The XC1765EPD8I is a high-reliability one-time programmable (OTP) serial configuration PROM manufactured by Xilinx (now AMD). This industrial-grade memory IC stores FPGA configuration bitstreams in a compact 8-pin PDIP package. Engineers worldwide trust this component for demanding embedded systems requiring reliable FPGA initialization.

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XC1765EPD8I Product Overview

The XC1765EPD8I belongs to the XC1700E family of configuration PROMs. These devices provide a cost-effective method for storing large Xilinx FPGA configuration bitstreams. The XC1765EPD8I operates at 3.3V and features industrial temperature range support (-40°C to +85°C), making it ideal for harsh operating environments.

When paired with Xilinx FPGAs in Master Serial mode, this PROM automatically delivers configuration data upon power-up. The FPGA generates the configuration clock while the PROM outputs data on each rising edge. This streamlined interface requires only one user I/O pin, simplifying PCB design.

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XC1765EPD8I Technical Specifications

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XC1765EPD8I Pin Configuration

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Key Features of XC1765EPD8I

OTP Memory Architecture

The XC1765EPD8I utilizes a low-power CMOS floating-gate process. This architecture ensures long-term data retention up to 20 years. Unlike flash-based alternatives, OTP technology eliminates accidental reprogramming risks in field-deployed systems.

Simple FPGA Interface

Configuration requires minimal external components. The serial interface connects directly to the FPGA DIN pin. After successful configuration, the FPGA automatically disables the PROM, reducing standby power consumption.

Cascadable Design

Multiple XC1765EPD8I devices can be daisy-chained for larger bitstreams. The CEO (Cascade Enable Output) pin connects to the CE input of subsequent PROMs. This feature supports multi-FPGA systems or high-density configurations exceeding 64 Kbit.

Programmable Reset Polarity

The reset polarity can be programmed as active-high or active-low. This flexibility ensures compatibility with different FPGA families and system reset schemes.

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XC1765EPD8I Operating Conditions

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Compatible FPGA Families

The XC1765EPD8I works seamlessly with multiple Xilinx FPGA families in Master Serial configuration mode:

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XC1765EPD8I Applications

This configuration PROM excels in applications requiring reliable non-volatile FPGA initialization:

Industrial Control Systems

Factory automation equipment benefits from the industrial temperature rating. PLCs, motor controllers, and sensor interfaces use this PROM for dependable startup sequences.

Telecommunications Equipment

Network switches, routers, and base station equipment require consistent FPGA configuration across wide temperature ranges.

Medical Devices

Diagnostic instruments and patient monitoring systems demand high-reliability components with guaranteed data retention.

Aerospace and Defense

Military-grade variants serve applications requiring extreme environmental tolerance and long operational lifespans.

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Design Considerations for XC1765EPD8I

PCB Layout Recommendations

Place decoupling capacitors close to the VCC and GND pins. A 0.1µF ceramic capacitor provides adequate high-frequency filtering. Keep clock traces short to minimize signal integrity issues.

Programming Requirements

Standard device programmers from leading manufacturers support the XC1765EPD8I. Xilinx Alliance software generates the programming bitstream files. Verify programmer compatibility before production programming.

Storage and Handling

Store devices in original packaging until use. Observe ESD precautions during handling. The PDIP package withstands standard reflow soldering temperatures for through-hole mounting.

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Alternative Package Options

The XC1765E family offers multiple package variants:

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Ordering Information

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Conclusion

The XC1765EPD8I delivers proven reliability for FPGA configuration storage. Its industrial temperature rating, compact 8-pin PDIP package, and 20-year data retention make it suitable for demanding applications. Engineers seeking a dependable configuration solution will find the XC1765EPD8I meets their requirements for quality, longevity, and ease of integration.