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AT27C256R-70JU

Name: AT27C256R-70JU
Rating: 4.7 (12 reviews)

IC EPROM 256KBIT PARALLEL 32PLCC

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包 32-LCC(J-Lead)
資料表 AT27C256R-70JU DataSheet
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規格

Package	Tube
ProductStatus	Active
MemoryType	Non-Volatile
MemoryFormat	EPROM
Technology	EPROM - OTP
MemorySize	256Kb (32K x 8)
MemoryInterface	Parallel
AccessTime	70 ns
Voltage-Supply	4.5V ~ 5.5V
OperatingTemperature	-40°C ~ 85°C (TC)
MountingType	Surface Mount
Package/Case	32-LCC (J-Lead)

概述

Description

The AT27C256R-70JU is a 32KB (256Kb) EEPROM (Electrically Erasable Programmable Read-Only Memory) developed by Microchip Technology. It is organized as 32K x 8 bits, making it suitable for applications requiring non-volatile storage of data and code. The "R" in its name indicates that it is a reprogrammable version, while "70" denotes a maximum access time of 70 nanoseconds, ensuring quick read operations.
This device is primarily utilized in embedded systems, microcontroller applications, and consumer electronics. It features a 28-pin DIP or surface-mount package, allowing for versatile integration into various circuit designs. The AT27C256R-70JU supports both byte and page programming, enhancing its usability for developers. Additionally, it employs a dual in-line package (DIP) configuration, making it easy to handle in prototyping.
Overall, the AT27C256R-70JU is valued for its reliability, speed, and ease of use in scenarios that demand persistent data retention.

Features

The AT27C256R-70JU is a 256 Kbit (32 K x 8) EEPROM (Electrically Erasable Programmable Read-Only Memory) device from Microchip Technology. Key features include:
1. Memory Organization: 32 K x 8 bits, allowing for versatile data storage.
2. Access Time: 70 ns, enabling fast read operations suitable for various applications.
3. Operating Voltage: Typically operates from 4.5V to 5.5V, compatible with standard digital circuits.
4. Data Retention: Retains data for at least 20 years, ensuring long-term reliability.
5. Programmable: Offers byte-wise programming capability, making it flexible for various data writing needs.
6. EEPROM Technology: Supports electronic erasure and reprogramming without the need for UV exposure.
7. Package Type: Available in various packages, including DIP and SOIC, to fit different design requirements.
These features make the AT27C256R-70JU suitable for applications in consumer electronics, automotive systems, and industrial control.

Package

The AT27C256R-70JU is packaged in a 28-pin dual in-line package (DIP) form factor.

Pinout

The AT27C256R-70JU is a 256 Kbit (32 K x 8) EEPROM with a pin count of 28. It operates using a parallel interface and is primarily used for non-volatile memory applications.
### Pin Functions:
1. A0-A14: Address Inputs (14 pins) - Used to select one of 32,768 bytes.
2. D0-D7: Data Inputs/Outputs (8 pins) - Bi-directional data bus for reading and writing data.
3. Vcc: Power Supply (+5V) - Provides the operating voltage.
4. GND: Ground - Common reference point.
5. OE: Output Enable - Activates output buffers when low.
6. CE: Chip Enable - Activates the chip when low.
7. WE: Write Enable - Allows writing data when low.
8. NC: Not Connected - No internal connection.
This device is suitable for applications requiring reliable storage of program code or data.

Manufacturer

The AT27C256R-70JU is manufactured by Microchip Technology Inc. Microchip is a publicly traded company specializing in embedded control solutions, including microcontrollers, analog semiconductors, and memory products. Founded in 1989, Microchip is known for its focus on low-power, high-performance devices used in a variety of applications, including automotive, industrial, consumer, and communications markets. The AT27C256 series is a type of EEPROM (Electrically Erasable Programmable Read-Only Memory) that provides non-volatile storage, widely utilized in electronic devices for firmware and data storage. Microchip Technology is recognized for its innovation and comprehensive product offerings, supporting a global customer base.

Application

The AT27C256R-70JU is a UV erasable EPROM used in various applications such as embedded systems, firmware storage, and programmable logic devices. It is commonly utilized in telecommunications, automotive electronics, consumer electronics, and industrial controls. Its non-volatile memory feature makes it suitable for applications requiring data retention after power loss.

Equivalent

The AT27C256R-70JU is a 256 Kbit (32 K x 8) EEPROM. Equivalent products include the AMD AM27C256-70, Microchip 27C256, and STMicroelectronics M27C256. When looking for compatibility, ensure the voltage and packaging match: typically 5V, 28-pin DIP. Check datasheets for specific timing and performance characteristics.