The XC17S40XLPD8C is a high-reliability one-time programmable (OTP) configuration PROM manufactured by Xilinx (now AMD). This 400Kb serial configuration memory is specifically designed to store and load configuration bitstreams for Xilinx FPGA devices in the Spartan and Spartan-XL families. Housed in an 8-pin PDIP package, this 3.3V PROM delivers efficient, cost-effective FPGA configuration solutions for industrial, commercial, and embedded applications.
XC17S40XLPD8C Technical Specifications
Understanding the complete technical parameters of the XC17S40XLPD8C helps engineers select the right configuration memory for their FPGA designs. Below are the detailed specifications for this Xilinx configuration PROM.
General Product Information
| Specification |
Detail |
| Manufacturer Part Number |
XC17S40XLPD8C |
| Manufacturer |
Xilinx Inc. (AMD) |
| Product Category |
Memory – Configuration PROMs for FPGAs |
| Description |
IC PROM PROG C-TEMP 3.3V 8-DIP |
| Product Status |
Active |
| RoHS Status |
Compliant |
XC17S40XLPD8C Memory and Electrical Specifications
| Parameter |
Value |
| Memory Size |
400Kb (400,000 bits) |
| Memory Type |
OTP (One-Time Programmable) |
| Supply Voltage |
3.0V to 3.6V (3.3V nominal) |
| Interface Type |
Serial |
| Data Output |
Single Data Line (D0) |
| Configuration Clock |
Up to 10 MHz |
Operating Conditions and Package Details
| Attribute |
Specification |
| Operating Temperature |
0°C to +70°C (Commercial) |
| Package Type |
8-PDIP |
| Package Dimensions |
0.300″ (7.62mm) Width |
| Pin Count |
8 |
| Mounting Type |
Through-Hole |
| Moisture Sensitivity Level |
Not Applicable |
XC17S40XLPD8C Key Features and Benefits
The XC17S40XLPD8C configuration PROM offers several advantages that make it ideal for Spartan-XL FPGA applications.
Simple FPGA Interface Design
This configuration PROM requires only one user I/O pin connection to the FPGA, significantly simplifying PCB layout and reducing component count. The serial interface minimizes routing complexity while maintaining reliable data transfer during the configuration process.
Cascadable Architecture for Larger Configurations
Multiple XC17S40XLPD8C devices can be cascaded using the CEO (Chip Enable Output) to CE (Chip Enable) daisy-chain connection. This cascadable design allows engineers to store longer configuration bitstreams or multiple design configurations across several PROMs.
Programmable Reset Polarity
The XC17S40XLPD8C features programmable reset polarity (active High or active Low) to ensure compatibility with different FPGA reset requirements. This flexibility simplifies integration with various Spartan and Spartan-XL device configurations.
Low-Power CMOS Technology
Built using low-power CMOS floating-gate process technology, the XC17S40XLPD8C minimizes power consumption during both configuration and standby modes. This makes it suitable for power-sensitive portable and battery-operated applications.
Guaranteed Long-Term Data Retention
Xilinx guarantees 20-year data retention for the XC17S40XLPD8C, ensuring reliable configuration storage throughout the product lifecycle of your embedded system or industrial equipment.
XC17S40XLPD8C Pinout Configuration
| Pin Number |
Pin Name |
Description |
| 1 |
RESET/OE |
Reset/Output Enable (Active Low) |
| 2 |
CLK |
Clock Input |
| 3 |
DATA |
Serial Data Output |
| 4 |
CEO |
Chip Enable Output (for cascading) |
| 5 |
GND |
Ground |
| 6 |
CE |
Chip Enable Input (Active Low) |
| 7 |
VCC |
Power Supply (3.3V) |
| 8 |
VCC |
Power Supply (3.3V) |
Important Note: Both VCC pins (Pin 7 and Pin 8) must be connected together for proper device operation.
Compatible Xilinx FPGA Devices
The XC17S40XLPD8C is optimized to configure the following Xilinx FPGA families.
Supported FPGA Families
| FPGA Family |
Configuration Support |
| Spartan |
Full Support |
| Spartan-XL |
Full Support (3.3V Optimized) |
The 400Kb memory capacity of the XC17S40XLPD8C adequately stores configuration bitstreams for small to medium-density Spartan and Spartan-XL FPGAs, making it an economical choice for cost-sensitive applications.
XC17S40XLPD8C Configuration Modes
Master Serial Mode Configuration
In Master Serial mode, the Spartan or Spartan-XL FPGA generates the configuration clock (CCLK) that drives the XC17S40XLPD8C. After a short access time following the rising clock edge, configuration data appears on the PROM DATA output pin connected to the FPGA DIN pin. The FPGA automatically generates the appropriate number of clock pulses to complete configuration.
Slave Serial Mode Configuration
When operating in Slave Serial mode, both the XC17S40XLPD8C PROM and the target FPGA receive clock signals from an external source. This mode provides flexibility for system-level timing control and synchronization with other configuration devices.
XC17S40XLPD8C Part Number Decoder
Understanding the Xilinx part numbering system helps identify device variants and specifications.
| Code Segment |
Meaning |
| XC17S |
Xilinx Configuration PROM for Spartan Family |
| 40 |
Memory Density (400Kb) |
| XL |
Low-Voltage Version (3.3V) |
| PD |
Package Type (Plastic DIP) |
| 8 |
Pin Count |
| C |
Temperature Grade (Commercial: 0°C to +70°C) |
Related Part Numbers
| Part Number |
Voltage |
Temperature Range |
Package |
| XC17S40XLPD8C |
3.3V |
0°C to +70°C |
8-PDIP |
| XC17S40XLPD8I |
3.3V |
-40°C to +85°C |
8-PDIP |
| XC17S40PD8C |
5V |
0°C to +70°C |
8-PDIP |
| XC17S40PD8I |
5V |
-40°C to +85°C |
8-PDIP |
| XC17S40XLSO20C |
3.3V |
0°C to +70°C |
20-SOIC |
XC17S40XLPD8C Typical Applications
The XC17S40XLPD8C configuration PROM serves diverse industrial and commercial applications.
Industrial Automation and Control
Programmable logic controllers, motor drives, and industrial automation equipment utilize the XC17S40XLPD8C for reliable FPGA configuration in demanding factory environments.
Telecommunications Equipment
Network switches, routers, and telecommunications infrastructure benefit from the compact 8-pin package and reliable configuration storage of this PROM.
Consumer Electronics
Cost-sensitive consumer products requiring FPGA-based processing leverage the XC17S40XLPD8C for economical configuration memory solutions.
Embedded Systems Development
Embedded system designers choose the XC17S40XLPD8C for prototyping and production of Spartan-XL based designs requiring permanent configuration storage.
Programming and Development Tools
Software Support
The XC17S40XLPD8C is programmed using Xilinx ISE Foundation or ISE WebPACK software. These development environments compile FPGA design files into standard HEX format files compatible with commercial PROM programmers.
Programmer Compatibility
Leading PROM programmer manufacturers support the XC17S40XLPD8C, enabling straightforward production programming and prototyping workflows.
XC17S40XLPD8C Ordering Information
When ordering the XC17S40XLPD8C, verify the complete part number to ensure correct voltage, temperature grade, and package specifications for your application requirements.
| Order Code |
Description |
| XC17S40XLPD8C |
400Kb 3.3V PROM, Commercial Temp, 8-PDIP |
Summary
The XC17S40XLPD8C delivers reliable, cost-effective configuration memory for Xilinx Spartan and Spartan-XL FPGA devices. With 400Kb storage capacity, 3.3V operation, cascadable architecture, and guaranteed 20-year data retention, this 8-pin PDIP configuration PROM meets the demands of industrial, commercial, and embedded applications requiring dependable FPGA configuration solutions.
