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arulmaniv's avatar
arulmaniv
Icon for New Contributor rankNew Contributor
2 months ago

Cyclone V Clamping Diode Electrical Specification

Hi, Please provide the below information for the Cyclone V Device IO Banks signals. what is the clamping voltage for the internal diode when enabled. what is the normal protection voltage for IO ...
Configuration
Generic Io
quality|reliability
arulmaniv's avatar
arulmaniv
Icon for New Contributor rankNew Contributor
2 months ago

We are currently reviewing the protection mechanisms for the Cyclone V device and would appreciate your assistance in clarifying the following details regarding the internal clamping diode configuration:

  1. Clamping Voltage (when enabled):
    Could you please confirm the clamping voltage level for the internal diode when it is enabled on the IO pins?
  2. IO Pin Protection Voltage (when clamping diode is disabled):
    What is the typical protection voltage range for the IO pins when the internal clamping diode is not enabled?

This information is critical for ensuring compliance with our system-level ESD and surge protection requirements. We would appreciate any documentation or references you could share to support these specifications.

Thank you in advance for your support.

AqidAyman_Altera's avatar
AqidAyman_Altera
Icon for Regular Contributor rankRegular Contributor
2 months ago

Hi,

Please download the IBIS model for Cyclone V using the link below:

https://www.altera.com/design/devices/resources/models/ibis

Consulting the official Cyclone V IBIS files is a reliable method to understand the internal diode clamping voltage and IO pin protection at a detailed electrical level. For precise numerical values or simulation, use the IBIS files along with signal integrity simulation tools.

Thanks.