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AT28C256-15JU

Name: AT28C256-15JU
Rating: 4.7 (12 reviews)

IC EEPROM 256KBIT PAR 32PLCC

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規格

Part Status	Active
DigiKey Programmable	Not Verified
Memory Type	Non-Volatile
Memory Format	EEPROM
Technology	EEPROM
Memory Size	256Kbit
Memory Organization	32K x 8
Memory Interface	Parallel
Write Cycle Time - Word, Page	10ms
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TC)
Mounting Type	Surface Mount
Package / Case	32-LCC (J-Lead)
Supplier Device Package	32-PLCC (13.97x11.43)
Base Product Number	AT28C256
Access Time	150 ns

概述

Description

The AT28C256-15JU is a 256 Kbit (32 K x 8) Electrically Erasable Programmable Read-Only Memory (EEPROM) chip. It operates in a dual in-line package (DIP) and is designed for applications requiring non-volatile memory storage, such as firmware and boot code. The "15" in the part number indicates a maximum access time of 150 nanoseconds, making it suitable for relatively fast data retrieval.
This EEPROM can be programmed and erased in-system, allowing for flexible updates without the need for removal. It features a simple interface with standard EEPROM commands for read, write, and erase operations. The AT28C256-15JU is compatible with various microcontrollers and is commonly used in embedded systems, telecommunications, and consumer electronics.
Its characteristics include a low power consumption, a wide operating voltage range (typically 4.5V to 5.5V), and high endurance with over 1 million write/erase cycles. This makes it a reliable choice for long-term data storage needs in a variety of electronic designs.

Features

The AT28C256-15JU is a 256 Kbit (32 K x 8) EEPROM (Electrically Erasable Programmable Read-Only Memory) from Microchip Technology. Key features include:
1. Memory Organization: 32K x 8 bits, allowing for storage of 32 kilobytes of data.
2. Access Time: 150 ns maximum, enabling fast data retrieval.
3. Power Supply: Operates at 5V ±10%, suitable for various applications.
4. Programmable and Erasable: Supports byte-wise programming and complete chip erasure.
5. Endurance: Up to 1 million write/erase cycles per byte, ensuring durability.
6. Data Retention: Guaranteed data retention for at least 20 years.
7. Interface: Parallel interface for easy integration with microcontrollers.
8. Single Power Supply Operation: Simplifies designs by requiring only one power source.
9. Temperature Range: Typically operates over a standard range of 0°C to 70°C.
These features make the AT28C256-15JU suitable for applications such as firmware storage, configuration data, and other non-volatile memory needs.

Package

The AT28C256-15JU is packaged in a 28-pin Dual In-Line Package (DIP).

Pinout

The AT28C256-15JU is a 32K x 8 (256K-bit) EEPROM with a total of 28 pins. Its pin configuration includes the following key functions:
1. A0 - A14 (Pins 1-14): Address input pins used to select one of the 32K memory locations.
2. D0 - D7 (Pins 15-22): Data input/output pins for reading and writing data.
3. CE (Pin 23): Chip Enable. Activates the memory when low.
4. OE (Pin 24): Output Enable. Activates the output buffers when low.
5. WE (Pin 25): Write Enable. Allows writing to the memory when low.
6. GND (Pin 26): Ground connection.
7. VCC (Pin 27): Supply voltage, typically +5V.
8. NC (Pin 28): No Connect, not internally connected.
The AT28C256-15JU operates with a maximum access time of 150 ns and is commonly used in applications requiring non-volatile storage.

Manufacturer

The AT28C256-15JU is manufactured by Microchip Technology Inc. Microchip is a leading American company that specializes in the design and manufacturing of microcontrollers, memory chips, and analog semiconductors. Founded in 1989, Microchip is renowned for its innovative embedded control solutions and has a broad portfolio of products used in various applications, including automotive, industrial, consumer, and communication sectors. The AT28C256-15JU is a 256 Kbit EEPROM (Electrically Erasable Programmable Read-Only Memory) device that provides non-volatile memory storage. Microchip focuses on delivering high-quality, reliable products, along with comprehensive development tools and support for engineers and designers in the electronics industry.

Application

The AT28C256-15JU is a 256Kb EEPROM used in various application areas, including embedded systems, consumer electronics, automotive electronics, telecommunications, and industrial automation. It serves for data storage, firmware updates, configuration settings, and program storage in devices where non-volatile memory is essential. Its fast access time and reliability make it suitable for applications requiring quick read and write operations.

Equivalent

The AT28C256-15JU is a 256Kb (32KB) EEPROM. Equivalent products include:
1. M27C256
2. NM27C256
3. W27C256
4. AM27C256
5. ST M27C256
These chips offer similar specifications, including storage capacity and access times. Always verify compatibility with your specific application.