The XC1736EPD8I is a high-reliability serial configuration PROM manufactured by Xilinx (now AMD). This industrial-grade memory IC is specifically designed to store and load configuration bitstreams for Xilinx FPGA devices. With its compact 8-pin PDIP package and extended temperature range, the XC1736EPD8I delivers exceptional performance for demanding embedded applications.
XC1736EPD8I Product Overview
The XC1736EPD8I belongs to the XC1700E family of one-time programmable (OTP) configuration PROMs. Engineers choose this component for its simple interface, reliable operation, and seamless integration with Xilinx FPGA architectures. The device stores 36Kb of configuration data, making it ideal for small to medium-sized FPGA designs.
Why Choose the XC1736EPD8I Configuration PROM?
This serial PROM offers several advantages for FPGA configuration:
- Automatic Configuration: Loads FPGA bitstreams automatically at power-up
- Single I/O Interface: Requires only one user I/O pin from the FPGA
- Industrial Temperature Rating: Operates reliably from -40°C to +85°C
- Cascadable Design: Multiple PROMs can be chained for larger bitstreams
- Low Power Consumption: Built on efficient CMOS EPROM process technology
XC1736EPD8I Technical Specifications
| Parameter |
Specification |
| Manufacturer |
Xilinx Inc. (AMD) |
| Part Number |
XC1736EPD8I |
| Product Category |
Memory – Configuration PROMs for FPGAs |
| Memory Size |
36Kb (35,840 bits) |
| Memory Type |
OTP (One-Time Programmable) |
| Supply Voltage |
4.5V to 5.5V |
| Operating Temperature |
-40°C to +85°C (Industrial) |
| Package Type |
8-PDIP (8-Pin Plastic DIP) |
| Package Dimensions |
0.300″ (7.62mm) width |
| Data Interface |
Serial |
| Mounting Style |
Through-Hole |
XC1736EPD8I Part Number Breakdown
Understanding the XC1736EPD8I part number helps identify its exact specifications:
| Code Segment |
Meaning |
| XC |
Xilinx Commercial Product |
| 17 |
Configuration PROM Family Series |
| 36 |
Memory Density (36Kb) |
| E |
E-Series (Enhanced Features) |
| PD |
Plastic DIP Package |
| 8 |
8-Pin Configuration |
| I |
Industrial Temperature Range (-40°C to +85°C) |
XC1736EPD8I Key Features and Benefits
Simple FPGA Configuration Interface
The XC1736EPD8I provides a straightforward Master Serial mode interface. When the FPGA powers up with mode pins set to M0=0, M1=0, M2=0, configuration data transfers automatically. The FPGA generates a CCLK signal, and data appears on the PROM DATA output pin connected to the FPGA DIN input.
Cascading Capability for Larger Designs
Multiple XC1736EPD8I devices can be cascaded using the CEO (Chip Enable Output) and CE (Chip Enable) pins. This feature enables storage of longer bitstreams or multiple configuration profiles without complex external logic.
Programmable Reset Polarity
The XC1736EPD8I supports both active-high and active-low reset configurations. This flexibility ensures compatibility with various Xilinx FPGA families and system reset architectures.
On-Chip Address Counter
An integrated address counter automatically increments with each clock edge. This eliminates the need for external address generation circuitry, reducing board complexity and component count.
XC1736EPD8I Pin Configuration
| Pin Number |
Pin Name |
Function |
| 1 |
CLK |
Clock Input |
| 2 |
DATA |
Serial Data Output |
| 3 |
CE |
Chip Enable (Active Low) |
| 4 |
GND |
Ground |
| 5 |
CEO |
Chip Enable Output (for cascading) |
| 6 |
RST/OE |
Reset/Output Enable |
| 7 |
NC |
No Connection |
| 8 |
VCC |
Power Supply (5V) |
XC1736EPD8I Electrical Characteristics
| Parameter |
Min |
Typ |
Max |
Unit |
| Supply Voltage (VCC) |
4.5 |
5.0 |
5.5 |
V |
| Input High Voltage (VIH) |
2.0 |
– |
VCC+0.3 |
V |
| Input Low Voltage (VIL) |
-0.3 |
– |
0.8 |
V |
| Output High Voltage (VOH) |
2.4 |
– |
– |
V |
| Output Low Voltage (VOL) |
– |
– |
0.4 |
V |
| Supply Current (ICC) |
– |
5 |
10 |
mA |
| Standby Current (ISB) |
– |
100 |
– |
µA |
Compatible FPGA Families
The XC1736EPD8I configuration PROM is compatible with these Xilinx FPGA families:
| FPGA Family |
Compatibility |
Notes |
| XC2000 |
✓ Compatible |
Legacy support |
| XC3000 |
✓ Compatible |
Full support |
| XC4000E |
✓ Compatible |
Recommended |
| XC4000EX |
✓ Compatible |
Recommended |
| Spartan |
✓ Compatible |
Entry-level applications |
XC1736EPD8I Application Areas
The XC1736EPD8I serial configuration PROM serves various industries and applications:
Industrial Automation
- Programmable logic controllers (PLCs)
- Motor drive systems
- Industrial sensors and instrumentation
Telecommunications
- Network interface equipment
- Signal processing modules
- Protocol conversion devices
Consumer Electronics
- Set-top boxes
- Video processing equipment
- Audio systems
Military and Aerospace
- Ruggedized electronics
- Avionics systems
- Defense communication equipment
XC1736EPD8I Ordering Information
| Part Number |
Temperature Range |
Package |
Packaging |
| XC1736EPD8I |
-40°C to +85°C |
8-PDIP |
Tube |
| XC1736EPD8C |
0°C to +70°C |
8-PDIP |
Tube |
| XC1736EPC8 |
0°C to +70°C |
8-PDIP |
Tube |
| XC1736EVO8I |
-40°C to +85°C |
8-TSOP |
Tape & Reel |
XC1736EPD8I Programming Support
The XC1736EPD8I can be programmed using standard PROM programming equipment. Xilinx development tools generate configuration files in standard HEX format compatible with most commercial programmers.
Supported Development Tools
- Xilinx ISE Design Suite
- Xilinx Foundation Series
- Xilinx Alliance Software
Programming File Formats
- Intel HEX (.hex)
- Motorola S-Record (.mcs)
- Binary (.bin)
Design Considerations for XC1736EPD8I
Power Supply Decoupling
Place a 0.1µF ceramic capacitor close to the VCC pin to ensure stable operation and minimize noise susceptibility.
Clock Signal Integrity
Keep the CLK trace short and away from high-speed signals to prevent configuration errors.
Reset Timing
Ensure proper reset timing during power-up to guarantee reliable FPGA configuration.
Thermal Management
Although the XC1736EPD8I operates within industrial temperature ranges, adequate airflow prevents thermal stress in enclosed systems.
XC1736EPD8I vs. Alternative Configuration Solutions
| Feature |
XC1736EPD8I |
Platform Flash |
External SPI Flash |
| Memory Size |
36Kb |
Up to 128Mb |
Variable |
| Interface |
Serial |
Parallel/Serial |
SPI |
| Reprogrammable |
No (OTP) |
Yes |
Yes |
| Cost |
Low |
Medium |
Low-Medium |
| Integration |
Simple |
Complex |
Medium |
| Power Consumption |
Very Low |
Low |
Low |
Frequently Asked Questions About XC1736EPD8I
What does the “I” suffix mean in XC1736EPD8I?
The “I” suffix indicates Industrial temperature grade, meaning the device operates reliably from -40°C to +85°C. Commercial grade parts use a “C” suffix and operate from 0°C to +70°C.
Can I reprogram the XC1736EPD8I?
No. The XC1736EPD8I is a one-time programmable (OTP) device. Once programmed, the configuration data cannot be changed. For reprogrammable solutions, consider Xilinx Platform Flash or external SPI Flash memories.
How many XC1736EPD8I devices can be cascaded?
Multiple devices can be cascaded without practical limit. The CEO output of one device connects to the CE input of the next, allowing storage of larger bitstreams across multiple PROMs.
Is the XC1736EPD8I still in production?
The XC1736EPD8I is a mature product. While Xilinx (AMD) continues to support existing designs, newer designs may benefit from Platform Flash or SPI Flash solutions. Check with authorized distributors for current availability.
Summary
The XC1736EPD8I serial configuration PROM remains a reliable choice for FPGA configuration in industrial and commercial applications. Its simple interface, industrial temperature rating, and proven track record make it suitable for designs requiring stable, cost-effective configuration storage. Engineers working with legacy Xilinx FPGA designs will find the XC1736EPD8I provides the reliability and performance needed for demanding applications.
