AMD XC17S100ASO20I

Overview

XC17S100ASO20I from AMD (formerly Xilinx) is a serial PROM device designed for configuration storage of Spartan-2 FPGAs. It provides 100 kbit of reprogrammable memory in a 20-pin SOIC package, supports 3.3 V operation, and features a 33 MHz serial clock interface. It is used in industrial control systems requiring reliable FPGA bitstream loading at power-up.

For engineers reviewing the XC17S100ASO20I datasheet, pinout, applications, or equivalent options, key selection criteria include serial configuration interface speed, voltage compatibility with target FPGA, nonvolatile retention lifetime, and SOIC-20 footprint constraints in space-constrained PCB layouts.

Technical Context

The XC17S100ASO20I implements a synchronous serial interface compliant with Xilinx's proprietary configuration protocol for Spartan-2 devices. It uses CMOS EEPROM technology with data retention exceeding 20 years and endurance rated for 10,000 write cycles. The device operates across –40°C to +85°C and requires no external programming voltage.

It delivers deterministic configuration timing: t_PU (power-up delay) ≤ 100 μs, t_CO (data output hold) = 15 ns, and t_SK (clock-to-data skew) ≤ 5 ns. All timing parameters are specified at V_CC = 3.3 V ± 0.3 V and f_CLK = 33 MHz.

Key Specifications

Pinout & Package

Package: 20-pin Small Outline Integrated Circuit (SOIC), 300-mil body width, gull-wing leads, JEDEC MS-013AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XCF01SVO20C and AT17LV010-10JU, the XC17S100ASO20I offers guaranteed timing compliance and native protocol support for Spartan-2 FPGAs without firmware or hardware adaptation - critical for legacy system maintenance and cost-sensitive replacements.

Availability

XC17S100ASO20I is available at Aetrix Electronics and suitable for industrial automation, medical imaging subsystems, and avionics data acquisition units requiring stable component supply and long-term obsolescence management.

Supply support for XC17S100ASO20I 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 support, including configuration PROMs for discontinued FPGA families.

The XC17S100ASO20I belongs to the Xilinx XC17SxxA PROM family, engineered specifically to provide factory-programmed, pin-compatible configuration storage for Spartan-2 FPGAs in industrial and aerospace applications.

FAQ

Is XC17S100ASO20I compatible with Spartan-3 FPGAs?

No. The XC17S100ASO20I is electrically and protocol-specific to Spartan-2 FPGAs. Spartan-3 devices require XCFxxP or XCFxxS series PROMs with different command sets, timing, and voltage tolerances. Using XC17S100ASO20I with Spartan-3 will result in failed configuration or undefined behavior. Always verify FPGA family compatibility before selecting a configuration PROM.

What is the maximum supported clock frequency for XC17S100ASO20I during configuration?

The XC17S100ASO20I supports a maximum serial clock frequency of 33 MHz, as specified in the Xilinx DS026 datasheet. This limit ensures setup/hold timing margins for DOUT propagation and internal address counter advancement. Exceeding 33 MHz may cause bit errors or incomplete configuration, especially at temperature extremes or under voltage variation.

Does XC17S100ASO20I require an external programmer for initial programming?

Yes. The XC17S100ASO20I must be programmed using a dedicated Xilinx-compatible PROM programmer (e.g., Xilinx Platform USB Cable with iMPACT software) or third-party universal programmers supporting Xilinx XC17SxxA command sets. It cannot be programmed in-system by the target FPGA during normal operation.

Can XC17S100ASO20I be used in a 2.5 V system?

No. The XC17S100ASO20I is specified only for 3.3 V ± 0.3 V operation. Applying 2.5 V will result in insufficient internal voltage margin for EEPROM write/erase operations and unreliable read timing. It is not backward-compatible with 2.5 V Spartan-2 variants - those require XC17SxxL or XC17SxxLV parts.

What does the 'I' suffix in XC17S100ASO20I indicate?

The 'I' suffix in XC17S100ASO20I denotes Industrial temperature grade (–40°C to +85°C). This distinguishes it from the commercial-grade 'C' version (0°C to +70°C). The 'I' variant undergoes extended burn-in and parametric testing to ensure performance stability across the full industrial range, making it suitable for deployment in harsh environments where thermal cycling is expected.