XC18V512VQ44I

Overview

The AMD XC18V512VQ44I is a 512-kilobit (524,288-bit) in-system programmable configuration PROM designed for Xilinx FPGAs. It operates on a single 3.3V supply with VCCO supporting 3.3V or 2.5V output levels. The device features 5V tolerant I/O pins and supports both serial and parallel configuration modes. It includes IEEE 1149.1 JTAG support for programming and boundary-scan testing. The component is housed in a 44-pin VQFP package and is rated for industrial temperature ranges from -40°C to +85°C.

Feature Summary

• In-system programmable via standard 4-pin JTAG interface
• Supports Master Serial, Slave Serial, and SelectMAP configuration modes
• Cascadable architecture using CEO output for multi-device chains
• Integrated data security features to prevent unauthorized reading

Applications

• Configuration of Virtex-II and Virtex-II Pro FPGAs
• Configuration of Spartan-II and Spartan-IIE FPGAs
• Configuration of Virtex-E and Spartan-IIE FPGAs

Procurement Notes

Verify the specific suffix 'VQ44I' corresponds to the 44-pin VQFP package and industrial temperature grade (-40°C to +85°C). Confirm that the source document explicitly lists this part number, as datasheets often group specifications by family (XC18V00). Ensure compatibility with the target FPGA's voltage requirements (3.3V/2.5V VCCO) before procurement.

Selection Notes

Select this component when a 512-kilobit capacity is sufficient for the target FPGA bitstream. It is suitable for designs requiring in-system reprogrammability and JTAG-based testing. Consider cascading multiple units if the FPGA configuration size exceeds 512 kilobits. Verify that the design supports either serial or parallel mode interfaces as defined by the FPGA selection.

Part Context

This component belongs to the XC18V00 series of in-system programmable configuration PROMs manufactured by Xilinx (now AMD). These devices are specifically engineered to store and provide configuration bitstreams for various Xilinx FPGA families. The series offers different capacities ranging from 512 kilobits to 4 megabits to match diverse FPGA configuration needs.

Replacement Considerations

Direct substitutes include other members of the XC18V00 family such as XC18V01, XC18V02, or XC18V04, depending on required memory capacity. Cross-family replacements like the XC17V00 one-time programmable PROMs may be considered if reprogrammability is not required, though pinouts and electrical characteristics differ.