XC18V04VQ44C

Xilinx's XC18V04VQ44C is a discontinued 4 Mbit in-system programmable Configuration PROM from the Platform Flash family, supplied in a 44-lead TQFP package. Rated for commercial temperature operation (0°C to +70°C), this non-volatile memory device stores configuration bitstreams for Xilinx SRAM-based FPGAs and supports IEEE Std 1532 JTAG programming, enabling in-system updates and cascaded chaining of multiple PROMs to configure larger or multiple FPGAs from a single scan chain. Its 3.3 V core supply and compact TQFP footprint made it a common selection for space-constrained industrial and embedded designs.

As an end-of-life part, the XC18V04VQ44C is no longer in active production and has been officially discontinued by the manufacturer. For programs that still rely on this PROM in existing board designs—such as legacy industrial controllers, test instrumentation, defense subsystems, and medical imaging equipment—ZZX Electronics provides sustaining stock with full date-code traceability. Sourcing verified, traceable obsolete components avoids the significant cost, schedule impact, and re-certification burden of a board respin, offering a practical path for maintaining long-fielded systems where a drop-in replacement remains the preferred approach over new-part qualification.