The XQR17V16VQ44N is a radiation-hardened, high-reliability configuration PROM designed specifically for aerospace and defense applications. This 16-megabit one-time programmable memory provides robust storage for Xilinx FPGA configuration bitstreams in extreme radiation environments.
Key Features of XQR17V16VQ44N Configuration PROM
Radiation Hardness Specifications
The XQR17V16VQ44N delivers exceptional radiation tolerance for mission-critical space applications:
- Total Ionizing Dose (TID): Guaranteed 50 kRad(Si) operation per MIL-STD-1019.5
- Single Event Latch-Up (SEL): Immune to LET greater than 120 MeV/cm²/mg
- Single Event Upset (SEU): Zero bit cross-section for LET greater than 120 MeV/cm²/mg
- Epitaxial Substrate: Enhanced radiation performance through specialized fabrication
Storage and Performance Characteristics
| Specification |
Value |
| Storage Capacity |
16 Mbit (16,777,216 bits) |
| Serial Configuration Speed |
Up to 33 Mb/s |
| Parallel Configuration Speed |
Up to 264 Mb/s at 33 MHz |
| Supply Voltage |
3.3V (3.0V to 3.6V operating range) |
| Data Retention |
Guaranteed 20 years |
| Operating Temperature |
-55°C to +125°C (full military range) |
XQR17V16VQ44N Technical Specifications
Electrical Characteristics
The XQR17V16VQ44N configuration PROM operates efficiently across demanding environmental conditions:
| Parameter |
Min |
Max |
Unit |
| High-level Input Voltage (VIH) |
2.0V |
VCC |
V |
| Low-level Input Voltage (VIL) |
0V |
0.8V |
V |
| High-level Output Voltage (VOH) |
2.4V |
– |
V |
| Low-level Output Voltage (VOL) |
– |
0.4V |
V |
| Active Supply Current (ICCA) |
– |
100mA |
mA |
| Standby Supply Current (ICCS) |
– |
1mA |
mA |
Timing Performance for XQR17V16VQ44N
| Timing Parameter |
Description |
Max Time |
| TCAC |
Clock to Data Delay |
20 ns |
| TOE |
Output Enable to Data Delay |
15 ns |
| TCE |
Chip Enable to Data Delay |
20 ns |
| TCYC |
Clock Cycle Period |
50 ns (min) |
| TDF |
Data Float Delay |
35 ns |
How XQR17V16VQ44N Works with FPGA Systems
Dual Configuration Modes
The XQR17V16VQ44N supports two distinct operating modes for maximum flexibility:
Serial Configuration Mode
In serial mode, the device connects to FPGAs configured for Master Serial or Slave Serial operation. Data streams sequentially through a single data line, synchronized by the CCLK signal. This mode minimizes pin count and simplifies board layout.
Parallel SelectMAP Mode
For applications requiring faster configuration, the parallel mode provides eight-bit wide data transfer. This configuration achieves up to 264 Mb/s throughput, dramatically reducing FPGA boot time in time-critical systems.
Cascading Multiple XQR17V16VQ44N Devices
Complex FPGA designs requiring more than 16 Mbit of configuration storage can cascade multiple XQR17V16VQ44N PROMs:
- CEO Output: Automatically enables the next device in the chain
- Shared Clock: All cascaded devices use the same CCLK signal
- Seamless Operation: No external logic required for multi-device configurations
- Scalable Architecture: Mix and match with other QPro family members
XQR17V16VQ44N Package and Pinout
CK44 Ceramic Package Configuration
The XQR17V16VQ44N utilizes a 44-pin ceramic chip carrier (CK44) package optimized for harsh environments:
| Pin Function |
Pin Numbers |
Description |
| Data Outputs (D0-D7) |
2, 35, 4, 33, 15, 31, 20, 25 |
8-bit parallel or single serial data |
| CLK |
5 |
Clock input for address incrementing |
| RESET/OE |
19 |
Programmable polarity reset/output enable |
| CE |
21 |
Chip enable with low-power standby |
| CEO |
27 |
Cascade enable output |
| BUSY |
30 |
Optional data flow control |
| VCC |
14, 22, 23, 32, 42, 44 |
3.3V power supply |
| VPP |
41 |
Programming voltage (connect to VCC for operation) |
| GND |
3, 12, 24, 34, 43 |
Ground connections |
Programming the XQR17V16VQ44N Configuration PROM
Software and Tools Compatibility
The XQR17V16VQ44N integrates seamlessly with standard development workflows:
- ISE Foundation: Full support for design compilation and PROM file generation
- ISE WebPACK: Free toolchain compatibility for cost-effective development
- Commercial Programmers: Compatible with leading PROM programming equipment
- Hex Format Output: Standard format ensures universal programmer support
Programmable Features
| Feature |
Options |
Default |
| RESET Polarity |
Active-High or Active-Low |
Active-High |
| BUSY Function |
Enabled or Disabled |
Disabled |
| Output Enable |
Programmable polarity |
Active-High |
Applications for XQR17V16VQ44N Radiation Hardened PROM
Aerospace and Defense Systems
The XQR17V16VQ44N excels in radiation-intensive environments:
- Satellite Payloads: Reliable FPGA configuration in orbit
- Deep Space Probes: Extended mission duration with guaranteed data retention
- Military Avionics: Hardened electronics for defense platforms
- Nuclear Facilities: Radiation-tolerant control systems
High-Reliability Commercial Applications
Beyond space applications, the XQR17V16VQ44N serves demanding terrestrial markets:
- Medical Imaging: CT scanners and radiation therapy equipment
- Particle Accelerators: Configuration storage near high-energy physics experiments
- Industrial Radiation Environments: Nuclear power plant instrumentation
XQR17V16VQ44N Ordering Information and Grades
Available Temperature and Flow Options
| Part Number |
Grade |
Temperature Range |
Qualification |
| XQR17V16CK44M |
M-Grade |
-55°C to +125°C |
Military screening |
| XQR17V16CK44V |
QPRO_PLUS (V-Grade) |
-55°C to +125°C |
Enhanced screening |
Quality and Reliability Standards
The XQR17V16VQ44N meets stringent quality requirements:
- QML Certification: Qualified Manufacturers List compliance
- Fabricated on Epitaxial Substrate: Superior radiation performance
- Low-Power CMOS Process: Floating-gate technology for reliable retention
- Full Military Temperature Range: Guaranteed operation across extreme conditions
Design Considerations for XQR17V16VQ44N Implementation
Connection Best Practices
Optimize your XQR17V16VQ44N implementation with these guidelines:
- VPP Pin Connection: Always connect VPP to VCC during normal operation – never leave floating
- RESET/OE Configuration: Connect to FPGA INIT pin for automatic reconfiguration support
- CE Pin Management: Connect to FPGA DONE with pullup resistor to minimize standby current
- Pullup Resistors: Use 4.7kΩ resistors on critical control signals
Power Supply Requirements
| Specification |
Requirement |
Notes |
| VCC Rise Time |
1.0 to 50 ms |
Must rise monotonically from 0V |
| Supply Voltage Range |
3.0V to 3.6V |
Tight regulation recommended |
| Decoupling |
0.1µF per VCC pin |
Place close to device |
Why Choose XQR17V16VQ44N for Your Design
The XQR17V16VQ44N radiation-hardened configuration PROM offers unmatched reliability for critical FPGA applications. With proven radiation tolerance, flexible configuration modes, and guaranteed 20-year data retention, this device ensures mission success in the harshest environments.
Whether you’re designing satellite systems, defense electronics, or industrial radiation monitoring equipment, the XQR17V16VQ44N provides the robust, reliable configuration storage your project demands. Its compatibility with standard Xilinx development tools and commercial programming equipment streamlines development while maintaining the highest quality standards.
For applications requiring radiation-hardened FPGA configuration with proven reliability and comprehensive support, the XQR17V16VQ44N stands as the industry-leading solution.
