STMicroelectronics M27C256B-90F6 EPROM

The M27C256B-90F6 is a high-speed 256 Kbit EPROM (Erasable Programmable Read-Only Memory) produced by STMicroelectronics. This memory device offers a storage capacity of 256 kilobits and is organized as 32,768 words by 8 bits. The '90F6' suffix in the model number indicates the speed grade of the EPROM, with an access time of 90 nanoseconds, making it suitable for high-performance applications where quick data retrieval is essential.

One of the key features of the M27C256B-90F6 is its UV (ultraviolet) light erasability. This means that the data stored in the device can be erased by exposing the chip's windowed ceramic package to UV light, providing users with the flexibility to reprogram the memory during the development cycle or when updates are needed. After erasure, the device can be reprogrammed with new data, making it a versatile choice for prototyping and small production runs.

STMicroelectronics has designed the M27C256B-90F6 with industry-standard features such as a two-line control function, which allows for easy memory expansion with multiple devices. The chip-select (CS) and output-enable (OE) control lines ensure low power consumption and a high noise immunity, typical of MOS technology.

The M27C256B-90F6 operates over a wide range of ambient temperatures, from 0°C to 70°C, making it reliable in various operating environments. Its power supply requirements are also standard, with a single 5V supply needed for both read and programming operations.

For programming, the M27C256B-90F6 is compatible with industry-standard programming equipment, and its programming algorithm requires only a single 5V power supply. This EPROM is also TTL compatible, which means it can be easily integrated into existing systems without the need for level conversion.

In summary, the M27C256B-90F6 from STMicroelectronics is a versatile and reliable EPROM chip that is suitable for a wide range of applications where data storage stability and endurance are critical. Its ease of use, coupled with the ability to be erased and reprogrammed multiple times, makes it an excellent choice for development, prototyping, and low-volume production needs.