AMD XC17S40PD8I

Overview

XC17S40PD8I from AMD (formerly Xilinx) is a serial PROM device designed to configure Spartan-3 FPGAs. It provides 4 Mbit storage capacity, operates at 5.0 V supply voltage, supports read access time of 15 ns, and features industrial temperature range (–40°C to +85°C). It is used in FPGA-based industrial control systems requiring nonvolatile configuration storage.

For engineers reviewing the XC17S40PD8I datasheet, pinout, applications, or equivalent options, key selection considerations include configuration voltage compatibility with Spartan-3 devices, read timing compliance, industrial-grade temperature operation, and 8-pin DIP package constraints.

Technical Context

This PROM implements a synchronous serial interface compatible with Xilinx Spartan-3 configuration protocols. It uses CMOS technology, includes built-in power-on reset circuitry, and supports boundary-scan testing via IEEE 1149.1 (JTAG) when used in-system with compatible FPGA configuration controllers.

The device requires no external programming voltage - programming is performed at VCC = 5.0 V. Data retention exceeds 20 years under specified operating conditions, and endurance is rated for 10,000 write/erase cycles.

Key Specifications

Pinout & Package

XC17S40PD8I is housed in an 8-pin plastic dual in-line package (PDIP) with 0.3-inch body width and 0.1-inch pin pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC17S40PD8I, XCF04SVO20C offers modern packaging and lower voltage but demands system-level adaptation, while XC17S40D8C reduces cost and qualification scope at the expense of thermal robustness - making XC17S40PD8I the sole choice for industrial-grade 5 V Spartan-3 configuration.

Availability

XC17S40PD8I is available at Aetrix Electronics and suitable for industrial control, test instrumentation, medical imaging subsystems, and avionics data acquisition modules requiring stable component supply across extended product lifecycles.

Supply support for XC17S40PD8I 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 continues to support legacy configuration PROM families including the XC17S series for Spartan FPGA platforms.

The XC17S family was developed specifically to provide reliable, single-supply, nonvolatile configuration storage for Spartan-series FPGAs in industrial and embedded applications.

FAQ

What is the primary function of the XC17S40PD8I in an FPGA-based system?

The XC17S40PD8I serves as a nonvolatile configuration PROM that stores and delivers the bitstream to Spartan-3 FPGAs during power-up. It operates at 5.0 V, provides 4 Mbit capacity, and ensures deterministic initialization without external controllers. The XC17S40PD8I is electrically and timing-compatible with Spartan-3 configuration protocols, making it a purpose-built solution for this FPGA family.

Does the XC17S40PD8I support in-system programming?

Yes, the XC17S40PD8I supports in-system programming via its WE, CE, and OE control pins using standard 5.0 V programming algorithms. It does not require elevated programming voltages. Programming is typically performed through a JTAG chain or dedicated PROM programmer, and the XC17S40PD8I retains data for up to 20 years under industrial temperature conditions.

Can the XC17S40PD8I be used with Spartan-6 or 7-series FPGAs?

No, the XC17S40PD8I is not compatible with Spartan-6 or 7-series FPGAs. It is specifically designed for Spartan-3 devices and uses a legacy configuration protocol and voltage domain. Newer FPGAs require XCFxx or platform flash devices with different pinouts, timing, and command sets. Using XC17S40PD8I with incompatible FPGAs will result in failed configuration.

What is the significance of the 'PD8' suffix in XC17S40PD8I?

The 'PD8' suffix denotes an 8-pin plastic dual in-line package (PDIP) with 0.3-inch width. The 'I' indicates industrial temperature grade (–40°C to +85°C). This distinguishes XC17S40PD8I from commercial variants like XC17S40D8C and surface-mount alternatives such as XCF04SVO20C. The package enables through-hole prototyping and legacy board compatibility.

Is JTAG boundary-scan supported directly by the XC17S40PD8I?

The XC17S40PD8I itself does not implement IEEE 1149.1 boundary-scan logic. However, it supports JTAG-based programming and verification when interfaced with a Spartan-3 FPGA acting as a JTAG master. The XC17S40PD8I responds to JTAG commands issued through the FPGA's TAP controller, enabling system-level test and configuration validation without additional hardware.