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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology 24AA64FT-I/OT

Name: 24AA64FT-I/OT
Brand: Microchip Technology
SKU: 24AA64FT-I/OT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 24AA64FT-I/OT

Manufacturer:: Microchip Technology

Category:: Memory

Package:: SC-74A, SOT-753

Datasheet:: 24AA64FT-I/OT.pdf

Description:: IC EEPROM 64KBIT I2C SOT23-5

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Product details

Overview

24AA64FT-I/OT from Microchip Technology Inc. is a 64 Kbit I²C-compatible serial EEPROM organized as 8K × 8-bit memory, operating from 1.7V to 5.5V with industrial temperature range (–40°C to +85°C). It features 32-byte page write buffer, hardware write-protect for upper 1/4 array (1800h–1FFFh), and Schmitt-trigger inputs for noise immunity. Used in low-power embedded systems for parameter storage, calibration data retention, and firmware configuration.

For engineers reviewing the 24AA64FT-I/OT datasheet, 24AA64FT-I/OT pinout, 24AA64FT-I/OT application, or 24AA64FT-I/OT equivalent, key selection criteria include V_CC min (1.7 V), I²C clock compatibility (100/400 kHz), standby current (1 µA max), and TSSOP-5 package footprint with SOT-23 pinout compatibility.

Technical Context

The 24AA64FT-I/OT implements a two-wire I²C interface with slave address decoding via A0–A2 pins (not present in SOT-23 variant), supporting up to eight devices on one bus. Its internal address counter enables sequential, random, and current-address read modes, while self-timed erase/write cycles eliminate external timing control.

Write protection is implemented via dedicated WP pin sampled at Stop bit, enabling hardware-level lock of 16 Kbits (1800h–1FFFh). The device uses CMOS process with Schmitt-trigger inputs (V_HYS = 0.05 V_CC) and slope-controlled outputs to suppress ground bounce and EMI.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	64 Kbit (8K × 8-bit) - supports firmware parameter tables and persistent configuration storage without external addressing logic.
V_CC Range	1.7 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifters.
I²C Clock Frequency	100 kHz (V_CC < 2.5 V) / 400 kHz (V_CC ≥ 2.5 V) - ensures interoperability with legacy and high-speed I²C masters across voltage domains.
Standby Current	1 µA max (I-temp) - extends battery life in portable medical sensors and IoT edge nodes during sleep mode.
Page Write Buffer	32 bytes - reduces I²C transaction count by 32× versus byte-write, improving bus efficiency in burst data logging.
Data Retention	> 200 years - guarantees long-term integrity of calibration coefficients and security keys in unattended infrastructure equipment.
Endurance	1 million erase/write cycles - supports frequent field-updatable parameters in industrial HMI and programmable logic controllers.

Pinout & Package

24AA64FT-I/OT is supplied in Pb-free, RoHS-compliant 5-lead SOT-23 package (3.0 mm × 1.7 mm × 1.3 mm), optimized for space-constrained PCB layouts in wearables and sensor modules.

Pin/Terminal	Circuit Role	Design Meaning
1: WP	Write-Protect Input	Hardware-enforced lock of upper 16 Kbits (1800h–1FFFh); tied to V_SS for full write access, V_CC for partial protection.
2: V_CC	Power Supply	1.7–5.5 V supply input; decoupling capacitor (0.1 µF) required within 5 mm for stable I²C timing.
3: SCL	Serial Clock Input	Open-drain I²C clock line; requires external pull-up (2 kΩ typical for 400 kHz operation).
4: V_SS	Ground Reference	Return path for all internal circuitry; must be connected to system ground plane with low-inductance trace.
5: SDA	Serial Data I/O	Bidirectional open-drain data line; shares pull-up with SCL; supports ACK polling during write cycles.

Key Features

Feature	Design Value
Low-Voltage Operation	Functional down to 1.7 V enables direct integration with ultra-low-power MCUs (e.g., PIC16LF1xxx) without voltage regulators.
Schmitt Trigger Inputs	Input hysteresis (0.05 V_CC) rejects noise spikes up to 50 ns, eliminating need for external RC filtering on SCL/SDA lines.
Page Write Capability	32-byte buffer allows single I²C transaction to store sensor calibration matrices, reducing firmware overhead and bus contention.
Hardware Write Protection	Dedicated WP pin provides tamper-resistant storage of critical boot parameters without software intervention or EEPROM lock bits.
ESD Robustness	> 4 kV HBM rating protects against handling damage during automated assembly and field maintenance.

Applications

Smart Metering	Industrial PLC
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in electricity/water meters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with hardware write-protect to prevent unauthorized firmware or billing parameter modification. Use Value: Ensures regulatory compliance by guaranteeing integrity of metrology-critical data across 200+ year retention period.	Use Scenario: Retaining I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Persistent parameter storage accessible via I²C during runtime, surviving power loss and firmware updates. Use Value: Eliminates manual reconfiguration after power cycle, reducing commissioning time and operational downtime.
Medical Sensor Hub	Automotive Body Control
Use Scenario: Saving patient-specific calibration offsets and sensor linearization coefficients in portable ECG or SpO₂ monitors. IC Role / Device Role / Timing Role: Low-power (1 µA standby) nonvolatile memory for biometric data persistence between battery charges. Use Value: Extends battery life beyond 12 months in Class II medical devices while maintaining FDA-grade data integrity.	Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive body control modules. IC Role / Device Role / Timing Role: I²C-accessible EEPROM interfaced directly with 3.3 V automotive microcontrollers (e.g., S32K144). Use Value: Enables user-customizable vehicle settings without requiring CAN bus communication or additional MCU resources.

Smart Metering

Industrial PLC

Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in electricity/water meters.

IC Role / Device Role / Timing Role: Nonvolatile configuration storage with hardware write-protect to prevent unauthorized firmware or billing parameter modification.

Use Value: Ensures regulatory compliance by guaranteeing integrity of metrology-critical data across 200+ year retention period.

Use Scenario: Retaining I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers.

IC Role / Device Role / Timing Role: Persistent parameter storage accessible via I²C during runtime, surviving power loss and firmware updates.

Use Value: Eliminates manual reconfiguration after power cycle, reducing commissioning time and operational downtime.

Medical Sensor Hub

Automotive Body Control

Use Scenario: Saving patient-specific calibration offsets and sensor linearization coefficients in portable ECG or SpO₂ monitors.

IC Role / Device Role / Timing Role: Low-power (1 µA standby) nonvolatile memory for biometric data persistence between battery charges.

Use Value: Extends battery life beyond 12 months in Class II medical devices while maintaining FDA-grade data integrity.

Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive body control modules.

IC Role / Device Role / Timing Role: I²C-accessible EEPROM interfaced directly with 3.3 V automotive microcontrollers (e.g., S32K144).

Use Value: Enables user-customizable vehicle settings without requiring CAN bus communication or additional MCU resources.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
24LC64FT-I/OT	Requires minimum 2.5 V V_CC; same 400 kHz I²C speed and 32-byte page buffer.	Not suitable for 1.8 V systems; otherwise identical functionality and pinout.	Select when system V_CC is fixed ≥2.5 V and cost sensitivity outweighs low-voltage flexibility.
AT24C64D-SSHM-T	Microchip-licensed clone with identical 1.7–5.5 V range, but rated for 100 kHz only at 1.7 V and lacks factory programming option.	Valid for cost-sensitive consumer electronics where extended endurance (>1M cycles) is not required.	Choose for high-volume production where second-source availability and lower unit cost justify minor timing margin reduction.

Compared with 24LC64FT-I/OT, the 24AA64FT-I/OT enables 1.7 V operation critical for energy-harvesting designs, while AT24C64D-SSHM-T offers supply-chain redundancy at the expense of guaranteed 400 kHz performance below 2.5 V.

Availability

24AA64FT-I/OT is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical sensor hubs, and automotive body control modules requiring stable component supply across extended product lifecycles.

Supply support for 24AA64FT-I/OT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions for embedded systems.

The 24AA64F series was designed for ultra-low-power, I²C-based nonvolatile data storage in space- and energy-constrained applications including portable instrumentation and battery-powered IoT endpoints.

FAQ

What is the minimum operating voltage for the 24AA64FT-I/OT?

The 24AA64FT-I/OT operates down to 1.7 V, enabling direct connection to 1.8 V logic families and ultra-low-power microcontrollers without level-shifting circuitry. This specification is validated across the full industrial temperature range (–40°C to +85°C) and applies to both read and write operations, making the 24AA64FT-I/OT suitable for energy-harvesting and battery-operated systems where supply voltage may dip below 2.5 V.

Does the 24AA64FT-I/OT support 1 MHz I²C clock frequency?

No, the 24AA64FT-I/OT does not support 1 MHz I²C operation. It is rated for 100 kHz when V_CC < 2.5 V and 400 kHz when V_CC ≥ 2.5 V. The 1 MHz capability is exclusive to the 24FC64F variant. Using the 24AA64FT-I/OT at 1 MHz will result in unreliable communication and potential data corruption due to violated setup/hold timing margins specified in DS22154B.

How is write protection implemented on the 24AA64FT-I/OT?

Write protection on the 24AA64FT-I/OT is controlled by the WP pin: when tied to V_CC, writes to memory addresses 1800h–1FFFh (upper 16 Kbits) are inhibited while reads remain functional; when tied to V_SS, full array write access is enabled. The WP state is sampled at the Stop bit of each write command, and toggling WP mid-cycle has no effect-ensuring deterministic behavior during firmware updates.

What package type is used for the 24AA64FT-I/OT?

The 24AA64FT-I/OT is packaged in a 5-lead SOT-23 case (3.0 mm × 1.7 mm × 1.3 mm), with pin 1 = WP, pin 2 = V_CC, pin 3 = SCL, pin 4 = V_SS, and pin 5 = SDA. This compact footprint supports high-density PCB layouts in wearables and sensor nodes, and its lead-free, RoHS-compliant construction meets global environmental compliance requirements.

Can multiple 24AA64FT-I/OT devices share the same I²C bus?

No, the 24AA64FT-I/OT in SOT-23 package lacks A0, A1, and A2 address pins, so only one device can reside on a given I²C bus. Unlike the 8-lead variants (e.g., 24AA64F-I/P), the SOT-23 version uses a fixed slave address (1010000b), preventing multi-device cascading. For systems requiring >64 Kbit density, parallel buses or larger-package variants must be used.

24AA64FT-I/OT Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: SC-74A, SOT-753

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 64Kbit

Memory Organization:: 8K x 8

Memory Interface:: I2C

Clock Frequency:: 400 kHz

Write Cycle Time - Word, Page:: 5ms

Access Time:: 900 ns

Voltage - Supply:: 1.7V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

24AA64FT-I/OT FAQ

1.How can I place an order for 24AA64FT-I/OT through Aetrix?

Please submit a Request for Quotation (RFQ) for 24AA64FT-I/OT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 24AA64FT-I/OT reliable?

The price and inventory of 24AA64FT-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA64FT-I/OT is usually 5 days.

3.What payment methods are accepted for 24AA64FT-I/OT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA64FT-I/OT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24AA64FT-I/OT?

24AA64FT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24AA64FT-I/OT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 24AA64FT-I/OT?

For technical support, including 24AA64FT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA64FT-I/OT requirements.

6.How does Aetrix verify that 24AA64FT-I/OT is sourced from the original manufacturer or authorized distributors?

All 24AA64FT-I/OT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 24AA64FT-I/OT meets industry standards.

7.What is the process for return or replacement of 24AA64FT-I/OT?

All 24AA64FT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24AA64FT-I/OT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 24AA64FT-I/OT part is unused and in its original packaging.

Return procedure for 24AA64FT-I/OT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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