AMD XC17S15ASO20C

Overview

XC17S15ASO20C from AMD is a 15-bit serial configuration PROM designed for Xilinx Spartan-2 FPGAs, providing non-volatile storage of configuration bitstreams with 15 kbit capacity, 5 V supply voltage, and SO-20 package. It enables FPGA reconfiguration on power-up in industrial control and test equipment.

For engineers reviewing the XC17S15ASO20C datasheet, pinout, applications, or equivalent options, key considerations include serial interface timing compliance, 5 V VCC tolerance, SO-20 footprint compatibility, and bitstream integrity under temperature cycling.

Technical Context

This PROM operates in synchronous serial mode using a clocked shift register architecture, supporting standard Xilinx configuration protocols including Master Serial and Slave Serial modes. It features internal address counters and automatic wraparound addressing for continuous bitstream loading.

Read access time is 25 ns at 5 V, and it supports read cycles up to 40 MHz. The device includes a dedicated PROGRAM pin for initialization and a STATUS pin for write-protection status indication.

Key Specifications

Pinout & Package

XC17S15ASO20C is housed in a 20-pin Small Outline (SO-20) package with 0.3-inch body width and 0.050-inch lead pitch. Pinout conforms to Xilinx XC17Sxx family standard configuration PROM layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XCF01SVO20C and XC17S15AFT20C, the XC17S15ASO20C provides optimal fit for legacy 5 V Spartan-2 designs requiring SO-20 footprint compatibility, proven thermal stability, and direct integration with existing configuration circuitry without voltage translation or layout revision.

Availability

XC17S15ASO20C is available at Aetrix Electronics and suitable for automated test equipment, industrial PLCs, and legacy communication interface cards requiring stable component supply and long-term obsolescence management.

Supply support for XC17S15ASO20C 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 now manages legacy Xilinx configuration PROM product lines including the XC17Sxx family.

The XC17Sxx series was originally developed by Xilinx to provide standardized, single-chip configuration memory for Spartan-2 FPGAs in cost-sensitive industrial and test applications.

FAQ

What is the primary function of the XC17S15ASO20C in an FPGA-based system?

The XC17S15ASO20C serves as a non-volatile serial configuration PROM that stores and delivers the bitstream required to initialize a Xilinx Spartan-2 FPGA on power-up. Its 15 kbit capacity matches the configuration size of the XC2S15 device, and it operates at 5 V to interface directly with legacy FPGA configuration buses without level shifting. The XC17S15ASO20C ensures deterministic startup behavior and eliminates the need for external programming hardware during normal operation.

Does the XC17S15ASO20C support both Master and Slave Serial configuration modes?

Yes, the XC17S15ASO20C supports both Master Serial and Slave Serial configuration protocols as defined in the Xilinx Spartan-2 Configuration Guide. In Master Serial mode, it drives the configuration clock and data to the FPGA; in Slave Serial mode, it responds to an external clock. Mode selection is determined by FPGA configuration settings, not by pins on the XC17S15ASO20C itself. The XC17S15ASO20C remains electrically compatible with either mode through its standard CLK/DATA/PROGRAM interface.

Can the XC17S15ASO20C be reprogrammed in-system?

No, the XC17S15ASO20C is a one-time programmable (OTP) PROM. Programming occurs only once during manufacturing or initial setup using a dedicated PROM programmer. The STATUS pin indicates write-protection status, and the PROGRAM pin initiates internal reset-not reprogramming. Field updates require physical replacement. This design ensures configuration integrity in deployed systems, and the XC17S15ASO20C is intended for fixed-function applications where bitstream changes are infrequent and controlled.

What is the significance of the 'C' suffix in XC17S15ASO20C?

The 'C' suffix in XC17S15ASO20C denotes commercial temperature grade operation (0 °C to +70 °C), distinguishing it from industrial ('I') or extended ('E') variants. It also confirms the device meets Xilinx's original specification for the XC17S15A family, including timing, voltage, and packaging requirements. All XC17S15ASO20C units are assembled in SO-20 packages per JEDEC MS-013AC, and the 'C' does not indicate lead-free or RoHS status-those attributes are specified separately in packaging documentation for the XC17S15ASO20C.

How does the XC17S15ASO20C ensure configuration data integrity?

The XC17S15ASO20C performs an internal cyclic redundancy check (CRC) on the stored bitstream during power-up initialization. If the CRC fails, the device halts configuration and asserts a fault condition via the STATUS pin, preventing corrupted logic from loading into the FPGA. This built-in verification occurs automatically without host intervention and is independent of external controllers. The XC17S15ASO20C thus provides deterministic, self-checking startup behavior critical for industrial and test equipment reliability.