Lattice LC4064V-5TN-75I: A Comprehensive Technical Overview of the Low-Power CPLD

The Lattice LC4064V-5TN-75I represents a specific member of the high-performance, low-power ispMACH® 4000ZE CPLD family from Lattice Semiconductor. Engineered for a wide array of general-purpose logic integration applications, this device stands out for its optimal balance of power consumption, density, and cost-effectiveness. It is particularly suited for portable, battery-operated, and power-sensitive designs where minimizing current draw is a critical design parameter.

At its core, the LC4064V-5TN-75I integrates 64 macrocells, providing a sufficient logic capacity to consolidate numerous discrete logic components, such as PALs, GALs, and standard logic gates, into a single, compact chip. This integration simplifies board design, reduces component count, and enhances overall system reliability. The architecture is based on a high-speed, flexible logic structure that supports complex combinatorial and sequential logic functions.

A defining characteristic of this CPLD is its ultra-low power consumption. Fabricated on an advanced CMOS process, the device features a 1.8V core voltage with 3.3V, 2.5V, or 1.8V I/O capability, making it ideal for mixed-voltage systems. The static power consumption (ICC) is exceptionally low, typically in the microamp (µA) range, which is crucial for extending battery life in portable electronics. The -5 in its part number denotes a 5ns pin-to-pin logic propagation delay, enabling its use in systems requiring moderate to high-speed logic operations.

The device packaging is a 75-pin Thin Plastic Quad Flat Pack (TQFP), noted as -5TN-75I. This surface-mount package offers a compact footprint, good thermal performance, and ease of manufacturability, fitting well in space-constrained applications. The "I" suffix indicates an industrial temperature grade, meaning the device is rated for operation from -40°C to +100°C, ensuring reliability in harsh environmental conditions.

In-system programmability (ISP) is a key feature, allowing the device to be reprogrammed on the board even after the final product has been assembled. This capability, managed through a standard JTAG (IEEE 1149.1) interface, facilitates rapid design iterations, field upgrades, and bug fixes, significantly reducing development time and cost.

Typical applications for the LC4064V-5TN-75I are diverse, including:

Power Management: Implementing sequencing and control logic.

Portable Devices: Used in handheld instruments, medical devices, and consumer electronics.

Communications: Serving as glue logic for interface bridging (e.g., between a processor and peripherals).

Industrial Control: Performing I/O expansion and simple state machine functions.

ICGOODFIND: The Lattice LC4064V-5TN-75I is a highly capable and efficient CPLD solution, offering an excellent combination of low static power, moderate logic density, and high reliability. Its industrial temperature rating and in-system programmability make it a versatile and robust choice for designers looking to integrate logic while prioritizing power savings and design flexibility in demanding environments.

Keywords: Low-Power CPLD, In-System Programmability (ISP), 64 Macrocells, 1.8V Core Voltage, Industrial Temperature Grade