The XC18V512VQ44C is a high-performance 512-kilobit in-system programmable configuration PROM manufactured by AMD (formerly Xilinx). This non-volatile memory device provides a reliable and cost-effective solution for storing and loading FPGA configuration bitstreams. As part of the XC18V00 series, the XC18V512VQ44C offers seamless integration with Xilinx FPGA families including Spartan, Virtex, and Virtex-II devices.
XC18V512VQ44C Key Features and Benefits
The XC18V512VQ44C configuration PROM delivers several advanced features that make it ideal for modern embedded systems and industrial applications.
In-System Programming Capability
One of the standout features of the XC18V512VQ44C is its in-system programmability. Engineers can reprogram the device directly on the circuit board without removing it from the system. This capability reduces production costs, simplifies firmware updates, and enables field upgrades for deployed products.
IEEE 1149.1 JTAG Boundary-Scan Support
The XC18V512VQ44C fully supports IEEE 1149.1 boundary-scan testing through a four-wire Test Access Port (TAP). This integration allows manufacturers to perform both in-system programming and board-level testing using standard Automatic Test Equipment, streamlining the manufacturing and quality control processes.
Low-Power CMOS Technology
Built on advanced low-power CMOS NOR Flash process technology, the XC18V512VQ44C minimizes power consumption while maintaining reliable performance. This makes it particularly suitable for battery-powered devices and energy-efficient designs.
XC18V512VQ44C Technical Specifications
| Parameter |
Specification |
| Part Number |
XC18V512VQ44C |
| Manufacturer |
AMD (formerly Xilinx) |
| Memory Density |
512 Kilobits (512Kb) |
| Memory Type |
Non-Volatile Configuration PROM |
| Supply Voltage |
3.0V to 3.6V |
| Interface Type |
Parallel/Serial |
| Package Type |
44-VQFP (10mm x 10mm) |
| Pin Count |
44 Pins |
| Temperature Range |
0°C to +70°C (Commercial) |
| Mounting Type |
Surface Mount |
XC18V512VQ44C Electrical Characteristics
| Characteristic |
Min |
Typ |
Max |
Unit |
| Supply Voltage (VCC) |
3.0 |
3.3 |
3.6 |
V |
| Input Voltage (VIH) |
2.0 |
– |
VCC + 0.3 |
V |
| Input Voltage (VIL) |
-0.3 |
– |
0.8 |
V |
| Endurance (Program/Erase Cycles) |
– |
– |
20,000 |
Cycles |
| Data Retention |
20 |
– |
– |
Years |
FPGA Compatibility for XC18V512VQ44C
The XC18V512VQ44C configuration PROM is designed for seamless compatibility with multiple Xilinx FPGA families. The 512Kb memory capacity is suitable for configuring smaller FPGA devices.
| FPGA Family |
Compatible Devices |
| Spartan |
XCS05, XCS10, XCS20 |
| Spartan-XL |
XCS05XL, XCS10XL, XCS20XL |
| Spartan-II |
XC2S15, XC2S30 |
| Spartan-IIE |
XC2S50E, XC2S100E |
| Virtex |
XCV50 |
XC18V512VQ44C Pin Configuration
Package Information
The XC18V512VQ44C utilizes a 44-pin Very Thin Quad Flat Package (VQFP) with 0.8mm pitch. The compact 10mm x 10mm footprint makes it suitable for space-constrained PCB designs.
Key Pin Functions
| Pin Name |
Function Description |
| VCC |
Positive 3.3V Power Supply |
| GND |
Ground Connection |
| CE |
Chip Enable Input |
| OE/RESET |
Output Enable / Reset |
| CLK |
Configuration Clock Input |
| DATA (D0-D7) |
Parallel Data Outputs |
| CEO |
Cascading Enable Output |
| TDI |
JTAG Test Data Input |
| TDO |
JTAG Test Data Output |
| TMS |
JTAG Test Mode Select |
| TCK |
JTAG Test Clock |
XC18V512VQ44C Configuration Modes
The XC18V512VQ44C supports multiple configuration modes to interface with various Xilinx FPGA devices, providing flexibility in system design.
Master Serial Mode
In Master Serial mode, the FPGA generates the configuration clock that drives the PROM. Data becomes available on the D0 pin after CE and OE are enabled. The FPGA generates the appropriate number of clock pulses to complete configuration.
Slave Serial Mode
When operating in Slave Serial mode, an external oscillator generates the configuration clock that drives both the PROM and the FPGA, allowing for synchronized multi-device configurations.
SelectMAP Mode
The SelectMAP mode enables parallel data transfer using all eight data outputs (D0-D7), significantly increasing configuration speed for larger FPGA designs.
XC18V512VQ44C Cascading Capability
Multiple XC18V512VQ44C devices can be cascaded together to store longer configuration bitstreams. The CEO (Cascading Enable Output) pin connects to the CE input of the next PROM in the chain. All devices in the chain share interconnected clock inputs and data outputs.
Cascading Configuration
| Feature |
Description |
| Chain Method |
CEO to CE connection |
| Clock Distribution |
Shared CLK signal |
| Data Bus |
Shared D0-D7 outputs |
| Compatible Devices |
XC18V01, XC18V02, XC18V04, XC17V00 family |
Applications for XC18V512VQ44C Configuration PROM
The XC18V512VQ44C finds application across numerous industries requiring reliable FPGA configuration storage.
Industrial Control Systems
Industrial automation systems benefit from the XC18V512VQ44C’s robust non-volatile storage and field-programmability. PLCs, motor controllers, and process automation equipment can store and update FPGA configurations without physical device replacement.
Telecommunications Equipment
Network routers, switches, and communication infrastructure utilize the XC18V512VQ44C for reliable boot configurations. The JTAG interface enables remote firmware updates and diagnostics.
Consumer Electronics
Consumer devices requiring FPGA-based processing leverage the compact package and low power consumption of the XC18V512VQ44C for cost-effective designs.
Automotive Technology
Automotive electronics applications benefit from the device’s operating temperature range and proven reliability for dashboard systems, infotainment, and driver assistance modules.
XC18V512VQ44C Ordering Information
| Order Code |
Temperature Grade |
Package |
Lead-Free |
| XC18V512VQ44C |
Commercial (0°C to +70°C) |
44-VQFP |
Yes |
| XC18V512VQ44I |
Industrial (-40°C to +85°C) |
44-VQFP |
Yes |
Programming Tools and Software Support
The XC18V512VQ44C is supported by Xilinx iMPACT programming software, which provides comprehensive tools for device programming, verification, and debugging. The device accepts standard .mcs and .exo file formats for configuration data.
Supported Programming Methods
| Method |
Description |
| JTAG Programming |
Via TAP interface using iMPACT |
| In-System Programming |
Through JTAG chain on assembled boards |
| Stand-Alone Programmers |
Third-party device programmers |
Why Choose XC18V512VQ44C for Your Design
The XC18V512VQ44C offers engineers a proven, reliable solution for FPGA configuration storage. Key advantages include in-system reprogrammability eliminating the need for device removal during updates, IEEE 1149.1 JTAG compliance for standardized testing and programming, guaranteed 20,000 program/erase cycle endurance for long product lifecycles, 20-year data retention ensuring long-term reliability, and compatibility with industry-standard Xilinx development tools.
Whether you’re designing industrial controllers, telecommunications equipment, or consumer electronics, the XC18V512VQ44C configuration PROM delivers the performance and reliability your FPGA-based systems demand.
