AT27C2048-90JU

Product Overview

Category

AT27C2048-90JU belongs to the category of programmable read-only memory (PROM) chips.

Use

This chip is primarily used for storing data that needs to be permanently written and cannot be modified or erased. It is commonly employed in applications where non-volatile memory is required.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C2048-90JU has a capacity of 2,048 kilobits (256 kilobytes).
• Fast access time: With an access time of 90 nanoseconds, it provides quick retrieval of data.
• Low power consumption: The chip operates on low power, making it suitable for battery-powered devices.

Package

The AT27C2048-90JU is available in a 32-pin PLCC (Plastic Leaded Chip Carrier) package.

Essence

The essence of this PROM chip lies in its ability to store data permanently, ensuring reliable and secure data storage.

Packaging/Quantity

The AT27C2048-90JU is typically packaged in reels containing multiple units. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Memory Type: Programmable Read-Only Memory (PROM)
• Capacity: 2,048 kilobits (256 kilobytes)
• Access Time: 90 nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 32-pin PLCC

Detailed Pin Configuration

The AT27C2048-90JU features a 32-pin configuration with the following pin functions:

1. A0-A16: Address Inputs
2. CE: Chip Enable
3. OE: Output Enable
4. WE: Write Enable
5. VCC: Power Supply
6. GND: Ground 7-30. Data Inputs/Outputs (DQ0-DQ15)
7. NC: No Connection
8. VPP: Programming Voltage

Functional Features

• Non-volatile storage: The AT27C2048-90JU retains data even when power is removed.
• High-speed access: With an access time of 90 nanoseconds, it provides quick retrieval of stored data.
• Easy integration: The chip can be easily integrated into existing electronic systems due to its standard pin configuration.
• Low power consumption: The chip operates on low power, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• Permanent data storage ensures data integrity.
• Fast access time allows for efficient data retrieval.
• Easy integration into existing systems.
• Low power consumption extends battery life in portable devices.

Disadvantages

• Inability to modify or erase stored data limits flexibility.
• Limited storage capacity compared to other memory technologies.
• Higher cost per unit compared to volatile memory options.

Working Principles

The AT27C2048-90JU utilizes a one-time programmable memory technology. During the manufacturing process, the desired data is permanently written onto the memory cells using a high voltage programming signal. Once programmed, the data remains unchanged until the chip reaches its maximum specified erase/write cycles.

Detailed Application Field Plans

The AT27C2048-90JU finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices. 2. Automotive electronics: Employed for storing critical data such as calibration parameters and firmware in automotive control units. 3. Industrial automation: Utilized for storing configuration data and program code in industrial control systems. 4. Medical devices: Used for storing patient data, firmware, and configuration settings in medical equipment.

Detailed and Complete Alternative Models

1. AT27C4096-90JU: A similar PROM chip with double the capacity (4,096 kilobits).
2. AT28C256-15PU: An electrically erasable programmable read-only memory (EEPROM) chip with a capacity of 256 kilobits.
3. AM29F040B-90JC: A flash memory chip with a capacity of 4 megabits (512 kilobytes).

These alternative models offer different capacities and erase/write capabilities to suit specific application requirements.

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