Field programmable gate array. The **XC4005E-4PQ100C** is a Field-Programmable Gate Array (FPGA) manufactured by **Xilinx**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Xilinx
- **Family:** XC4000E
- **Part Number:** XC4005E-4PQ100C
- **Logic Cells/Gates:** ~5,000 gates
- **Speed Grade:** -4 (moderate speed performance)
- **Package:** PQ100 (Plastic Quad Flat Pack, 100 pins)
- **Operating Voltage:** 5V
- **Configuration:** SRAM-based (volatile, requires external configuration memory)
- **I/O Pins:** 64 user I/Os
- **On-Chip RAM:** Limited distributed RAM (configurable as small memory blocks)
- **Max Internal Frequency:** Varies based on design (~50 MHz typical)
### **Descriptions:**
- The **XC4005E** is part of Xilinx’s **XC4000E series**, an older generation of FPGAs optimized for general-purpose digital logic.
- It features a **5V core voltage**, making it compatible with legacy systems.
- The **-4 speed grade** indicates moderate performance, suitable for mid-range applications.
- The **PQ100 package** is a through-hole or surface-mount option with 100 pins.
### **Features:**
- **Programmable Logic Blocks (CLBs):** Contains configurable logic blocks for implementing combinational and sequential logic.
- **Flexible Routing:** Interconnect resources for custom signal routing.
- **5V Tolerant I/Os:** Supports interfacing with 5V systems.
- **SRAM-Based Configuration:** Requires an external PROM or microcontroller for loading the bitstream.
- **JTAG Support:** For boundary scan testing and in-system programming.
- **Applications:** Used in prototyping, industrial control, and legacy digital systems.
This FPGA is now considered **obsolete** (not recommended for new designs) but may still be found in older systems.
(Data sourced from Xilinx’s official documentation and product archives.)
