The NM27C128BQ-200 is a 128K (16K x 8) electrically Programmable Read-Only Memory (EPROM) manufactured by National Semiconductor (now Texas Instruments). It is a non-volatile memory device, meaning it retains its data even when power is removed. The '200' indicates an access time of 200ns.

Applications

• Embedded systems requiring non-volatile storage
• Microcontroller program storage
• Firmware storage
• Industrial control systems
• Consumer electronics

Features

• 128K (16K x 8) Memory Organization: Provides 131,072 bits of storage.
• Fast Access Time: 200ns access time allows for rapid data retrieval.
• Single +5V Power Supply: Operates from a single 5-volt power supply.
• TTL Compatible Inputs/Outputs: Interfaces easily with TTL logic circuits.
• Three-State Output: Allows for easy memory expansion.
• Electrically Programmable: Can be programmed using a standard EPROM programmer.
• UV Erasable: Can be erased using ultraviolet light and reprogrammed.

Benefits

• Non-Volatile Storage: Data is retained even when power is off.
• Fast Data Retrieval: Quick access time ensures efficient system performance.
• Easy Integration: TTL compatibility simplifies interfacing with other components.
• Flexibility: Electrically programmable and UV erasable for prototyping and development.
• Reliable Operation: Designed for robust performance in a variety of environments.

Additional Details

The NM27C128BQ-200 is typically packaged in a 28-pin ceramic DIP (Dual In-line Package) with a quartz window for UV erasure. It requires a programming voltage (VPP) of 12.5V for programming. The operating temperature range is typically 0°C to +70°C. This EPROM is suitable for applications where moderate storage capacity, fast access time, and reprogrammability are required.