AT28C256E-15UM/883

Product Overview

Category

AT28C256E-15UM/883 belongs to the category of electrically erasable programmable read-only memory (EEPROM) chips.

Use

This product is commonly used in electronic devices for storing and retrieving data. It provides non-volatile storage, meaning that the data remains even when power is removed.

Characteristics

• Electrically erasable: The AT28C256E-15UM/883 can be erased and reprogrammed electrically, without the need for UV light exposure.
• High capacity: With a capacity of 256 kilobits (32 kilobytes), it offers ample storage space for various applications.
• Low power consumption: This chip operates at low power levels, making it suitable for battery-powered devices.
• Fast access time: The AT28C256E-15UM/883 has a fast access time of 150 nanoseconds, allowing for quick data retrieval.

Package

The AT28C256E-15UM/883 comes in a 28-pin ceramic dual in-line package (DIP). This package provides physical protection and facilitates easy integration into circuit boards.

Essence

The essence of the AT28C256E-15UM/883 lies in its ability to store and retrieve data reliably, while offering flexibility through electrical erasure and reprogramming.

Packaging/Quantity

This product is typically packaged in tubes or trays, with each containing a specific quantity of chips. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Capacity: 256 kilobits (32 kilobytes)
• Access Time: 150 nanoseconds
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Endurance: 100,000 erase/write cycles
• Data Retention: 10 years

Detailed Pin Configuration

The AT28C256E-15UM/883 has a total of 28 pins. The pin configuration is as follows:

1. A0 - Address Input
2. A1 - Address Input
3. A2 - Address Input
4. A3 - Address Input
5. A4 - Address Input
6. A5 - Address Input
7. A6 - Address Input
8. A7 - Address Input
9. A8 - Address Input
10. A9 - Address Input
11. A10 - Address Input
12. A11 - Address Input
13. A12 - Address Input
14. A13 - Address Input
15. A14 - Address Input
16. A15 - Address Input
17. /OE - Output Enable
18. /WE - Write Enable
19. VCC - Power Supply
20. GND - Ground
21. DQ0 - Data Input/Output
22. DQ1 - Data Input/Output
23. DQ2 - Data Input/Output
24. DQ3 - Data Input/Output
25. DQ4 - Data Input/Output
26. DQ5 - Data Input/Output
27. DQ6 - Data Input/Output
28. DQ7 - Data Input/Output

Functional Features

• Electrical Erasure and Reprogramming: The AT28C256E-15UM/883 allows for easy erasure and reprogramming of data through electrical signals.
• High-Speed Access: With a fast access time of 150 nanoseconds, this chip enables quick retrieval of stored data.
• Low Power Consumption: The AT28C256E-15UM/883 operates at low power levels, making it suitable for energy-efficient applications.
• Reliable Data Retention: This EEPROM chip can retain data for up to 10 years, ensuring long-term reliability.

Advantages and Disadvantages

Advantages

• Electrically erasable and reprogrammable
• High storage capacity
• Fast access time
• Low power consumption
• Reliable data retention

Disadvantages

• Limited endurance (100,000 erase/write cycles)
• Relatively higher cost compared to other non-volatile memory options

Working Principles

The AT28C256E-15UM/883 utilizes a floating-gate transistor structure to store data. When programming or erasing, electrical charges are applied to the floating gate, altering its threshold voltage. This change in threshold voltage determines whether the transistor is considered "on" or "off," representing the stored data.

During read operations, the addressed memory location is accessed by applying appropriate voltages to the address inputs. The stored data is then available at the corresponding data output pins.

Detailed Application Field Plans

The AT28C256E-15UM/883 finds application in various electronic devices that require non-volatile storage.