The XC17S40PD8I is a high-reliability one-time programmable (OTP) configuration PROM manufactured by Xilinx (now AMD). This industrial-grade serial PROM is specifically designed to store and deliver configuration bitstreams for Spartan and Spartan-XL FPGA devices. With its compact 8-pin DIP package, 5V operation, and extended industrial temperature range, the XC17S40PD8I provides a robust solution for demanding embedded applications.

XC17S40PD8I Key Specifications Overview

XC17S40PD8I Features and Benefits

One-Time Programmable Configuration Memory

The XC17S40PD8I utilizes OTP EPROM cell technology, providing secure and permanent storage of Xilinx FPGA configuration data. Once programmed, the bitstream cannot be altered, ensuring data integrity and protecting intellectual property in production environments.

Simple Serial Interface Design

This configuration PROM features an efficient serial interface that minimizes PCB complexity. The XC17S40PD8I requires only one user I/O pin connection to the target Spartan FPGA, reducing board space requirements and simplifying routing.

Programmable Reset Polarity

Engineers can configure the reset polarity as either active-High or active-Low. This flexibility allows seamless integration with different FPGA initialization sequences and system reset architectures.

Industrial Temperature Performance

The “I” suffix in XC17S40PD8I indicates industrial temperature qualification. This device operates reliably across the full -40°C to +85°C range, making it suitable for automotive, industrial automation, and outdoor equipment applications.

XC17S40PD8I Electrical Characteristics

XC17S40PD8I Pin Configuration

Compatible Spartan FPGA Devices

The XC17S40PD8I is optimized for configuring the XCS40 Spartan FPGA, which requires 329,312 configuration bits. The 440 Kbit capacity provides adequate storage with margin for the complete bitstream.

XC17S40PD8I Configuration Modes

Master Serial Mode Configuration

In Master Serial mode, the Spartan FPGA generates the configuration clock (CCLK) that drives the XC17S40PD8I. Data appears on the PROM DATA output pin after each rising clock edge, connecting directly to the FPGA DIN pin. The FPGA automatically generates the required clock pulses to complete configuration.

Slave Serial Mode Configuration

When operating in Slave Serial mode, both the XC17S40PD8I and the target Spartan FPGA receive clock signals from an external source. This mode enables synchronized multi-device configuration scenarios.

XC17S40PD8I Application Areas

The industrial-grade XC17S40PD8I configuration PROM serves critical applications including:

• Industrial automation and control systems
• Telecommunications equipment
• Medical device instrumentation
• Automotive electronics systems
• Military and aerospace applications
• Test and measurement equipment
• Embedded computing platforms

XC17S40PD8I Ordering Information

Data Retention and Reliability

The XC17S40PD8I guarantees 20-year data retention under normal operating conditions. The OTP technology ensures configuration data remains stable throughout the product lifecycle, eliminating concerns about data corruption or accidental erasure.

Programming Support for XC17S40PD8I

The XC17S40PD8I can be programmed using Xilinx ISE Foundation or ISE WebPACK software. These development tools compile FPGA design files into standard HEX format, which is then transferred to compatible third-party PROM programmers for device programming.

Conclusion

The XC17S40PD8I delivers proven reliability for Spartan FPGA configuration in demanding industrial environments. Its combination of adequate memory density, extended temperature range, simple interface, and guaranteed data retention makes it an excellent choice for production applications requiring secure, permanent FPGA configuration storage.