AT24C64D-SSHM-T Microchip Technology | Specification, Inventory, Distributors and Datasheet

The Microchip Technology AT24C64D-SSHM-T is a 64 Kbit (8 Kbyte) Electrically Erasable Programmable Read-Only Memory (EEPROM) device designed for use in a wide variety of applications, such as data storage, configuration settings, and other non-volatile memory needs. This EEPROM is part of the AT24Cxx series from Microchip, which includes devices offering varying capacities of non-volatile memory and operates using the I²C interface, making it ideal for embedded systems where simplicity and low power consumption are key considerations.

## Key Features

* Memory Capacity: The AT24C64D-SSHM-T provides a total memory of 64 Kbits (8 Kbytes), organized into 8-bit wide memory locations. The 64 Kbit of memory is ideal for storing small amounts of data, configuration settings, calibration data, and unique identifiers in embedded systems.
* I²C Interface: The device operates using the I²C (Inter-Integrated Circuit) communication protocol, allowing for easy integration with a variety of microcontrollers and processors that support I²C. This simplifies connections and reduces the number of I/O pins needed for communication.
* Wide Voltage Range: The AT24C64D-SSHM-T operates over a wide voltage range from 1.7 V to 5.5 V, making it compatible with both low-voltage and standard 3.3 V or 5 V systems.
* Low Power Consumption: The device is designed for low power consumption, consuming typically 0.3 µA in standby mode and 1 mA during a write operation, making it ideal for battery-powered devices.
* Write Cycle Time: The AT24C64D-SSHM-T offers a typical write cycle time of 5 ms (maximum of 10 ms). This allows for quick writes of data, minimizing the time needed for updating stored values.
* Endurance: The device provides 1 million write cycles per memory location, making it suitable for applications requiring frequent updates, such as log data storage, calibration values, or configuration settings.
* Data Retention: The memory is designed for long-term data retention, with an industry-standard data retention period of 100 years, ensuring that stored information remains intact over extended periods of time without power.
* Automatic Page Write: The AT24C64D-SSHM-T supports page write operations, where data can be written in pages of 32 bytes. This reduces write time by allowing multiple bytes to be written in a single operation.
* Device Addressing: The I²C interface allows for 7-bit addressing, enabling up to 128 devices to be connected on a single bus. The device supports an address range from 0x50 to 0x57, making it easy to address and communicate with multiple memory devices in larger systems.
* Write Protection: The device includes write protection features to prevent accidental writes during critical operations. It supports both hardware and software write protection through a control register, ensuring data integrity.
* Small Package Options: The AT24C64D-SSHM-T is housed in a small 8-pin TSSOP (Thin Shrink Small Outline Package), making it suitable for space-constrained designs in embedded systems, consumer electronics, and other compact applications.

## Electrical Characteristics (at TA = 25°C, Vcc = 3.3 V, unless otherwise noted)

| Parameter | Typical Value | Maximum Value |
| ---------------------------------- | ----------------------- | ------------------- |
| Supply Voltage (Vcc) | 1.7 V to 5.5 V | — |
| Supply Current (Icc) | 0.3 µA (standby) | 2 mA (write mode) |
| Standby Current (Isb) | 0.3 µA | — |
| Write Current (Iwrite) | 1 mA | — |
| Write Cycle Time (tWR) | 5 ms (typical) | 10 ms (max) |
| Data Retention | 100 years | — |
| Endurance | 1 million cycles | — |
| I²C Clock Frequency (SCL) | 100 kHz (Standard Mode) | 400 kHz (Fast Mode) |
| Output Drive Current (SDA) | 3 mA | — |
| Write Protection Voltage (Vpp) | 1.8 V to 5.5 V | — |
| Input Voltage (Vih) | 2.0 V (min) | — |
| Input Voltage (Vil) | 0.6 V (max) | — |

## Package and Environmental Ratings

* Package: The AT24C64D-SSHM-T comes in an 8-pin TSSOP package, which provides a compact form factor for integration into space-limited designs, and is ideal for use in portable devices, consumer electronics, and industrial systems.
* Temperature Range: The device operates over an industrial temperature range of −40°C to 85°C, making it suitable for use in harsh environments, including automotive and industrial applications where reliability is critical.
* RoHS Compliance: The AT24C64D-SSHM-T is RoHS-compliant, ensuring that it meets the requirements for lead-free manufacturing processes and is environmentally friendly.
* Thermal Resistance (θJA): The thermal resistance of the TSSOP package is typically 85°C/W, providing an estimate of the heat dissipation characteristics of the device under normal operating conditions.

## Applications

* Embedded Systems: The AT24C64D-SSHM-T is ideal for use in embedded systems that require non-volatile storage of configuration settings, calibration data, or device parameters, particularly where low power consumption and compact size are important considerations.
* Consumer Electronics: The EEPROM is commonly used in consumer electronics devices such as television sets, digital cameras, home appliances, and other devices requiring user settings storage or product information.
* Automotive: In automotive applications, the AT24C64D-SSHM-T is used to store data such as vehicle identification numbers (VINs), calibration data, and configuration settings for embedded controllers in ECUs (Electronic Control Units) and other automotive systems.
* Industrial Equipment: The device can be used in industrial control systems for storing configuration settings, calibration parameters, and equipment-specific data.
* Medical Devices: The AT24C64D-SSHM-T is suitable for medical equipment where non-volatile memory is needed to store patient data, system configuration, and calibration settings.
* Smart Cards and Security Systems: The AT24C64D-SSHM-T can be used in smart cards, access control systems, and other security-related applications that require the storage of encrypted data or identification information.

## Design Considerations and Advantages

* Low Power Consumption: With low standby current (0.3 µA) and low operating current during write cycles (1 mA), the AT24C64D-SSHM-T is suitable for battery-powered applications, helping to prolong battery life in portable systems.
* Small Footprint: The small TSSOP-8 package allows for easy integration into space-limited designs, which is critical for compact embedded systems and consumer electronics.
* I²C Interface: The I²C communication interface simplifies the design of complex systems by allowing multiple devices to be connected and managed with a simple two-wire interface. This also reduces the need for a large number of I/O pins on the microcontroller or processor.
* Write Protection: The AT24C64D-SSHM-T supports hardware and software write protection, ensuring that critical data cannot be inadvertently overwritten, thereby preserving the integrity of the stored information.

## Conclusion

The AT24C64D-SSHM-T from Microchip Technology is a highly versatile, low-power, 64 Kbit EEPROM that offers excellent performance for a wide range of embedded and non-volatile memory applications. With its I²C interface, low power consumption, high endurance, and data retention capabilities, it is well-suited for consumer electronics, automotive systems, industrial equipment, medical devices, and other applications requiring non-volatile storage. The compact TSSOP-8 package and wide operating voltage range make it a flexible and reliable choice for modern embedded system designs.