Intel® Cyclone® 10 LP Core Fabric and General Purpose I/Os Handbook

ID 683777
Date 9/26/2022
Public
Document Table of Contents

5.8.2.4. LVPECL I/O Standard in Intel® Cyclone® 10 LP Devices

The LVPECL I/O standard is a differential interface standard that requires a 2.5 V VCCIO. This standard is used in video graphics, telecommunications, data communications, and clock distribution applications.

Intel® Cyclone® 10 LP devices support the LVPECL input standard at the dedicated clock input pins only. The LVPECL receiver requires an external 100 Ω termination resistor between the two signals at the input buffer.

LVPECL requires AC coupling when the common mode voltage of the output buffer is higher than the LVPECL input common mode voltage on the Intel® Cyclone® 10 LP device.

In the following figures, the 50 Ω resistors at the receiver are external to the device.

Figure 78. LVPECL AC-Coupled TerminationThe LVPECL AC-coupled termination is applicable only when you use an Intel FPGA transmitter.


DC-coupled LVPECL is supported if the LVPECL output common mode voltage is in the LVPECL input buffer specification of the Intel® Cyclone® 10 LP devices.

Figure 79. LVPECL DC-Coupled TerminationThe LVPECL DC-coupled termination is applicable only when you use an Intel FPGA transmitter.


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