4C 、 WT41U-A-AI5 、 WT41U-A-AI5C 、 WT41U-A-AI55 、 WT41U-A-AI55C 、 WT41U-A-AI56 、 WT41U-A-AI56C 、 WT41U-A-AI56IAP 、 WT41U-A-AI56IAPC 、 WT41U-A-AI5001 、 WT41U-A-AI5001C 、 WT41U-A-HCI21001 、 WT41U-A-HCI21001C 、 WT41U-E-AI4 、 WT41U-E-AI4C 、 WT41U-E-AI5 、 WT41U-E-AI5C 、 WT41U-E-AI55 、 BT122-A-V2R 、 BT122-A-V2 、 WT41U-E-AI55C 、 WT41U-E-AI56 、 WT41U-E-AI56C 、 WT41U-E-AI56IAP 、 WT41U-E-AI56IAPC 、 WT41U-E-HCI21001 、 WT41U-E-HCI21001C 、 WT41U-N-AI4 、 WT41U-N-AI4C 、 WT41U-N-AI55 、 WT41U-N-AI55C 、 WT41U-N-AI56 、 WT41U-N-AI56C 、 WT41U-N-AI56IAP 、 WT41U-N-AI56IAPC 、 WT41U-N-HCI21001 、 WT41U-N-HCI21001C 、 WT41U More Part#
Product Category：	Modules More
Application：	More
Data Type：	PCN/EOL More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	Mar 08, 2022
Version Number：
Data Encoding：	2022-03-08-1207;2203081207
Data Size：	855 KB