OPEN Alliance Ethernet ESD protection

Pioneering in automotive Ethernet OPEN Alliance compliant ESD protection

To take the next step in automotive connectivity and electrification we need high-speed, high-bandwidth Automotive Ethernet. Industry leaders collaborate within the OPEN Alliance Special Interest Group (SIG) to encourage Ethernet adoption in cars. However, with advanced electrical designs, discrete ESD protection becomes more critical than ever. Nexperia is first in offering fully compliant 100/1000BASE-T1 OPEN Alliance Ethernet ESD protection.

Key features and benefits of the first two OPEN Alliance Ethernet compliant ESD Protection devices

PESD2ETH100-T For 100BASE-T1 Ethernet PESD2ETH1G-T For 100/1000BASE-T1 Ethernet
  • Fully 100BASE-T1 OPEN Alliance compliant
  • Low capacitance < 3 pF
  • ESD protection up to 30 kV (IEC 61000-4-2, contact)
  • 1000 contact discharges with 30 kV (IEC 61000-4-2)
  • High trigger voltage: Vt1 = 100 V min.
  • SOT23 package
  • AEC-Q101 qualified / automotive grade
  • Fully 100/1000BASE-T1 OPEN Alliance compliant
  • Low capacitance < 2 pF
  • ESD protection up to 30 kV (IEC 61000-4-2, contact)
  • 1000 contact discharges with 15 kV (IEC 61000-4-2)
  • High trigger voltage: Vt1 = 100 V min.
  • SOT23 package
  • AEC-Q101 qualified / automotive grade

Target applications

  • ESD protection for in-vehicle network lines in automotive environments
  • OPEN Alliance 100BASE-T1 Ethernet and 1000BASE-T1 Ethernet
  • Low-Voltage Differential Signaling (LVDS) automotive

Rethinking ESD Protection Requirements

The OPEN Alliance (One-Pair Ether-Net) Special Interest Group (SIG) is a non-profit alliance of mainly automotive industry and technology providers. One key goal is to enable the deployment of the existing IEEE 100BASE-T1 and 1000BASE-T1 physical layer specifications with complementing specifications for conformance and interoperability.

Discrete ESD protection devices take a crucial role when it comes to system level robustness and new requirements needs to be considered. When there is either no ESD protection or it is located at the PHY, then the power of ESD strikes would pass the CM termination, DC Block and CMC. If however the ESD protection device is placed right at the connector (see Figure below) it not only protects the PHY but also the common-mode choke (CMC) and passives.



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Arrangement of ESD suppression device within the 100BASE-T1 MDI interface, OPEN Alliance SIG (2019)

Blog article - OPEN Alliance: Get the right ESD protection placement



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Read the blog article here.

Products

Type number Description Status Quick access
PESD2ETH100-T ESD protection for In-vehicle networks Production
PESD2ETH1G-T ESD protection for In-vehicle networks Production

Documentation

File name Title Type Date
Nexperia_document_brochure_ESD_automotive_application_guide_201708 Application guide ESD protection automotive Brochure 2017-11-16
Nexperia_document_book_ESDApplicationHandbook_2018 ESD Application Handbook - Protection concepts, testing and simulation for modern interfaces User manual 2018-08-29
PESD2ETH100-T ESD protection for In-vehicle networks Data sheet 2019-12-13
Nexperia_Automotive_Ethernet_leaflet_ESD_Protection_Factsheet Automotive Ethernet ESD Protection - Nexperia offers the first true OPEN Alliance compliant ESD Protection Leaflet 2019-12-19
Nexperia_Whitepaper_ESD_Discharge_Current_Measurement_Using_SEED_1 Efficient prediction of ESD discharge current according to OPEN Alliance 100BASE-T1 specification using SEED White paper 2019-12-19
RS2958_SOT23_Top_new-style SOT23_Top_new-style.png Marcom graphics 2020-01-29
PESD2ETH1G-T ESD protection for In-vehicle networks Data sheet 2020-02-07
Nexperia_Automotive_Ethernet_ESD_Protection_Factsheet_CN 汽车以太网ESD保护 Leaflet 2020-02-12

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Datasheets (2)

File name Title Type Date
PESD2ETH100-T ESD protection for In-vehicle networks Data sheet 2019-12-13
PESD2ETH1G-T ESD protection for In-vehicle networks Data sheet 2020-02-07