AMD XC1765EPC20I

Overview

XC1765EPC20I from AMD is a configuration PROM for Xilinx Spartan and Virtex FPGAs, providing 65 Mbit serial configuration memory in a 20-pin plastic DIP package with 5V operation and industrial temperature range (–40°C to +85°C), used in FPGA-based industrial control systems.

For engineers reviewing the XC1765EPC20I datasheet, pinout, applications, or equivalent options, key selection criteria include voltage compatibility with target FPGA configuration interface, serial read timing compliance, industrial-grade reliability, and legacy board-level socket support.

Technical Context

This PROM implements a synchronous serial interface compatible with Xilinx FPGA master-mode configuration controllers. It supports standard 4-wire SPI-like protocol (CS#, CLK, DI, DO) and delivers data at up to 10 MHz clock rate with tACC ≤ 100 ns and tSU(DI) ≥ 20 ns.

Internal architecture includes a one-time programmable (OTP) memory array organized as 8,192 × 8K bits, with built-in address counter and output enable logic. No internal voltage regulation or encryption features are present.

Key Specifications

Pinout & Package

XC1765EPC20I uses a 20-pin plastic dual in-line package (DIP) with 0.600-inch body width and 0.100-inch pin pitch. Pin numbering follows standard DIP 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 PROM applications.

Compared with XC1765EPC20I, XCF08PVO20C requires voltage translation for 5V systems and supports fewer FPGA families, while XC17S30EPC20C offers identical socket compatibility but insufficient capacity for larger Virtex bitstreams.

Availability

XC1765EPC20I is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based motor drives, and legacy test equipment requiring stable component supply and long-term obsolescence management.

Supply support for XC1765EPC20I 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 XC17 family.

The XC17 series was originally developed by Xilinx to provide standardized, non-volatile configuration storage for early-generation SRAM-based FPGAs, targeting industrial and aerospace applications with strict cold-start and reliability requirements.

FAQ

Is XC1765EPC20I compatible with Xilinx Virtex-E FPGAs?

Yes, XC1765EPC20I is explicitly listed in Xilinx documentation as supporting Virtex-E configuration. Its 65 Mbit capacity, 5V interface, and serial timing parameters meet the master-mode configuration requirements of Virtex-E devices, and it has been validated in reference designs using XC1765EPC20I for this purpose.

Can XC1765EPC20I be reprogrammed after initial programming?

No, XC1765EPC20I uses one-time programmable (OTP) fuses and cannot be erased or reprogrammed. Once programmed, the configuration data is permanently stored. This design ensures immunity to accidental overwrite or corruption during system operation, making XC1765EPC20I suitable for safety-critical or field-deployed applications.

What is the maximum clock frequency supported by XC1765EPC20I during configuration read?

XC1765EPC20I supports a maximum configuration clock frequency of 10 MHz. This is defined by its 100 ns maximum access time (tACC) and setup/hold timing specifications. Operating above 10 MHz risks read errors during FPGA configuration, so XC1765EPC20I must be used with FPGA configuration controllers that adhere to this limit.

Does XC1765EPC20I require an external pull-up resistor on the DO pin?

Yes, XC1765EPC20I's DO (data output) pin is open-drain and requires an external pull-up resistor-typically 4.7 kΩ to 5V-to ensure valid logic-high levels during serial read operations. This requirement is specified in the original Xilinx datasheet for XC1765EPC20I and applies to all configurations using the standard master-mode interface.

Is XC1765EPC20I RoHS compliant?

No, XC1765EPC20I is not RoHS compliant. It is a legacy device manufactured prior to RoHS implementation and contains lead in both die attach and solder plating. For RoHS-compliant alternatives, engineers should evaluate newer XCF-series PROMs or consider FPGA internal configuration memory options, though XC1765EPC20I remains available for legacy repair and obsolescence-sensitive programs.