AT28HC64B High-speed Parallel EEPROM: Pinout, Equivalent and Datasheet

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Published: 09 March 2022 | Last Updated: 09 March 2022

1136

AT28HC64B-90SU

AT28HC64B-90SU

Microchip Technology

5V V Surface Mount Memory IC AT28HC64 64 kb kb 17.9mm mm 40mA mA

Purchase Guide

5V V Surface Mount Memory IC AT28HC64 64 kb kb 17.9mm mm 40mA mA

The AT28HC64B is a high-performance electrically-erasable and programmable readonly memory (EEPROM). Its 64K of memory is organized as 8,192 words by 8 bits. Manufactured with advanced nonvolatile CMOS technology, the device offers access times to 55 ns with power dissipation of just 220 mW. Furthermore, Huge range of Semiconductors, Capacitors, Resistors and IcS in stock. Welcome RFQ.

This video shows a high level, industry view of EEPROM: What it is; Why it sells; when to choose it; when not to choose it.

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AT28HC64B Pinout

The following figure is the diagram of AT28HC64B pinout.

Pinout.png

Pinout


AT28HC64B CAD Model

The followings are AT28HC64B Symbol, Footprint, and 3D Model.

PCB Symbol.png

PCB Symbol


PCB Footprint.png

PCB Footprint


3D Model.png

3D Model


AT28HC64B Overview

The AT28HC64B is a high-performance electrically-erasable and programmable readonly memory (EEPROM). Its 64K of memory is organized as 8,192 words by 8 bits. Manufactured with advanced nonvolatile CMOS technology, the device offers access times to 55 ns with power dissipation of just 220 mW. When the device is deselected, the CMOS standby current is less than 100 µA.

The AT28HC64B is accessed like a Static RAM for the read or write cycle without the need for external components. The device contains a 64-byte page register to allow writing of up to 64 bytes simultaneously. During a write cycle, the addresses and 1 to 64 bytes of data are internally latched, freeing the address and data bus for other operations. Following the initiation of a write cycle, the device will automatically write the latched data using an internal control timer.

This article provides you with a basic overview of the AT28HC64B High-speed Parallel EEPROM, including its pin descriptions, features and specifications, etc., to help you quickly understand what AT28HC64B is.


AT28HC64B Features

● Fast Read Access Time – 70 ns

● Automatic Page Write Operation

   ◆ Internal Address and Data Latches for 64 Bytes

● Fast Write Cycle Times

   ◆ Page Write Cycle Time: 10 ms Maximum (Standard)

   ◆ 1 to 64-byte Page Write Operation

● Low Power Dissipation

   ◆ 40 mA Active Current

   ◆ 100 µA CMOS Standby Current

● Hardware and Software Data Protection

● DATA Polling and Toggle Bit for End of Write Detection

● High Reliability CMOS Technology

   ◆ Endurance: 100,000 Cycles

   ◆ Data Retention: 10 Years

● Single 5 V ±10% Supply

● CMOS and TTL Compatible Inputs and Outputs

● JEDEC Approved Byte-wide Pinout

● Industrial Temperature Ranges

● Green (Pb/Halide-free) Packaging Option Only


Specifications

Microchip Technology AT28HC64B-90SU technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology AT28HC64B-90SU.
  • Type
    Parameter
  • Factory Lead Time
    14 Weeks
  • Contact Plating

    Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.

    Tin
  • Mount

    In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.

    Surface Mount
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Surface Mount
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    28-SOIC (0.295, 7.50mm Width)
  • Number of Pins
    28
  • Memory Types
    Non-Volatile
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    -40°C~85°C TC
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Tube
  • Published
    1997
  • JESD-609 Code

    The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.

    e3
  • Pbfree Code

    The "Pbfree Code" parameter in electronic components refers to the code or marking used to indicate that the component is lead-free. Lead (Pb) is a toxic substance that has been widely used in electronic components for many years, but due to environmental concerns, there has been a shift towards lead-free alternatives. The Pbfree Code helps manufacturers and users easily identify components that do not contain lead, ensuring compliance with regulations and promoting environmentally friendly practices. It is important to pay attention to the Pbfree Code when selecting electronic components to ensure they meet the necessary requirements for lead-free applications.

    yes
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Active
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    3 (168 Hours)
  • Number of Terminations
    28
  • Voltage - Supply

    Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.

    4.5V~5.5V
  • Terminal Position

    In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.

    DUAL
  • Peak Reflow Temperature (Cel)

    Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.

    250
  • Number of Functions
    1
  • Supply Voltage

    Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.

    5V
  • Terminal Pitch

    The center distance from one pole to the next.

    1.27mm
  • Frequency

    In electronic components, the parameter "Frequency" refers to the rate at which a signal oscillates or cycles within a given period of time. It is typically measured in Hertz (Hz) and represents how many times a signal completes a full cycle in one second. Frequency is a crucial aspect in electronic components as it determines the behavior and performance of various devices such as oscillators, filters, and communication systems. Understanding the frequency characteristics of components is essential for designing and analyzing electronic circuits to ensure proper functionality and compatibility with other components in a system.

    90GHz
  • Time@Peak Reflow Temperature-Max (s)

    Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.

    40
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    AT28HC64
  • Qualification Status

    An indicator of formal certification of qualifications.

    Not Qualified
  • Operating Supply Voltage

    The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.

    5V
  • Power Supplies

    an electronic circuit that converts the voltage of an alternating current (AC) into a direct current (DC) voltage.?

    5V
  • Interface

    In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.

    Parallel, SPI
  • Memory Size

    The memory capacity is the amount of data a device can store at any given time in its memory.

    64Kb 8K x 8
  • Nominal Supply Current

    Nominal current is the same as the rated current. It is the current drawn by the motor while delivering rated mechanical output at its shaft.

    40mA
  • Operating Mode

    A phase of operation during the operation and maintenance stages of the life cycle of a facility.

    ASYNCHRONOUS
  • Access Time

    Access time in electronic components refers to the amount of time it takes for a system to retrieve data from memory or storage once a request has been made. It is typically measured in nanoseconds or microseconds and indicates the speed at which data can be accessed. Lower access time values signify faster performance, allowing for more efficient processing in computing systems. Access time is a critical parameter in determining the overall responsiveness of electronic devices, particularly in applications requiring quick data retrieval.

    90ns
  • Memory Format

    Memory Format in electronic components refers to the specific organization and structure of data storage within a memory device. It defines how data is stored, accessed, and managed within the memory module. Different memory formats include RAM (Random Access Memory), ROM (Read-Only Memory), and various types of flash memory. The memory format determines the speed, capacity, and functionality of the memory device, and it is crucial for compatibility with other components in a system. Understanding the memory format is essential for selecting the right memory module for a particular application or device.

    EEPROM
  • Memory Interface

    An external memory interface is a bus protocol for communication from an integrated circuit, such as a microprocessor, to an external memory device located on a circuit board.

    Parallel
  • Organization

    In the context of electronic components, the parameter "Organization" typically refers to the arrangement or structure of the internal components within a device or system. It can describe how various elements such as transistors, resistors, capacitors, and other components are physically arranged and interconnected on a circuit board or within a semiconductor chip.The organization of electronic components plays a crucial role in determining the functionality, performance, and efficiency of a device. It can impact factors such as signal propagation, power consumption, thermal management, and overall system complexity. Engineers carefully design the organization of components to optimize the operation of electronic devices and ensure reliable performance.Different types of electronic components may have specific organizational requirements based on the intended application and design considerations. For example, integrated circuits may have a highly compact and intricate organization to maximize functionality within a small footprint, while larger electronic systems may have a more modular and distributed organization to facilitate maintenance and scalability.

    8KX8
  • Memory Width

    Memory width refers to the number of bits that can be read or written to memory at one time. It is an important specification in electronic components, particularly in memory devices like RAM and cache. A wider memory width allows for greater data throughput, enabling faster performance as more data can be processed simultaneously. Memory width can vary among different types of memory and can impact both the complexity and efficiency of data handling within electronic systems.

    8
  • Write Cycle Time - Word, Page

    Write Cycle Time - Word, Page refers to the duration required to write data to a specific memory cell or a page of memory in electronic components, particularly in non-volatile memories like Flash or EEPROM. It indicates the time taken to complete a writing operation for a single word or an entire page of data. This parameter is crucial for determining the performance and speed of memory devices in applications where quick data storage is essential. It impacts the overall efficiency in data handling, affecting both read and write speeds in memory-related operations.

    10ms
  • Density

    In electronic components, "Density" refers to the mass or weight of a material per unit volume. It is a physical property that indicates how tightly packed the atoms or molecules are within the material. The density of a component can affect its performance and characteristics, such as its strength, thermal conductivity, and electrical properties. Understanding the density of electronic components is important for designing and manufacturing processes to ensure optimal performance and reliability.

    64 kb
  • Standby Current-Max

    Standby Current-Max refers to the maximum amount of current that an electronic component or device consumes while in a low-power standby mode. This parameter is critical for power management, especially in battery-operated devices, as it indicates how efficiently the device can conserve energy when not actively in use. A lower Standby Current-Max value is typically desirable, as it contributes to longer battery life and reduced energy consumption. Manufacturers specify this value to help engineers select components that meet specific power efficiency requirements in their designs.

    0.0001A
  • Programming Voltage

    A special high-voltage supply that supplies the potential and energy for altering the state of certain nonvolatile memory arrays. On some devices, the presence of VPP also acts as a program enable signal (P).

    5V
  • Endurance

    In electronic components, "Endurance" refers to the ability of a component to withstand repeated cycles of operation without degradation in performance or failure. It is a crucial parameter, especially in components that are subjected to frequent switching or high levels of stress during operation. Endurance testing is often conducted to evaluate the reliability and durability of electronic components under real-world conditions. Components with high endurance ratings are more likely to have a longer lifespan and provide consistent performance over time. Manufacturers typically provide endurance specifications in datasheets to help engineers and designers select components that meet the required durability for their applications.

    100000 Write/Erase Cycles
  • Write Cycle Time-Max (tWC)

    The parameter "Write Cycle Time-Max (tWC)" in electronic components refers to the maximum amount of time it takes for data to be written to a memory cell or storage device. It is a crucial specification in devices such as EEPROMs, flash memory, and other non-volatile memory technologies. The tWC value indicates the longest duration required for a write operation to be completed successfully, ensuring that the data is stored accurately and reliably. Designers and engineers use this parameter to optimize performance and ensure proper functioning of the electronic component within the specified time constraints.

    10ms
  • Data Retention Time-Min

    The parameter "Data Retention Time-Min" in electronic components refers to the minimum amount of time that data can be stored in a non-volatile memory device without requiring a refresh or rewrite operation to maintain its integrity. This parameter is crucial for applications where data integrity and reliability are essential, such as in embedded systems, IoT devices, and critical infrastructure. A longer data retention time indicates a more stable memory device that can retain data for extended periods without degradation or loss. It is important to consider the data retention time when selecting memory components for specific applications to ensure data reliability and longevity.

    10
  • Data Polling

    Data Polling is a process used in electronic components to retrieve data at regular intervals from a sensor or device. It involves checking or querying the device for updated information, ensuring that the most current data is accessible for processing or analysis. This technique is commonly used in systems where continuous monitoring is necessary, allowing for timely responses based on the latest data collected. Data Polling can impact system performance, as it may introduce delays or consume resources depending on the polling frequency and the efficiency of the implemented protocol.

    YES
  • Toggle Bit

    The toggle bit is a control mechanism in electronic components that allows a circuit to switch between two states, typically representing binary values of 0 and 1. It is commonly used in digital systems to change the status of a device or memory cell each time it is activated. The toggle bit maintains its state until it receives a new signal that alters its value, making it essential for operations such as counters and flip-flops. This functionality enables efficient data storage, retrieval, and manipulation in various electronic applications.

    YES
  • Page Size

    In electronic components, "Page Size" refers to the amount of data that can be stored or accessed in a single page of memory. It is a crucial parameter in memory devices such as flash memory, where data is organized into pages for efficient reading and writing operations. The page size determines the granularity at which data can be written or read from the memory, impacting the speed and efficiency of data transfers. Choosing the appropriate page size is important for optimizing performance and storage capacity in electronic devices.

    64words
  • Length
    17.9mm
  • Height Seated (Max)

    Height Seated (Max) is a parameter in electronic components that refers to the maximum allowable height of the component when it is properly seated or installed on a circuit board or within an enclosure. This specification is crucial for ensuring proper fit and alignment within the overall system design. Exceeding the maximum seated height can lead to mechanical interference, electrical shorts, or other issues that may impact the performance and reliability of the electronic device. Manufacturers provide this information to help designers and engineers select components that will fit within the designated space and function correctly in the intended application.

    2.65mm
  • Width
    7.5mm
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    ROHS3 Compliant
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Lead Free
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AT28HC64B Functional Block Diagram

The following is the Block Diagram of AT28HC64B.

Block Diagram.png

Block Diagram


AT28HC64B Equivalent

           Model number                   Manufacturer                                          Description
AT28HC64B-90JIAtmel CorporationEEPROM, 8KX8, 90ns, Parallel, CMOS, PQCC32, PLASTIC, MS-016AE, LCC-32
AT28HC64B-90SIAtmel CorporationEEPROM, 8KX8, 90ns, Parallel, CMOS, PDSO28, 0.300 INCH, PLASTIC, MS-013, SOIC-28
X28HC64JM-90Xicor IncEEPROM, 8KX8, 90ns, Parallel, CMOS, PQCC32, PLASTIC, LCC-32
AT28HC64-90JIT/RAtmel CorporationEEPROM, 8KX8, 90ns, Parallel, CMOS, PQCC32, PLASTIC, LCC-32
AT28HC64B-90SIT/RAtmel CorporationEEPROM, 8KX8, 90ns, Parallel, CMOS, PDSO28, 0.300 INCH, PLASTIC, SOIC-28
AT28HC64B-90SLAtmel CorporationEEPROM, 8KX8, 90ns, Parallel, CMOS, PDSO28, 0.300 INCH, PLASTIC, MS-013, SOIC-28
X28HC64J-90C7871Intersil Corporation8KX8 EEPROM 5V, 90ns, PQCC32, PLASTIC, LCC-32
X28HC64J-90Xicor IncEEPROM, 8KX8, 90ns, Parallel, CMOS, PQCC32, PLASTIC, LCC-32
AT28HC64B-90DCAtmel CorporationEEPROM, 8KX8, 90ns, Parallel, CMOS, CDIP28, 0.600 INCH, CERDIP-28
X28HC64JI-90T3Xicor IncEEPROM, 8KX8, 90ns, Parallel, CMOS, PQCC32, PLASTIC, LCC-32


Parts with Similar Specs

The three parts on the right have similar specifications to Microchip Technology & AT28HC64B-90SU.

AT28HC64B Package

The following diagrams show the AT28HC64B package.

Top View.png

Top View


Side View.png

Side View


End View.png

End View


AT28HC64B Manufacturer

Microchip Technology Inc. is a leading provider of microcontroller and analog semiconductors, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide. Headquartered in Chandler, Arizona, Microchip offers outstanding technical support along with dependable delivery and quality.


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Datasheet PDF

Download datasheets and manufacturer documentation for Microchip Technology AT28HC64B-90SU.
Frequently Asked Questions

How many pins of AT28HC64B?

28 Pins.

What’s the operating temperature of AT28HC64B?

-40°C~85°C TC.

What is the essential property of the AT28HC64B?

The AT28HC64B is a high-performance electrically-erasable and programmable readonly memory (EEPROM). Its 64K of memory is organized as 8,192 words by 8 bits.
AT28HC64B-90SU

Microchip Technology

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