Overview of XC18V04-VQ44C Configuration Memory
The XC18V04-VQ44C is a cutting-edge in-system programmable configuration PROM (Programmable Read-Only Memory) manufactured by AMD (formerly Xilinx). This 4-megabit configuration memory device delivers reliable, non-volatile storage specifically designed for FPGA configuration applications. With its robust 3.3V operation and compact 44-pin VQFP package, the XC18V04-VQ44C represents an optimal solution for engineers seeking cost-effective FPGA configuration management.
Key Features of XC18V04-VQ44C
Memory and Performance Specifications
The XC18V04-VQ44C offers exceptional performance characteristics that make it suitable for demanding applications:
- Memory Capacity: 4 megabits (512K x 8 configuration)
- Operating Voltage: 3.0V to 3.6V supply range
- Access Time: Fast 20ns access time for quick configuration
- Clock Frequency: Supports up to 33 MHz maximum clock frequency
- Programming: In-System Programmable (ISP) capability
Physical and Environmental Specifications
| Specification |
Details |
| Package Type |
44-pin VQFP (Very Thin Quad Flat Pack) |
| Package Dimensions |
10mm x 10mm |
| Operating Temperature |
0°C to +70°C (Commercial grade) |
| Mounting Type |
Surface Mount Technology (SMT) |
| Thermal Resistance |
~50°C/W (θJA) |
Advanced Technical Features
| Feature |
Specification |
| Memory Interface |
Parallel/Serial configuration modes |
| Data Width |
8-bit parallel or serial output |
| Supply Current |
Typical 10mA active current |
| Boundary-Scan |
IEEE 1149.1 JTAG compliant |
| User Scratch Pad |
32-bit programmable identification |
Applications and Use Cases
Primary Applications for XC18V04-VQ44C
The XC18V04-VQ44C configuration PROM excels in various industry applications:
- FPGA Configuration Storage: Primary function as configuration memory for Xilinx FPGA devices in Master Serial mode
- Telecommunications Equipment: Reliable configuration storage for network infrastructure
- Industrial Control Systems: Non-volatile memory for manufacturing automation
- Consumer Electronics: Configuration management for smart devices
- Automotive Systems: Robust memory solution for vehicle electronics
- Medical Devices: Dependable configuration storage for healthcare equipment
Technical Architecture and Design
Configuration Memory Architecture
The XC18V04-VQ44C employs advanced CMOS technology to deliver:
- Non-volatile Storage: Data retention without power supply
- Cascadable Design: Multiple devices can be daisy-chained using CEO output
- Auto-increment Addressing: Simplified configuration data streaming
- Low Power Consumption: Efficient operation for battery-powered applications
Pin Configuration and Interface
Control Signals Table
| Signal Name |
Function |
Description |
| CE# |
Chip Enable |
Active-low chip enable input |
| OE# |
Output Enable |
Active-low output enable control |
| WE# |
Write Enable |
Programming control signal |
| CLK |
Clock Input |
Configuration clock input |
| D0-D7 |
Data Output |
8-bit parallel data output |
| CEO |
Chip Enable Out |
Cascading output for multiple devices |
Programming and Configuration
In-System Programming Capability
The XC18V04-VQ44C supports flexible programming methods:
- JTAG Programming: IEEE 1149.1 boundary-scan programming interface
- In-Circuit Programming: Update configuration without device removal
- Serial Programming: Compatible with standard PROM programmers
- Cascade Programming: Program multiple devices simultaneously
Configuration Mode Support
The device operates seamlessly with FPGA configuration modes:
- Master Serial Mode: FPGA generates configuration clock
- Slave Serial Mode: External clock source control
- Parallel Configuration: High-speed 8-bit parallel data transfer
Quality and Reliability Standards
Manufacturing Standards
| Standard |
Compliance |
| RoHS Status |
RoHS non-compliant (Tin/Lead Sn85Pb15 version available) |
| MSL Rating |
Moisture Sensitivity Level per JEDEC standards |
| ESD Protection |
Proper ESD handling procedures required |
| Quality Assurance |
365-day quality assurance coverage |
Product Specifications Summary
Electrical Characteristics Table
| Parameter |
Min |
Typ |
Max |
Unit |
| Supply Voltage (VCC) |
3.0 |
3.3 |
3.6 |
V |
| Operating Current |
– |
10 |
– |
mA |
| Access Time |
– |
– |
20 |
ns |
| Clock Frequency |
– |
– |
33 |
MHz |
| Input Voltage High (VIH) |
2.0 |
– |
VCC+0.5 |
V |
| Input Voltage Low (VIL) |
-0.5 |
– |
0.8 |
V |
Absolute Maximum Ratings
| Parameter |
Minimum |
Maximum |
Unit |
| Storage Temperature |
-65 |
+150 |
°C |
| Supply Voltage |
-0.5 |
+4.0 |
V |
| Input Voltage |
-0.5 |
VCC+0.5 |
V |
| Lead Temperature |
– |
+300 |
°C |
Ordering Information and Package Details
Part Number Breakdown
XC18V04VQ44C nomenclature explained:
- XC18V = Product family (In-System Programmable PROM)
- 04 = Memory density (4 Megabit)
- VQ = Package type (VQFP)
- 44 = Pin count (44 pins)
- C = Commercial temperature range (0°C to +70°C)
Package Specifications
- Package Style: Plastic Very Thin Quad Flat Pack
- Body Size: 10mm x 10mm
- Pin Pitch: 0.8mm
- Mounting Height: Low profile for space-constrained designs
- Lead Finish: Tin/Lead (Sn85Pb15) or Lead-free options available
Competitive Advantages
Why Choose XC18V04-VQ44C?
- Cost-Effective Solution: Competitive pricing for high-volume production
- Proven Reliability: Established track record in mission-critical applications
- Easy Integration: Seamless compatibility with Xilinx FPGA ecosystem
- Flexible Programming: Multiple programming options for development and production
- Industry Standard: Widely adopted in various market segments
Design Considerations and Best Practices
PCB Layout Recommendations
For optimal performance of the XC18V04-VQ44C:
- Power Supply Decoupling: Place 0.1µF ceramic capacitors close to VCC pins
- Signal Integrity: Keep clock and data traces short and properly terminated
- Thermal Management: Ensure adequate PCB copper area for heat dissipation
- Ground Plane: Use solid ground plane for noise reduction
Power Supply Design
- Voltage Regulation: Use stable 3.3V regulator with ±5% tolerance
- Current Capacity: Ensure power supply can deliver peak programming currents
- Noise Filtering: Implement proper power supply filtering techniques
Compatibility and Ecosystem
Compatible FPGA Families
The XC18V04-VQ44C works with various FPGA platforms:
- Spartan Series FPGAs
- Virtex Series FPGAs
- XC17V00 one-time programmable PROM family
- Other Xilinx FPGA devices supporting Master Serial mode
Development Tools Support
Supported by industry-standard tools:
- Xilinx Vivado Design Suite
- ISE Design Tools
- JTAG programming utilities
- Third-party PROM programmers
Product Status and Availability
Current Market Status
- Product Status: Check with authorized distributors for current availability
- Lead Time: Varies by supplier and quantity requirements
- Alternative Solutions: Contact suppliers for compatible replacement options
- Long-term Support: Consult AMD/Xilinx for product lifecycle information
Technical Support and Resources
Documentation Resources
Access comprehensive technical information:
- Datasheet: Complete electrical and mechanical specifications
- Application Notes: Design guidelines and best practices
- Reference Designs: Example circuits and layouts
- Programming Guides: Step-by-step programming instructions
Getting Additional Help
For technical assistance with the XC18V04-VQ44C:
- Contact authorized distributors for pricing and availability
- Reach out to AMD technical support for design questions
- Join online FPGA communities for peer support
- Consult with Xilinx FPGA specialists for integration guidance
Conclusion
The XC18V04-VQ44C configuration PROM represents a reliable, cost-effective solution for FPGA configuration storage. With its 4-megabit capacity, in-system programming capability, and robust design, this device meets the demanding requirements of modern electronic systems. Whether you’re developing telecommunications equipment, industrial controllers, or consumer electronics, the XC18V04-VQ44C provides the configuration memory performance and flexibility your project needs.
For procurement inquiries, technical specifications, or application support for the XC18V04-VQ44C, contact authorized distributors or visit the manufacturer’s website for the latest product information and resources.
