AMD XC17S150ASO20I

Overview

XC17S150ASO20I from AMD (formerly Xilinx) is a serial configuration PROM designed to store and load bitstream data for Spartan-2 FPGAs. It provides 150 kbit of OTP memory, operates at 5 V, and supports serial read access with 10 MHz maximum clock frequency. It is used in FPGA-based industrial control systems requiring reliable, nonvolatile configuration storage.

For engineers reviewing the XC17S150ASO20I 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 compliant with Xilinx FPGA configuration protocols, using a single data line (DIN) and clock (CCLK) for bitstream loading. It requires no external address lines and relies on internal address counters incremented per clock cycle.

It features built-in power-on reset circuitry and data integrity verification via CRC check during configuration. The device lacks reprogrammability - once programmed, contents are permanently fixed and cannot be erased or rewritten.

Key Specifications

Pinout & Package

XC17S150ASO20I is housed in a 20-pin plastic small-outline (SO-20) package with standard 0.3 inch body width and 0.05 inch pin pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC17S150AFTG20C and XC17S100ASO20I, the XC17S150ASO20I offers direct SO-20 compatibility and full 150 kbit capacity - making it the only option that satisfies both legacy footprint constraints and mid-range Spartan-2 configuration requirements without compromise.

Availability

XC17S150ASO20I is available at Aetrix Electronics and suitable for industrial control, avionics data acquisition, and legacy test equipment requiring stable component supply and long-term obsolescence management.

Supply support for XC17S150ASO20I 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 legacy FPGA and configuration product portfolio. Xilinx originally developed this PROM family for seamless integration with its Spartan series.

The XC17SxxA family was engineered specifically to provide secure, low-pin-count, 5 V-compatible configuration storage for Spartan-2 FPGAs in cost-sensitive industrial and aerospace applications.

FAQ

Is XC17S150ASO20I reprogrammable?

No, XC17S150ASO20I is a one-time programmable (OTP) PROM. Once programmed, its contents cannot be erased or rewritten. This design ensures configuration integrity in mission-critical systems where accidental or malicious modification must be prevented. Programming is performed using compatible Xilinx programmers such as the XilinxBoundary-Scan or third-party devices supporting the XC17SxxA protocol. XC17S150ASO20I retains data indefinitely without power.

What FPGA families is XC17S150ASO20I compatible with?

XC17S150ASO20I is specifically designed for Spartan-2 FPGAs including XC2S15, XC2S30, XC2S50, and XC2S100. It is not compatible with Spartan-3, Virtex, or newer families due to differences in configuration protocol, voltage levels, and bitstream format. The device's 5 V supply and serial interface match Spartan-2's native configuration requirements. XC17S150ASO20I does not support JTAG-based configuration or partial reconfiguration.

Does XC17S150ASO20I require external pull-up resistors?

XC17S150ASO20I requires an external pull-up resistor on the CE (chip enable) pin to maintain active-high default state during FPGA configuration. A 4.7 kΩ resistor to VCC is recommended. No pull-ups are needed on CCLK or DIN, as these are actively driven by the FPGA. RESET may optionally use a pull-up for power-on initialization, though internal weak pull-up exists. XC17S150ASO20I datasheet specifies these values for reliable timing compliance.

Can XC17S150ASO20I operate at 3.3 V?

No, XC17S150ASO20I is specified only for 5.0 V ±10% operation. Its internal logic, output drivers, and programming circuitry are not rated for 3.3 V supply. Attempting to power XC17S150ASO20I at 3.3 V will result in undefined behavior, failed configuration, or permanent damage. For 3.3 V systems, Xilinx's XC18Vxx series or later platform-specific configuration solutions must be used instead of XC17S150ASO20I.

What is the maximum configuration clock frequency supported by XC17S150ASO20I?

XC17S150ASO20I supports a maximum CCLK frequency of 10 MHz, as specified in the official Xilinx datasheet DS029. This limit ensures proper setup and hold timing for internal shift register operation. Exceeding 10 MHz may cause bit errors or incomplete configuration. Typical configuration time for the full 150 kbit is approximately 19 ms at 10 MHz. XC17S150ASO20I does not support dynamic clock rate adjustment during load.