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

Microchip Technology 24LC01BT-E/OT

Name: 24LC01BT-E/OT
Brand: Microchip Technology
SKU: 24LC01BT-E/OT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 24LC01BT-E/OT

Manufacturer:: Microchip Technology

Category:: Memory

Package:: SC-74A, SOT-753

Datasheet:: 24LC01BT-E/OT.pdf

Description:: IC EEPROM 1KBIT I2C SOT23-5

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Product details

Overview

24LC01BT-E/OT from Microchip Technology Inc. is a 1 Kbit I²C-compatible serial EEPROM organized as 128 × 8-bit memory with hardware write-protection, 8-byte page write buffer, and operation down to 2.5V. It features Schmitt-trigger inputs, slope-controlled outputs, and supports 400 kHz clock frequency across industrial and extended temperature ranges. It is commonly used for parameter storage in embedded controllers and sensor calibration data retention.

For engineers reviewing the 24LC01BT-E/OT datasheet, 24LC01BT-E/OT pinout, 24LC01BT-E/OT application, or 24LC01BT-E/OT equivalent, key selection criteria include V_CC range (2.5–5.5V), I²C timing compliance at 400 kHz, WP pin functionality, endurance (1M cycles), and extended-temperature qualification (-40°C to +125°C).

Technical Context

The 24LC01BT-E/OT implements a two-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control. Its internal architecture includes an 8-byte page latch, HV generator for EEPROM programming, and address pointer auto-increment logic supporting current-address, random, and sequential read modes.

Write protection is implemented via dedicated WP pin tied to V_CC to inhibit all write operations; A0–A2 pins are unconnected and may be left floating. The device uses self-timed erase/write cycles with maximum 5 ms duration and supports acknowledge polling to detect write completion without fixed delays.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Kbit (128 × 8-bit), sufficient for small configuration tables or calibration coefficients in space-constrained designs.
V_CC Range	2.5V to 5.5V - requires stable supply above 2.5V; not compatible with 1.7–2.49V systems unlike 24AA01.
Max Clock Frequency	400 kHz - defines maximum I²C bus throughput; timing parameters (T_HIGH, T_LOW) validated for this rate at 2.5–5.5V.
Write Endurance	1,000,000 cycles - supports frequent reconfiguration in field-upgradable devices or logging applications.
Data Retention	200 years - ensures long-term reliability of stored settings without refresh in battery-backed or maintenance-free systems.
Temperature Range	-40°C to +125°C (Extended grade) - qualified for under-hood automotive, industrial motor controls, and high-ambient environments.
Standby Current	5 µA max at E-temp - enables ultra-low-power sleep mode in energy-sensitive IoT endpoints.

Pinout & Package

24LC01BT-E/OT is packaged in 5-lead SC-70 (Microchip package code LT), measuring 2.00 mm × 1.25 mm × 0.95 mm (L × W × H), with exposed pad optional for thermal relief.

Pin/Terminal	Circuit Role	Design Meaning
SCL	Serial Clock Input	Asynchronous edge-triggered input synchronized to host I²C master; requires external pull-up; Schmitt-triggered for noise immunity.
SDA	Bidirectional Data I/O	Open-drain output requiring external pull-up; transmits/receives addresses and data; supports ACK/NACK signaling per I²C protocol.
WP	Hardware Write-Protect Input	Logic-high (V_CC) disables all write operations including byte/page writes; no software lock required for secure factory defaults.
V_SS	Ground Reference	Primary return path for all internal circuitry and I/O; must be low-impedance to minimize ground bounce during SDA transitions.
V_CC	Power Supply	Supplies core logic and EEPROM array; bypass capacitor (0.1 µF) recommended near pin to suppress switching noise during write cycles.

Key Features

Feature	Design Value
Page Write Buffer (8 bytes)	Reduces I²C transaction overhead by enabling up to 8 sequential bytes per Stop condition, cutting bus occupancy vs. single-byte writes.
Schmitt Trigger Inputs	Provides ≥50 mV hysteresis on SCL/SDA to reject sub-50 ns noise spikes - critical for reliable operation in electrically noisy motor or power-conversion environments.
Output Slope Control	Slows SDA fall time to limit di/dt-induced ground bounce, preventing false Start/Stop detection on shared PCB ground planes.
Hardware Write-Protect (WP)	Eliminates need for software-based lock bits or command sequences - prevents accidental overwrites during firmware updates or brown-out recovery.
ESD Protection >4 kV	Meets HBM Class 2 requirements, allowing safe handling and board-level integration without additional transient suppression components.

Applications

Industrial Sensor Calibration	Automotive Body Controller
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed once at power-up; no real-time timing constraints. Use Value: Enables one-time calibration during manufacturing without requiring external microcontroller NVM or costly laser trimming.	Use Scenario: Retaining seat position memory, mirror angle presets, and lighting configuration in vehicle body control modules. IC Role / Device Role / Timing Role: Low-bandwidth I²C slave storing user preferences; operates within 125°C ambient under-dash environment. Use Value: Qualified to AEC-Q100 Grade 1 (E-temp), ensuring data integrity across full automotive temperature range without derating.
Medical Diagnostic Device	Smart Energy Meter
Use Scenario: Saving last-measured vital sign thresholds and alarm limits in portable patient monitors between battery changes. IC Role / Device Role / Timing Role: Infrequent write-on-change storage; reads occur at startup and during settings navigation. Use Value: 200-year data retention guarantees clinical configuration persistence over product lifetime without backup power or refresh routines.	Use Scenario: Recording tariff schedules, billing cycle counters, and tamper-event logs in utility-grade electricity meters. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage interfaced to metering SoC via isolated I²C bus. Use Value: 1 million write cycles support daily log entries for >2,700 days (7.4 years), exceeding typical meter deployment intervals.

Industrial Sensor Calibration

Automotive Body Controller

Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers.

IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed once at power-up; no real-time timing constraints.

Use Value: Enables one-time calibration during manufacturing without requiring external microcontroller NVM or costly laser trimming.

Use Scenario: Retaining seat position memory, mirror angle presets, and lighting configuration in vehicle body control modules.

IC Role / Device Role / Timing Role: Low-bandwidth I²C slave storing user preferences; operates within 125°C ambient under-dash environment.

Use Value: Qualified to AEC-Q100 Grade 1 (E-temp), ensuring data integrity across full automotive temperature range without derating.

Medical Diagnostic Device

Smart Energy Meter

Use Scenario: Saving last-measured vital sign thresholds and alarm limits in portable patient monitors between battery changes.

IC Role / Device Role / Timing Role: Infrequent write-on-change storage; reads occur at startup and during settings navigation.

Use Value: 200-year data retention guarantees clinical configuration persistence over product lifetime without backup power or refresh routines.

Use Scenario: Recording tariff schedules, billing cycle counters, and tamper-event logs in utility-grade electricity meters.

IC Role / Device Role / Timing Role: High-reliability nonvolatile storage interfaced to metering SoC via isolated I²C bus.

Use Value: 1 million write cycles support daily log entries for >2,700 days (7.4 years), exceeding typical meter deployment intervals.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
24AA01T-I/OT	Wider V_CC range (1.7–5.5V); lower 100 kHz max clock below 2.5V; rated only for -40°C to +85°C.	Not qualified for extended temperature; unsuitable for under-hood or high-ambient industrial use.	Select only if system operates below 2.5V or requires broader voltage flexibility at cost of temperature rating.
24FC01T-E/OT	Supports 1 MHz I²C clock; same V_CC range (1.7–5.5V); identical package and pinout.	Higher speed enables faster firmware update staging or bulk parameter loading in time-critical systems.	Choose when bus bandwidth exceeds 400 kHz requirement and full 1.7V compatibility is needed.

Compared with 24LC01BT-E/OT, the 24AA01T-I/OT trades extended temperature support for lower-voltage operation, while the 24FC01T-E/OT delivers 2.5× higher I²C throughput without changing layout or firmware interface logic.

Availability

24LC01BT-E/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control, medical diagnostics, and smart energy metering requiring stable component supply across extended temperature and high-reliability lifecycles.

Supply support for 24LC01BT-E/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 leading provider of microcontrollers, analog, FPGA, and memory solutions, serving industrial, automotive, and consumer markets with vertically integrated design and manufacturing.

The 24LC01B series targets cost-sensitive, space-constrained embedded systems needing robust, low-power nonvolatile storage with simple I²C integration and extended-temperature reliability.

FAQ

What is the minimum V_CC required for reliable operation of the 24LC01BT-E/OT?

The 24LC01BT-E/OT requires a minimum V_CC of 2.5V for guaranteed operation across its full extended temperature range (-40°C to +125°C). Operation below 2.5V is not specified and may result in failed writes, incorrect reads, or loss of I²C timing compliance. This distinguishes it from the 24AA01, which supports down to 1.7V.

How does the WP pin function on the 24LC01BT-E/OT?

The WP pin on the 24LC01BT-E/OT is a hardware write-protection input. When tied to V_CC, it disables all write operations (byte and page) to the entire memory array (addresses 00h–7Fh), while read operations remain fully functional. When tied to V_SS, normal read/write access is enabled. No internal pull-up or pull-down is present, so external connection is mandatory.

Can the 24LC01BT-E/OT be used in AEC-Q100-compliant automotive designs?

Yes, the 24LC01BT-E/OT is AEC-Q100 qualified for Grade 1 (−40°C to +125°C), making it suitable for automotive body electronics, infotainment, and powertrain auxiliary functions. Its qualification covers stress testing for temperature cycling, humidity, ESD, and electrical performance - confirmed in Microchip's official AEC-Q100 report for this part number.

What is the maximum page write size supported by the 24LC01BT-E/OT?

The 24LC01BT-E/OT supports an 8-byte page write buffer. Up to eight consecutive bytes can be loaded into the buffer during a single I²C transaction and written to memory upon receipt of the Stop condition. Attempting to write more than eight bytes before Stop causes wraparound within the current page boundary, potentially overwriting earlier data in that page.

Is the 24LC01BT-E/OT pin-compatible with other members of the 24XX01 family in SC-70 packaging?

Yes, the 24LC01BT-E/OT shares identical 5-pin SC-70 (LT) pinout and footprint with 24AA01T-I/OT and 24FC01T-E/OT. All three have SCL, SDA, WP, V_SS, and V_CC in the same physical arrangement, enabling direct substitution where voltage, speed, and temperature requirements align - though firmware must verify device identity via I²C address response.

24LC01BT-E/OT Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 1Kbit

Memory Organization:: 128 x 8

Memory Interface:: I2C

Clock Frequency:: 400 kHz

Write Cycle Time - Word, Page:: 5ms

Access Time:: 3.5 µs

Voltage - Supply:: 2.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

24LC01BT-E/OT FAQ

1.How can I place an order for 24LC01BT-E/OT through Aetrix?

Please submit a Request for Quotation (RFQ) for 24LC01BT-E/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 24LC01BT-E/OT reliable?

The price and inventory of 24LC01BT-E/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC01BT-E/OT is usually 5 days.

3.What payment methods are accepted for 24LC01BT-E/OT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC01BT-E/OT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24LC01BT-E/OT?

24LC01BT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24LC01BT-E/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 24LC01BT-E/OT?

For technical support, including 24LC01BT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC01BT-E/OT requirements.

6.How does Aetrix verify that 24LC01BT-E/OT is sourced from the original manufacturer or authorized distributors?

All 24LC01BT-E/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 24LC01BT-E/OT meets industry standards.

7.What is the process for return or replacement of 24LC01BT-E/OT?

All 24LC01BT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC01BT-E/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 24LC01BT-E/OT part is unused and in its original packaging.

Return procedure for 24LC01BT-E/OT:

1.Submit a request within 90 days.

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

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