EPC2LI20: A High-Performance Configuration PROM for Legacy FPGA Systems

The EPC2LI20 remains one of Intel's most trusted configuration memory solutions for Field-Programmable Gate Arrays (FPGAs), even after being classified as obsolete. This in-depth guide explores why engineers continue to specify this 1.6 Mbit PROM for critical applications requiring proven reliability and industrial-grade performance.

Technical Specifications and Features

Memory Architecture

• Capacity: 1.6 Megabit (200KB) organized for optimal FPGA configuration
• Programming: In-system programmable (ISP) via JTAG interface
• Endurance: 100+ programming cycles guaranteed

Power Characteristics

• Dual Voltage Support: 3.0-3.6V (low power) and 4.5-5.5V (standard)
• Active Current: 15mA typical at 5V operation
• Standby Current: <50 A for power-sensitive applications

Environmental Ratings

• Temperature Range: -40 C to +85 C (industrial grade)
• Humidity: 95% non-condensing
• Shock/Vibration: MIL-STD-883 compliant

Package and Pinout Details

The 20-PLCC package (9mm x 9mm) features:

• J-lead contacts for reliable surface mounting
• 0.5mm lead pitch for high-density PCBs
• Lead-free/RoHS compliant versions available
• Standard pinout compatible with Intel FPGA families

Common Applications

Industrial Control Systems

Used in programmable logic controllers (PLCs), motor drives, and process automation equipment where configuration persistence is critical.

Telecommunications

Provides firmware storage for base stations, network switches, and legacy communication gear.

Medical Equipment

Trusted in diagnostic imaging systems and patient monitors requiring fail-safe operation.

Military/Aerospace

Deployed in avionics and defense systems due to its extended temperature capability.

Migration and Replacement Options

While obsolete, these alternatives may be considered:

• EPC4 series for higher density requirements
• EPCS devices for modern Cyclone FPGAs
• Third-party flash memory with configuration emulation

Why Engineers Still Choose EPC2LI20

1. Proven Field Reliability: Millions of units deployed since introduction
2. Long-Term Availability: Still stocked by major distributors
3. Cost-Effective: Often more economical than redesigning for new parts
4. Known Behavior: No surprises in established designs

Design Considerations

When using EPC2LI20 in new designs:

• Allow for programming headers in PCB layout
• Implement proper decoupling (0.1 F ceramic near VCC)
• Follow Intel's termination guidelines for configuration signals
• Consider adding test points for programming verification

Purchasing and Support

Our inventory maintains stock of genuine Intel EPC2LI20 devices. We provide:

• Batch-traceable components
• Programming services
• Technical documentation package
• Design-in assistance

Contact our technical sales team for current availability and pricing. For legacy system support, we offer complete solutions including alternative component identification and lifecycle management.