E-Marker IC

E-Marker IC

E-Marker ICs

The World’s First E-Marker Supplier to achieve USB-IF Certification for USB4™& Intel Certification for Thunderbolt™4. It supports USB-C® cables for dual-channel transmission and data rates of up to 40Gbps (Gigabits per second, or 1 billion bits per second). Moreover, EJ90x series support USB PD 3.0. It reports the length of the transmission line, the I/O interface at both ends of the transmission, the current and transmission data rate capabilities of a cable, thus supporting the desired performance for customers and end-users.


“USB Type-C will help simplify the lives of consumers by providing a single-cable for data rates up to 40Gbps with USB4™ and up to 100W of power via USB Power Delivery (USB PD),” said Jeff Ravencraft, USB-IF President & COO. “USB-IF member companies like Etron that develop USB PD E-Markers for cable products are vital to enabling a truly single cable solution.


The key to the USB4™ specification is using the existing USB-C cable for dual-channel transmission, which can achieve a data rate of up to 40Gbps. Thus, it can effectively share the available bandwidth of the bus. The USB cable facilitates the transmission of 4K HDR signals and massive file transfers, thus making significant progress in practicality and performance of USB hubs and USB-equipped computers, laptops, motherboards, etc.

  • USB power delivery specification R3.0 V2.0 compliant- Monitor Hard Reset, Soft Reset and Cable Reset signaling
  • USB Type-C Cable and Connector specification R2.0 compliant
  • Embedded 8K bytes MTP for cable parameter setting and programmable through CC wire
  • Embedded 12MHz crystal
  • Embedded VCONN diodes & Ra resistors
  • If grey-shaded in the table, indicates older generation products, NOT recommended for new designs
Product Name PD Specification OTP/MTP MCU Package Type Body Size Datasheet
EJ903 _EMC_PD 3.0 /USB4/Intel TBT 4 AVL PD3.0 MTP MCU 20-WLCSP 2mm x 1.6 mm Contact Us
EJ901_EMC_PD2.0 /Intel TBT3 AVL_WLCSP PD2.0 OTP NA 12-DFN 2.5mm x 2.5mm Contact Us