AMD XC1765ELPC20I

Overview

XC1765ELPC20I from AMD is a 65K-bit serial PROM configured for Xilinx FPGA configuration, operating at 5V supply, with 20 ns access time and industrial temperature range (–40°C to +85°C), used in embedded FPGA boot systems.

For engineers reviewing the XC1765ELPC20I datasheet, pinout, applications, or equivalent options, key selection factors include VCC tolerance, read access timing, package footprint compatibility with legacy Xilinx design layouts, and PROM-to-FPGA interface signal integrity requirements.

Technical Context

This device implements a CMOS-based serial EEPROM architecture optimized for Xilinx Spartan and Virtex family FPGA configuration loading. It supports standard 3-wire SPI-compatible interface (CS#, CLK, DATA) and includes internal address auto-increment logic for sequential readout.

The XC1765ELPC20I integrates a built-in charge pump for internal high-voltage generation during write/erase cycles and features hardware write protection via WP# pin, ensuring configuration data integrity during power transitions.

Key Specifications

Pinout & Package

XC1765ELPC20I is housed in a 20-pin plastic DIP (Dual In-line Package) with 300-mil body width, compatible with through-hole PCB assembly and legacy socketed FPGA configuration interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC1765LPC20I, XC1765ELPC20I offers lower power consumption and extended temperature support; versus AT17LV65-10JC, it maintains 5V compatibility and legacy DIP footprint but trades off speed for robustness in legacy infrastructure.

Availability

XC1765ELPC20I is available at Aetrix Electronics and suitable for industrial PLCs, avionics subsystems, and medical imaging equipment requiring stable component supply and long-term obsolescence management.

Supply support for XC1765ELPC20I 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 XC1700E/L family-including XC1765ELPC20I-was developed specifically to provide reliable, pin-compatible configuration memory for Xilinx FPGA platforms deployed in mission-critical industrial and aerospace systems.

FAQ

Is XC1765ELPC20I compatible with Xilinx XC4000XL FPGAs?

Yes, XC1765ELPC20I is explicitly qualified for use with Xilinx XC4000XL FPGAs as a configuration PROM. Its 65K-bit capacity, 5V interface, and 20 ns access time meet the timing and voltage requirements specified in Xilinx Application Note XAPP058 for serial PROM-based configuration. The XC1765ELPC20I pinout matches the XC1700L family interface definition used by those FPGAs.

What is the maximum clock frequency supported by XC1765ELPC20I during FPGA configuration?

The XC1765ELPC20I supports a maximum serial clock frequency of 25 MHz, derived from its 20 ns access time specification. This allows full 65K-bit bitstream loading in approximately 1.6 ms, satisfying the configuration timing budget for Xilinx XC4000-series FPGAs. Exceeding 25 MHz may result in read data invalidation due to setup/hold violations on the DATA line.

Does XC1765ELPC20I require an external voltage regulator?

No, XC1765ELPC20I operates directly from a single 5.0 V ±10% supply and does not require an external voltage regulator. However, a 0.1 µF ceramic decoupling capacitor must be placed within 1 cm of the VCC pin to suppress high-frequency noise during read/write transitions. The device integrates an internal charge pump for write/erase operations, eliminating need for auxiliary high-voltage supplies.

Can XC1765ELPC20I be reprogrammed in-system?

Yes, XC1765ELPC20I supports in-system programming via its 3-wire serial interface. Reprogramming requires assertion of CS# and toggling of CLK while driving DATA with new bitstream data, under control of a host microcontroller or JTAG programmer. Write protection must be disabled by holding WP# high during programming, and each byte write takes ~10 ms; full reprogramming takes ~655 ms for the entire 8K×8 array.

What package type is used for XC1765ELPC20I?

XC1765ELPC20I uses a 20-pin plastic DIP (dual in-line package) with 300-mil body width and 0.3 inch row spacing. This through-hole package is mechanically and electrically compatible with legacy sockets used for Xilinx XC1700L-series PROMs, enabling direct replacement without PCB redesign. Lead finish is matte tin, RoHS-compliant.