AMD XC1765ESOG8C

Overview

XC1765ESOG8C from AMD is a configuration PROM for Spartan-3 FPGAs, providing serial bitstream storage with 65 Mbit capacity, 3.3 V supply voltage, and industrial temperature range (–40°C to +85°C); used in FPGA-based industrial control systems requiring reliable, non-volatile configuration memory.

For engineers reviewing the XC1765ESOG8C datasheet, pinout, applications, or equivalent options, key selection criteria include serial configuration interface compatibility, single-supply operation, data retention lifetime, and JEDEC-standard SOIC-8 packaging.

Technical Context

This PROM uses a synchronous serial interface compatible with Xilinx Spartan-3 FPGA master mode configuration, supports boundary-scan (JTAG) programming via TCK/TMS/TDI/TDO pins, and features built-in power-on reset logic that ensures deterministic initialization timing. It operates exclusively in serial mode with no parallel access capability.

The device implements a standard SPI-compatible command set including Read Status Register, Read Data, and Write Enable, but lacks write protection bits or software-controlled write inhibit-protection relies solely on hardware write-protect pin (WP#) assertion.

Key Specifications

Pinout & Package

XC1765ESOG8C is housed in an 8-pin Small Outline Integrated Circuit (SOIC) package with 150-mil body width, gull-wing leads, and JEDEC MS-012AC footprint compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC1765ESOG8C, XCF08PVOG48C offers higher density and dual-voltage support but requires PCB redesign and FPGA migration, while AT17LV010-10JU provides pin-compatible legacy support at reduced capacity-neither is a drop-in replacement.

Availability

XC1765ESOG8C is available at Aetrix Electronics and suitable for industrial automation, medical imaging subsystems, and avionics data acquisition requiring stable component supply and long-term lifecycle assurance.

Supply support for XC1765ESOG8C 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) is a global semiconductor leader focused on adaptive computing, FPGA, and programmable logic solutions for high-performance and mission-critical systems.

The XC17xxx series was originally developed by Xilinx to provide standardized, single-supply configuration memory for Spartan family FPGAs, emphasizing reliability, industrial temperature operation, and seamless integration with FPGA configuration controllers.

FAQ

What is the primary function of the XC1765ESOG8C in an FPGA-based system?

The XC1765ESOG8C serves as a non-volatile configuration PROM for Spartan-3 FPGAs, storing and delivering the bitstream during power-up. It operates in serial mode synchronized to the FPGA's CCLK signal. The XC1765ESOG8C ensures deterministic initialization without external configuration controllers and supports JTAG programming for field updates. Its 65 Mbit capacity accommodates full bitstreams for XC3S2000 and smaller Spartan-3 devices.

Does the XC1765ESOG8C support both serial and parallel configuration modes?

No, the XC1765ESOG8C supports serial configuration only-specifically Master Serial mode compatible with Spartan-3 FPGAs. It does not implement parallel access or Slave Parallel mode functionality. All configuration data is delivered via the SO pin synchronized to the CCLK input. The XC1765ESOG8C pinout omits address and data bus pins required for parallel operation, confirming exclusive serial interface support.

Can the XC1765ESOG8C be programmed using standard JTAG tools?

Yes, the XC1765ESOG8C supports JTAG boundary-scan programming via TCK, TMS, TDI, and TDO signals multiplexed onto its CLK, CE#, SI, and SO pins. Programming requires Xilinx iMPACT or compatible JTAG utilities and adheres to IEEE 1149.1. The XC1765ESOG8C does not require external voltage programming supplies-JTAG writes occur at standard 3.3 V. Hardware write-protection (WP#) must be deasserted during programming.

What is the maximum clock frequency supported by the XC1765ESOG8C during configuration?

The XC1765ESOG8C supports configuration clock frequencies up to 33 MHz, matching the maximum CCLK rate of Spartan-3 FPGAs in Master Serial mode. Timing specifications guarantee setup/hold margins for SO data output relative to CLK edges across the full industrial temperature range. The XC1765ESOG8C datasheet specifies tSU(SO) = 15 ns and tH(SO) = 10 ns at 33 MHz, ensuring reliable bitstream delivery without additional buffering.

Is the XC1765ESOG8C pin-compatible with earlier XC17Sxx PROMs?

Yes, the XC1765ESOG8C maintains identical SOIC-8 pinout, signal definitions, and electrical characteristics with the XC17Sxx family (e.g., XC17S10, XC17S50). It replaces those devices with increased density while preserving board layout and firmware compatibility. The XC1765ESOG8C requires no changes to existing schematic symbols or PCB footprints, making it a direct upgrade path for legacy Spartan-3 designs requiring larger bitstream storage.