The XQ18V04VQ44N is a QPro military-grade 4Mbit in-system programmable (ISP) configuration Flash PROM manufactured by AMD (formerly Xilinx). This high-reliability configuration memory device is specifically designed for storing Xilinx FPGA bitstreams in demanding aerospace, defense, and industrial applications requiring extended temperature operation.

XQ18V04VQ44N Product Overview

The XQ18V04VQ44N belongs to the XQ18V04 family of configuration PROMs, offering a robust solution for non-volatile FPGA configuration storage. As a 3.3V rewritable PROM, it provides reliable bitstream storage for systems operating across the full military temperature range from -55°C to +125°C.

This configuration memory utilizes advanced CMOS Flash process technology, making it immune to static single event upset (SEU) — a critical feature for space and high-altitude applications where radiation exposure is a concern.

XQ18V04VQ44N Key Features and Benefits

Military-Grade Temperature Performance

The XQ18V04VQ44N operates reliably across an extended temperature range of -55°C to +125°C, meeting stringent military and aerospace requirements. This QPro (QML) qualified device ensures consistent performance in extreme environmental conditions.

Advanced Flash Memory Technology

Built on a low-power advanced CMOS Flash process, the XQ18V04VQ44N features memory cells that are inherently immune to static single event upset. This makes it ideal for radiation-sensitive applications in aerospace and defense sectors.

Flexible Configuration Modes

The device supports dual configuration modes to accommodate various system architectures. Serial configuration operates at speeds up to 20 MHz in both slow and fast modes, while parallel configuration achieves throughput up to 160 Mbps at 20 MHz clock frequency.

Robust Programming Endurance

With an endurance rating of 20,000 program/erase cycles, the XQ18V04VQ44N supports extensive field reprogramming throughout the product lifecycle. This feature is particularly valuable for systems requiring firmware updates or reconfiguration capabilities.

XQ18V04VQ44N Technical Specifications

XQ18V04VQ44N Electrical Characteristics

XQ18V04VQ44N Interface and Connectivity

I/O Compatibility

The XQ18V04VQ44N features 5V tolerant I/O pins that accept input signals at 5V, 3.3V, and 2.5V logic levels. The device provides selectable 3.3V or 2.5V output capability, ensuring seamless integration with diverse FPGA families and system voltage domains.

JTAG Boundary-Scan Support

Full IEEE Std 1149.1 boundary-scan (JTAG) support enables in-system programming and testing capabilities. JTAG command initiation of standard FPGA configuration simplifies system-level debugging and production testing workflows.

Cascading Capability

Multiple XQ18V04VQ44N devices can be cascaded to store longer bitstreams or multiple configuration images. The device is compatible with other configuration PROMs including XQR1701L and XQR17V16 one-time programmable configuration PROMs.

XQ18V04VQ44N Package Information

XQ18V04VQ44N Configuration Modes

Master Serial Mode

In Master Serial configuration mode, the FPGA generates a configuration clock that drives the PROM. After a short access time following the rising CCLK edge, data becomes available on the PROM DATA (D0) pin connected to the FPGA DIN pin. The FPGA automatically generates the appropriate number of clock pulses to complete configuration.

Slave Serial Mode

When operating in Slave Serial mode, both the PROM and FPGA receive clocking from an external source. This mode provides flexibility for systems with centralized clock distribution architectures.

SelectMAP Mode

For parallel configuration using SelectMAP (Slave) mode, an external oscillator generates the configuration clock driving both the PROM and FPGA simultaneously. This mode enables the highest configuration throughput at 160 Mbps.

XQ18V04VQ44N Applications

The XQ18V04VQ44N is ideally suited for high-reliability applications including:

• Aerospace and avionics systems
• Military and defense electronics
• Space-grade computing platforms
• Industrial control systems
• Medical devices requiring extended temperature operation
• Telecommunications infrastructure
• High-altitude applications
• Radiation-tolerant system designs

XQ18V04VQ44N Design Support

The XQ18V04VQ44N is fully supported by AMD design tools including Xilinx ISE Design Suite and Vivado Design Suite for bitstream generation and PROM file creation. The device integrates seamlessly with the Xilinx Alliance Series and Foundation Series software packages for comprehensive design workflow support.

XQ18V04VQ44N Ordering Information

Why Choose XQ18V04VQ44N for Your FPGA Design

The XQ18V04VQ44N delivers exceptional value for mission-critical applications requiring reliable FPGA configuration storage. Its combination of military-grade temperature range, radiation tolerance through SEU immunity, and flexible configuration options makes it the preferred choice for aerospace, defense, and high-reliability industrial applications.

With 20,000 program/erase cycles and IEEE 1149.1 JTAG support, the XQ18V04VQ44N enables extensive field serviceability while maintaining the highest levels of reliability demanded by modern electronic systems.