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Microchip Technology 24LC64FT-E/SN

Name: 24LC64FT-E/SN
Brand: Microchip Technology
SKU: 24LC64FT-E/SN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 24LC64FT-E/SN

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: 24LC64FT-E/SN.pdf

Description:: IC EEPROM 64KBIT I2C 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:4,201

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Product details

Overview

24LC64FT-E/SN from Microchip Technology Inc. is a 64 Kbit I²C-compatible serial EEPROM organized as 8K × 8-bit memory, operating from 2.5V to 5.5V with 400 kHz max clock frequency and industrial–automotive temperature range (–40°C to +125°C). It features hardware write-protection for the upper 1/4 array (1800h–1FFFh), 32-byte page write buffer, and low-power operation (400 µA read, 1 µA standby).

For engineers reviewing the 24LC64FT-E/SN datasheet, 24LC64FT-E/SN pinout, 24LC64FT-E/SN application, or 24LC64FT-E/SN equivalent, key selection criteria include automotive-grade reliability, quarter-array hardware write-protect, I²C bus compatibility up to 400 kHz at V_CC ≥ 2.5V, and support for cascaded multi-device addressing via A0–A2 pins.

Technical Context

The 24LC64FT-E/SN implements a standard two-wire I²C interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, slope-controlled outputs to suppress ground bounce, and internal address pointer auto-increment for sequential reads. Its slave address uses fixed control code '1010' plus three programmable chip-select bits (A2–A0) enabling up to eight devices on one bus.

Write operations are self-timed with typical 5 ms byte/page cycle time; acknowledge polling is supported to detect completion. The WP pin enables hardware-level protection of addresses 1800h–1FFFh when pulled high, while read operations remain fully accessible regardless of WP state.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	64 Kbit (8K × 8-bit), directly addressable without external decoding logic
V_CC Range	2.5V to 5.5V - supports legacy 3.3V and 5V systems; not rated below 2.5V
Max Clock Frequency	400 kHz at V_CC ≥ 2.5V - compatible with standard-mode I²C timing budgets
Temperature Range	–40°C to +125°C (Automotive E-grade) - qualified for under-hood and powertrain applications
Write Protection	Hardware-enabled for upper 1/4 array (1800h–1FFFh) via WP pin - prevents accidental firmware/data corruption
Endurance & Retention	1 million erase/write cycles; >200 years data retention - suitable for long-life embedded logging
Page Write Buffer	32 bytes - reduces I²C transaction count for bulk writes, improving bus efficiency

Pinout & Package

24LC64FT-E/SN is supplied in an 8-lead SOIC package (SN suffix), with lead pitch 1.27 mm and body width 3.90 mm per Microchip packaging specification.

Pin/Terminal	Circuit Role	Design Meaning
A0	Chip Address Input	LSB of 3-bit device address; hardwired to VSS or VCC to select one of eight possible I²C slave addresses
A1	Chip Address Input	Middle bit of device address; determines unique I²C address when multiple 24LC64FT-E/SN devices share same bus
A2	Chip Address Input	MSB of device address; enables up to 512 Kbit contiguous address space across eight devices
VSS	Ground Reference	System return path for all internal circuitry; must be connected before VCC during power-up
SDA	Serial Data I/O	Open-drain bidirectional bus line requiring external pull-up; carries address, command, and data
SCL	Serial Clock Input	Master-generated clock synchronizing all I²C transfers; Schmitt-trigger input rejects noise spikes
WP	Write-Protect Control	Active-high enable for hardware lock of upper 16 Kbit; no effect on read access or lower 48 Kbit
VCC	Power Supply	2.5V–5.5V supply input; powers EEPROM core, interface logic, and internal charge pump for write operations

Key Features

Feature	Design Value
I²C Bus Compatibility	Fully compliant with standard-mode I²C protocol (100 kHz) and fast-mode (400 kHz), including Start/Stop detection and ACK/NACK handling
Automotive Temperature Grade	Qualified per AEC-Q100 for –40°C to +125°C ambient operation - validated for engine control, ADAS, and infotainment modules
Hardware Write-Protection	Physical disable of write access to 1800h–1FFFh region via WP pin - eliminates software vulnerability to overwrite during runtime
Noise Immunity	Schmitt-trigger inputs on SDA/SCL with 50 ns spike suppression and 0.05×V_CC hysteresis - ensures reliable operation in electrically noisy vehicle environments
Low-Power Operation	1 µA max standby current at +125°C - enables always-on storage in battery-backed systems without significant drain

Applications

Automotive Engine Control Unit (ECU)	Industrial Programmable Logic Controller (PLC)
Use Scenario: Storing calibration tables, fault codes, and adaptive learning parameters that must survive ignition cycling and extended thermal stress. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed data integrity over 15+ year vehicle lifetime and 1M+ write cycles. Use Value: Hardware write-protect prevents corruption of critical engine maps during transient voltage events or software faults.	Use Scenario: Retaining I/O configuration, ladder logic state, and sensor offset values across power loss in factory automation equipment. IC Role / Device Role / Timing Role: Reliable parameter backup memory interfaced directly to microcontroller I²C peripheral without glue logic. Use Value: 400 kHz I²C speed enables fast reinitialization after brownout; 125°C rating supports operation inside sealed control cabinets.
Medical Infusion Pump	Smart Energy Meter
Use Scenario: Logging dosage history, alarm events, and user settings with regulatory-compliant data persistence and tamper resistance. IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory storing audit-trail records and calibration constants. Use Value: Quarter-array write-protect isolates safety-critical calibration data from field-updatable operational logs.	Use Scenario: Recording tariff schedules, consumption profiles, and firmware update metadata in utility-grade meters deployed outdoors. IC Role / Device Role / Timing Role: Long-term data logger memory with >200-year retention and AEC-Q100 reliability assurance. Use Value: Automotive-grade qualification ensures performance stability under wide ambient temperature swings and humidity exposure.

Automotive Engine Control Unit (ECU)

Industrial Programmable Logic Controller (PLC)

Use Scenario: Storing calibration tables, fault codes, and adaptive learning parameters that must survive ignition cycling and extended thermal stress.

IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed data integrity over 15+ year vehicle lifetime and 1M+ write cycles.

Use Value: Hardware write-protect prevents corruption of critical engine maps during transient voltage events or software faults.

Use Scenario: Retaining I/O configuration, ladder logic state, and sensor offset values across power loss in factory automation equipment.

IC Role / Device Role / Timing Role: Reliable parameter backup memory interfaced directly to microcontroller I²C peripheral without glue logic.

Use Value: 400 kHz I²C speed enables fast reinitialization after brownout; 125°C rating supports operation inside sealed control cabinets.

Medical Infusion Pump

Smart Energy Meter

Use Scenario: Logging dosage history, alarm events, and user settings with regulatory-compliant data persistence and tamper resistance.

IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory storing audit-trail records and calibration constants.

Use Value: Quarter-array write-protect isolates safety-critical calibration data from field-updatable operational logs.

Use Scenario: Recording tariff schedules, consumption profiles, and firmware update metadata in utility-grade meters deployed outdoors.

IC Role / Device Role / Timing Role: Long-term data logger memory with >200-year retention and AEC-Q100 reliability assurance.

Use Value: Automotive-grade qualification ensures performance stability under wide ambient temperature swings and humidity exposure.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
24LC64F-I/SN	Same die, industrial grade only (–40°C to +85°C); identical electrical specs except temp range and endurance test conditions	Lacks automotive qualification; unsuitable for under-hood or safety-critical systems requiring AEC-Q100	Select 24LC64F-I/SN only for cost-sensitive consumer or industrial applications where extended temperature is unnecessary
AT24C64D-SSHM-T	64 Kbit I²C EEPROM from Microchip (formerly Atmel); supports 1 MHz clock at 2.5V+, wider V_CC range (1.7–5.5V), but no automotive grade option	Higher speed and lower voltage capability; lacks E-temp qualification and exact same write-protect boundary mapping	Choose AT24C64D-SSHM-T when 1 MHz operation or 1.7V minimum supply is required, and automotive qualification is not mandated

Compared with 24LC64F-I/SN, the 24LC64FT-E/SN adds AEC-Q100 automotive qualification and extended temperature support, while AT24C64D-SSHM-T offers higher speed and lower voltage operation but no E-grade variant - making 24LC64FT-E/SN the sole choice for automotive EEPROMs requiring hardware write-protect at 125°C.

Availability

24LC64FT-E/SN is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for 24LC64FT-E/SN 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 leading provider of microcontrollers, analog, FPGA, and memory solutions, serving automotive, industrial, and communications markets with vertically integrated design and manufacturing.

The 24LC64FT-E/SN belongs to Microchip's 24XX64F family of automotive-grade serial EEPROMs, designed specifically for robust, low-power nonvolatile storage in harsh environments where data integrity and long-term reliability are mission-critical.

FAQ

What is the maximum I²C clock frequency supported by the 24LC64FT-E/SN?

The 24LC64FT-E/SN supports up to 400 kHz I²C clock frequency when V_CC is 2.5V or higher. It does not support 1 MHz operation - that capability is exclusive to the 24FC64F variant. This 400 kHz limit ensures compatibility with standard-mode and fast-mode I²C controllers in automotive and industrial microcontrollers.

Does the 24LC64FT-E/SN have hardware write-protection, and how is it implemented?

Yes, the 24LC64FT-E/SN implements hardware write-protection for the upper 1/4 memory array (addresses 1800h–1FFFh) via the WP pin. When WP is tied to V_CC, writes to that region are inhibited while reads remain fully functional. This protection is active immediately upon WP assertion and requires no software configuration - a key safety feature for automotive firmware storage.

What temperature range is guaranteed for the 24LC64FT-E/SN?

The 24LC64FT-E/SN is qualified for the automotive temperature range of –40°C to +125°C (E-grade), as confirmed by its part number suffix "E" and full AEC-Q100 compliance. This rating applies to both parametric performance and reliability testing, making it suitable for under-hood, powertrain, and ADAS applications where extended thermal stability is mandatory.

Can multiple 24LC64FT-E/SN devices share the same I²C bus?

Yes, up to eight 24LC64FT-E/SN devices can operate on a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit slave addresses. Each device must have a distinct combination of A0–A2 tied to VSS or VCC; the SOT-23 variant lacks these pins, but the 24LC64FT-E/SN in SOIC (SN) package fully supports multi-device addressing.

What is the page write buffer size of the 24LC64FT-E/SN, and why does it matter?

The 24LC64FT-E/SN has a 32-byte page write buffer. This allows up to 32 bytes to be loaded into the buffer and written to memory in a single self-timed cycle (typ. 5 ms), reducing I²C transaction overhead versus individual byte writes. It improves system throughput and minimizes bus occupancy - especially valuable in real-time automotive and industrial control applications.

24LC64FT-E/SN Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

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:: 2.5V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

24LC64FT-E/SN FAQ

1.How can I place an order for 24LC64FT-E/SN through Aetrix?

Please submit a Request for Quotation (RFQ) for 24LC64FT-E/SN 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 24LC64FT-E/SN reliable?

The price and inventory of 24LC64FT-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC64FT-E/SN is usually 5 days.

3.What payment methods are accepted for 24LC64FT-E/SN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC64FT-E/SN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24LC64FT-E/SN?

24LC64FT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24LC64FT-E/SN 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 24LC64FT-E/SN?

For technical support, including 24LC64FT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC64FT-E/SN requirements.

6.How does Aetrix verify that 24LC64FT-E/SN is sourced from the original manufacturer or authorized distributors?

All 24LC64FT-E/SN 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 24LC64FT-E/SN meets industry standards.

7.What is the process for return or replacement of 24LC64FT-E/SN?

All 24LC64FT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC64FT-E/SN, 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 24LC64FT-E/SN part is unused and in its original packaging.

Return procedure for 24LC64FT-E/SN:

1.Submit a request within 90 days.

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

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