AMD XC1701SO20I

Overview

XC1701SO20I from AMD is a serial PROM configuration memory for Xilinx FPGA devices, providing 1 Mbit (128K × 8) storage in SOIC-20 package with 5V supply, 150 ns access time, and industrial temperature range (–40°C to +85°C), used in embedded reconfiguration of Spartan and Virtex families.

For engineers reviewing the XC1701SO20I datasheet, pinout, applications, or equivalent options, key selection criteria include voltage compatibility with target FPGA configuration interface, read timing alignment with FPGA startup sequence, SOIC-20 footprint constraints, and industrial-grade reliability for field-deployed systems.

Technical Context

This device implements a synchronous serial interface compatible with Xilinx FPGA master-mode configuration protocols, supporting both active serial (AS) and passive serial (PS) modes. It uses NMOS technology with TTL-compatible I/O and includes internal address counter and data latch for sequential read operation.

Configuration data is stored in non-volatile EPROM cells, enabling single-power-supply operation without external programming voltage. The device requires no external clock during read; timing is controlled by FPGA-generated CCLK signal.

Key Specifications

Pinout & Package

XC1701SO20I is housed in a 20-pin Small Outline Integrated Circuit (SOIC) package with 300-mil body width and 1.27 mm lead pitch. Pin numbering follows standard SOIC convention, with Pin 1 marked by notch or dot.

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, XC1701SO20I remains the only 5V-tolerant, SOIC-20 packaged option qualified for industrial temperature operation in legacy Xilinx FPGA systems requiring direct 5V interface compatibility.

Availability

XC1701SO20I is available at Aetrix Electronics and suitable for industrial PLCs, avionics data recorders, and medical imaging systems requiring stable component supply over extended production lifecycles.

Supply support for XC1701SO20I 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 oversees legacy Xilinx product lines including configuration PROMs. AMD is a global semiconductor leader focused on adaptive computing and high-performance logic solutions.

XC1701SO20I belongs to the Xilinx XC1700 family of serial configuration PROMs, designed specifically to support FPGA bitstream loading in industrial and aerospace systems where 5V interface compatibility and long-term supply stability are critical.

FAQ

What is the operating voltage range for XC1701SO20I?

The XC1701SO20I operates at a nominal supply voltage of 5.0 V with a tolerance of ±10%, meaning it functions reliably between 4.5 V and 5.5 V. This voltage range aligns precisely with the configuration I/O voltage requirements of legacy Xilinx Spartan and Virtex FPGAs. Using XC1701SO20I outside this range may cause read timing violations or data corruption during FPGA startup.

Does XC1701SO20I support both active and passive serial configuration modes?

Yes, XC1701SO20I supports both active serial (AS) and passive serial (PS) configuration modes as defined in Xilinx Application Note XAPP117. In AS mode, the FPGA generates CCLK and drives CE# and OE#; in PS mode, an external controller sequences the signals. XC1701SO20I's internal logic adapts automatically based on the control signal timing sequence applied during power-up.

Is XC1701SO20I pin-compatible with other devices in the XC1700 family?

XC1701SO20I shares the same SOIC-20 pinout and signal assignment with XC1702SO20I and XC1704SO20I, differing only in memory density (1 Mbit vs. 2 Mbit vs. 4 Mbit). All three use identical CE#, CCLK, DATA, and OE# pin functions and timing specifications, enabling layout reuse across bitstream size variants in the same FPGA design.

What is the maximum configuration clock (CCLK) frequency supported by XC1701SO20I?

XC1701SO20I supports a maximum CCLK frequency of 6.67 MHz, derived from its 150 ns access time specification. At this rate, the FPGA can reliably sample valid DATA on each rising CCLK edge. Exceeding this frequency risks setup/hold violations and incomplete bitstream loading, especially under worst-case industrial temperature conditions.

Can XC1701SO20I be reprogrammed in-system?

No, XC1701SO20I is a one-time programmable (OTP) EPROM device and cannot be erased or reprogrammed after initial programming. Programming requires a dedicated EPROM programmer applying 21 V to VPP pin (not present on SOIC-20 package), which is performed prior to system assembly. XC1701SO20I is intended for fixed, field-deployed configurations-not for development or iterative FPGA prototyping.