The XC18V01SO20I is a high-performance, 1-Megabit in-system programmable (ISP) configuration PROM manufactured by AMD (formerly Xilinx). This industrial-grade memory IC provides reliable FPGA configuration storage in a compact 20-pin SOIC package, making it an essential component for Xilinx FPGA designs requiring non-volatile bitstream storage.
XC18V01SO20I Key Features and Benefits
The XC18V01SO20I configuration PROM delivers exceptional reliability and flexibility for embedded systems and industrial applications. Engineers choose this device for its robust performance across demanding operating conditions.
High Endurance and Long-Term Reliability
This ISP PROM guarantees 20,000 program/erase cycles with a minimum 20-year data retention period. The industrial temperature range of -40°C to +85°C ensures consistent operation in harsh environments, from factory automation to outdoor telecommunications equipment.
Dual Configuration Modes
The XC18V01SO20I supports both serial and parallel configuration modes, providing design flexibility for various FPGA families.
XC18V01SO20I Technical Specifications
| Parameter |
Specification |
| Part Number |
XC18V01SO20I |
| Manufacturer |
AMD (Xilinx) |
| Memory Type |
In-System Programmable PROM |
| Memory Density |
1 Mbit (1,048,576 bits) |
| Supply Voltage (VCCINT) |
3.3V |
| I/O Voltage Tolerance |
5V, 3.3V, 2.5V |
| Temperature Range |
-40°C to +85°C (Industrial) |
| Package Type |
20-Pin SOIC |
| Endurance |
20,000 Program/Erase Cycles |
| Data Retention |
20 Years Minimum |
XC18V01SO20I Configuration Speed Specifications
| Configuration Mode |
Maximum Speed |
Data Rate |
| Serial (Slow/Fast) |
Up to 33 MHz |
33 Mb/s |
| Parallel (8-bit) |
Up to 33 MHz |
Up to 264 Mb/s |
XC18V01SO20I Pin Configuration Overview
| Pin Name |
Function |
| CCLK |
Configuration Clock Input |
| DATA (D0-D7) |
Data Output Pins |
| CE |
Chip Enable (Active Low) |
| CEO |
Chip Enable Output (Cascade) |
| OE/RESET |
Output Enable / Reset |
| TDI, TDO, TMS, TCK |
JTAG Interface Pins |
| VCCINT |
3.3V Power Supply |
| GND |
Ground Connection |
Compatible FPGA Families
The XC18V01SO20I configuration PROM is designed to work seamlessly with multiple Xilinx FPGA families, including Spartan-II, Spartan-IIE, Spartan-3, Virtex, Virtex-E, Virtex-II, and Virtex-II Pro series devices. This broad compatibility makes it a versatile choice for legacy designs and new development projects.
XC18V01SO20I Applications
This industrial-grade configuration PROM serves critical roles across multiple industries.
Industrial Automation and Control Systems
Factory automation equipment, programmable logic controllers (PLCs), and motor drive systems benefit from the XC18V01SO20I’s reliable configuration storage and wide temperature tolerance.
Telecommunications Infrastructure
Network switches, routers, and base station equipment utilize this PROM for dependable FPGA initialization in mission-critical communication systems.
Aerospace and Defense Electronics
The industrial temperature rating and high endurance make the XC18V01SO20I suitable for avionics, radar systems, and military-grade electronic equipment.
Medical Device Manufacturing
Diagnostic imaging systems, patient monitoring equipment, and laboratory instruments require the long-term reliability this configuration PROM provides.
Why Choose XC18V01SO20I for Your FPGA Design?
Simple FPGA Interface
The XC18V01SO20I connects directly to Xilinx FPGAs with minimal external components. In Master Serial mode, the FPGA generates the configuration clock, simplifying board design and reducing component count.
Cascadable Architecture
Multiple XC18V01SO20I devices can be cascaded using the CEO (Chip Enable Output) pin to store longer bitstreams or multiple configurations. This feature supports complex multi-FPGA designs without additional control logic.
IEEE 1149.1 JTAG Support
Full boundary-scan compliance enables in-system programming through standard JTAG interfaces. Engineers can program, verify, and debug configurations using Xilinx iMPACT software and standard download cables.
5V-Tolerant I/O Pins
The 5V-tolerant inputs allow direct interfacing with legacy 5V systems while supporting modern 3.3V and 2.5V logic levels, ensuring backward compatibility in mixed-voltage designs.
XC18V01SO20I Ordering Information
| Part Number |
Package |
Temperature Grade |
Description |
| XC18V01SO20I |
SOIC-20 |
Industrial (-40°C to +85°C) |
1Mbit ISP Configuration PROM |
| XC18V01SO20C |
SOIC-20 |
Commercial (0°C to +70°C) |
1Mbit ISP Configuration PROM |
| XC18V01PC20I |
PLCC-20 |
Industrial (-40°C to +85°C) |
1Mbit ISP Configuration PROM |
Design Resources and Documentation
Engineers working with the XC18V01SO20I can access comprehensive design support materials, including detailed datasheets (DS026), application notes for FPGA configuration, programming guides for Xilinx iMPACT software, and reference schematics for various FPGA interface configurations.
XC18V01SO20I Summary
The XC18V01SO20I represents a proven solution for FPGA configuration storage in industrial applications. With its 1-Megabit density, 20,000-cycle endurance, 20-year data retention, and industrial temperature rating, this configuration PROM meets the demanding requirements of modern embedded systems. The combination of serial and parallel configuration modes, JTAG programmability, and cascadable architecture provides engineers with the flexibility needed for diverse FPGA-based designs.
