AMD XC1765ELSO8I

Overview

XC1765ELSO8I from AMD is a configuration PROM for Spartan and Virtex FPGAs, providing 65 Mbit serial configuration memory in an 8-pin SOIC package with 3.3 V supply, -40°C to +85°C industrial temperature range, and 100,000 program/erase cycles. It is used in FPGA-based industrial control systems requiring reliable bitstream storage.

For engineers reviewing the XC1765ELSO8I datasheet, pinout, applications, or equivalent options, key selection criteria include serial interface compatibility with Xilinx FPGA configuration modes, endurance rating, data retention time, and industrial-grade temperature operation.

Technical Context

This PROM implements a synchronous serial interface compliant with Xilinx FPGA master serial mode, supporting clock frequencies up to 33 MHz. It uses NOR flash technology with sector erase architecture and supports both power-on auto-configuration and in-system programming via dedicated command sequences.

The device integrates a 16-bit internal address register and supports byte-wide read access through sequential addressing. Configuration data integrity is maintained via built-in CRC checking during readback, and write protection is enforced via hardware write-enable pin and software lock bits.

Key Specifications

Pinout & Package

8-pin SOIC (SO-8) package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC1765ELSO8I, XCF08PVOG20 offers smaller footprint and lower voltage but requires PCB redesign and FPGA interface change, while MT28EW01GABA1HPC-0SIT provides greater density and flexibility at the cost of command-set compatibility and added firmware complexity.

Availability

XC1765ELSO8I is available at Aetrix Electronics and suitable for industrial PLCs, FPGA-based motor drives, and avionics test equipment requiring stable component supply and long-term obsolescence management.

Supply support for XC1765ELSO8I 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 is a global semiconductor company specializing in high-performance computing, adaptive SoCs, and programmable logic solutions for data center, embedded, and aerospace applications.

The XC1700 series was developed specifically to provide standardized, high-reliability configuration memory for Xilinx Spartan and Virtex FPGA families in industrial and mission-critical systems.

FAQ

What is the primary function of the XC1765ELSO8I in an FPGA system?

The XC1765ELSO8I serves as a nonvolatile configuration PROM that stores and delivers the FPGA bitstream during power-up. It operates in Xilinx master serial mode, driving configuration data directly into Spartan-II and Virtex-E FPGAs. Its synchronous serial interface eliminates external glue logic, and its 65 Mbit capacity accommodates full bitstreams for these FPGA families. The XC1765ELSO8I ensures repeatable, CRC-verified initialization critical for industrial system reliability.

Does the XC1765ELSO8I support in-system programming?

Yes, the XC1765ELSO8I supports in-system programming via its serial interface using standard Xilinx configuration commands. Programming can be initiated by the host FPGA after configuration or by an external microcontroller using the SI, SCLK, and CE# pins. The device includes write protection via the WP# pin and software lock bits to prevent unintended erasure. This capability enables field updates of FPGA logic without removing the XC1765ELSO8I from the board.

What is the maximum clock frequency supported by the XC1765ELSO8I serial interface?

The XC1765ELSO8I supports a maximum serial clock (SCLK) frequency of 33 MHz, as specified in the AMD/Xilinx XC1700 family datasheet. This allows fast configuration loading-typically under 100 ms for full 65 Mbit bitstreams-reducing system boot time. The timing is guaranteed across the full -40°C to +85°C operating range and 3.3 V ±10% supply, making it suitable for time-critical industrial applications where deterministic startup is required.

How does the XC1765ELSO8I ensure configuration data integrity?

The XC1765ELSO8I ensures configuration data integrity through built-in CRC readback verification. During FPGA configuration, the device calculates and appends a CRC checksum to the bitstream; the FPGA validates this checksum before completing startup. Additionally, the XC1765ELSO8I supports readback mode for external verification. Its 20-year data retention at 85°C and 100,000 program/erase cycles further guarantee long-term bitstream fidelity without degradation or corruption.

Is the XC1765ELSO8I pin-compatible with other devices in the XC1700 family?

Yes, the XC1765ELSO8I shares identical pinout, package, and command set with other 8-pin SOIC variants in the XC1700 family-including XC1736ELSO8I and XC17128ELSO8I-enabling drop-in capacity upgrades within the same footprint. All devices use the same CE#, SI, SCLK, SO, WP#, and HOLD# signal assignments and respond to identical Xilinx master serial commands. This simplifies BOM rationalization and design reuse across FPGA configurations of varying complexity.