AT28C64B-15PC

Product Overview

Category

AT28C64B-15PC belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is primarily used for non-volatile data storage in various electronic devices such as microcontrollers, computers, and consumer electronics.

Characteristics

• Electrically erasable: The AT28C64B-15PC can be erased and reprogrammed electrically, making it convenient for updating stored data.
• Non-volatile: The stored data remains intact even when power is removed.
• High capacity: This chip has a storage capacity of 64 kilobits (8 kilobytes), allowing for ample data storage.
• Low power consumption: The AT28C64B-15PC operates on low power, making it suitable for battery-powered devices.
• Fast access time: With a maximum access time of 150 nanoseconds, this chip ensures quick retrieval of stored data.

Package and Quantity

The AT28C64B-15PC is available in a 28-pin plastic dual in-line package (PDIP). It is commonly sold in quantities of one or more.

Specifications

• Memory capacity: 64 kilobits (8 kilobytes)
• Supply voltage: 4.5V to 5.5V
• Access time: 150 nanoseconds
• Operating temperature range: -40°C to +85°C
• Data retention: 10 years
• Endurance: 1,000,000 write cycles

Pin Configuration

The AT28C64B-15PC has a total of 28 pins, each serving a specific function. The pin configuration is as follows:

```

Pin Name Description

1 A12 Address input 2 A7 Address input 3 A6 Address input 4 A5 Address input 5 A4 Address input 6 A3 Address input 7 A2 Address input 8 A1 Address input 9 A0 Address input 10 VCC Power supply 11 OE# Output enable 12 CE# Chip enable 13 WE# Write enable 14 I/O0 Data input/output 15 I/O1 Data input/output 16 I/O2 Data input/output 17 I/O3 Data input/output 18 I/O4 Data input/output 19 I/O5 Data input/output 20 I/O6 Data input/output 21 I/O7 Data input/output 22 NC No connection 23 NC No connection 24 GND Ground 25 A8 Address input 26 A9 Address input 27 A11 Address input 28 A10 Address input ```

Functional Features

• Byte-wise programmable: The AT28C64B-15PC allows individual bytes to be programmed or erased, providing flexibility in data manipulation.
• Hardware and software protection: This chip offers various protection mechanisms to prevent accidental writes or unauthorized access to stored data.
• High reliability: With its non-volatile nature and high endurance, the AT28C64B-15PC ensures reliable data storage and retrieval.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable
• Non-volatile data storage
• High capacity
• Low power consumption
• Fast access time

Disadvantages

• Relatively higher cost compared to other memory technologies
• Limited endurance compared to some newer memory technologies

Working Principles

The AT28C64B-15PC utilizes a floating-gate transistor structure to store data. When programming, an electric charge is applied to the floating gate, altering its electrical characteristics and storing the desired data. Erasing is achieved by removing the charge from the floating gate. The chip's control signals (CE#, OE#, WE#) enable reading, writing, and erasing operations.

Detailed Application Field Plans

The AT28C64B-15PC finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers and other embedded devices. 2. Computer systems: Employed for BIOS storage and configuration data in computers. 3. Consumer electronics: Utilized for data storage in devices such as digital cameras, printers, and set-top boxes. 4. Automotive electronics: Used for storing calibration data, configuration settings, and firmware in automotive electronic control units (ECUs). 5. Industrial automation: Employed for storing program code, configuration data, and historical logs in industrial control systems.

Alternative Models

Several alternative models with similar functionality are available in the market. Some notable alternatives to the AT