Overview of XC18V02-10VQ44C Configuration Memory
The XC18V02-10VQ44C is a high-performance 2-megabit in-system programmable (ISP) configuration PROM designed specifically for Xilinx FPGA applications. This advanced configuration memory device provides engineers with a reliable, cost-effective solution for storing and reprogramming FPGA bitstreams in demanding industrial environments.
Manufactured by Xilinx (now part of AMD), this configuration PROM features a 44-pin VQFP (Very Thin Quad Flat Pack) package, making it ideal for space-constrained PCB designs. The device operates on a 3.3V power supply and delivers exceptional performance with a 10ns access time, ensuring rapid FPGA configuration.
Key Technical Specifications
XC18V02-10VQ44C Performance Parameters
| Specification |
Value |
Description |
| Memory Capacity |
2 Megabits (256K x 8) |
Sufficient storage for complex FPGA configurations |
| Operating Voltage |
3.3V (3.0V – 3.6V) |
Standard voltage for compatibility |
| Access Time |
10ns (Commercial Grade) |
High-speed configuration loading |
| Package Type |
44-Pin VQFP |
10mm x 10mm footprint |
| Temperature Range |
0°C to +70°C |
Commercial temperature grade |
| Interface Type |
Parallel/Serial |
Flexible configuration options |
| Endurance |
20,000 Write/Erase Cycles |
Long operational lifespan |
| Data Retention |
20 Years |
Reliable long-term storage |
Electrical Characteristics
| Parameter |
Min |
Typ |
Max |
Unit |
| Supply Voltage (VCC) |
3.0 |
3.3 |
3.6 |
V |
| Supply Current (Active) |
– |
20 |
30 |
mA |
| Standby Current |
– |
10 |
50 |
μA |
| Input High Voltage |
2.0 |
– |
VCC+0.5 |
V |
| Input Low Voltage |
-0.5 |
– |
0.8 |
V |
| Output High Voltage |
2.4 |
– |
– |
V |
| Output Low Voltage |
– |
– |
0.4 |
V |
XC18V02-10VQ44C Features and Benefits
Advanced Configuration Capabilities
The XC18V02-10VQ44C configuration PROM offers several compelling advantages for FPGA system designers:
In-System Programmability: The device supports complete in-system programming, allowing field updates without removing components from the circuit board. This ISP capability significantly reduces maintenance costs and enables remote firmware updates.
Multiple Configuration Modes: Compatible with all Xilinx FPGA configuration modes including Master Serial, Master SelectMAP, Slave Parallel, and Slave SelectMAP modes. This flexibility ensures seamless integration across different FPGA architectures.
Daisy-Chain Capability: Multiple XC18V02-10VQ44C devices can be cascaded together using the CEO (Chip Enable Out) pin, enabling storage of larger configuration files. This cascading feature is fully compatible with other members of the XC18V00 family.
High Endurance and Reliability: With 20,000 write/erase cycles and 20-year data retention, this configuration PROM delivers exceptional reliability for industrial applications requiring frequent reconfiguration.
Pin Configuration and Package Details
XC18V02-10VQ44C Pinout Overview
The 44-pin VQFP package provides comprehensive interface options:
| Pin Function |
Description |
Pin Count |
| Data Output (D0-D7) |
8-bit parallel data bus |
8 pins |
| Address Inputs |
Internal address management |
Integrated |
| CLK |
Clock input for configuration |
1 pin |
| CE (Chip Enable) |
Device enable control |
1 pin |
| OE (Output Enable) |
Output control signal |
1 pin |
| CEO (Chip Enable Out) |
Cascade enable output |
1 pin |
| RESET |
Device reset function |
1 pin |
| VCC/GND |
Power and ground connections |
Multiple |
Package Dimensions
- Package Type: VQFP (Very Thin Quad Flat Pack)
- Body Size: 10mm x 10mm
- Pin Pitch: 0.8mm
- Height: 1.0mm typical
- Lead Count: 44 pins
XC18V02-10VQ44C Applications and Use Cases
Primary Applications
FPGA Configuration Storage: The primary application for the XC18V02-10VQ44C is storing configuration bitstreams for Xilinx FPGAs, particularly in systems requiring field programmability and remote updates.
Industrial Control Systems: Widely deployed in industrial automation, process control, and manufacturing equipment where reliable FPGA configuration is critical for operation.
Digital Signal Processing: Used in DSP applications requiring reconfigurable hardware for adaptive signal processing algorithms.
Communications Equipment: Essential component in telecommunications infrastructure, networking equipment, and data acquisition systems.
Industry Sectors
| Industry |
Application Example |
| Aerospace & Defense |
Avionics systems, radar processing |
| Medical Devices |
Diagnostic equipment, imaging systems |
| Automotive Electronics |
Advanced driver assistance systems (ADAS) |
| Test & Measurement |
Automated test equipment, oscilloscopes |
| Embedded Systems |
IoT devices, edge computing platforms |
Configuration Modes and Programming
Master Serial Mode Operation
In Master Serial mode, the FPGA generates the configuration clock that drives the XC18V02-10VQ44C. The PROM responds by providing configuration data on the D0 pin, which connects directly to the FPGA’s DIN (Data In) pin. This mode is ideal for standalone FPGA systems.
SelectMAP Configuration
Both Master and Slave SelectMAP modes are supported, offering parallel configuration for faster bitstream loading. In Master SelectMAP mode, the FPGA controls the configuration clock, while in Slave mode, an external oscillator provides timing.
Programming Methodology
The XC18V02-10VQ44C can be programmed using:
- In-circuit programming cables (JTAG interface)
- Device programmers for pre-production programming
- Custom ISP solutions for field updates
Compatibility and Cross-Reference
Compatible Xilinx FPGA Families
The XC18V02-10VQ44C is compatible with numerous Xilinx FPGA families:
- Spartan series FPGAs
- Virtex series devices
- Artix FPGA families
- Kintex FPGA platforms
Alternate Part Numbers
| Part Number |
Difference |
Application |
| XC18V02-10PC44C |
PLCC44 package |
Through-hole applications |
| XC18V02-10PC44I |
Industrial temp range (-40°C to +85°C) |
Harsh environments |
| XC18V02VQ44C |
Standard speed grade |
General purpose |
| XC18V02VQG44C |
Green package (RoHS) |
EU compliance required |
Design Considerations and Best Practices
PCB Layout Guidelines
When designing with the XC18V02-10VQ44C configuration PROM:
Decoupling Capacitors: Place 0.1μF ceramic capacitors close to each VCC pin to ensure stable operation and minimize supply noise.
Signal Integrity: Keep clock and data traces short and route them away from noisy signals to maintain signal integrity during configuration.
Thermal Management: While the device has low power consumption, ensure adequate airflow in enclosed systems operating near the upper temperature limit.
Power Supply Requirements
The XC18V02-10VQ44C requires a clean, stable 3.3V power supply:
- Use low-dropout (LDO) regulators for noise-sensitive applications
- Implement proper power sequencing with FPGA power supplies
- Monitor supply voltage to remain within 3.0V to 3.6V range
Ordering Information and Availability
XC18V02-10VQ44C Part Number Breakdown
XC18V02-10VQ44C decodes as:
- XC: Xilinx Configuration PROM
- 18V: 3.3V In-System Programmable
- 02: 2-megabit capacity
- -10: 10ns access time (speed grade)
- VQ: VQFP package
- 44: 44-pin count
- C: Commercial temperature range (0°C to +70°C)
Temperature Grade Options
| Grade |
Temperature Range |
Part Suffix |
| Commercial |
0°C to +70°C |
C |
| Industrial |
-40°C to +85°C |
I |
Technical Support and Resources
Documentation and Datasheets
Engineers working with the XC18V02-10VQ44C can access comprehensive technical documentation including detailed datasheets, application notes, and programming guides from AMD/Xilinx support resources.
Development Tools
Vivado Design Suite: Modern integrated development environment for FPGA design and configuration PROM programming.
ISE Design Tools: Legacy toolchain supporting XC18V00 series devices and older FPGA families.
Impact Software: Dedicated configuration PROM programming utility for in-system updates.
Quality and Compliance
Certifications and Standards
| Standard |
Compliance Status |
| RoHS |
Check variant (G suffix for RoHS3 compliant) |
| REACH |
Compliant |
| MSL Rating |
Level 3 (168 hours at 30°C/60% RH) |
| ESD Protection |
Human Body Model (HBM) Class 1C |
Quality Assurance
All XC18V02-10VQ44C devices undergo rigorous testing including:
- Parametric testing at operating temperature extremes
- Programming and erase cycle verification
- Data retention validation
- Package integrity inspection
Comparison with Alternative Solutions
XC18V02 vs XC18V04
| Feature |
XC18V02-10VQ44C |
XC18V04 |
| Capacity |
2 Megabits |
4 Megabits |
| Package |
44-pin VQFP |
44-pin VQFP/48-pin |
| Access Time |
10ns |
10ns |
| Use Case |
Small to medium FPGAs |
Large FPGA configurations |
Frequently Asked Questions
What FPGAs are compatible with XC18V02-10VQ44C?
The XC18V02-10VQ44C works with most Xilinx FPGA families including Spartan, Virtex, Artix, and Kintex series devices that support serial or parallel configuration modes.
Can multiple XC18V02-10VQ44C devices be cascaded?
Yes, multiple devices can be daisy-chained using the CEO (Chip Enable Out) pin to expand total configuration memory capacity for larger FPGA bitstreams.
What is the difference between -10 speed grade variants?
The -10 designation indicates a 10ns access time, representing the device’s performance class. This is the standard commercial speed grade for the XC18V02 family.
How is the XC18V02-10VQ44C programmed?
The device supports in-system programming via JTAG interface using Xilinx programming cables, or can be programmed using standalone device programmers before board assembly.
What is the typical power consumption?
Active current consumption is approximately 20-30mA during configuration, with standby current as low as 10μA when not actively transferring data.
Conclusion
The XC18V02-10VQ44C represents a mature, reliable solution for FPGA configuration storage in professional applications. Its combination of in-system programmability, robust endurance characteristics, and flexible configuration modes makes it an excellent choice for engineers developing FPGA-based systems across industrial, medical, automotive, and aerospace sectors.
With its 2-megabit capacity, 10ns access speed, and 44-pin VQFP package, this configuration PROM delivers the perfect balance of performance, size, and functionality for modern FPGA designs requiring field-updateable configuration memory.
