XC18V01VQ44I

Overview

The XC18V01VQ44I is a 3.3V in-system programmable configuration PROM from the XC18V00 series, manufactured by AMD/Xilinx. It provides 1 Mbit (1,048,576 bits) of non-volatile storage for FPGA bitstreams. The device operates within a commercial/industrial temperature range of –40°C to +85°C and supports a maximum clock frequency of 33 MHz. It features dual configuration modes: serial (up to 33 MHz) and parallel (up to 264 Mb/s). The component utilizes a low-power advanced CMOS FLASH process with an endurance of 20,000 program/erase cycles and includes IEEE Std 1149.1 JTAG support for programming and boundary-scan testing.

Feature Summary

• Supports in-system programming via standard 4-pin JTAG protocol for efficient design iterations without package handling.
• Offers dual configuration modes including Master Serial, Slave Serial, and SelectMAP interfaces for flexible FPGA integration.
• Incorporates advanced data security features to prevent unauthorized reading of internal programming patterns via JTAG.
• Features cascading capability through Chip Enable Output (CEO) to store longer or multiple bitstreams.

Applications

• Configuration of Xilinx Virtex-II, Spartan-II, and Spartan-IIE FPGAs in Master Serial mode
• Configuration of Xilinx Virtex-II FPGAs in Slave-Parallel or Slave-SelectMAP modes
• Cascaded memory systems for storing large FPGA configuration bitstreams

Procurement Notes

Verify the specific suffix 'VQ44' corresponds to the 44-pin VQFP package and 'I' indicates the industrial temperature grade (-40°C to +85°C). Confirm that the source documentation explicitly links this part number to the XC18V01 capacity variant. Ensure compatibility with the target FPGA's voltage requirements, as the device supports 3.3V or 2.5V output capabilities.

Selection Notes

Select this component when a 1 Mbit configuration memory is required for compatible Xilinx FPGAs. The VQ44 package is suitable for surface-mount applications requiring a compact footprint. Consider the industrial temperature rating if the operating environment exceeds commercial limits. Verify that the target FPGA supports the desired configuration mode, such as Master Serial or Slave Parallel, which dictates the interface complexity.

Part Context

The XC18V01VQ44I belongs to the XC18V00 series of in-system programmable configuration PROMs. This family includes devices with capacities ranging from 512 Kbit to 4 Mbit. These PROMs are designed specifically to store and provide configuration data to Xilinx FPGAs, offering a cost-effective method for re-programming and storing bitstreams compared to one-time programmable alternatives.

Replacement Considerations

Compatible substitutes within the same family include XC18V01PC44I (PLCC package) or XC18V01SO20I (SOIC package). For different capacities, XC18V02VQ44I (2 Mbit) or XC18V04VQ44I (4 Mbit) may be used if the application requires more storage, provided the FPGA configuration size allows.