256 Macrocell CPLD The **XCR3256XL-12TQ144C** is a **CPLD (Complex Programmable Logic Device)** manufactured by **Xilinx**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Device Type:** CPLD (CoolRunner XPLA3 Family)
- **Logic Cells:** 256 macrocells
- **Gates:** 6,000 usable gates
- **Speed Grade:** **-12** (12ns pin-to-pin delay)
- **Package:** **TQFP-144** (Thin Quad Flat Pack, 144 pins)
- **Operating Voltage:** **3.3V** (with 5V-tolerant I/O)
- **Operating Temperature:** Commercial (**0°C to +70°C**)
- **I/O Pins:** **100** (usable)
- **Max Frequency:** **100 MHz** (system performance)
- **JTAG Support:** Yes (for in-system programming)
### **Descriptions:**
- **Architecture:** Advanced **XPLA3 (eXtended Programmable Logic Array)** architecture
- **Power Efficiency:** Low-power operation with **Zero Power (ZP) technology**
- **Macrocell Structure:** Each macrocell includes **flip-flops, product terms, and clocking options**
- **I/O Standards:** Supports **3.3V LVTTL/LVCMOS** and **5V-tolerant inputs**
### **Features:**
- **High-Speed Performance:** **12ns pin-to-pin delay**
- **Flexible I/O:** **5V-tolerant inputs** allow interfacing with legacy 5V systems
- **Low Power Consumption:** **Standby current as low as 50μA**
- **In-System Programmability (ISP):** Supports **JTAG-based programming**
- **Advanced Clocking:** Multiple clocking options, including **global and product-term clocks**
- **Security:** **Programmable security bit** to prevent unauthorized access
This CPLD is commonly used in applications requiring **glue logic, bus interfacing, and state machine control** in embedded systems.
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