AT28C256-15PU

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This IC is an EEPROM memory chip with a storage capacity of 256 kilobits

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AT28C256-15PU DataSheet

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AT28C256-15PU Details

The AT28C256-15PU is a high-performance parallel EEPROM memory from Microchip Technology, designed for reliable data storage in various applications. This device features 256K (32K x 8) of EEPROM memory, fast access time of 150ns, and low power consumption, making it suitable for industrial control systems, communication equipment, and automotive electronics.

Key Features

  • 256K (32K x 8) EEPROM Memory: Provides a large amount of nonvolatile memory for storing data.
  • Fast Access Time - 150ns: Enables fast data access and retrieval.
  • Low Power Consumption: Designed to consume low power, making it suitable for battery-powered applications.
  • Single Power Supply Operation: Operates from a single power supply voltage.

Applications

The AT28C256-15PU is suitable for various applications that require reliable data storage, including:

  • Industrial Control Systems: Provides a reliable means of storing and retrieving control system data.
  • Communication Equipment: Enables efficient data storage and retrieval in communication equipment such as routers and switches.
  • Automotive Electronics: Suitable for automotive applications that require reliable data storage, such as engine control units and infotainment systems.

Where to Use

The AT28C256-15PU is suitable for use in a wide range of applications where reliable data storage is required. It can be used in industrial control systems, communication equipment, and automotive electronics.

How to Use

To use the AT28C256-15PU, simply connect it to your system's parallel bus and apply power. The device can be programmed using a variety of programming methods, including parallel loading and serial interfaces.

Application Circuit

The application circuit diagram for the AT28C256-15PU illustrates how to connect the device to your system's parallel bus. It includes connections for power supply, ground, and data lines, ensuring proper operation and reliable data storage.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Complementary

The AT28C256-15PU can be complemented by other Microchip Technology products that provide additional features and functionality, such as serial interfaces and encryption capabilities.

When selecting complementary devices, ensure that their features and specifications align with your specific application requirements for optimal performance and compatibility.

Frequently Asked Questions

Q: What is the access time of the AT28C256-15PU?

A: The AT28C256-15PU has an access time of 150ns.

Q: Can the AT28C256-15PU be used in automotive applications?

A: Yes, the AT28C256-15PU is suitable for use in automotive applications that require reliable data storage and retrieval.

AT28C256-15PU

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category ! EEPROM RoHS Details
Mounting Style Through Hole Package / Case PDIP-28
Interface Type Parallel Memory Size ! 256 kbit
Organization 32 k x 8 Supply Voltage - Min 4.5 V
Supply Voltage - Max 5.5 V Minimum Operating Temperature - 40 C
Maximum Operating Temperature ! + 85 C Maximum Clock Frequency 5 MHz
Access Time 150 ns Data Retention 10 Year
Supply Current - Max 50 mA Series AT28C256
Active Read Current - Max 50 mA Brand Microchip Technology
Height 4.83 mm/0.38 mm (Max)/(Min) Length 37.34 mm (Max)
Moisture Sensitive Yes Operating Supply Current 50 mA
Operating Supply Voltage ! 5 V Output Enable Access Time 70 ns
Product Type ! EEPROM Programming Voltage ! 4.5 V to 5.5 V
Factory Pack Quantity 14 Subcategory Memory & Data Storage
Width 13.97 mm (Max) Unit Weight 0.147798 oz

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification AT28C256-15PU PDF Download

FAQs

What is AT28C256-15PU?

The AT28C256-15PU is a 256-kilobit (32K x 8) electrically erasable programmable read-only memory (EEPROM) chip manufactured by Atmel Corporation. It offers non-volatile storage capability for data that needs to be retained even when power is removed. The '15PU' in the part number signifies a speed rating of 150ns access time.

How Does AT28C256-15PU Work?

The AT28C256-15PU operates by storing and retrieving data electronically within its memory cells. Data can be both written to and read from the chip. The EEPROM technology allows for data to be erased and reprogrammed multiple times, providing flexibility in data storage applications.

How Many Pins does AT28C256-15PU have and What are the Functions of the Pinout Configuration?

The AT28C256-15PU is housed in a 28-pin DIP (Dual Inline Package) package. The pinout configuration includes:

  • A0-A14: Address input pins for memory addressing.
  • DQ0-DQ7: Data input/output pins for 8-bit data transfer.
  • CE: Chip Enable pin for activating the chip.
  • OE: Output Enable pin for controlling data output.
  • WE: Write Enable pin for initiating write operations.
  • VCC: Power supply pin.
  • GND: Ground pin.

What are the Pros and Cons of AT28C256-15PU?

Pros:

  • Non-Volatile Storage: Retains data even without power, ideal for applications requiring persistent memory.
  • Electrically Erasable: Allows for easy reprogramming of data without the need for UV light exposure.
  • High Capacity: Offers 256-kilobit storage capacity for various data storage needs.
  • Reliable: Provides stable and reliable data retention over multiple read and write cycles.
  • Wide Voltage Range: Supports operation with a range of supply voltages for flexibility in system design.

Cons:

  • Speed: The 150ns access time may be slower compared to newer EEPROM technologies.
  • Complex Interface: Requires careful handling of address and control signals for proper operation.
  • Limited Endurance: EEPROM technology may have a limited number of erase/write cycles compared to other memory types.

Are There Any Equivalents/Alternatives to AT28C256-15PU for Recommendation?

  • The SST28SF040A from Microchip Technology is a similar EEPROM with a different capacity and features.
  • Alternatives to the AT28C256-15PU include the M27C256B from STMicroelectronics and the 28C256 from Microchip Technology.

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