ISL32455EIBZ-T

Introduction

The ISL32455EIBZ-T is an advanced ESD protection device from Intersil which provides protection from fast transient voltage spikes. It is a multiple-mode device which includes both an ESD and a low-capacitance bus protector that helps protect all types of I/O ports and data lines, including USB, LVDS, Ethernet, HDMI, and other protocols. This article will focus on the application fields and working principles of ISL32455EIBZ-T.

Application field of ISL32455EIBZ-T

ISL32455EIBZ-T is a dual-channel ESD protection device designed for use in high speed I/O interfaces. It offers a wide range of ESD and transient protection on both input and output pins. The device features an ESD tolerance of up to ±30V without fail, and is designed to protect against contact and air discharge events. It is designed for use in a wide range of applications, including consumer electronics, automotive infotainment systems, industrial control systems, and more.

The device can be used in a wide range of interfaces including High Speed HDMI, Low Voltage Differential Signaling (LVDS), Serial ATA (SATA), and Universal Serial Bus (USB) 2.0 and 3.0 ports. The built-in differential pair protection offers superior data line protection from both ESD and transient voltage spikes, reducing the interference on the data lines. The differential pair protection eliminates any false triggering when coupled with the device’s built-in line termination circuitry.

The device supports both coaxial and twisted pair cables, so that it can be used for both shielded and unshielded cables. It is also capable of providing over-voltage protection from DC power line transients. Furthermore, the device features an adjustable clamp voltage, making it useful for applications requiring an adjustable protection level.

Working Principle of ISL32455EIBZ-T

The ISL32455EIBZ-T device is capable of providing ESD and transient protection up to ±30V. It works by clamping the voltage of any transient spikes above the specified voltage to a safe level. The device integrates low capacitance varistors that act as clamps, limiting the maximum voltage across the component to a safe level. These varistors are also designed to reduce false signals that can be caused by static electricity.

To ensure a high level of protection, the ISL32455EIBZ-T is designed with a high ESD dv/dt ratio. This ratio is calculated as the difference between the nominal threshold voltage and the voltage at which the component begins to conduct current divided by the maximum current the component can carry. This ensures the component has a high tolerance for ESD events without false triggering.

The device also features differential pair protection, which provides superior data line protection from both ESD and transient voltage spikes. This protection eliminates any false effects by coupling the device’s built-in line termination circuitry to the differential pair’s input. The device also includes an over-voltage protection feature, which prevents transients on the power line from disrupting the operation of the device. This built-in protection feature ensures a high level of protection.

Conclusion

The ISL32455EIBZ-T is an advanced ESD protection device which provides a high level of ESD and transient protection. It is designed for use in a wide range of applications, including consumer electronics, automotive infotainment systems, industrial control systems, and more. The device features an adjustable clamp voltage, low capacitance varistors, differential pair protection, and over-voltage protection. All of these features contribute to the devices superior ESD and transient protection performance.