AT27LV256A-55JI

Product Overview

Category: Integrated Circuit (IC)

Use: The AT27LV256A-55JI is a high-performance, low-power CMOS 256K (32K x 8) EPROM (Electrically Programmable Read-Only Memory) IC. It is designed for applications that require non-volatile memory storage with fast access times.

Characteristics: - High-performance CMOS technology - Low power consumption - Fast access time - Non-volatile memory storage - Durable and reliable

Package: The AT27LV256A-55JI is available in a 32-pin PLCC (Plastic Leaded Chip Carrier) package. This package provides protection to the integrated circuit and facilitates easy installation on printed circuit boards.

Essence: The essence of the AT27LV256A-55JI is its ability to store data permanently even when the power supply is disconnected. It offers fast and reliable access to stored information, making it suitable for various applications.

Packaging/Quantity: The AT27LV256A-55JI is typically sold in reels or tubes containing multiple units. The exact quantity depends on the supplier and customer requirements.

Specifications

• Memory Size: 256Kbits (32K x 8)
• Supply Voltage: 5V ±10%
• Access Time: 55ns
• Operating Temperature Range: -40°C to +85°C
• Input/Output Compatibility: TTL, CMOS
• Programming Voltage: 12.75V
• Erase Voltage: 25V
• Data Retention: 20 years

Pin Configuration

The AT27LV256A-55JI has a total of 32 pins. Below is the detailed pin configuration:

```

Pin Name Description

1 A14 Address Input 2 A12 Address Input 3 A7 Address Input 4 A6 Address Input 5 A5 Address Input 6 A4 Address Input 7 A3 Address Input 8 A2 Address Input 9 A1 Address Input 10 A0 Address Input 11 /OE Output Enable 12 /CE Chip Enable 13 NC No Connection 14 DQ0 Data Input/Output 15 DQ1 Data Input/Output 16 DQ2 Data Input/Output 17 DQ3 Data Input/Output 18 DQ4 Data Input/Output 19 DQ5 Data Input/Output 20 DQ6 Data Input/Output 21 DQ7 Data Input/Output 22 VCC Power Supply 23 A8 Address Input 24 A9 Address Input 25 A11 Address Input 26 A10 Address Input 27 A13 Address Input 28 /WE Write Enable 29 /PGM Program 30 /VPP Programming Voltage 31 GND Ground 32 NC No Connection ```

Functional Features

• Non-volatile memory storage: The AT27LV256A-55JI retains stored data even when the power supply is disconnected.
• Fast access time: With an access time of 55ns, it provides quick retrieval of information.
• Low power consumption: The IC operates efficiently with low power requirements.
• High-performance CMOS technology: It utilizes advanced CMOS technology for improved performance and reliability.

Advantages and Disadvantages

Advantages: - Permanent data storage - Fast access times - Low power consumption - Durable and reliable

Disadvantages: - Limited storage capacity (256Kbits) - Requires external programming voltage for programming and erasing

Working Principles

The AT27LV256A-55JI is based on EPROM technology. It uses a grid of transistors to store data in a non-volatile manner. The stored information can be accessed by providing the appropriate address inputs and enabling the chip. The IC operates with low power consumption, making it suitable for battery-powered devices.

Application Field Plans

The AT27LV256A-55JI finds applications in various fields, including: 1. Embedded systems 2. Industrial automation 3. Automotive electronics 4. Consumer electronics 5. Communication equipment

Alternative Models

Below are some alternative models that offer similar functionality to the AT27LV256A-55JI:

1. AT28C256-15PU: 256K (32K x 8) CMOS E2PROM, 150ns access time.
2. M27C256B-12F1: 256K (32K x 8)