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Name: AT24C64D-SSHM-B
Brand: Microchip Technology
SKU: AT24C64D-SSHM-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Microchip Technology AT24C64D-SSHM-B

Part No.:: AT24C64D-SSHM-B

Manufacturer:: Microchip Technology

Package:: 8-SOIC (0.154, 3.90mm Width)

Datasheet:: AT24C64D-SSHM-B.pdf

Description:: IC EEPROM 64KBIT I2C 1MHZ 8SOIC

In Stock:: 2611

Quantity:: Add To Cart

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AT24C64D-SSHM-B Specifications

Package/Case:
8-SOIC (0.154, 3.90mm Width)
Packaging:
Tube
Series:
-
ProductStatus:
Active
MemoryType:
Non-Volatile
MemoryFormat:
EEPROM
Technology:
EEPROM
MemorySize:
64Kb (8K x 8)
MemoryInterface:
I²C
ClockFrequency:
1 MHz
WriteCycleTime-WordPage:
5ms
AccessTime:
550 ns
Voltage-Supply:
1.7V ~ 5.5V
OperatingTemperature:
-40°C ~ 85°C (TA)
MountingType:
Surface Mount

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AT24C64D-SSHM-B information

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AT24C64D-SSHM-B Typical application Circuitry

AT24C64D-SSHM-B

A 64-Kbit EEPROM (Electrically Erasable Programmable Read-Only Memory) from the Atmel (now a part of Microchip Technology) family, the AT24C64D-SSHM-B is intended for the storage of data that needs to be retained in the event of a power outage. This component is widely utilized across a diverse range of applications due to its ability to retain data without power, low power consumption, and I²C interface, making it perfect for device configuration, calibration data storage, and user preferences in consumer electronics, industrial equipment, medical devices, and automotive applications.

Application Scenarios and Parameter Features

The AT24C64D-SSHM-B features a 64-Kbit (8,192 x 8) memory size, I²C (Two-Wire) interface, a wide voltage range (1.7V to 5.5V), and a write cycle time of 5 ms (maximum). Its I²C interface facilitates easy integration into most microcontroller-based systems, allowing for efficient data storage and retrieval with minimal pin usage.

A specific application scenario is its use in a digital thermostat for storing calibration data and user settings, ensuring these settings are not lost when the device is powered down or reset.

Specific Circuit Connection

In this application scenario, the following provides detailed circuit connections and considerations for integrating the AT24C64D-SSHM-B:

1. Power Supply Connection: Within its functioning range, the AT24C64D-SSHM-B needs to be linked to a reliable power supply. Connect the Vcc pin of the AT24C64D-SSHM-B to a 3.3V supply, ensuring the GND pin is tied to the system ground for a common reference point.

2. I²C Interface Connection: Attach the AT24C64D-SSHM-B's SDA (Serial Data) and SCL (Serial Clock) pins to the matching SDA and SCL pins on the microcontroller in order to communicate via the I²C bus. To guarantee correct I²C bus operation, pull-up resistors (usually 4.7kΩ to 10kΩ) must be installed on both the SDA and SCL lines.

3. Write Protect (WP) Feature: To utilize the write protect feature, which prevents accidental data overwriting, the WP pin of the AT24C64D-SSHM-B can be connected to a GPIO pin on the microcontroller.You can enable or disable write protection by adjusting the state of this pin.

4. Address Pins (A0, A1, A2): The address pins determine the device's address on the I²C bus. For a single AT24C64D-SSHM-B on the bus, these can be connected to ground (GND) to set the lowest possible address. If multiple EEPROMs are used, these pins can be set differently to assign unique addresses to each device.

Design Considerations

When designing the circuit, several factors should be considered:

- Power Supply Stability: Ensure the power supply is stable and within the specified voltage range to prevent data corruption.

- I²C Bus Integrity: Implement proper I²C bus design, including the use of pull-up resistors and ensuring the bus is not overloaded with too many devices, which could degrade signal integrity.

- Data Integrity Checks: Implement software mechanisms to verify data integrity, such as checksums or CRC, especially for critical data storage.

- Device Addressing: Plan the I²C addresses carefully, especially when multiple I²C devices are present, to avoid address conflicts.

By addressing these considerations and following the detailed guidance on circuit connections, integrating the AT24C64D-SSHM-B into a digital thermostat or any similar application can be achieved effectively, ensuring reliable and persistent storage of critical data.

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6. What is the process for return or replacement of AT24C64D-SSHM-B?

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of AT24C64D-SSHM-B.

(3)The PartNo is unused and only in the original unpacked packaging.

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