The XC18V02-PC44I is a high-performance 2Mbit in-system programmable configuration PROM manufactured by Xilinx (now AMD). This industrial-grade memory device provides a reliable and cost-effective solution for storing and reprogramming Xilinx FPGA configuration bitstreams. Designed for demanding applications, the XC18V02-PC44I operates across the extended industrial temperature range of -40°C to +85°C.
XC18V02-PC44I Overview and Key Features
The XC18V02-PC44I belongs to the XC18V00 series of 3.3V configuration PROMs. This device offers exceptional flexibility for FPGA configuration storage. Engineers choose this component for its combination of reliability, reprogrammability, and industrial-grade performance.
Why Choose the XC18V02-PC44I Configuration PROM?
First and foremost, the XC18V02-PC44I delivers outstanding versatility. It supports both serial and parallel configuration modes. Additionally, the device features 5V-tolerant I/O pins that accept multiple voltage levels. Moreover, with 20,000 program/erase cycles, this PROM ensures long-term reliability in field applications.
XC18V02-PC44I Technical Specifications
| Parameter |
Specification |
| Part Number |
XC18V02-PC44I |
| Manufacturer |
Xilinx / AMD |
| Memory Density |
2Mbit (2,097,152 bits) |
| Memory Type |
In-System Programmable PROM |
| Package Type |
PLCC-44 (Plastic Leaded Chip Carrier) |
| Pin Count |
44 Pins |
| Temperature Grade |
Industrial (-40°C to +85°C) |
| Supply Voltage (VCC) |
3.3V (3.0V to 3.6V range) |
| Output Voltage |
3.3V or 2.5V selectable |
| Technology |
Low-Power Advanced CMOS Flash |
Electrical Characteristics of XC18V02-PC44I
Understanding the electrical specifications is essential for proper circuit design. The table below summarizes the key electrical parameters.
| Electrical Parameter |
Value |
| Operating Voltage Range |
3.0V to 3.6V |
| Input Voltage Tolerance |
5V, 3.3V, and 2.5V compatible |
| Access Time |
20ns typical |
| Maximum Clock Frequency |
33 MHz |
| Serial Data Rate |
Up to 33 Mb/s |
| Parallel Data Rate |
Up to 264 Mb/s |
| Program/Erase Endurance |
20,000 cycles minimum |
| Data Retention |
20 years minimum |
XC18V02-PC44I Package Information
The PLCC-44 package offers several advantages for PCB design. It provides excellent thermal performance and easy socket mounting capability.
| Package Parameter |
Value |
| Package Type |
44-Pin PLCC |
| Package Code |
PC44I |
| Mounting Type |
Through-Hole / Socket |
| Lead Pitch |
1.27mm |
| RoHS Compliance |
Yes |
| Lead-Free Options |
Available |
| Moisture Sensitivity Level |
MSL 3 |
XC18V02-PC44I Configuration Modes
The XC18V02-PC44I supports multiple configuration modes for maximum design flexibility. Consequently, engineers can select the optimal mode for their specific application requirements.
Serial Configuration Mode
In serial configuration mode, data transfers through a single DATA pin (D0). The FPGA generates the configuration clock in Master Serial mode. Alternatively, an external oscillator can drive both devices in Slave Serial mode. This mode supports clock frequencies up to 33 MHz.
Parallel Configuration Mode (SelectMAP)
For faster configuration times, the parallel mode utilizes all eight DATA pins (D0-D7). As a result, data rates reach up to 264 Mb/s at 33 MHz. This mode significantly reduces system boot time compared to serial configuration.
XC18V02-PC44I Pinout and Interface
| Pin Name |
Function |
Description |
| D0-D7 |
DATA |
Configuration data output pins |
| CLK |
Clock |
Configuration clock input |
| CE |
Chip Enable |
Active-low chip enable |
| OE |
Output Enable |
Active-low output enable |
| CEO |
Cascade Enable Out |
Connects to CE of next device |
| CF |
Configuration Done |
Indicates completion status |
| TDI |
JTAG Data In |
JTAG test data input |
| TDO |
JTAG Data Out |
JTAG test data output |
| TCK |
JTAG Clock |
JTAG test clock |
| TMS |
JTAG Mode Select |
JTAG mode selection |
| VCC |
Power Supply |
3.3V power input |
| GND |
Ground |
Ground reference |
Key Features and Benefits
In-System Programmability
The XC18V02-PC44I can be reprogrammed without removal from the circuit board. Therefore, field updates and design changes become straightforward. This capability reduces manufacturing costs and enables remote firmware updates.
JTAG Boundary-Scan Support
Full IEEE 1149.1 (JTAG) compliance enables efficient testing and programming. Furthermore, JTAG support allows command initiation of standard FPGA configuration sequences. Board-level testing becomes more comprehensive with boundary-scan capability.
Cascading Capability
Multiple XC18V02-PC44I devices can be cascaded together. The CEO output drives the CE input of subsequent devices. Consequently, engineers can store longer bitstreams or multiple configuration images. This feature supports complex FPGA designs requiring larger storage capacity.
Industrial Temperature Operation
The “I” suffix indicates industrial temperature grade operation. The device functions reliably from -40°C to +85°C. As a result, it suits automotive, industrial automation, and outdoor equipment applications.
XC18V02-PC44I Applications
The XC18V02-PC44I serves numerous applications across various industries:
| Industry |
Application Examples |
| Industrial Automation |
PLC systems, motor drives, process control |
| Telecommunications |
Base stations, routers, network equipment |
| Automotive |
Infotainment systems, ADAS, powertrain control |
| Aerospace & Defense |
Avionics, radar systems, communication equipment |
| Medical Devices |
Imaging equipment, patient monitors, diagnostic tools |
| Consumer Electronics |
Set-top boxes, gaming systems, smart appliances |
Compatibility and Supported FPGAs
The XC18V02-PC44I is compatible with a wide range of Xilinx FPGA families. It seamlessly integrates with Spartan, Virtex, and other Xilinx programmable logic devices. The device also maintains backward compatibility with the XC17V00 one-time programmable PROM family.
XC18V02 Family Comparison
| Part Number |
Memory Density |
Package Options |
| XC18V512 |
512 Kbit |
PC20, SO20, VQ44 |
| XC18V01 |
1 Mbit |
PC20, SO20, PC44, VQ44 |
| XC18V02 |
2 Mbit |
PC20, SO20, PC44, VQ44 |
| XC18V04 |
4 Mbit |
PC44, VQ44 |
Part Number Decoder: XC18V02-PC44I
Understanding the part number helps identify the exact device variant:
| Code Segment |
Meaning |
| XC18V |
Xilinx 18V series configuration PROM |
| 02 |
2Mbit memory density |
| PC |
PLCC package type |
| 44 |
44-pin package |
| I |
Industrial temperature grade (-40°C to +85°C) |
Note: The “C” suffix indicates Commercial grade (0°C to +70°C).
Ordering Information
| Order Code |
Description |
| XC18V02-PC44I |
2Mbit PROM, PLCC-44, Industrial Grade |
| XC18V02-PC44C |
2Mbit PROM, PLCC-44, Commercial Grade |
| XC18V02-VQ44I |
2Mbit PROM, TQFP-44, Industrial Grade |
| XC18V02-VQ44C |
2Mbit PROM, TQFP-44, Commercial Grade |
Design Considerations for XC18V02-PC44I
When implementing the XC18V02-PC44I in your design, consider these important factors:
- Power Supply Decoupling: Place 0.1µF ceramic capacitors close to VCC pins for optimal noise immunity.
- Clock Signal Integrity: Ensure clean clock signals to prevent configuration errors during FPGA boot.
- Cascade Design: When cascading multiple devices, route CEO to CE signals carefully to minimize propagation delays.
- ESD Protection: Although the device includes internal ESD protection, follow standard handling procedures.
- Programming Environment: Use Xilinx ISE Design Suite or compatible software for device programming.
Conclusion
The XC18V02-PC44I represents an excellent choice for FPGA configuration storage applications. Its 2Mbit capacity, industrial temperature range, and versatile configuration modes make it suitable for demanding embedded systems. With robust JTAG support and cascading capability, this device offers the flexibility engineers need for complex designs. The proven reliability and long-term availability ensure it remains a dependable solution for configuration memory requirements.
