AMD XC17S40XLSO20C

Overview

XC17S40XLSO20C from AMD (formerly Xilinx) is a serial configuration PROM designed to store and load configuration bitstreams for Spartan-XL FPGAs. It provides 4 Mbit storage capacity, operates at 5 V supply voltage, supports 10 MHz read speed, and uses a 20-pin SOIC package. It is used in industrial control systems requiring reliable FPGA reconfiguration.

For engineers reviewing the XC17S40XLSO20C datasheet, pinout, applications, or equivalent options, key selection factors include 5 V compatibility, 4 Mbit density, SOIC-20 footprint, single-supply operation, and support for master-serial FPGA configuration mode.

Technical Context

This PROM implements a synchronous serial interface compatible with Xilinx Spartan-XL family configuration protocols. It features built-in power-on reset circuitry and supports both active-high and active-low chip select, enabling flexible integration into FPGA boot sequences.

It delivers deterministic read access time of 100 ns at 5 V and supports industrial temperature range (–40°C to +85°C), ensuring stable operation in embedded environments where FPGA configuration integrity is critical.

Key Specifications

Pinout & Package

XC17S40XLSO20C is housed in a 20-pin Small Outline Integrated Circuit (SOIC) package with 300 mil body width and standard gull-wing lead form. Pin assignments are defined per Xilinx DS029 specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC17S40XLSO20C, XCF04SVO20C and AT17LV40-10JU offer higher-density alternatives but require board-level voltage adaptation and lack guaranteed timing compliance with Spartan-XL configuration clocks, making XC17S40XLSO20C the only drop-in solution for existing 5 V industrial designs.

Availability

XC17S40XLSO20C is available at Aetrix Electronics and suitable for industrial PLCs, motor drive logic boards, and legacy communication gateways requiring stable component supply and long-term obsolescence management.

Supply support for XC17S40XLSO20C 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, inheriting its FPGA and configuration PROM portfolio. Xilinx pioneered SRAM-based FPGA architecture and associated configuration solutions.

The XC17S series was developed specifically to support Spartan-XL FPGAs with 5 V tolerant, serial bitstream loading - targeting cost-sensitive industrial and automation applications where reliability and pin compatibility were critical.

FAQ

What is the primary function of the XC17S40XLSO20C?

The XC17S40XLSO20C is a 4 Mbit serial configuration PROM designed exclusively to store and deliver configuration bitstreams to Spartan-XL family FPGAs. It operates at 5 V, uses a synchronous serial interface, and is qualified for industrial temperatures. The XC17S40XLSO20C enables autonomous FPGA startup without external controllers by directly driving the CCLK and DIN pins during power-up.

Does the XC17S40XLSO20C support 3.3 V operation?

No, the XC17S40XLSO20C is specified only for 5.0 V ±10% operation and is not rated for 3.3 V or lower supply voltages. Attempting to operate the XC17S40XLSO20C at 3.3 V may result in unreliable read timing, incomplete configuration loading, or failure to initialize Spartan-XL FPGAs. Systems requiring mixed-voltage support must use level-shifting or alternative PROMs like XCF04SVO20C with appropriate design validation.

Can the XC17S40XLSO20C be used with Spartan-3 FPGAs?

No, the XC17S40XLSO20C is not compatible with Spartan-3 FPGAs. It is specifically designed for Spartan-XL devices and lacks the voltage tolerance, timing parameters, and command set required by Spartan-3 configuration protocols. Using the XC17S40XLSO20C with Spartan-3 will result in failed configuration. For Spartan-3, XCF04SVO20C or equivalent is the correct PROM family.

What is the maximum clock frequency supported by the XC17S40XLSO20C interface?

The XC17S40XLSO20C supports a maximum read clock frequency of 10 MHz, corresponding to a minimum cycle time of 100 ns. This timing aligns precisely with the master-serial configuration requirements of Spartan-XL FPGAs. Exceeding 10 MHz violates the device's AC specifications and risks bitstream corruption during FPGA configuration - a constraint strictly defined in the XC17S40XLSO20C datasheet and verified across industrial temperature ranges.

Is the XC17S40XLSO20C RoHS compliant?

Yes, the XC17S40XLSO20C is RoHS compliant and meets EU Directive 2011/65/EU requirements for hazardous substances. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). This compliance applies to units manufactured after the Xilinx RoHS transition date and is documented in official AMD/Xilinx product change notices and material declarations.