AT28C256-15JU

The AT28C256-15JU is a 32K x 8 (256 Kbit) parallel EEPROM, which stands for Electrically Erasable Programmable Read-Only Memory. This device is designed for easy integration into various applications requiring non-volatile storage, meaning data is retained even when power is removed. The "15" in its name indicates a maximum access speed of 150 nanoseconds, making it suitable for applications that require quick data retrieval.
Key features include byte-level read and write operations, a flexible write protection mechanism, and the ability to perform data retention for over ten years. The EEPROM operates at a voltage range of 4.5V to 5.5V, making it compatible with standard TTL interfaces. The JEDEC-approved 28-pin Dual In-line Package (DIP) or the PLCC surface-mount package options offer versatility in mounting and usage.
The AT28C256-15JU is widely used in microcontroller-based systems, embedded applications, and devices where firmware updates are necessary. Its reliability and ease of use make it a popular choice among engineers and developers.

The AT28C256-15JU is a 32KB (256Kb) EEPROM from Microchip Technology. Equivalent products include:
1. 28C256 series from other manufacturers like Microchip or STMicroelectronics.
2. SST39SF020A - a 256Kb flash memory from Microchip.
3. W29C020 from Winbond - a similar EEPROM in capacity.
4. M27C256B from STMicroelectronics - an EPROM with similar capacity.

Pin compatibility and electrical specifications should be verified for direct replacements.

The AT28C256-15JU is a 32K x 8 (256K) parallel EEPROM featuring a 150 ns access time, allowing fast read operations. It operates with a single 5V power supply and supports byte-level read and write, as well as chip erase functions. The EEPROM offers a high endurance of up to 100,000 write cycles per byte and a data retention period of 10 years, ensuring reliable data storage over time.
Key features include a built-in hardware data protection to prevent inadvertent writes, and a software data protection mechanism for enhanced security. The AT28C256-15JU also supports industry-standard JEDEC pinouts and is housed in a 28-pin PDIP, PLCC, or SOIC package, making it compatible with a wide range of applications. Its low power consumption, high reliability, and straightforward interface make it suitable for use in industrial, automotive, and consumer electronics for data storage and retrieval tasks.

The AT28C256-15JU is a 32K x 8 (256 Kbit) parallel EEPROM, and it comes in a 28-pin PLCC package. Below is a concise description of the pin functions:
1. A0-A14 (15 pins): Address inputs used to select one of the 32,768 memory locations.
2. DQ0-DQ7 (8 pins): Data input/output pins for data transfer to/from the device.
3. CE# (Chip Enable, 1 pin): Activates the device when low, enabling read and write operations.
4. OE# (Output Enable, 1 pin): Enables the output buffers when low during read operations.
5. WE# (Write Enable, 1 pin): Controls write operations; when low, data on DQ pins is written to the addressed location.
6. VCC (1 pin): Power supply pin.
7. GND (1 pin): Ground reference pin.
The AT28C256-15JU is commonly used in applications requiring non-volatile memory storage, such as embedded systems, where data retention without power is necessary.

The AT28C256-15JU is manufactured by Microchip Technology Inc. This company is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions. Microchip Technology is known for designing and manufacturing a wide range of semiconductor products that are used in various applications across consumer, automotive, industrial, and computing markets. The company focuses on providing innovative solutions that help reduce development time and lower total system costs for its customers.

The AT28C256-15JU is a 256K (32K x 8) parallel EEPROM used in various applications for non-volatile data storage. Its typical application areas include:
1. Embedded Systems: For firmware storage, configuration settings, and calibration data.
2. Consumer Electronics: In devices requiring persistent memory, such as remote controls and gaming consoles.
3. Industrial Controls: For storing machine settings and operational parameters.
4. Medical Devices: Where reliable data storage is critical for patient-related information.
5. Telecommunications: In network equipment for configuration and operational data.
6. Computers and Peripherals: Used in BIOS storage and other peripheral devices.
These applications benefit from the EEPROM's ability to retain data without power and to be reprogrammed electrically.

The AT28C256-15JU is an EEPROM (Electrically Erasable Programmable Read-Only Memory) integrated circuit in a 28-pin PLCC (Plastic Leaded Chip Carrier) package. This packaging is designed for surface mounting on a circuit board and is commonly used for applications requiring non-volatile memory storage.