Microchip 1 MB EPROM 44-Pin PLCC Memory Chip AT27C1024-45JU

Microchip AT27C1024-45JU is a 1 MB EPROM chip supplied in a 44-pin PLCC package, engineered for electronic component applications requiring reliable, non-erasable memory storage. This OTP (One Time Programmable) EPROM offers stable data retention with an organisation of 64K x 16 bit and a parallel interface, delivering efficient read access at speeds up to 45 nanoseconds.

Its through-hole mount type and compact dimensions (16.6mm length and width, 4.4mm height) make it compatible with numerous PCB designs in industrial, communication, and computing devices. Operating voltage ranges from 4.5V to 5.5V, ensuring stable performance with low supply current consumption of 100μA, suitable for power-sensitive applications.

The device is rated for a wide operating temperature spectrum from -40°C to 85°C, making it appropriate for use in harsh environments such as industrial machinery and automotive electronics where non-volatile data storage with high reliability is required. This EPROM does not support in-system programmability and lacks automotive certification, emphasizing its intended use in embedded non-reprogrammable coding or firmware storage.

Key features include a durable PLCC 44-pin package, OTP reprogramming technique, and standard memory organisational structure common in modern electronics manufacturing processes. Though it lacks erasing functionality, it simplifies production lines by providing a cost-effective memory solution with guaranteed data integrity over the product lifecycle.

The memory size is 1MB, organised as 64K x 16 bit for efficient data storage. Parallel interface facilitates easy integration into electronic circuits. OTP reprogramming technique ensures permanent data storage after programming.

Operates over a supply voltage range of 4.5V to 5.5V for reliable operation. Wide operating temperature range of -40°C to 85°C supports harsh environments. Compact 44-pin PLCC package suitable for through-hole mounting on PCBs.

Fast maximum random access time of 45 nanoseconds enhances device speed. Low supply current of 100μA supports energy-efficient designs. Robust non-erasable memory ideal for embedded and industrial applications. Designed without automotive standards, focusing on general electronic applications.

This Microchip EPROM is well-suited for applications in industrial control systems, embedded firmware storage, communication devices, and other electronic products where secure, permanent memory is required without the need for reprogramming after the initial programming phase.

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