7 Detailed Description

7.1 Overview

The ESD2CANFD24 is a dual-channel ESD TVS diode in SOT-23 leaded package which is convenient for

automatic optical inspection. This product offers IEC 61000-4-2 ±25-kV air-gap, ±25-kV contact ESD protection,

and has a clamp circuit with a back-to-back TVS diode for bidirectional signal support. The 2.5 pF (typical)

or less line capacitance of this ESD protection diode is suitable for CAN, CANFD, CAN SiC, and CAN-XL

applications that can support data rates up to 10 Mbps. A typical application for this product is ESD circuit

protection for CAN transceivers.

7.2 Functional Block Diagram

2

1

3

7.3 Feature Description

The ESD2CANFD24 is a bidirectional TVS with a high ESD protection level. This device protects the circuit from

ESD strikes up to ±25-kV contact and ±25-kV air-gap specified in the IEC 61000-4-2 standard. The device can

also handle up to 3.5 A surge current (IEC 61000-4-5 8/20 µs). The I/O capacitance of 2.5-pF (typical) supports

a data rate up to 10 Mbps. This clamping device has a small dynamic resistance, which makes the clamping

voltage low when the device is actively protecting other circuits. For example, the clamping voltage is only 37

V when the device is taking 3.5 A transient surge current. The breakdown is bidirectional so this protection

device is a good fit for CAN which is a differential signal. Low leakage allows the diode to conserve power when

working below the VRWM. The temperature range of −55°C to +150°C makes this ESD device work at extensive

temperatures in most environments. The leaded SOT-23 package is good for applications requiring automatic

optical inspection (AOI).

7.3.1 Temperature Range

This device is qualified to operate from –55°C to +150°C.

7.3.2 IEC 61000-4-2 ESD Protection

The I/O pins can withstand ESD events of at least ±25-kV contact and ±25-kV air-gap in the leaded SOT-23

package according to the IEC 61000-4-2 standard. An ESD-surge clamp diverts the current to ground.

7.3.3 IEC 61000-4-5 Surge Protection

The IO pins can withstand surge events up to 3.5 A (8/20 µs waveform). An ESD-surge clamp diverts this

current to ground.

7.3.4 IO Capacitance

The capacitance between the I/O pins is 2.5 pF (typical) or less. This capacitance supports data rates for CAN,

CANFD, CAN SiC, and CAN-XL up to 10 Mbps.

7.3.5 Dynamic Resistance

The IO pins feature an ESD clamp that has a low RDYN of 0.45 Ω (Pin 1 or Pin 2 to Pin 3) and 0.45 Ω (Pin 3 to

Pin 1 or Pin 2) or less which prevents system damage during ESD events.

ESD2CANFD24

SLVSH12 – NOVEMBER 2022

www.ti.com

8

Submit Document Feedback

Copyright © 2022 Texas Instruments Incorporated

Product Folder Links: ESD2CANFD24