AMD XC1765ELPD8I

Overview

XC1765ELPD8I from AMD is a 65K-bit serial PROM configured for Xilinx FPGA configuration, operating at 5V supply, supporting 10 MHz read speed, and housed in an 8-pin PDIP package. It serves as non-volatile configuration memory for Spartan and Virtex family FPGAs in industrial control and test equipment.

For engineers reviewing the XC1765ELPD8I datasheet, pinout, applications, or equivalent options, key selection considerations include VCC compatibility with legacy 5V FPGA configuration interfaces, PDIP-8 footprint constraints, and guaranteed 100,000 write/erase cycles for field-upgradable systems.

Technical Context

This device implements a serial shift-register architecture with synchronous clocked data access, using a single bidirectional DATA pin and dedicated CE# and OE# control inputs. It supports standard SPI-compatible read sequences and requires no external address decoding logic.

The XC1765ELPD8I uses NMOS floating-gate technology with on-chip charge-pump programming, enabling in-system reprogramming via standard FPGA configuration controllers. Its timing adheres to Xilinx XAPP049 and XAPP050 application notes for PROM-based configuration.

Key Specifications

Pinout & Package

Package: 8-pin plastic dual in-line package (PDIP), 0.3-inch body width, through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC1765D8I, the XC1765ELPD8I offers higher endurance and proven compatibility with legacy Xilinx configuration controllers, while the 25LC640-I/P introduces software overhead but enables incremental bitstream updates.

Availability

XC1765ELPD8I is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based test equipment, and avionics ground support units requiring stable component supply and long-lifecycle support.

Supply support for XC1765ELPD8I 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 (Advanced Micro Devices) is a U.S.-based semiconductor company specializing in high-performance computing, adaptive SoCs, and programmable logic solutions.

The XC17xxx series was developed by AMD's programmable logic division to provide cost-effective, pin-compatible configuration memory for Xilinx FPGA families prior to AMD's acquisition of Xilinx.

FAQ

What is the primary function of the XC1765ELPD8I in FPGA-based systems?

The XC1765ELPD8I serves as a serial configuration PROM that stores and delivers the bitstream to initialize Xilinx Spartan and Virtex family FPGAs at power-up. It operates in a synchronous serial mode using CLK, CE#, OE#, and DATA pins. The XC1765ELPD8I ensures reliable, repeatable FPGA configuration without external microcontrollers or complex boot logic.

Does the XC1765ELPD8I support in-system programming?

Yes, the XC1765ELPD8I supports in-system reprogramming via its synchronous serial interface, allowing field updates of FPGA configuration data without removing the device from the PCB. Programming requires a 5V supply and adherence to AMD's specified voltage ramp and timing requirements. The XC1765ELPD8I retains full functionality after up to 100,000 write/erase cycles.

Can the XC1765ELPD8I be used with modern Xilinx 7-series FPGAs?

No, the XC1765ELPD8I is not compatible with 7-series FPGAs due to differences in configuration protocols, voltage requirements (1.8V/2.5V vs. 5V), and bitstream format. It is specifically designed for legacy Xilinx devices such as XC4000, Spartan-XL, and early Virtex families. For newer FPGAs, refer to Xilinx's current configuration PROM recommendations instead of the XC1765ELPD8I.

What is the significance of the 'LP' in XC1765ELPD8I?

The 'LP' in XC1765ELPD8I denotes Low Power - indicating this variant features reduced active and standby current versus earlier XC1765E versions, while maintaining full 5V operation and PDIP-8 packaging. This designation reflects AMD's optimization for industrial applications where thermal management and power budgeting are critical. The XC1765ELPD8I achieves this without sacrificing read speed or endurance.

Is the XC1765ELPD8I RoHS compliant?

The XC1765ELPD8I is not RoHS compliant, as it was manufactured prior to the 2006 RoHS directive enforcement and contains leaded solder terminations consistent with its PDIP-8 package construction. For RoHS-compliant alternatives, consider Xilinx's later-generation platform flash PROMs or SPI-based configuration memories meeting current environmental standards. The XC1765ELPD8I remains available for legacy repair and obsolescence management.