The NM27C128QE-200 is a 128K (16K x 8) UV Erasable PROM (EPROM) manufactured by Texas Instruments (TI), formerly National Semiconductor. It's a non-volatile memory device that stores data which can be erased using ultraviolet light and then reprogrammed. This EPROM is commonly used in applications requiring infrequently updated firmware or program code. The '200' in the part number indicates an access time of 200ns.

Applications

• Embedded Systems: Used for storing firmware in various embedded systems such as industrial control systems, instrumentation, and communication equipment.
• Microcontroller-Based Systems: Stores program code for microcontrollers in applications like consumer electronics, appliances, and automotive systems.
• Programmable Logic Devices (PLDs): Can be used to store configuration data for older PLDs.
• Development and Prototyping: Ideal for storing code during the development and prototyping stages due to its erasable and reprogrammable nature.
• Legacy Systems: Can be found in older computer systems and electronic devices that rely on EPROM technology.

Features

• 128K (16K x 8) EPROM: Provides 131,072 bits of non-volatile memory.
• UV Erasable: Data can be erased using ultraviolet light, allowing for reprogramming.
• Access Time: 200 ns: Provides a relatively fast access time for data retrieval.
• Single 5V Supply: Operates on a single 5V power supply.
• TTL Compatible Inputs and Outputs: Directly interfaces with TTL logic circuits.
• Three-State Output: Supports three-state output for easy connection to a microprocessor bus.
• Low Power Consumption: Consumes relatively low power, suitable for battery-powered or energy-sensitive applications.
• DIP Package: Typically available in a standard DIP (Dual In-line Package) for ease of prototyping and development.

Benefits

• Non-Volatile Storage: Retains data even when power is removed, ensuring reliable storage of firmware or program code.
• Reprogrammable: Can be erased and reprogrammed, allowing for updates and modifications to the stored data.
• Ease of Use: Simple programming and interfacing requirements make it easy to use in a variety of applications.
• Reliability: Offers reliable data storage and retrieval.
• Cost-Effective: A cost-effective solution for non-volatile memory in applications that do not require frequent updates.

Technical Specifications

Key technical specifications for the NM27C128QE-200 EPROM include:

• Memory Size: 128K (16K x 8)
• Access Time: 200 ns
• Supply Voltage: 5V
• Operating Temperature Range: Typically 0°C to +70°C (commercial grade)
• Package: DIP-28
• Programming Voltage: Approximately 12.5V
• Erasure Wavelength: 253.7 nm (UV light)