The GAL20V8B-15LPI is a high-performance, Electrically Erasable Programmable Logic Device (EEPLD) manufactured by Lattice Semiconductor. It offers a flexible and cost-effective solution for implementing custom logic functions, replacing discrete TTL and CMOS logic circuits.

Applications

• Address Decoding: Used in memory systems for address decoding and chip selection.
• State Machine Implementation: Implements complex state machines for control and sequencing applications.
• Peripheral Control: Controls and interfaces with various peripheral devices, such as displays, keyboards, and sensors.
• Data Encryption/Decryption: Implements simple encryption and decryption algorithms for data security.
• Bus Interface Logic: Provides interface logic for connecting different buses in a system.

Features

• Electrically Erasable Technology: Allows for easy reprogramming and modification of the logic configuration.
• 20 Macrocells: Contains 20 configurable macrocells that can be individually configured as inputs, outputs, or bidirectional I/O pins.
• Programmable Output Polarity: Each output can be individually programmed as active-high or active-low.
• Low Power Consumption: Operates with low power consumption, making it suitable for battery-powered applications.
• Fast Propagation Delay: Offers a fast propagation delay of 15ns for high-speed operation.
• Input Transition Detection: Input transition detection capability for asynchronous logic applications.

Benefits

• Design Flexibility: Allows for easy implementation of custom logic functions.
• Reduced Component Count: Replaces multiple discrete logic devices, reducing board space and cost.
• Simplified Design Process: Simplifies the design process compared to designing with discrete logic gates.
• Faster Time to Market: Reduces development time and allows for faster time to market.
• Easy Reprogramming: Can be easily reprogrammed to change the logic configuration as needed.

Additional Details

The GAL20V8B-15LPI is programmed using a standard PLD programmer and supports industry-standard programming languages such as ABEL, CUPL, and VHDL. The "15" in the part number indicates a propagation delay of 15 nanoseconds. The "LPI" suffix typically denotes a low-power version in a Plastic Leaded Chip Carrier (PLCC) package, making it suitable for surface-mount assembly. The device operates on a 5V power supply. It's important to refer to the manufacturer's datasheet for detailed information on programming procedures, electrical characteristics, timing specifications, and package dimensions. The GAL20V8B offers a versatile and cost-effective solution for implementing custom logic in a wide range of applications. The electrically erasable technology provides a significant advantage in terms of flexibility and ease of design modifications. It is also possible to implement security features with the device, such as disabling readback to protect proprietary designs.