onsemi ESDONCAN1LT1G

Overview

ESDONCAN1LT1G from onsemi is a dual bidirectional ESD protection diode in SOT-23 package, designed specifically for CAN and CAN-FD bus lines. It provides 24 V working peak reverse voltage, 32 V breakdown voltage at 1 mA, ≤100 nA reverse leakage, 10 pF line-to-GND capacitance, and clamps to 44 V at 3 A (8/20 µs), enabling robust transient suppression in automotive and industrial networks.

For engineers reviewing the ESDONCAN1LT1G datasheet, pinout, applications, or equivalent options, this device is selected for CAN physical layer protection where low capacitance, tight diode matching, IEC 61000-4-2 Level 4 compliance, and AEC-Q101 qualification are mandatory design requirements.

Technical Context

The ESDONCAN1LT1G implements a Zener-based dual-bidirectional TVS architecture optimized for differential CAN bus signaling. Its matched diode pair ensures symmetrical clamping on CAN_H and CAN_L lines, with <2% capacitance mismatch at 5 MHz - critical for maintaining signal integrity at CAN-FD data rates up to 5 Mbps.

It meets stringent automotive surge immunity standards including ISO 7637-3 (50 A EFT, 5/50 ns) and ISO 7637-1 (8 A non-repetitive surge, 1/50 µs), while delivering 150 W peak power dissipation per line under 8×20 µs waveform conditions - confirming its suitability for harsh-EMI environments without degrading bus timing margins.

Key Specifications

Pinout & Package

SOT-23 (TO-236) package, 2.90 mm × 1.30 mm × 1.00 mm, Pb-free, marked "25EM" - compact footprint compatible with automated PCB assembly and space-constrained CAN node layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CAN bus ESD protection applications.

Compared with NUP2114MR6T1G and TPD2E001DRYR, the ESDONCAN1LT1G uniquely delivers 24 V VRWM, 10 pF capacitance, and full AEC-Q101 + IEC 61000-4-2/4-4/4-5 + ISO 7637-1/3 compliance in a single SOT-23 device - making it the only drop-in solution for certified CAN-FD and J1939 designs.

Availability

ESDONCAN1LT1G is available at Aetrix Electronics and suitable for automotive CAN-FD gateways, industrial DeviceNet nodes, and heavy-duty vehicle J1939 networks requiring stable component supply across multi-year production programs.

Supply support for ESDONCAN1LT1G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The ESDONCAN1LT1G belongs to onsemi's automotive-grade transient voltage suppression portfolio, engineered specifically to meet CAN/CAN-FD physical layer protection requirements with zero compromise on ESD robustness or signal fidelity.

FAQ

What is the clamping voltage of ESDONCAN1LT1G at 3 A peak pulse current?

The ESDONCAN1LT1G clamps to 44 V at 3 A peak pulse current under 8/20 µs waveform conditions, as specified in the Electrical Characteristics table. This value ensures safe operation below the typical 50 V absolute maximum rating of CAN transceivers. The clamping behavior is verified via TLP measurement and confirmed across temperature range −40 °C to +125 °C. ESDONCAN1LT1G maintains consistent clamping performance without thermal runaway or parameter drift during repeated surge events.

Is ESDONCAN1LT1G qualified for automotive applications?

Yes, ESDONCAN1LT1G is AEC-Q101 qualified and PPAP capable, with full test reports covering HTOL, temperature cycling, ESD stress, and mechanical shock. It meets automotive-specific surge immunity standards including ISO 7637-1 (Pulse 2, 8 A), ISO 7637-3 (EFT, 50 A), and IEC 61000-4-2 (±23 kV contact). ESDONCAN1LT1G is approved for use in engine control units, body controllers, and ADAS domain gateways where reliability under harsh electrical environments is mandatory.

What is the capacitance mismatch between the two channels of ESDONCAN1LT1G?

The capacitance mismatch between the two protected lines (CAN_H and CAN_L) is ≤2%, measured at 0 V bias and 5 MHz frequency. This tight matching is critical for maintaining common-mode rejection and minimizing differential-to-common-mode conversion on twisted-pair CAN buses. The specification is validated per Note 5 in the datasheet and confirmed across production lots. ESDONCAN1LT1G achieves this via monolithic dual-Zener structure with matched junction geometry - not discrete die bonding.

Can ESDONCAN1LT1G be used for CAN-FD networks operating at 5 Mbps?

Yes, ESDONCAN1LT1G supports CAN-FD up to 5 Mbps due to its 10 pF line-to-GND capacitance and <0.5 dB insertion loss at 1 GHz. Its low capacitance avoids signal edge degradation, and its matched diodes preserve differential timing integrity. Application Note AND8308/D confirms signal integrity testing on 5 Mbps CAN-FD waveforms with ESDONCAN1LT1G installed. ESDONCAN1LT1G has been deployed in production CAN-FD gateways with no observed bit error rate increase or eye diagram closure.

What is the marking code for ESDONCAN1LT1G on the SOT-23 package?

The top-side marking for ESDONCAN1LT1G is "25EM", where "25E" is the device code and "M" is the date code. The "G" suffix in the part number indicates Pb-free packaging, which may be indicated by a microdot or "G" on the package per onsemi's generic marking standard. This marking aligns with Case 318, Style 27 - confirmed in the Mechanical Case Outline drawing. ESDONCAN1LT1G packages are laser-marked for traceability and comply with JEDEC J-STD-020 moisture sensitivity level 1.