XC18V04VQ44I

XC18V04VQ44I ISP configuration PROM 

The XC18V04VQ44I is an in-system programmable (ISP), 3.3 V configuration PROM manufactured by Xilinx (now part of AMD), engineered to store and deliver the configuration bitstream for Xilinx FPGA families. As a 4-megabit (512 KB) member of the XC18V00 series, it provides an easy-to-use and cost-effective method for reprogramming and storing FPGA configuration data, supporting both serial and parallel data transfer modes. Operating from a single 3.3 V supply (3.0 V to 3.6 V range) with a maximum supply current of 25 mA, the device is fabricated on a low-power advanced CMOS FLASH process and supports a maximum operating frequency of 33 MHz. The PROM interfaces simply to the FPGA and can be cascaded with other family members or with the XC17V00 one-time-programmable serial PROM family to store longer or multiple bitstreams, making it a versatile building block in FPGA-based architectures.

It is a staple in telecommunications infrastructure - such as routers, switches, baseband cards, and line cards - where dense logic and frequent firmware updates demand stable, nonvolatile bitstream storage. Industrial automation systems, programmable logic controllers, motor drives, and motion controllers leverage the PROM to configure Spartan, Virtex, and other Xilinx FPGA families that execute real-time control algorithms. In the automotive segment, it supports FPGA-based body electronics, infotainment clusters, and ADAS prototyping platforms, where its industrial temperature range and FLASH-based reliability are critical. The device also finds use in consumer electronics such as set-top boxes and gaming peripherals, in medical imaging and diagnostic equipment, and in aerospace and defense systems requiring secure, reprogrammable bitstream storage. 

Alternative configuration PROM Models

● XCF04S from Xilinx/AMD is a 4 Mb Platform Flash in-system programmable configuration PROM with enhanced JTAG and SelectMAP support, offering a denser, lower-power drop-in alternative in the same density class.

● EPC4 from Intel/Altera is a 4 Mb configuration device designed for Cyclone and Stratix FPGAs, providing comparable density and in-system programmability within the Quartus design flow.

● EPC4 from Intel/Altera is a 4 Mb configuration device designed for Cyclone and Stratix FPGAs, providing comparable density and in-system programmability within the Quartus design flow.

● EPCS4 from Intel/Altera is a 4 Mb serial configuration device using a simple SPI-like interface for low-cost Cyclone FPGA configuration, well-suited for cost-sensitive designs.