Meta Description: XC1736ESC is a 36K-bit serial configuration PROM for Xilinx FPGA. Discover specifications, pinout, features, and applications. One-time programmable memory with simple interface.
The XC1736ESC is a high-performance serial configuration PROM manufactured by Xilinx (now AMD) specifically designed for storing FPGA configuration bitstreams. This one-time programmable (OTP) memory offers an easy-to-use, cost-effective solution for engineers working with Xilinx FPGA devices in embedded systems, industrial applications, and telecommunications equipment.
XC1736ESC Product Overview
The XC1736ESC belongs to the XC1700E family of serial configuration PROMs and provides 36,288 configuration bits of storage capacity. This component serves as a reliable boot memory solution that automatically loads FPGA configurations during power-up sequences. Engineers choose the XC1736ESC for its straightforward integration requirements and robust performance characteristics.
What Makes the XC1736ESC Stand Out?
This configuration PROM requires only a single user I/O pin to interface with Xilinx FPGA devices. The XC1736ESC supports both Master Serial and Slave Serial configuration modes, providing flexibility for various system architectures. Multiple devices can be cascaded together to support larger bitstreams or multiple FPGA configurations.
XC1736ESC Technical Specifications
| Parameter |
Specification |
| Part Number |
XC1736ESC / XC1736ESOG8C |
| Manufacturer |
Xilinx (AMD) |
| Memory Type |
PROM (One-Time Programmable) |
| Memory Size |
36K-bit (36,288 Configuration Bits) |
| Interface |
Serial |
| Supply Voltage (VCC) |
5V (4.75V – 5.25V) |
| Programming Voltage (VPP) |
12.5V |
| Operating Frequency |
Up to 8 MHz |
| Technology |
CMOS |
XC1736ESC Electrical Characteristics
| Parameter |
Min |
Typ |
Max |
Unit |
| Supply Voltage (VCC) |
4.75 |
5.0 |
5.25 |
V |
| Programming Voltage |
– |
12.5 |
– |
V |
| Operating Current (ICC) |
– |
– |
10 |
mA |
| Standby Current (ICCS) |
– |
– |
100 |
µA |
| 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 |
XC1736ESC Temperature Ratings
| Version |
Temperature Range |
Description |
| XC1736ESC (Commercial) |
0°C to +70°C |
Standard commercial grade |
| XC1736EISC (Industrial) |
-40°C to +85°C |
Extended temperature range |
XC1736ESC Package Options and Pinout
The XC1736ESC is available in multiple package configurations to suit different PCB design requirements.
Available Package Types
| Package |
Pin Count |
Package Code |
Dimensions |
| SOIC-8 |
8-Pin |
SOG8 |
4.9mm × 3.9mm |
| PDIP-8 |
8-Pin |
PD8 |
9.27mm × 6.35mm |
| PLCC-20 |
20-Pin |
PC20 |
9.78mm × 9.78mm |
| VOIC-8 |
8-Pin |
VO8 |
4.4mm × 3.0mm |
8-Pin Package Pinout Configuration
| Pin Number |
Pin Name |
Description |
| 1 |
DATA |
Serial data output (active when CE and OE enabled) |
| 2 |
CLK |
Configuration clock input |
| 3 |
RESET/OE |
Reset or Output Enable (programmable polarity) |
| 4 |
CE |
Chip Enable (active low) |
| 5 |
GND |
Ground connection |
| 6 |
CEO |
Chip Enable Output (for cascading) |
| 7 |
VPP |
Programming voltage (connect to VCC during operation) |
| 8 |
VCC |
Positive supply voltage (5V) |
XC1736ESC Key Features and Benefits
One-Time Programmable Memory Architecture
The XC1736ESC utilizes OTP technology that provides permanent, non-volatile storage for FPGA configuration data. Once programmed, the bitstream remains intact through power cycles without requiring external batteries or refresh operations.
Simple FPGA Interface Requirements
Engineers appreciate that the XC1736ESC needs only one user I/O pin from the FPGA for data transfer. This minimal pin requirement simplifies PCB layout and reduces routing complexity in space-constrained designs.
Cascadable Design for Larger Configurations
The CEO (Chip Enable Output) pin allows multiple XC1736ESC devices to be daisy-chained together. This cascading capability supports longer bitstreams required by larger FPGA devices or enables storage of multiple configurations.
Programmable Reset Polarity
The XC1736ESC offers configurable reset polarity (active high or active low) to ensure compatibility with different FPGA families and system architectures. This flexibility reduces external logic requirements.
Industry-Standard Programming Support
The XC1736ESC is compatible with leading PROM programmers from manufacturers including Data I/O, BP Microsystems, and Xeltek. Xilinx Alliance and Foundation software packages generate the required programming files.
XC1736ESC Operating Modes Explained
Master Serial Configuration Mode
In Master Serial mode, the FPGA controls the configuration process by generating the clock signal (CCLK). The XC1736ESC responds to each rising clock edge by presenting the next data bit on the DATA output pin. The FPGA continues clocking until all configuration bits are transferred.
Slave Serial Configuration Mode
When operating in Slave Serial mode, both the FPGA and XC1736ESC receive clock signals from an external source. This mode is useful when multiple FPGAs require synchronized configuration or when system-level clock management is preferred.
XC1736ESC Compatible FPGA Families
The XC1736ESC provides configuration storage for various Xilinx FPGA families, particularly smaller devices with configuration requirements within the 36K-bit capacity.
| FPGA Family |
Compatible Devices |
Notes |
| Spartan Series |
XCS05, XCS10 |
Full configuration support |
| XC4000E/EX |
XC4002A, XC4003E |
Legacy applications |
| XC3000 Series |
XC3020, XC3030 |
Established designs |
XC1736ESC Typical Application Circuit
The standard application circuit for the XC1736ESC requires the following connections:
- Power Supply: Connect VCC (Pin 8) to regulated 5V supply with appropriate decoupling capacitors (0.1µF ceramic recommended near the device)
- Ground: Connect GND (Pin 5) to system ground plane
- VPP Connection: During normal operation, connect VPP (Pin 7) directly to VCC. Never leave VPP floating as this may cause unpredictable behavior
- Data Interface: Connect DATA (Pin 1) to the FPGA DIN pin
- Clock: Connect CLK (Pin 2) to the FPGA CCLK output
- Control Signals: Configure CE and RESET/OE according to system requirements
XC1736ESC Programming Guidelines
Software Tools Required
- Xilinx ISE Design Suite or Vivado Design Suite for bitstream generation
- PROM File Formatter for HEX/MCS file conversion
- Compatible device programmer with XC1736E support
Programming Sequence
- Generate FPGA configuration bitstream using Xilinx development tools
- Convert bitstream to PROM programming format (Intel HEX or MCS)
- Load programming file into compatible PROM programmer
- Apply programming voltage (12.5V) during programming cycle
- Verify programmed data against source file
XC1736ESC Ordering Information
| Part Number |
Package |
Temperature Range |
Description |
| XC1736ESOG8C |
8-SOIC |
0°C to +70°C |
Commercial SOIC package |
| XC1736EPD8C |
8-PDIP |
0°C to +70°C |
Commercial DIP package |
| XC1736EPC20C |
20-PLCC |
0°C to +70°C |
Commercial PLCC package |
| XC1736EISOG8I |
8-SOIC |
-40°C to +85°C |
Industrial temperature |
XC1736ESC vs Alternative Configuration Memory Solutions
| Feature |
XC1736ESC |
Flash-Based PROM |
External SPI Flash |
| Memory Type |
OTP |
In-System Reprogrammable |
Reprogrammable |
| Interface |
Serial (1-wire data) |
Serial/Parallel |
SPI (4-wire) |
| Configuration Speed |
Fast |
Fast |
Variable |
| Cost |
Low |
Moderate |
Low |
| Reprogramming |
Not possible |
Field update capable |
Field update capable |
| Best For |
Production systems |
Development/Field update |
Flexible applications |
Frequently Asked Questions About XC1736ESC
What is the XC1736ESC used for?
The XC1736ESC stores configuration bitstreams for Xilinx FPGA devices. During system power-up, the PROM automatically transfers stored data to configure the FPGA logic and routing resources.
Can the XC1736ESC be reprogrammed?
No, the XC1736ESC is one-time programmable (OTP) memory. Once programmed, the configuration data cannot be changed. For applications requiring field updates, consider in-system programmable alternatives like the XC18V00 series.
How many FPGAs can one XC1736ESC configure?
One XC1736ESC can configure a single FPGA with configuration requirements of 36,288 bits or less. Larger FPGAs or multiple configurations require cascading several devices together.
What happens if VPP is left floating?
Leaving VPP unconnected during normal operation causes unpredictable, temperature-dependent behavior. Always connect VPP to VCC when the device is in read mode.
Is the XC1736ESC RoHS compliant?
Current production versions of the XC1736ESC meet RoHS compliance requirements with lead-free terminations. Verify specific compliance details with your distributor for particular date codes.
XC1736ESC Design Considerations and Best Practices
PCB Layout Recommendations
- Place decoupling capacitors (0.1µF) within 0.5 inches of VCC and GND pins
- Maintain short, direct connections for high-speed clock signals
- Use ground plane for improved noise immunity
- Consider thermal relief patterns for through-hole variants
System Integration Tips
- Ensure stable VCC before initiating configuration sequence
- Allow adequate configuration time based on clock frequency and bitstream size
- Implement proper reset sequencing between PROM and FPGA
- Consider cascade requirements early in the design phase
Summary
The XC1736ESC remains a trusted solution for FPGA configuration storage in applications where permanent, reliable bitstream storage is essential. With its simple interface, cascadable architecture, and proven reliability, this 36K-bit serial configuration PROM continues to serve designers in industrial, communications, and embedded system applications worldwide.
For technical documentation, application notes, and development tool information, consult the official Xilinx (AMD) documentation resources.
