High Density Programmable Logic The **ISPLSI3256-70LM** is a high-density programmable logic device (PLD) manufactured by **Lattice Semiconductor**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Device Type:** In-System Programmable Large Scale Integration (ISPLSI)
- **Family:** 3000 Series
- **Logic Cells:** 256
- **Gates:** 6000
- **Speed Grade:** -70 (70 ns pin-to-pin delay)
- **Package:** 68-pin PLCC (Plastic Leaded Chip Carrier)
- **Operating Voltage:** 5V
- **I/O Pins:** 64
- **Maximum Frequency:** ~111 MHz (estimated)
- **Programmability:** In-system programmable (ISP) via IEEE 1149.1 (JTAG)
- **Technology:** E²CMOS (Electrically Erasable CMOS)
### **Descriptions:**
- The **ISPLSI3256-70LM** is a high-performance, high-density PLD designed for complex logic applications.
- It features a flexible architecture with programmable logic blocks, macrocells, and global routing resources.
- Supports in-system programming (ISP), allowing for easy field upgrades.
- Suitable for applications requiring medium-to-high logic integration.
### **Features:**
- **High Density:** 6000 gates with 256 logic cells.
- **Flexible I/O:** 64 I/O pins with programmable slew rate control.
- **JTAG Support:** IEEE 1149.1 compliant for boundary scan testing and programming.
- **E²CMOS Technology:** Non-volatile, reprogrammable memory.
- **Macrocell Architecture:** Supports wide input logic functions.
- **Global Routing Pool (GRP):** Provides efficient signal distribution.
- **5V Operation:** Compatible with standard TTL levels.
- **Security Fuse:** Prevents unauthorized access to programmed logic.
This device is commonly used in digital systems, telecommunications, industrial control, and embedded applications.
(Note: For detailed timing, power consumption, or application-specific details, refer to the official Lattice datasheet.)
