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AT27C256R-70PU

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

IC EPROM 256KBIT PARALLEL 28DIP

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製造商。部分 #AT27C256R-70PU
包 PDIP-28
資料表 AT27C256R-70PU 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	Through Hole
Package/Case	28-DIP (0.600, 15.24mm)

概述

Description

The AT27C256R-70PU is a 32K x 8-bit ultraviolet erasable programmable read-only memory (EPROM) chip produced by Microchip Technology. It features a 256 Kbit storage capacity, making it suitable for applications requiring non-volatile data storage. Key characteristics include a maximum access time of 70 nanoseconds, which ensures quick data retrieval.
This EPROM operates on a supply voltage of 5V and can be erased by exposing it to UV light through a transparent window on the chip. It has a standard 28-pin dual in-line package (DIP) for easy integration into circuits. The AT27C256R-70PU is commonly used in embedded systems, firmware storage, and applications where data integrity is critical during power loss. Its reliability and reprogrammability make it a popular choice in legacy systems and niche applications.

Features

The AT27C256R-70PU is a high-performance EEPROM (Electrically Erasable Programmable Read-Only Memory) device with the following key features:
1. Memory Size: 256 Kbits (32 Kbytes) organized as 32K x 8 bits.
2. Access Time: 70 ns, providing fast read operations.
3. Operating Voltage: 4.5V to 5.5V, compatible with standard logic levels.
4. Programming: Supports byte programming and can be programmed in-system.
5. Endurance: Typically 1,000,000 write/erase cycles per byte.
6. Data Retention: Guaranteed for at least 20 years.
7. Pin Configuration: 28-pin DIP package, making it easy to integrate into various applications.
8. Erase Capability: Supports bulk erase, allowing the entire memory to be erased simultaneously.
9. Low Power Consumption: Designed for low standby and active current consumption.
This device is commonly used in applications requiring non-volatile storage for firmware, configuration data, and other critical information.

Package

The AT27C256R-70PU is packaged in a 28-pin plastic DIP (Dual In-line Package) format. This package type allows for easy mounting on circuit boards and is commonly used in various electronic applications.

Pinout

The AT27C256R-70PU is a 32K x 8-bit EEPROM with a pin count of 28. It is part of the AT27C256 family of devices, which are UV-erasable programmable read-only memory (EPROM) chips.
Pin Function Summary:
1. A0 - A14: Address Inputs (15 address lines for accessing 32K locations)
2. D0 - D7: Data Inputs/Outputs (8-bit bi-directional data bus)
3. Vcc: Power Supply (typically +5V)
4. GND: Ground
5. OE: Output Enable (active low, enables data output)
6. CE: Chip Enable (active low, enables the device)
7. WE: Write Enable (active low, initiates writing to the memory)
8. Vpp: Programming Voltage (not required for this device in normal operation)
This configuration allows the chip to be read from, written to, and erased under specific conditions.

Manufacturer

The AT27C256R-70PU is manufactured by Microchip Technology Inc. Microchip is a leading provider of microcontroller, mixed-signal, analog, and memory semiconductor products. Founded in 1989, the company specializes in developing microcontrollers and integrated circuits for a variety of applications, including automotive, industrial, and consumer electronics. Microchip is known for its extensive portfolio of products, robust design resources, and support services, serving both large enterprises and small businesses in the electronics industry. The AT27C256R-70PU itself is an EEPROM (Electrically Erasable Programmable Read-Only Memory) device used in various applications requiring non-volatile data storage.

Application

The AT27C256R-70PU is a 32K x 8-bit EEPROM primarily used in applications such as microcontroller programming, firmware storage, embedded systems, and data logging. Its non-volatile memory allows it to retain information without power, making it suitable for automotive electronics, telecommunications, consumer electronics, and industrial applications where data integrity is crucial.

Equivalent

The AT27C256R-70PU is a UV EPROM chip. Equivalent products include:
1. 28C256 - EEPROM with similar capacity and functionality.
2. M27C256 - STMicroelectronics version.
3. AM27C256 - AMD version.
4. D27C256 - Datalight version.
Ensure to check pin compatibility and electrical specifications when substituting.