MICROCHIP AT27C020-90PU OTP EPROM, 2Mbit (256K x 8), 90ns, DIP-32, 4.5-5.5V

The MICROCHIP AT27C020-90PU is a 2,097,152-bit low-power, high-performance One-Time Programmable Read-Only Memory (OTP EPROM) integrated circuit. Organised as 256k by 8-bit, it offers a reliable and fast storage solution for system firmware, eliminating the delays associated with traditional mass storage media. With a fast 90ns access time, any byte can be accessed in under 55ns, removing the need for speed-reducing wait states in high-performance microprocessor systems.

Operating on a single 5V power supply (±10%) in normal read mode, this IC is designed for efficiency. It typically consumes just 8mA during active read operations, while its standby mode supply current is exceptionally low at less than 10µA (100µA maximum), making it ideal for power-sensitive applications.

The device is housed in a 32-pin Dual In-line Package (DIP) and features a two-line control (CE, OE) architecture. This provides designers with essential flexibility to prevent bus contention and ensure clean system integration. Built with high-reliability CMOS technology, it includes robust 2000V ESD protection for enhanced durability.

Key Features

• Fast Access: 55ns read access time for high-speed operation.
• Low Power: CMOS operation with a maximum of 100µA in standby mode.
• Wide Voltage Range: Operates from 4.5V to 5.5V.
• High Reliability: 2000V ESD protection and industrial-grade construction.
• Efficient Programming: Rapid programming algorithm (typically 100µs per byte).
• Broad Compatibility: CMOS and TTL compatible inputs and outputs.
• Extended Temperature Range: Suitable for industrial and automotive environments (-40°C to +85°C).
• Integrated Identification: Features a product identification code.

With its 256kB storage capability, the AT27C020-90PU allows critical firmware to be stored securely and accessed instantly by the host system,.