Lattice I22LV10-15LK: A Comprehensive Technical Overview of the 3V In-System Programmable CPLD

The Lattice I22LV10-15LK represents a specific member of the widely adopted ispLSI 2000VE family of 3.3V In-System Programmable (ISP) Complex Programmable Logic Devices (CPLDs). This device stands as a robust and flexible solution for a vast array of general-purpose logic integration tasks, particularly in power-sensitive and space-constrained applications. Its architecture is engineered to efficiently replace multiple fixed-function logic ICs, thereby reducing board space, component count, and overall system cost.

At the core of the I22LV10-15LK lies a high-performance electrically erasable CMOS technology. The "22LV10" denotes a device with 32 universal I/O pins and a logic density of 1000 PLD gates. The "-15" suffix indicates a pin-to-pin propagation delay of 15ns, ensuring swift signal processing and making it suitable for moderate to high-speed logic applications. Operating from a single 3.3V power supply, it is ideal for low-power systems and interfaces seamlessly with other modern 3.3V components.

A defining feature of this CPLD is its In-System Programmability (ISP). This capability allows designers to reprogram the device's logic functionality after it has been soldered onto a printed circuit board (PCB). This drastically simplifies the prototyping process, facilitates field upgrades, and enables rapid design iterations without the need to physically remove the component, saving significant time and cost during development and manufacturing.

The internal architecture is organized into a Global Routing Pool (GRP) connecting multiple Generic Logic Blocks (GLBs). Each GLB contains programmable AND/OR arrays and macrocells, providing a highly flexible and dense logic structure. The I/O cells are also programmable, supporting various pin configurations including LVTTL-compatible inputs and outputs, making it versatile for interfacing with a wide range of other digital circuits.

ICGOOODFIND: The Lattice Semiconductor ispLSI 22LV10-15LK is a highly reliable and cost-effective 3.3V CPLD solution. Its combination of deterministic timing, in-system programmability, and a well-established architecture makes it an excellent choice for integrating glue logic, implementing state machines, and handling address decoding and bus interfacing in countless consumer, industrial, and communications applications.

Keywords: In-System Programmable (ISP), CPLD, 3.3V Logic, Propagation Delay, Generic Logic Block (GLB)