The MX27C256DC-90 is a 256K-bit, one-time programmable read-only memory (OTP ROM) manufactured by Macronix. This device is organized as 32K x 8 bits and offers fast access times, making it suitable for storing firmware, boot code, and character fonts in various embedded systems.

Applications

• Embedded systems for storing firmware and boot code
• Character font storage in printers and displays
• Program storage in microcontroller-based systems
• Industrial control equipment for storing configuration data
• Consumer electronics for storing application software

Features

• Organized as 32K x 8 bits
• Fast access time: 90 ns
• Single 5V power supply
• Low power consumption: typically 30 mA active, 100 μA standby
• TTL compatible inputs and outputs
• Three-state output
• Available in DIP and SOP packages

Benefits

• Non-volatile storage ensures data retention even when power is off.
• Fast access time allows for quick retrieval of stored data.
• Low power consumption extends battery life in portable applications.
• TTL compatibility simplifies interfacing with other digital circuits.
• One-time programmability provides secure program storage.
• Wide operating temperature range allows use in various environments.

Technical Specifications

The MX27C256DC-90 operates from a single 5V power supply. It features address inputs, data outputs, chip enable (CE), and output enable (OE) control signals. Programming is achieved by applying a high voltage to the programming pins while selecting the desired address and data. The device is typically packaged in a 28-pin DIP or SOP package. It is designed for applications requiring non-volatile storage, high speed, and low power consumption. Detailed programming procedures can be found in the manufacturer's datasheet. Because it is one-time programmable, careful planning is required during the development process to avoid errors.