AT27C256R-70TU

Product Overview

Category

AT27C256R-70TU belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is commonly used in electronic devices for storing permanent data that cannot be modified or erased. It provides non-volatile storage capabilities, making it ideal for applications where data integrity is crucial.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High capacity: The AT27C256R-70TU has a capacity of 256 kilobits (32 kilobytes).
• Fast access time: With a speed rating of 70 nanoseconds, it offers quick data retrieval.
• Low power consumption: This chip operates efficiently, consuming minimal power.
• Durable: The AT27C256R-70TU is designed to withstand harsh environmental conditions.

Package and Quantity

The AT27C256R-70TU is available in a standard 28-pin plastic dual in-line package (PDIP). It is typically sold in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Capacity: 256 kilobits (32 kilobytes)
• Access Time: 70 nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 28-pin PDIP

Pin Configuration

The AT27C256R-70TU follows the industry-standard pin configuration for PROM chips. The pinout diagram is as follows:

___________ | | A15 |1 28| Vcc A12 |2 27| OE# A7 |3 26| CE# A6 |4 25| I/O7 A5 |5 24| I/O6 A4 |6 23| I/O5 A3 |7 22| I/O4 A2 |8 21| I/O3 A1 |9 20| I/O2 A0 |10 19| I/O1 GND |11 18| I/O0 NC |12 17| WE# A14 |13 16| A8 A13 |14 15| A9 |___________|

Functional Features

• Read-only memory: The AT27C256R-70TU allows data to be read but not modified or erased.
• High-speed access: With a fast access time of 70 nanoseconds, it enables quick retrieval of stored data.
• Low power consumption: This chip operates efficiently, minimizing power requirements.
• Reliable storage: The non-volatile nature of PROM ensures data integrity over extended periods.

Advantages and Disadvantages

Advantages

• Non-volatile storage: Data remains intact even without power supply.
• High capacity: Offers ample storage space for various applications.
• Fast access time: Enables quick retrieval of data.
• Durable: Designed to withstand harsh environmental conditions.

Disadvantages

• Limited functionality: Data cannot be modified or erased once programmed.
• Higher cost compared to other memory technologies.

Working Principles

The AT27C256R-70TU is based on the principle of electrically programmable read-only memory (EPROM). It utilizes a grid of transistors to store data in a binary format. Once programmed, the stored data remains unchanged until the chip is replaced.

Detailed Application Field Plans

The AT27C256R-70TU finds applications in various electronic devices, including but not limited to: - Embedded systems - Automotive electronics - Industrial control systems - Medical equipment - Communication devices

Alternative Models

Several alternative models with similar functionality are available in the market. Some notable alternatives to the AT27C256R-70TU include: - AT28C256-15PU - AM27C256-150DC - M27C256B-12F1

These models offer comparable specifications and can be considered as suitable replacements for the AT27C256R-70TU.

In conclusion, the AT27C256R-70TU is a programmable read-only memory chip that provides non-volatile storage capabilities. With its high capacity, fast access time, and durability, it finds applications in various electronic devices. While it has limitations in terms of data modification, it offers reliable and secure data storage.