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Microchip Technology 24LC014HT-E/ST

Name: 24LC014HT-E/ST
Brand: Microchip Technology
SKU: 24LC014HT-E/ST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 24LC014HT-E/ST

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: 24LC014HT-E/ST.pdf

Description:: IC EEPROM 1KBIT I2C 1MHZ 8TSSOP

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Product details

Overview

24LC014HT-E/ST from Microchip Technology Inc. is a 1 Kbit (128 × 8) I²C-compatible serial EEPROM with hardware write protection for the upper half-array (40h–7Fh), 1 MHz max clock support at 2.5V–5.5V, and automotive-grade operation from −40°C to +125°C. It features Schmitt-trigger inputs, slope-controlled outputs, 16-byte page write buffer, and 1 million erase/write cycles - deployed in engine control units, battery management systems, and automotive infotainment configuration storage.

For engineers reviewing the 24LC014HT-E/ST datasheet, 24LC014HT-E/ST pinout, 24LC014HT-E/ST application, or 24LC014HT-E/ST equivalent, this page delivers verified electrical specs, validated pin functions, confirmed automotive temperature compliance, real-world use cases, and two technically documented alternative parts for design continuity.

Technical Context

The 24LC014HT-E/ST implements a standard I²C slave interface with fixed 7-bit address prefix '1010', three programmable chip-select bits (A0–A2), and R/W bit control. Its internal architecture includes an address pointer, page buffer, HV generator for EEPROM programming, and dedicated write-protect logic tied to the WP pin.

It supports byte and page write modes with self-timed internal erase/write cycles (max 5 ms), acknowledges only after successful address matching, and disables write operations during active VCC < 1.5 V via built-in threshold detection. Noise immunity is achieved through Schmitt-trigger inputs and 50 ns input filter spike suppression on SDA/SCL.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1 Kbit (128 × 8-bit array), organized as single block - enables simple address mapping without bank switching.
Interface	I²C-compatible 2-wire bus (SDA/SCL), supports 100 kHz / 400 kHz / 1 MHz - compatible with legacy and high-speed microcontroller peripherals.
VCC Range	2.5 V to 5.5 V - validated for automotive 3.3 V and 5 V supply rails; excludes sub-2.5 V operation.
Temperature Grade	Automotive (E): −40°C to +125°C - qualified per AEC-Q100 stress test requirements for under-hood applications.
Write Endurance	1 million erase/write cycles - specified at 25°C, VCC = 5.5 V; ensures long-term reliability in firmware parameter logging.
Data Retention	200 years - guaranteed minimum retention at +85°C; critical for safety-critical calibration data storage.
Write Protection	Hardware-enabled half-array protection (addresses 40h–7Fh) via WP pin tied to VCC - prevents accidental overwrite of critical configuration sectors.

Pinout & Package

24LC014HT-E/ST is supplied in an 8-pin TSSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant and Pb-free. Pin numbering follows standard JEDEC MS-012AA outline.

Pin/Terminal	Circuit Role	Design Meaning
A0	Chip Select Input	User-configurable LSB of 3-bit device address; allows up to eight devices on same I²C bus when combined with A1/A2.
A1	Chip Select Input	Middle bit of device address; must be hard-wired to VSS or VCC - not floating - to ensure deterministic slave selection.
A2	Chip Select Input	MSB of device address; sets unique I²C slave address (1010 A2 A1 A0 R/W); enables contiguous 8 Kbit expansion across devices.
VSS	Ground Reference	Primary return path for all internal circuitry; requires low-impedance connection to system ground plane.
SDA	Serial Data I/O	Open-drain bidirectional line; requires external pull-up resistor (2 kΩ typical for 1 MHz operation); transmits/receives addresses and data.
SCL	Serial Clock Input	Master-generated clock signal; synchronizes all data transfers; Schmitt-trigger input rejects noise below 50 ns spikes.
WP	Write-Protect Control	Active-high enable: tie to VCC to lock addresses 40h–7Fh; tie to VSS for full-array write access.
VCC	Power Supply	2.5 V–5.5 V operating range; internal voltage detector disables writes if VCC drops below 1.5 V nominal.

Key Features

Feature	Design Value
1 MHz I²C Compatibility	Validated timing at 2.5 V–5.5 V (THIGH ≥ 500 ns, TLOW ≥ 500 ns) - enables faster parameter updates in real-time automotive subsystems.
Page Write Buffer (16 bytes)	Reduces total write time vs. byte writes; allows burst programming of configuration blocks without intermediate stop conditions.
Schmitt Trigger + 50 ns Filtering	Eliminates false Start/Stop detection on noisy vehicle harnesses; meets ISO 11898-2 EMC robustness expectations.
Half-Array Hardware Write Protect	Physically isolates critical calibration data (e.g., sensor offsets, trim values) from firmware update routines - no software dependency required.
1 μA Standby Current (max)	Enables always-on storage in low-power modules (e.g., key fob receivers, tire pressure sensors) without draining backup batteries.

Applications

Engine Control Unit (ECU)	Advanced Driver Assistance Systems (ADAS)
Use Scenario: Storing adaptive learning parameters (e.g., fuel trim corrections, knock sensor thresholds) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibrated values updated during closed-loop operation. Use Value: Enables self-tuning behavior without requiring reprogramming after battery disconnect; leverages 200-year data retention and automotive temp grade.	Use Scenario: Saving camera calibration coefficients and radar offset adjustments during vehicle assembly and service recalibration. IC Role / Device Role / Timing Role: Secure, write-protected storage for safety-critical alignment data used by vision processing SoCs. Use Value: Hardware WP pin prevents accidental overwrites during OTA updates; 1 million endurance supports repeated shop-floor recalibrations.
Electric Vehicle Battery Management System (BMS)	Automotive Infotainment Configuration
Use Scenario: Recording cell balancing history, thermal derating logs, and SOC calibration deltas across charge/discharge cycles. IC Role / Device Role / Timing Role: Low-power, high-reliability event logger interfaced to BMS MCU via I²C at 400 kHz. Use Value: 1 μA standby current minimizes parasitic drain on auxiliary 12 V rail; 125°C rating survives under-hood thermal environments.	Use Scenario: Maintaining user preferences (e.g., display brightness, audio EQ, language settings) across power-down events in head units. IC Role / Device Role / Timing Role: Persistent settings store accessed during boot sequence using standard I²C read protocol. Use Value: Page write capability enables fast bulk restore of UI state; TSSOP package fits compact PCB layouts in space-constrained dash designs.

Engine Control Unit (ECU)

Advanced Driver Assistance Systems (ADAS)

Use Scenario: Storing adaptive learning parameters (e.g., fuel trim corrections, knock sensor thresholds) that persist across ignition cycles.

IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibrated values updated during closed-loop operation.

Use Value: Enables self-tuning behavior without requiring reprogramming after battery disconnect; leverages 200-year data retention and automotive temp grade.

Use Scenario: Saving camera calibration coefficients and radar offset adjustments during vehicle assembly and service recalibration.

IC Role / Device Role / Timing Role: Secure, write-protected storage for safety-critical alignment data used by vision processing SoCs.

Use Value: Hardware WP pin prevents accidental overwrites during OTA updates; 1 million endurance supports repeated shop-floor recalibrations.

Electric Vehicle Battery Management System (BMS)

Automotive Infotainment Configuration

Use Scenario: Recording cell balancing history, thermal derating logs, and SOC calibration deltas across charge/discharge cycles.

IC Role / Device Role / Timing Role: Low-power, high-reliability event logger interfaced to BMS MCU via I²C at 400 kHz.

Use Value: 1 μA standby current minimizes parasitic drain on auxiliary 12 V rail; 125°C rating survives under-hood thermal environments.

Use Scenario: Maintaining user preferences (e.g., display brightness, audio EQ, language settings) across power-down events in head units.

IC Role / Device Role / Timing Role: Persistent settings store accessed during boot sequence using standard I²C read protocol.

Use Value: Page write capability enables fast bulk restore of UI state; TSSOP package fits compact PCB layouts in space-constrained dash designs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT24C01C-SSHM-T	1 Kbit I²C EEPROM, 1.7V–5.5V VCC, industrial temp (−40°C to +85°C), no hardware WP pin.	Lacks half-array write protection; requires software-based locking or external logic for critical data isolation.	Select when cost sensitivity outweighs need for hardware-level write security and automotive temperature range is not required.
BR24G01NUX-5TR	1 Kbit I²C EEPROM, 1.6V–5.5V VCC, automotive grade (−40°C to +125°C), built-in WP function but different pinout (WP on pin 3, not pin 7).	Requires PCB layout revision due to non-identical pin mapping; WP functionality implemented differently (active-low vs. active-high).	Choose only if redesigning board layout is acceptable and BR24G01NUX-5TR's lower 1.6 V min VCC supports ultra-low-voltage subsystems.

Compared with AT24C01C-SSHM-T and BR24G01NUX-5TR, the 24LC014HT-E/ST uniquely combines automotive temperature qualification, pin-identical hardware write protection, and 1 MHz I²C speed - making it the only drop-in option for existing TSSOP-based ECU designs requiring guaranteed data integrity under harsh conditions.

Availability

24LC014HT-E/ST is available at Aetrix Electronics and suitable for engine control units, battery management systems, and ADAS modules requiring stable component supply across extended product lifecycles and automotive qualification standards.

Supply support for 24LC014HT-E/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 manufacturing and support infrastructure.

The 24LC014H family was designed specifically for automotive and industrial applications demanding high reliability, extended temperature operation, and robust I²C communication - targeting ECU, BMS, and telematics subsystems where data integrity is safety-critical.

FAQ

What is the maximum I²C clock frequency supported by the 24LC014HT-E/ST?

The 24LC014HT-E/ST supports up to 1 MHz I²C clock frequency when operated within its specified VCC range of 2.5 V to 5.5 V and temperature grade (−40°C to +125°C). This is explicitly confirmed in the Device Selection Table and AC Characteristics section of DS22077B, distinguishing it from the 24AA014H variant limited to 400 kHz. The 24LC014HT-E/ST achieves this via optimized internal timing and reduced THIGH/TLOW requirements.

Does the 24LC014HT-E/ST include hardware write protection, and how is it enabled?

Yes, the 24LC014HT-E/ST includes hardware write protection for the upper half of its memory array (addresses 40h–7Fh). This feature is activated by tying the WP pin (pin 7) to VCC. When WP = VCC, writes to that protected region are blocked; writes to the lower half (00h–3Fh) remain permitted. If WP is tied to VSS, full-array write access is enabled. This behavior is electrically enforced and does not require firmware intervention.

What package type is used for the 24LC014HT-E/ST, and what are its key mechanical dimensions?

The 24LC014HT-E/ST uses an 8-pin TSSOP package (JEDEC MO-153 variant), marked "T" in Microchip's packaging nomenclature. Its body dimensions are 3.0 mm × 4.4 mm, with 0.65 mm lead pitch and 1.2 mm maximum height. This compact surface-mount package supports automated assembly and meets IPC/JEDEC standards for automotive-grade thermal cycling and moisture sensitivity level (MSL) 1.

How many devices can share the same I²C bus with the 24LC014HT-E/ST, and what determines uniqueness?

Up to eight 24LC014HT-E/ST devices can operate on the same I²C bus. Uniqueness is determined by the combination of the fixed 4-bit control code (1010b) and the three user-configurable chip-select inputs A0, A1, and A2. Each device must have a distinct A2:A1:A0 logic state (e.g., 000, 001, ..., 111) to generate a unique 7-bit slave address (1010 A2 A1 A0), enabling individual addressing without bus contention.

What is the endurance and data retention specification for the 24LC014HT-E/ST?

The 24LC014HT-E/ST is rated for 1 million erase/write cycles and guarantees 200 years of data retention at +85°C. These specifications are confirmed in the Features list and Electrical Characteristics tables of DS22077B. Endurance is characterized at 25°C and VCC = 5.5 V; retention is extrapolated from accelerated testing per industry-standard models and applies to stored data across the full automotive temperature range.

24LC014HT-E/ST Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Tape & Reel (TR)

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:: 1 MHz

Write Cycle Time - Word, Page:: 5ms

Access Time:: 400 ns

Voltage - Supply:: 2.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP

24LC014HT-E/ST FAQ

1.How can I place an order for 24LC014HT-E/ST through Aetrix?

Please submit a Request for Quotation (RFQ) for 24LC014HT-E/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 24LC014HT-E/ST reliable?

The price and inventory of 24LC014HT-E/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC014HT-E/ST is usually 5 days.

3.What payment methods are accepted for 24LC014HT-E/ST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC014HT-E/ST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24LC014HT-E/ST?

24LC014HT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24LC014HT-E/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 24LC014HT-E/ST?

For technical support, including 24LC014HT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC014HT-E/ST requirements.

6.How does Aetrix verify that 24LC014HT-E/ST is sourced from the original manufacturer or authorized distributors?

All 24LC014HT-E/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 24LC014HT-E/ST meets industry standards.

7.What is the process for return or replacement of 24LC014HT-E/ST?

All 24LC014HT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC014HT-E/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 24LC014HT-E/ST part is unused and in its original packaging.

Return procedure for 24LC014HT-E/ST:

1.Submit a request within 90 days.

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

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