With the recent launch of the USB Type-C Spec R2.4 standard, USB-IF not only enriches the scope of product certification, but also further optimizes the test methodology to meet the growing connectivity needs and technical challenges. The following is a detailed interpretation of the standard:
1. Power-Only Receptacle(14Pin)
The USB Type-C Spec R2.4 standard introduces the requirement for the certification of recharge-only outlets, which is a simplified version of the USB full-featured Type-C socket, and the interface dimensions should meet the requirements of Figure 3.1 in the standard.
The specific requirements are as follows:
a. 14 contacts (i.e. A1, A4, A5, A6, A7, A9, A12, B1, B4, B5, B6, B7, B9 and B12) must be included: CC, D+/D-, VBUS and GND must be included;
b. The physical presence of SBU contacts (i.e., A8 and B8) is optional;
c. TX and RX (i.e. A2, A3, A10, A11, B2, B3, B10 and B11) contacts are not allowed;
d. D+ and D- contacts (i.e. A6, A7, B6 and B7) should be shorted inside the socket and not connected to the circuit board;
e. The previously highlighted electromagnetic compatibility (EMC) provisions are optional for sockets that only support charging (e.g., grounding points or EMC gaskets on the housing);
f. Charging-only sockets should be designed to meet the maximum power requirements specified in USB PD and USB 2.0;
g. The socket can be used for power or powered devices, but when used for powered devices, the implementation of USB BC 1.2 is not supported.
2. Added Right-Angle Plug certification requirements
For the first time, the USB Type-C Spec R2.4 standard includes the Right-Angle Plug as a certification. Previously, customers had many questions about the certification of right-angle plugs, and the ambiguity in the test was often controversial. This standard update provides comprehensive clarification on such issues, ensures the accuracy and impartiality of the test, and provides clear guidance and support to customers.
3. Contact Current Rating test method optimization
In the USB Type-C Spec R2.4 standard, the test method for contact current ratings has also been optimized. Specifically, the rated current applied to the VCONN (B5) contacts has been revised from a minimum of 1.25 A to a minimum of 0.5 A, with the remaining requirements remaining unchanged. This adjustment will ensure that the testing process is more relevant to the user's real-world application scenario.
4. Insertion loss (IL) test upgrade for USB4 Gen3 & Gen4 cable assemblies
The USB Type-C Spec R2.4 standard adds a 12.8GHz test frequency to the insertion loss test of USB4 Gen3 & Gen4 cable assemblies.
As an industry-leading testing and certification organization, Thiel Terminal Laboratory closely follows the relevant technology development and certification requirements in the USB field, and is committed to providing customers with one-stop testing and certification services. We continue to optimize the testing process and methods, and strive to help customers obtain certification in the shortest period with more efficient and professional services, and help customers stand out in the fierce market competition.
Please pay close attention to the update content of the USB Type-C Spec R2.4 standard, and apply for product upgrades and certifications according to your own needs. We look forward to working with you to promote the innovation and development of USB connection technology.
Contact:
Wang Yang 18718522069
wangyang10@caict.ac.cn