AT27C040-90PU

The AT27C040-90PU is a high-performing 4-megabit (512K x 8) EPROM (erasable programmable read-only memory) IC manufactured by Atmel Corporation. It is designed for use in a variety of microprocessor-based systems and provides reliable, non-volatile storage for program code and data.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

• A16 - A19: Address Inputs
• OE# - Output Enable Input
• CE# - Chip Enable Input
• WE# - Write Enable Input
• D0 - D7: Data Input/Output
• VCC: Positive Power Supply
• GND: Power Ground

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the AT27C040-90PU IC for a visual representation.

Key Features

• High Density: The AT27C040-90PU offers a 4-megabit (512K x 8) capacity, providing ample storage for microprocessor-based systems.
• Fast Access Time: With a 90ns access time, this IC offers high-speed performance, ensuring quick data retrieval in digital systems.
• Low Power Consumption: The AT27C040-90PU's low-power CMOS technology minimizes power consumption, making it suitable for battery-powered applications.
• Non-Volatile Memory: This IC is non-volatile, meaning that its contents remain intact even without power, ensuring reliable and long-lasting data storage.
• Easy Programming: Programming the AT27C040-90PU is easy and straightforward using industry-standard programming equipment.
• Extended Temperature Range: This IC can operate under a wide temperature range of -40°C to 85°C, making it suitable for use in harsh environments.

Note: For detailed technical specifications, please refer to the AT27C040-90PU datasheet.

Application

• Microprocessor-Based Systems: The AT27C040-90PU is commonly used in microcontroller-based systems, providing non-volatile storage for program code and data.
• Industrial Control Systems: This IC is suitable for use in industrial control systems where reliable and permanent storage of program code and data is required.
• Instrumentation and Measurement Systems: The AT27C040-90PU can be used for data storage in various instrumentation and measurement systems, such as data loggers and sensors.

Functionality

The AT27C040-90PU is a high-density EPROM IC designed for use in microprocessor-based systems. It provides reliable and non-volatile storage for program code and data, ensuring long-lasting data retention even without power.

Usage Guide

• Power Supply: Connect VCC (Pin 8) to the positive power supply and GND (Pin 1) to ground.
• Addressing: Apply the appropriate binary address to the A16-A19 pins to select the desired memory location.
• Read Operation: Apply a low signal to CE# and OE# pins, then the data at the selected memory location appears on the D0-D7 pins.
• Programming: The AT27C040-90PU can be programmed using industry-standard programming equipment.

Frequently Asked Questions

Q: Can the AT27C040-90PU be reprogrammed?
A: No, the AT27C040-90PU is an EPROM IC, meaning that it can be programmed only once and cannot be reprogrammed.

Q: What is the maximum supply voltage for the AT27C040-90PU?
A: The AT27C040-90PU can operate with a supply voltage ranging from 4.5V to 5.5V.