The NM27C256Q is a 256K (32K x 8) electrically Programmable Read-Only Memory (EPROM) from National Semiconductor (now Texas Instruments). This EPROM provides a non-volatile storage solution for program code and data in a wide variety of embedded systems. It is known for its reliability, ease of programming, and compatibility with standard microprocessor interfaces.

Applications

• Embedded systems firmware storage
• Microcontroller program memory
• Industrial control systems
• Instrumentation
• Data logging applications

Features

• 256K (32K x 8) memory organization
• Fast access time
• Low power consumption
• TTL compatible inputs and outputs
• Easy programming with standard EPROM programmers
• Three-state output

Benefits

• Non-volatile storage ensures data retention even when power is removed.
• Fast access time enables quick program execution.
• Low power consumption reduces system power requirements.
• Easy integration with microprocessors and microcontrollers.
• Reliable storage for critical program code.

Additional Details

The NM27C256Q requires a +5V power supply for operation. The access time is typically 150ns. The device is programmed using a standard EPROM programmer. The programming voltage is typically 12.5V. The EPROM is available in a 28-pin DIP package. The three-state output allows for easy memory expansion and bus sharing. The operating temperature range is typically 0°C to +70°C. The NM27C256Q offers a cost-effective and reliable solution for non-volatile memory storage in embedded applications. This EPROM provides ample storage for programs and data, allowing for flexible system designs.