TJA1101/TJA1101B: Robust, Low Power 100BASE-T1 PHY Transceiver

Roll over image to zoom in

Block Diagram

TJA1101B Block Diagram

TJA1101B Block Diagram


Automotive Qualified

  • AEC-Q100 Grade 1
  • Ambient Temperature -40°C to 125°C

IEEE 100BASE-T1 Compliant PHY Transceiver

  • Interoperable with any IEEE 100BASE-T1 and OABR compliant PHY
  • 100Mbps Ethernet over single unshielded twisted pair (UTP) cable
  • ESD robust MDI:
    • Passes IEC62228-5 Class IV
    • Protected against +/- 8kV according to IEC61000-4-2

OPEN Alliance TC-10 Compliant Sleep / Wake Up

  • Sleep and wake-up forwarding over data line
  • For reduced cable cost and weight
  • With direct connection to Vbat for simplified power management


  • Safety manual available to support system level safety goals

Optimized for Automotive Use Cases

  • MDI pins do not need an external filter or ESD protection
  • Cable polarity detection and auto-correction
  • Supports single 3.3V supply
  • Direct connection to Vbat

Advanced Diagnostic Features

  • Real-time Signal Quality Indicator
  • Gap Free Under Voltage Detection
  • Diagnosis of Cabling Errors

HVQFN36 (6mm x 6mm) with Wettable Flanks

  • Small PCB footprint enabled for AOI

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The TJA1101 is included in the 15-year program.

SafeAssure Functional Safety Program

SafeAssure Functional Safety Program

SafeAssure Functional Safety Program

When it comes to functional safety, NXP stands for quality and reliability. Our SafeAssure program simplifies system-level safety requirements in accordance with ISO 26262.
Read more

Design Resources


Quick reference to our documentation types.

3 documents

Design Files


1-5 of 8 hardware offerings

Show All


2 software files

Note: For better experience, software downloads are recommended on desktop.

Engineering Services

2 engineering services

To find a complete list of our partners that support this product, please see our Partner Marketplace.


3 trainings


What do you need help with?