XC7Z020-1CLG400CES Replacement: XC7Z020-1CLG400I or XC7Z020-1CLG400C?

ElecSuppliers Part Number GuideAug 18, 2026

The XC7Z020-1CLG400CES is a specific Zynq-7000 SoC part number that has appeared in distributor inventories for years. Current distributor data identifies this exact part as obsolete, with XC7Z020-1CLG400I listed as a direct substitute and XC7Z020-1CLG400C listed as a parameter-equivalent option.

That makes the replacement question more useful than a generic XC7Z020 comparison.

What Is the Difference?

The three part numbers are closely related:

All three use the same XC7Z020 device and CLG400 package.

The important change is the suffix.

The C version is specified for commercial temperature operation, while the I version is the industrial-temperature option. Distributor data lists XC7Z020-1CLG400I for -40°C to 100°C junction temperature, while XC7Z020-1CLG400C is listed for 0°C to 85°C.

Why XC7Z020-1CLG400I Is the More Direct Replacement

If the original component is XC7Z020-1CLG400CES, the most straightforward replacement is XC7Z020-1CLG400I.

DigiKey specifically identifies XC7Z020-1CLG400I as a direct substitute for the obsolete CES part.

This is useful for existing designs because the replacement keeps the same basic device and CLG400 package while moving to the industrial temperature grade.

What Does the CES Suffix Mean for Replacement Searches?

The CES suffix should not be ignored when sourcing an old Zynq part.

A search for only XC7Z020 can return several package and temperature variants.

For example, current distributor listings include XC7Z020-1CLG400C, XC7Z020-1CLG400I, and other XC7Z020 package variants.

For an existing PCB, searching by the complete original part number is much safer.

Can XC7Z020-1CLG400C Replace XC7Z020-1CLG400CES?

It can be considered because both are commercial-temperature CLG400 versions of XC7Z020.

DigiKey lists XC7Z020-1CLG400C as a parameter-equivalent substitute for the obsolete CES part.

However, the exact replacement decision should follow the temperature requirements of the product.

If the equipment needs industrial-temperature operation, the I version is the more appropriate candidate.

Package Compatibility

The three part numbers use the CLG400 package.

This is important because changing to another XC7Z020 package can create a PCB compatibility problem.

For example, the XC7Z020 family also includes 484-ball package variants. Mouser lists XC7Z020-1CLG400C alongside XC7Z020-1CLG484C, showing that the same device is available in different physical packages.

Therefore, replacing an XC7Z020 part should not stop at the XC7Z020 device name.

The complete package code needs to match the board.

XC7Z020-1CLG400CES Replacement Checklist

For an existing design, the key points are straightforward:

Original: XC7Z020-1CLG400CES

Direct replacement candidate: XC7Z020-1CLG400I

Parameter-equivalent candidate: XC7Z020-1CLG400C

Package: CLG400

Device: XC7Z020

Speed grade: -1

The remaining question is whether the application's temperature requirements match the selected suffix.

Which Part Should You Use?

For a direct replacement search, XC7Z020-1CLG400I is the strongest starting point because DigiKey explicitly identifies it as the direct substitute for XC7Z020-1CLG400CES.

XC7Z020-1CLG400C is another relevant option when commercial-temperature operation is acceptable.

The important lesson is that an FPGA replacement should be searched by the complete part number, not just the base device.

With Zynq-7000 parts, the package and temperature suffix can change the suitability of an otherwise very similar-looking component.