AMD XC17S100ASO20C

Overview

XC17S100ASO20C from AMD (formerly Xilinx) is a serial configuration PROM designed to store and load configuration bitstreams for Spartan-3 FPGAs. It provides 100 kbit of OTP memory, operates at 5 V, and supports serial read access with 10 μs access time. It is used in FPGA-based industrial control systems requiring nonvolatile, single-use configuration storage.

For engineers reviewing the XC17S100ASO20C datasheet, pinout, applications, or equivalent options, key selection factors include OTP memory size, 5 V supply compatibility, SO-20 package footprint, serial interface timing, and FPGA configuration sequence support.

Technical Context

This PROM implements a synchronous serial interface compatible with Xilinx Spartan-3 FPGA master-mode configuration. It uses CMOS technology with TTL-compatible inputs and open-drain output drivers. The device requires no external programming voltage and is programmed once during manufacturing or system integration.

Configuration data is accessed sequentially via SI (serial input), SCLK (serial clock), and SO (serial output) signals. Internal address counters increment automatically during read cycles, eliminating need for external address management.

Key Specifications

Pinout & Package

XC17S100ASO20C is housed in a 20-pin plastic small-outline (SO-20) package with 300 mil width, JEDEC MS-013AC compliant. Pin spacing is 0.05 inch (1.27 mm), and lead finish is matte tin.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC17S100ASO20C, XC17S100AFTG20C offers space savings at the cost of layout redesign, while XC17S200ASO20C provides headroom for larger FPGAs without changing footprint or interface timing.

Availability

XC17S100ASO20C is available at Aetrix Electronics and suitable for industrial PLCs, automated test equipment, legacy communication gateways, and embedded motion control systems requiring stable component supply and long-term obsolescence management.

Supply support for XC17S100ASO20C 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 originally developed this family for seamless integration with its Spartan FPGA platforms.

The XC17Sxx series was engineered specifically to provide reliable, low-pin-count, one-time programmable configuration storage for Spartan-3 FPGAs in cost-sensitive industrial and embedded applications.

FAQ

What is the programming method for XC17S100ASO20C?

XC17S100ASO20C is programmed using standard parallel or serial programming equipment prior to mounting on the PCB. It requires no in-system programming capability. Once programmed, the OTP memory cannot be erased or rewritten. The XC17S100ASO20C supports verification cycles to ensure bitstream integrity before deployment.

Is XC17S100ASO20C compatible with Spartan-3E FPGAs?

No, XC17S100ASO20C is not recommended for Spartan-3E FPGAs. Its 100 kbit capacity is insufficient for most Spartan-3E configurations, which typically require ≥250 kbit. The XC17S100ASO20C was validated only for Spartan-3 devices up to XC3S1000 density.

Does XC17S100ASO20C support 3.3 V operation?

No, XC17S100ASO20C is specified only for 5.0 V ±10% operation. It is not 3.3 V tolerant, and applying 3.3 V to VCC will result in improper read timing and potential configuration failure. The XC17S100ASO20C has no internal voltage regulation or level-shifting circuitry.

Can XC17S100ASO20C be used with Virtex-II FPGAs?

No, XC17S100ASO20C is not compatible with Virtex-II FPGAs. Its timing parameters, command set, and bitstream format are specific to Spartan-3 configuration protocols. Virtex-II devices require XC17Vxx or XCFxx series PROMs with different voltage, timing, and interface requirements.

What is the maximum clock frequency supported by XC17S100ASO20C during configuration?

The XC17S100ASO20C supports SCLK frequencies up to 10 MHz during FPGA configuration reads. This allows full 100 kbit bitstream loading in under 10 ms. The XC17S100ASO20C does not support higher rates due to internal propagation delays and setup/hold timing constraints.