AT28C64B-15PU

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Ultra-reliable data retention and erasure capabilities for harsh environmental condition

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AT28C64B-15PU DataSheet

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AT28C64B-15PU Details

The AT28C64B-15PU is an advanced parallel EEPROM memory device from Microchip, designed for reliable data storage in various applications. This 64-kilobit memory chip features a parallel interface, self-timed erase and write cycles, and low power consumption making it suitable for a wide range of industrial and consumer electronics.

Pinout

  • A17-A0: Address Input (1-64)
  • DQ7-DQ0: Data Output (8-bit bus)
  • /CE: Chip Enable
  • /WE: Write Enable
  • /RE: Read Enable
  • SCL and SDA: Serial Clock and Data (I2C interface)

Key Features

  • 64 kilobit parallel EEPROM memory
  • Parallel interface supports 8-bit data transfer
  • Self-timed erase and write cycles
  • Low power consumption: 10mA active current, 1μA standby current

Applications

  • Industrial control systems
  • Automotive electronics
  • Medical devices and equipment

Where to Use

The AT28C64B-15PU is suitable for applications where reliable data storage is critical, such as industrial control systems, automotive electronics, and medical devices. The device's low power consumption and high reliability make it an excellent choice for battery-powered or system-level applications.

How to Use

To use the AT28C64B-15PU, connect the address inputs (A17-A0) to your application's control logic, and the data output (DQ7-DQ0) to your system's processing unit. The chip enable (/CE), write enable (/WE), and read enable (/RE) pins must be properly controlled to ensure correct data transfer.

(Tip: Refer to the datasheet for detailed usage instructions, including timing diagrams and signal waveforms.)

Application Circuit

The application circuit diagram for the AT28C64B-15PU illustrates how to connect the memory chip to your system's control logic. It includes connections for power supply, ground, address inputs, data output, and chip enable, write enable, and read enable pins.

(Tip: Refer to the datasheet for detailed circuit diagram connections and usage guide.)

Equivalents

  • M24C64-R: A similar 64-kilobit parallel EEPROM memory device from Micron with comparable features and performance.

Complementary

The AT28C64B-15PU can be complemented by other Microchip parallel EEPROM devices, such as the AT28C32B or AT28C256B, to support larger data storage requirements.

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 maximum operating temperature range for the AT28C64B-15PU?

A: The AT28C64B-15PU operates within a temperature range of -40°C to +85°C. For more information, refer to the datasheet.

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 ! 64 kbit
Organization 8 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 40 mA Series AT28C64B
Active Read Current - Max 40 mA Brand Microchip Technology
Height 3.94 mm Length 37.3 mm
Operating Supply Current 40 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 14.4 mm
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 AT28C64B-15PU PDF Download

FAQs

What is AT28C64B-15PU?

The AT28C64B-15PU is a high-performance 64K (8K x 8) parallel EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Microchip Technology. It is designed for applications that require non-volatile storage of data and configuration parameters, such as embedded systems, microcontroller-based designs, and legacy industrial equipment.

How Does AT28C64B-15PU Work?

The AT28C64B-15PU works by storing binary data in non-volatile memory cells, which can be electrically programmed and erased. It features a parallel interface for easy integration with microcontrollers and other digital systems. Data can be read from and written to the memory using appropriate control signals and timings.

How Many Pins does AT28C64B-15PU have and What are the Functions of the Pinout Configuration?

The AT28C64B-15PU is housed in a 28-pin DIP (Dual In-line Package) package. The pinout configuration includes:

  • A0 to A13: Address input pins for selecting memory locations.
  • Q0 to Q7: Data output pins for reading memory contents.
  • CE: Chip enable input for activating the device.
  • OE: Output enable input for enabling data output.
  • WE: Write enable input for initiating write operations.
  • VCC, GND: Power supply and ground pins, respectively.
  • NC: No connection pin.

What are the Pros and Cons of AT28C64B-15PU?

Pros:

  • Non-Volatile Storage: Retains data without power, suitable for storing critical information.
  • Parallel Interface: Allows for high-speed data transfer with compatible microcontrollers.
  • High Reliability: EEPROM technology offers high endurance and data retention characteristics.
  • Wide Temperature Range: Can operate over a wide temperature range, suitable for industrial applications.

Cons:

  • Limited Rewrite Cycles: EEPROM technology has a limited number of erase/write cycles compared to other memory types.
  • Higher Cost: EEPROMs may have a higher cost per bit compared to other non-volatile memory technologies.
  • Large Package Size: The 28-pin DIP package may occupy more board space compared to surface-mount alternatives.

Are There Any Equivalents/Alternatives to AT28C64B-15PU for Recommendation?

  • The 28C64 from STMicroelectronics is a direct equivalent to the AT28C64B-15PU.
  • Alternative EEPROMs include the 24LC64 from Microchip Technology and the M24C64 from STMicroelectronics.

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