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

Microchip Technology 24AA014-I/ST

Name: 24AA014-I/ST
Brand: Microchip Technology
SKU: 24AA014-I/ST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 24AA014-I/ST

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: 24AA014-I/ST.pdf

Description:: IC EEPROM 1KBIT I2C 8TSSOP

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Product details

Overview

24AA014-I/ST from Microchip Technology is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with industrial temperature range (−40°C to +85°C), 1.7V–5.5V supply operation, and hardware write protection via the WP pin. It supports up to 400 kHz clock rate at V_CC ≥ 1.8V, features 16-byte page write buffer, and delivers 1 μA standby current and 1 mA active current. It is used in embedded systems for storing calibration data, configuration settings, and firmware parameters.

For engineers reviewing the 24AA014-I/ST datasheet, 24AA014-I/ST pinout, 24AA014-I/ST application, or 24AA014-I/ST equivalent, key selection criteria include low-voltage operation down to 1.7V, I²C bus compatibility with multi-device addressing (up to eight devices), hardware write protection, 5 ms max write cycle time, and endurance of 1 million erase/write cycles.

Technical Context

The 24AA014-I/ST implements a two-wire I²C interface with slave-only operation, using Schmitt-trigger inputs on SDA and SCL for noise immunity. Its internal address counter enables sequential reads across the full 128-byte memory space, with automatic rollover from address 0x7F to 0x00.

Write operations are controlled by the WP pin: tied to VSS for full write enable, or VCC for complete array write protection. Page writes are limited to 16-byte boundaries aligned to physical page starts (e.g., addresses 0x00–0x0F), and crossing boundaries causes wraparound-not cross-page writes.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	1 Kbit (128 × 8-bit), single-block organization - simplifies address management and eliminates bank switching logic.
Supply voltage	1.7V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters.
I²C clock rate	Up to 400 kHz (≥1.8V); 100 kHz (1.7V ≤ V_CC < 1.8V) - supports high-speed configuration loading while maintaining robustness at ultra-low voltage.
Write endurance	1,000,000 erase/write cycles - suitable for frequent parameter updates in field-deployed industrial controllers.
Data retention	Greater than 200 years at 25°C - ensures long-term reliability for unattended equipment with infrequent maintenance.
Standby current	1 μA typical at 5.5V - minimizes power budget impact in battery-backed or energy-harvesting applications.
Page write buffer	16 bytes - reduces I²C transaction count for bulk configuration writes, improving bus efficiency and reducing host CPU overhead.

Pinout & Package

24AA014-I/ST is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with 150-mil body width, RoHS-compliant matte tin plating, and industrial-grade thermal rating (−40°C to +85°C).

Pin/Terminal	Circuit Role	Design Meaning
A0	Chip address input	LSB of 3-bit hardware slave address; hardwired to VSS or VCC to select one of eight possible I²C addresses on shared bus.
A1	Chip address input	Middle bit of slave address; determines device uniqueness alongside A0 and A2 in multi-EEPROM systems.
A2	Chip address input	MSB of slave address; enables up to eight 24AA014-I/ST devices on same I²C bus without software address remapping.
VSS	Ground reference	Return path for all internal circuitry; must be connected directly to system ground plane for stable read/write timing.
SDA	Serial data I/O	Open-drain bidirectional line requiring external pull-up resistor (2 kΩ for 400 kHz, 10 kΩ for 100 kHz); carries address, command, and data.
SCL	Serial clock input	Master-generated clock synchronizing all data transfers; rising edge samples data, falling edge allows data change.
WP	Write-protect control	Active-high hardware lock: tied to VCC disables all writes but permits unlimited reads - critical for safeguarding factory calibration data.
VCC	Power supply	Single 1.7–5.5V supply powers logic and EEPROM array; no separate V_PP or charge pump required.

Key Features

Feature	Design Value
Low-voltage operation	Functional down to 1.7V - eliminates need for voltage regulators in 1.8V microcontroller systems, reducing BOM cost and board area.
Hardware write protection	Dedicated WP pin with VCC/VSS logic-level control - prevents accidental overwrites during power transients or firmware glitches without software intervention.
I²C bus scalability	Three address pins (A0–A2) support up to eight devices on one bus - enables modular design with distributed nonvolatile storage per subsystem (e.g., sensor node, actuator, power stage).
Page write capability	16-byte buffer allows single I²C transaction to program up to 16 contiguous bytes - cuts firmware update time by ~85% vs. byte-by-byte writes.
High endurance & retention	1M cycles / >200-year data retention - validated for use in automotive ECUs, medical diagnostics, and industrial PLCs where field replacement is costly or impractical.

Applications

Industrial Sensor Calibration	Medical Device Configuration
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog front-end sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-on initialization; WP pin held high after calibration to prevent runtime corruption. Use Value: Eliminates manual potentiometer adjustment and enables automated calibration in production test, reducing labor cost and improving repeatability.	Use Scenario: Holding user-selected therapy parameters (e.g., dose rate, duration, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Secure parameter archive with write-protection enforced during therapy delivery; retains settings across battery swaps and power loss. Use Value: Ensures treatment continuity and regulatory compliance (IEC 62304) by guaranteeing parameter persistence without volatile RAM backup.
Automotive Body Control Module	Consumer Appliance Settings Storage
Use Scenario: Saving seat/mirror position memory and lighting preferences in 12V vehicle body control units. IC Role / Device Role / Timing Role: I²C slave storing user profiles; operates reliably across automotive cold-crank (6.0V) to load-dump (40V) transients via internal regulation. Use Value: Supports OEM personalization features without adding MCU flash wear or requiring complex EEPROM emulation software.	Use Scenario: Retaining cooking mode history, child-lock status, and language selection in smart ovens and washing machines. IC Role / Device Role / Timing Role: Low-power configuration keeper accessed only during UI setup or power-up; draws <1 μA in standby to extend appliance standby battery life. Use Value: Enables CE/UKCA compliance for energy labeling (ERP Directive) by minimizing always-on power consumption in connected home appliances.

Industrial Sensor Calibration

Medical Device Configuration

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

IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-on initialization; WP pin held high after calibration to prevent runtime corruption.

Use Value: Eliminates manual potentiometer adjustment and enables automated calibration in production test, reducing labor cost and improving repeatability.

Use Scenario: Holding user-selected therapy parameters (e.g., dose rate, duration, alarm thresholds) in portable infusion pumps.

IC Role / Device Role / Timing Role: Secure parameter archive with write-protection enforced during therapy delivery; retains settings across battery swaps and power loss.

Use Value: Ensures treatment continuity and regulatory compliance (IEC 62304) by guaranteeing parameter persistence without volatile RAM backup.

Automotive Body Control Module

Consumer Appliance Settings Storage

Use Scenario: Saving seat/mirror position memory and lighting preferences in 12V vehicle body control units.

IC Role / Device Role / Timing Role: I²C slave storing user profiles; operates reliably across automotive cold-crank (6.0V) to load-dump (40V) transients via internal regulation.

Use Value: Supports OEM personalization features without adding MCU flash wear or requiring complex EEPROM emulation software.

Use Scenario: Retaining cooking mode history, child-lock status, and language selection in smart ovens and washing machines.

IC Role / Device Role / Timing Role: Low-power configuration keeper accessed only during UI setup or power-up; draws <1 μA in standby to extend appliance standby battery life.

Use Value: Enables CE/UKCA compliance for energy labeling (ERP Directive) by minimizing always-on power consumption in connected home appliances.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
24LC014-I/ST	Requires minimum 2.5V V_CC; no operation below 2.5V - lacks 1.7V capability of 24AA014-I/ST.	Not suitable for 1.8V-only systems; otherwise identical pinout, timing, and memory map.	Select when operating exclusively in 2.5–5.5V domains and legacy 24LC part numbering is required.
AT24C01D-SSHM-T	1.7–5.5V compatible; 400 kHz I²C; 128 × 8-bit layout - functionally equivalent but uses different device addressing scheme (A0/A1 only, no A2).	Supports only four devices per bus (vs. eight); requires firmware address mapping update if replacing existing 24AA014-I/ST designs.	Choose for new designs prioritizing second-source availability and extended qualification (AEC-Q100 Grade 2 option available).

Compared with 24LC014-I/ST and AT24C01D-SSHM-T, the 24AA014-I/ST uniquely supports true 1.7V operation - critical for battery-powered IoT nodes and energy-harvesting sensors - while retaining full 8-device bus scalability and identical SOIC-8 footprint.

Availability

24AA014-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and consumer appliance settings storage requiring stable component supply across extended product lifecycles.

Supply support for 24AA014-I/ST 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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24AA014-I/ST belongs to Microchip's 24AAxx family of I²C EEPROMs, designed specifically for reliable, low-power, and voltage-flexible nonvolatile data storage in space-constrained embedded systems.

FAQ

What is the minimum operating voltage for the 24AA014-I/ST?

The 24AA014-I/ST operates down to 1.7V, enabling direct integration with 1.8V microcontrollers and low-power sensor nodes without level-shifting circuitry. This specification is verified across the full industrial temperature range (−40°C to +85°C) and applies to both read and write operations, including self-timed write cycles.

Does the 24AA014-I/ST support standard I²C protocol?

Yes, the 24AA014-I/ST is fully I²C™-compatible, supporting standard-mode (100 kHz) and fast-mode (400 kHz) signaling. It responds to the 7-bit slave address format with control code '1010', three chip-select bits (A2–A0), and R/W bit - matching I²C specification Rev. 6 requirements for timing, acknowledge behavior, and bus arbitration.

How many devices can share the same I²C bus with the 24AA014-I/ST?

Up to eight 24AA014-I/ST devices can operate on a single I²C bus using unique combinations of A0, A1, and A2 address pins. Each device is assigned a distinct 7-bit slave address (1010xxx), allowing contiguous 8 Kbit memory expansion through software-managed address bit mapping (A2=A10, A1=A9, A0=A8).

What is the purpose of the WP pin on the 24AA014-I/ST?

The WP (Write-Protect) pin on the 24AA014-I/ST provides hardware-level write inhibition: when tied to VCC, all write operations (byte and page) are blocked while read access remains fully functional. This prevents accidental or malicious overwrites of critical calibration data, even during firmware crashes or power faults.

What is the maximum write cycle time for the 24AA014-I/ST?

The 24AA014-I/ST has a maximum write cycle time of 5 ms for both byte and page writes, covering internal auto-erase, programming, and verification. This value is guaranteed across the full operating voltage (1.7–5.5V) and temperature (−40°C to +85°C) range, and must be observed before initiating subsequent I²C transactions.

24AA014-I/ST Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Active

Programmable:: Not 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:: 900 ns

Voltage - Supply:: 1.7V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP

24AA014-I/ST FAQ

1.How can I place an order for 24AA014-I/ST through Aetrix?

Please submit a Request for Quotation (RFQ) for 24AA014-I/ST 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 24AA014-I/ST reliable?

The price and inventory of 24AA014-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA014-I/ST is usually 5 days.

3.What payment methods are accepted for 24AA014-I/ST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA014-I/ST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24AA014-I/ST?

24AA014-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24AA014-I/ST 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 24AA014-I/ST?

For technical support, including 24AA014-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA014-I/ST requirements.

6.How does Aetrix verify that 24AA014-I/ST is sourced from the original manufacturer or authorized distributors?

All 24AA014-I/ST 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 24AA014-I/ST meets industry standards.

7.What is the process for return or replacement of 24AA014-I/ST?

All 24AA014-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA014-I/ST, 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 24AA014-I/ST part is unused and in its original packaging.

Return procedure for 24AA014-I/ST:

1.Submit a request within 90 days.

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

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