The AT27C040-90PU is a high-quality EPROM (Erasable Programmable Read-Only Memory) microchip by Microchip Technology. It offers a one-time programmable memory capacity of 4Mbit, equivalent to 512K x 8 bits. With a fast access time of 90ns, it ensures efficient data retrieval for your applications.This microchip comes in a 32-Pin PDIP (Plastic Dual-In-Line Package) with a convenient tube packaging. The PDIP package provides easy integration into your circuit boards and ensures secure connections.The AT27C040-90PU is an ideal choice for applications that require reliable and non-volatile memory storage, such as embedded systems, microcontrollers, and automotive electronics. It is designed to resist data loss or corruption, making it suitable for critical or long-term memory requirements.Trust Microchip Technology's AT27C040-90PU EPROM microchip for robust and durable memory solutions in your electronic designs.