AMD XC17S40XLPD8I

Overview

XC17S40XLPD8I from AMD (formerly Xilinx) is a serial PROM device designed to configure Spartan-XL FPGAs. It provides 4 Mbit storage capacity, operates at 3.3 V supply, supports 10 MHz read speed, and features industrial temperature range (–40°C to +85°C). It is used in legacy FPGA configuration circuits for telecom line cards and industrial control modules.

For engineers reviewing the XC17S40XLPD8I datasheet, pinout, applications, or equivalent options, key selection criteria include configuration interface compatibility with Spartan-XL devices, data retention lifetime, programming voltage tolerance, and industrial-grade thermal reliability.

Technical Context

This PROM implements a synchronous serial interface compatible with Xilinx Spartan-XL family configuration protocols. It uses CMOS EEPROM technology with 100,000 program/erase cycles and 20-year data retention at 85°C. The device requires no external clock during configuration load.

It supports both master and slave configuration modes via dedicated /PROGRAM and /INIT pins. Configuration data is loaded on the rising edge of CCLK, with /CS enabling serial access and /WRITE controlling write protection state.

Key Specifications

Pinout & Package

XC17S40XLPD8I is housed in an 8-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA configuration memory applications.

Compared with XC17S40XLPD8C and XC17S40XLPD20I, the XC17S40XLPD8I uniquely balances industrial temperature compliance with through-hole manufacturability-making it optimal for legacy repair, field-serviceable modules, and mixed-technology PCBs where DIP sockets are retained.

Availability

XC17S40XLPD8I is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics test equipment requiring stable component supply over extended product lifecycles.

Supply support for XC17S40XLPD8I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

AMD acquired Xilinx in 2022 and maintains legacy programmable logic product lines including configuration PROMs, FPGAs, and associated development tools.

The XC17S40XLPD8I belongs to the Xilinx Spartan-XL Configuration PROM family, engineered specifically to provide reliable, single-supply, nonvolatile bitstream storage for Spartan-XL series FPGAs in industrial and telecom applications.

FAQ

What is the primary function of the XC17S40XLPD8I in a Spartan-XL FPGA system?

The XC17S40XLPD8I serves as the nonvolatile configuration memory that loads the FPGA bitstream upon power-up. It delivers verified configuration data to the Spartan-XL FPGA via a synchronous serial interface, ensuring deterministic initialization without external microcontroller intervention. The XC17S40XLPD8I is essential for autonomous FPGA startup in systems like telecom line cards and industrial PLCs where reliability and repeatability are critical.

Does the XC17S40XLPD8I support in-system programming?

Yes, the XC17S40XLPD8I supports in-system programming via its DIN and /PROGRAM pins using standard Xilinx programming hardware such as the Xilinx Parallel Cable III or third-party JTAG adapters with PROM programming capability. The XC17S40XLPD8I requires no special voltage sequencing during programming, and its 100,000-cycle endurance allows for repeated field updates without hardware replacement.

Can the XC17S40XLPD8I be used with newer Xilinx FPGA families like Spartan-3 or Artix-7?

No, the XC17S40XLPD8I is electrically and protocol-specific to the Spartan-XL family and is not compatible with Spartan-3, Spartan-6, or Artix-7 FPGAs. These later families use different configuration architectures, voltage levels, and bitstream formats. Using the XC17S40XLPD8I with non-Spartan-XL devices will result in failed configuration or hardware damage. Always verify FPGA-family alignment before selecting the XC17S40XLPD8I.

What is the role of the /INIT pin on the XC17S40XLPD8I?

The /INIT pin on the XC17S40XLPD8I is an open-drain status output that signals FPGA readiness to receive configuration data. It goes active-low when the FPGA completes internal power-on reset and asserts /INIT as a handshake signal to synchronize bitstream loading. This pin is critical for robust configuration sequencing in systems where timing margins are tight, such as in avionics test equipment using the XC17S40XLPD8I.

Is the XC17S40XLPD8I RoHS compliant?

Yes, the XC17S40XLPD8I is RoHS compliant and meets Directive 2011/65/EU requirements for restriction of hazardous substances. Lead-free terminations and halogen-free molding compound are used in its PDIP packaging. Compliance documentation-including test reports and material declarations-is available from AMD's official product support portal for the XC17S40XLPD8I.