The XC1701LPD8C is a high-reliability 1Mbit serial configuration PROM manufactured by Xilinx (now AMD). This one-time programmable (OTP) memory device provides an efficient and cost-effective solution for storing Xilinx FPGA configuration bitstreams in embedded systems and industrial applications.
XC1701LPD8C Product Overview
The XC1701LPD8C belongs to the XC1700L series of low-voltage configuration PROMs. This device operates at 3.3V, making it ideal for modern low-power FPGA designs. Engineers rely on this component for its simple serial interface and robust performance across commercial temperature ranges.
Why Choose XC1701LPD8C for FPGA Configuration?
Xilinx designed the XC1701LPD8C to simplify FPGA programming while maintaining high reliability standards. The device requires only one user I/O pin to interface with compatible FPGAs, reducing board complexity and design time significantly.
XC1701LPD8C Technical Specifications
| Parameter |
Specification |
| Part Number |
XC1701LPD8C |
| Manufacturer |
Xilinx (AMD) |
| Memory Type |
Serial Configuration PROM |
| Memory Density |
1Mbit (1,048,576 bits) |
| Operating Voltage (VCC) |
3.0V to 3.6V |
| Package Type |
8-Pin PDIP |
| Operating Temperature |
0°C to +70°C |
| Programming Type |
One-Time Programmable (OTP) |
| Interface |
Serial |
| RoHS Compliance |
Yes |
XC1701LPD8C Electrical Characteristics
| Parameter |
Min |
Typ |
Max |
Unit |
| Supply Voltage (VCC) |
3.0 |
3.3 |
3.6 |
V |
| Input High Voltage (VIH) |
2.0 |
– |
VCC+0.5 |
V |
| Input Low Voltage (VIL) |
-0.5 |
– |
0.8 |
V |
| Output High Voltage (VOH) |
2.4 |
– |
– |
V |
| Output Low Voltage (VOL) |
– |
– |
0.4 |
V |
| Standby Current (ISB) |
– |
100 |
500 |
µA |
XC1701LPD8C 8-Pin PDIP Pinout Configuration
| Pin Number |
Pin Name |
Description |
| 1 |
RESET/OE |
Reset/Output Enable (Programmable Polarity) |
| 2 |
CLK |
Clock Input |
| 3 |
DATA |
Serial Data Output |
| 4 |
GND |
Ground |
| 5 |
CE |
Chip Enable (Active Low) |
| 6 |
CEO |
Chip Enable Output (Cascade) |
| 7 |
VPP |
Programming Voltage / VCC |
| 8 |
VCC |
Power Supply (3.3V) |
Key Features of XC1701LPD8C Configuration PROM
One-Time Programmable Memory Architecture
The XC1701LPD8C utilizes OTP technology, ensuring programmed data remains secure and unalterable. This makes it suitable for production environments where configuration integrity is critical.
Simple Serial Interface Design
Engineers appreciate the straightforward serial interface that requires minimal connections between the PROM and FPGA. This design approach reduces PCB routing complexity and potential signal integrity issues.
Cascadable Configuration Support
Multiple XC1701LPD8C devices can be daisy-chained using the CEO (Chip Enable Output) pin. This cascading capability allows storage of larger bitstreams or multiple FPGA configurations in a single system.
Programmable Reset Polarity
The RESET/OE pin supports programmable polarity (active high or active low), providing flexibility when interfacing with different FPGA families and system reset architectures.
Low Power Consumption
With standby current as low as 100µA typical, the XC1701LPD8C contributes minimal power overhead to battery-powered and energy-efficient designs.
XC1701LPD8C FPGA Compatibility
| FPGA Family |
Compatibility |
| Xilinx Spartan |
✓ Compatible |
| Xilinx Spartan-XL |
✓ Compatible |
| Xilinx XC4000XL |
✓ Compatible |
| Xilinx XC4000XLA |
✓ Compatible |
| Xilinx XC4000XV |
✓ Compatible |
| Xilinx Virtex |
✓ Compatible |
XC1701LPD8C Configuration Modes
Master Serial Mode Operation
In Master Serial mode, the FPGA generates the configuration clock (CCLK) that drives the XC1701LPD8C. Data appears on the DATA output pin shortly after each rising clock edge, with the FPGA controlling the complete configuration sequence.
Slave Serial Mode Operation
When operating in Slave Serial mode, both the XC1701LPD8C and the target FPGA receive clock signals from an external source. This mode enables synchronized multi-device configurations and external control of the programming process.
XC1701LPD8C Application Areas
The XC1701LPD8C serves diverse industries and applications requiring reliable FPGA configuration storage:
- Industrial Automation Systems — PLC controllers and motor drives
- Telecommunications Equipment — Network switches and routers
- Medical Devices — Diagnostic and monitoring equipment
- Aerospace and Defense — Avionics and radar systems
- Consumer Electronics — Set-top boxes and display controllers
- Automotive Electronics — Infotainment and ADAS systems
XC1701LPD8C vs. Related Part Numbers
| Part Number |
Voltage |
Package |
Temperature Range |
| XC1701LPD8C |
3.3V |
8-DIP |
0°C to +70°C (Commercial) |
| XC1701LPD8I |
3.3V |
8-DIP |
-40°C to +85°C (Industrial) |
| XC1701PD8C |
5V |
8-DIP |
0°C to +70°C (Commercial) |
| XC1701LPDG8C |
3.3V |
8-DIP (Lead-Free) |
0°C to +70°C (Commercial) |
| XC17512LPD8C |
3.3V |
8-DIP |
0°C to +70°C (512Kbit) |
| XC1702LVQ44C |
3.3V |
44-VQFP |
0°C to +70°C (2Mbit) |
XC1701LPD8C Ordering Information
| Complete Part Number |
Description |
| XC1701LPD8C |
1Mbit, 3.3V, 8-Pin PDIP, Commercial (0°C to +70°C) |
Package Marking Decoded
Due to space constraints on the 8-pin package, the device marking omits the “XC” prefix. Look for “1701LPD8C” marking on the physical component.
Programming Support for XC1701LPD8C
The XC1701LPD8C is programmable using Xilinx-approved programming equipment and third-party programmers. The Xilinx Alliance and Foundation software packages generate compatible hex format files for PROM programming.
Recommended Programming Tools
- Xilinx HW-130 Programmer
- Third-party universal programmers with Xilinx PROM support
- Xilinx ISE Design Suite for bitstream generation
XC1701LPD8C Design Considerations
Power Supply Requirements
Connect VPP directly to VCC during normal operation. Leaving VPP floating can cause unpredictable behavior and temperature-dependent operation issues.
Reset Pin Connection
For optimal system integration, drive the RESET/OE input from the FPGA INIT output. This ensures proper synchronization during the configuration sequence.
Decoupling Capacitor Placement
Place 0.1µF ceramic capacitors close to VCC and GND pins to ensure stable operation and minimize noise coupling.
Frequently Asked Questions About XC1701LPD8C
What does the “L” in XC1701LPD8C mean?
The “L” designates low-voltage operation (3.3V). Standard XC1701 devices without the “L” suffix operate at 5V.
Can XC1701LPD8C be reprogrammed?
No. The XC1701LPD8C is a one-time programmable (OTP) device. Once programmed, the configuration data cannot be changed or erased.
What is the data retention period?
Configuration data remains valid for more than 20 years under normal operating conditions.
How many XC1701LPD8C devices can be cascaded?
Multiple devices can be cascaded without a hard limit. The practical number depends on FPGA configuration requirements and bitstream sizes.
