XC18V512PC20I

Overview

The XC18V512PC20I is a 3.3V in-system programmable configuration PROM from the Xilinx XC18V00 series, housed in a 20-pin PLCC package. It provides 512-kilobit storage capacity for Xilinx FPGA bitstreams. The device supports serial and parallel configuration modes, featuring IEEE 1149.1 JTAG boundary-scan compliance for programming and testing. It offers 20,000 program/erase cycle endurance and operates across commercial and industrial temperature ranges.

Feature Summary

• In-system programmable via standard 4-pin JTAG interface
• Supports dual configuration modes: serial and parallel
• Cascadable architecture using Chip Enable Output (CEO)
• Advanced data security features against unauthorized reading

Applications

• Configuration of Virtex, Virtex-E, and Virtex-II FPGAs
• Configuration of Spartan-II and Spartan-IIE FPGAs
• Storage of configuration bitstreams for low-density devices

Procurement Notes

Verify the package type matches the required PCB footprint, as the PC20 suffix denotes a 20-pin PLCC. Confirm voltage requirements align with the 3.3V VCCINT and VCCO specifications. Ensure design tools support the specific IDCODE associated with this density level for proper identification during in-system programming.

Selection Notes

Select this component when a non-volatile memory solution is needed for FPGA configuration without external microcontrollers. It is suitable for designs requiring reprogrammability in the field. Consider cascading multiple units if the target FPGA configuration size exceeds 512 kilobits. Verify compatibility with the specific FPGA family's master or slave mode requirements.

Part Context

This part belongs to the XC18V00 series of in-system programmable PROMs designed specifically for Xilinx FPGA configuration. The series includes various densities ranging from 512-kilobit to 4-megabit. These devices replace older OTP PROMs by allowing repeated reprogramming, facilitating design iterations and field updates without replacing the physical chip.

Replacement Considerations

XC18V512PQ20C

FAQ

How is the CF pin function handled in the 20-pin package?

The 20-pin packages do not have a dedicated CF pin. The CF function can be routed to pin 7 by setting the CF --> D4 option, provided the parallel output mode is not used.

What is the purpose of the CEO pin?

The Chip Enable Output (CEO) drives the CE input of the next PROM in a daisy chain, allowing multiple devices to be concatenated for storing larger configuration bitstreams.