Meta Description (155 characters): XC17S40PD8C is a 40K-bit 5V serial configuration PROM by AMD Xilinx for Spartan FPGAs. 8-DIP package, OTP memory, 20-year data retention. Buy now!

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The XC17S40PD8C is a high-reliability one-time programmable (OTP) serial configuration PROM manufactured by AMD (formerly Xilinx). This 40,960-bit configuration memory IC is specifically designed to store configuration bitstreams for Xilinx FPGA devices in the Spartan and Spartan-XL families. Packaged in a compact 8-pin plastic DIP format, the XC17S40PD8C delivers a cost-effective and easy-to-use solution for FPGA configuration in commercial temperature applications.

XC17S40PD8C Product Overview

The XC17S40PD8C belongs to the XC17S series of configuration PROMs, which provide non-volatile storage for FPGA bitstreams. When power is applied to an FPGA system, the XC17S40PD8C automatically loads the stored configuration data into the target FPGA, enabling instant operation without external microcontroller intervention.

This configuration PROM supports both Master Serial and Slave Serial configuration modes, making it versatile for various system architectures. The device features a simple serial interface that requires only one user I/O pin on the FPGA side, minimizing design complexity and PCB footprint.

XC17S40PD8C Key Specifications

XC17S40PD8C Pinout Configuration

XC17S40PD8C Features and Benefits

High-Reliability Non-Volatile Storage

The XC17S40PD8C utilizes advanced low-power CMOS floating gate technology to achieve guaranteed 20-year data retention. This ensures your FPGA configuration remains intact throughout the product lifecycle, even in demanding industrial and commercial environments.

Simple FPGA Interface Design

Engineers appreciate the straightforward interface between the XC17S40PD8C and Spartan FPGAs. The serial configuration requires minimal connections, with the DATA output connecting directly to the FPGA’s DIN pin. This simplicity reduces design errors and accelerates time-to-market.

Flexible Configuration Modes

The XC17S40PD8C supports multiple FPGA configuration scenarios:

• Master Serial Mode: The FPGA generates the configuration clock, and the PROM responds with data on each clock edge
• Slave Serial Mode: An external clock source drives both the PROM and FPGA for synchronized configuration
• Daisy-Chain Configuration: Multiple XC17S40PD8C devices can be cascaded using the CEO output to configure larger FPGAs or multiple devices

Programmable Reset Polarity

The RESET/OE pin offers programmable polarity (active High or active Low), providing compatibility with different FPGA families and system requirements. This flexibility simplifies integration with existing designs.

XC17S40PD8C Electrical Characteristics

Compatible FPGA Devices

The XC17S40PD8C configuration PROM is optimized for use with Xilinx Spartan family FPGAs. The 40K-bit density is suitable for configuring smaller Spartan devices with configuration requirements up to 40,960 bits.

XC17S40PD8C Application Circuits

Typical Master Serial Configuration

In Master Serial mode, connect the XC17S40PD8C as follows:

• PROM DATA → FPGA DIN
• PROM CLK ← FPGA CCLK
• PROM RESET/OE ← FPGA INIT (with pull-up resistor)
• PROM CE ← FPGA DONE (active Low)
• PROM CEO → Next PROM CE (for cascading)

Design Considerations

When implementing the XC17S40PD8C in your design, consider these best practices:

1. Always connect both VCC pins (Pin 5 and Pin 6) to the 5V supply
2. Use appropriate decoupling capacitors near the power pins
3. Ensure proper power sequencing with the FPGA
4. Include pull-up resistor on RESET/OE line connected to FPGA INIT

XC17S40PD8C Ordering Information

Why Choose XC17S40PD8C for Your FPGA Design

The XC17S40PD8C offers several advantages for engineers designing with Spartan FPGAs:

• Cost-Effective Solution: Economical pricing for high-volume production
• Proven Reliability: Industry-standard configuration PROM with decades of field deployment
• Easy Programming: Compatible with leading third-party PROM programmers
• Compact Package: 8-pin DIP minimizes PCB real estate requirements
• Long-Term Availability: Supported product from AMD with established supply chain

Summary

The XC17S40PD8C is an essential component for any Spartan FPGA-based design requiring reliable, non-volatile configuration storage. With its 40K-bit OTP memory, 5V operation, simple serial interface, and 20-year data retention guarantee, this configuration PROM delivers the performance and reliability engineers demand. Whether you’re developing industrial control systems, embedded applications, or prototyping new designs, the XC17S40PD8C provides a proven solution for FPGA configuration needs.