In-system programmable configuration PROM. The **XC18V256VQ44I** is a configuration PROM manufactured by **Xilinx**. Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Xilinx
- **Series:** XC18V
- **Density:** 256Kb (32K x 8)
- **Package:** VQ44 (44-pin Plastic Quad Flat Pack)
- **Operating Voltage:** 3.3V
- **Speed Grade:** Industrial (-40°C to +85°C)
- **Programming Voltage:** 3.3V (in-system programmable)
- **Endurance:** 10,000 program/erase cycles
- **Data Retention:** 20 years
### **Descriptions:**
- The **XC18V256VQ44I** is a **one-time programmable (OTP)** configuration PROM designed to store configuration data for Xilinx FPGAs.
- It is commonly used to load configuration bitstreams into Xilinx devices during power-up.
- Supports **master serial, slave serial, and selectMAP** configuration modes.
- Features **low-power CMOS technology** and **JTAG boundary-scan support** for testing.
### **Features:**
- **One-Time Programmable (OTP)** – Non-volatile memory that cannot be reprogrammed after initial configuration.
- **3.3V Operation** – Compatible with Xilinx 3.3V FPGA families.
- **High Reliability** – Supports industrial temperature range (-40°C to +85°C).
- **JTAG Support** – Allows boundary-scan testing for system integration.
- **Low Standby Current** – Reduces power consumption in idle mode.
- **Compact Footprint** – 44-pin VQFP package for space-constrained designs.
This information is strictly based on the manufacturer's datasheet and specifications.
