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

Microchip Technology 24LC1025T-E/SN16KVAO

Name: 24LC1025T-E/SN16KVAO
Brand: Microchip Technology
SKU: 24LC1025T-E/SN16KVAO
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 24LC1025T-E/SN16KVAO

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: 24LC1025T-E/SN16KVAO.pdf

Description:: IC EEPROM 1MBIT I2C 400KHZ 8SOIC

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Product details

Overview

24LC1025T-E/SN16KVAO from Microchip Technology Inc. is a 128K × 8 (1024 kbit) I²C-compatible serial EEPROM with hardware write-protection, 128-byte page buffer, and operation across 2.5V–5.5V supply. It supports up to 400 kHz clock (100 kHz at V_CC < 4.5V in automotive temp), delivers ≤450 µA read current, and enables nonvolatile data storage in automotive infotainment control modules.

For engineers reviewing the 24LC1025T-E/SN16KVAO datasheet, 24LC1025T-E/SN16KVAO pinout, 24LC1025T-E/SN16KVAO application, or 24LC1025T-E/SN16KVAO equivalent, key selection criteria include automotive-grade temperature range (−40°C to +125°C), hardware WP pin behavior, cascading support for up to four devices on one bus, and 128-byte page write capability with self-timed erase/write cycle.

Technical Context

The 24LC1025T-E/SN16KVAO implements a two-wire I²C interface with Schmitt-trigger inputs on SDA/SCL for noise immunity and slope-controlled outputs to suppress ground bounce. Its internal address counter supports contiguous reads within 512 kbit segments (00000h–0FFFFh and 10000h–1FFFFh), with block select bit B₀ enabling access to either half of the 1024 kbit array.

Write protection is enforced via the WP pin: tied to V_CC, it inhibits all writes while permitting reads; tied to V_SS, full read/write access is enabled. The device uses a 128-byte page latch for efficient bulk writes and requires A₂ to be hard-wired to V_CC for defined operation-floating or low A₂ yields undefined behavior.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	128K × 8 (1024 kbit); provides sufficient nonvolatile storage for firmware configuration, calibration data, and event logs in automotive ECUs.
Supply voltage	2.5V–5.5V; compatible with standard 3.3V and 5V automotive power rails without level-shifting.
Max clock frequency	400 kHz (at V_CC ≥ 4.5V); 100 kHz at lower V_CC; ensures reliable timing margins in noisy vehicle environments.
Write endurance	1,000,000 cycles per page; supports frequent logging in telematics or ADAS sensor calibration applications.
Data retention	200 years at +85°C; guarantees long-term integrity of safety-critical settings over vehicle lifetime.
Operating temperature	−40°C to +125°C (Automotive E-temp grade); qualified for under-hood and infotainment module deployment.
Page write time	3 ms typical; enables fast batch updates without blocking host MCU for extended periods.

Pinout & Package

24LC1025T-E/SN16KVAO is housed in an 8-lead SOIC package (3.90 mm width), RoHS-compliant and Pb-free, with standard 1.27 mm pitch. Pin 1 is A₀; pin 8 is V_CC. A₂ must be externally tied to V_CC for guaranteed operation.

Pin/Terminal	Circuit Role	Design Meaning
A₀	Chip address input	User-configurable LSB of slave address; enables up to four devices on same I²C bus when combined with A₁.
A₁	Chip address input	User-configurable MSB of slave address; used with A₀ to form 2-bit device select code (00–11).
A₂	Non-configurable chip select	Must be hard-wired to V_CC; floating or grounded causes undefined operation.
V_SS	Ground reference	Common return path for all internal circuitry; requires low-impedance connection to system GND plane.
SDA	Serial data bidirectional I/O	Open-drain I²C data line requiring external pull-up resistor (2 kΩ typical for 400 kHz).
SCL	Serial clock input	Master-generated clock signal synchronizing all data transfers; Schmitt-trigger input rejects noise.
WP	Hardware write-protect input	Logic high = full array write-inhibited; logic low = write enabled; sampled only at Stop condition.
V_CC	Power supply	Accepts 2.5V–5.5V; powers EEPROM core, interface logic, and charge pump for write operations.

Key Features

Feature	Design Value
128-byte page write buffer	Reduces I²C transaction overhead by allowing up to 128 bytes to be written per Stop-initiated cycle, improving firmware update efficiency.
Schmitt-trigger inputs on SDA/SCL	Provides >50 ns spike suppression and hysteresis (0.05×V_CC), ensuring robust communication in electrically noisy automotive harnesses.
Hardware write-protect (WP)	Enables fail-safe configuration locking: permanent protection against accidental or malicious writes during field operation.
Cascadable architecture (up to 4 devices)	Supports 4 Mbit total system EEPROM using shared I²C bus-ideal for multi-module systems like body control units.
Self-timed erase/write cycle	Eliminates need for external timing control; host MCU can poll ACK to determine completion, maximizing bus utilization.

Applications

Automotive Infotainment Configuration Storage	ADAS Sensor Calibration Data Retention
Use Scenario: Storing user preferences, display settings, and audio profiles in head unit modules across vehicle model years. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime; retains data through ignition cycles. Use Value: Enables consistent UI experience and reduces factory reprogramming; 200-year data retention exceeds vehicle service life.	Use Scenario: Holding factory-calibrated offset/gain values for radar or camera sensors subject to thermal drift. IC Role / Device Role / Timing Role: High-reliability parameter store updated only during service mode; accessed at startup for sensor initialization. Use Value: Maintains sensor accuracy over −40°C to +125°C ambient; 1M-cycle endurance supports recalibration during warranty service.
Body Control Module (BCM) Fault Log	Telematics Gateway Event History
Use Scenario: Recording diagnostic trouble codes (DTCs), timestamped fault events, and reset counters in BCM firmware. IC Role / Device Role / Timing Role: Sequential-write log buffer with wraparound addressing; accessed via random read for DTC retrieval. Use Value: Survives battery disconnect; 128-byte page writes minimize MCU intervention during fault capture bursts.	Use Scenario: Archiving GPS position snapshots, CAN bus error counts, and cellular connection status for remote diagnostics. IC Role / Device Role / Timing Role: Persistent event recorder interfaced to microcontroller's I²C peripheral; updated asynchronously during network idle periods. Use Value: Automotive-grade temp range ensures reliability in trunk-mounted gateways; hardware WP prevents overwrite during OTA updates.

Automotive Infotainment Configuration Storage

ADAS Sensor Calibration Data Retention

Use Scenario: Storing user preferences, display settings, and audio profiles in head unit modules across vehicle model years.

IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime; retains data through ignition cycles.

Use Value: Enables consistent UI experience and reduces factory reprogramming; 200-year data retention exceeds vehicle service life.

Use Scenario: Holding factory-calibrated offset/gain values for radar or camera sensors subject to thermal drift.

IC Role / Device Role / Timing Role: High-reliability parameter store updated only during service mode; accessed at startup for sensor initialization.

Use Value: Maintains sensor accuracy over −40°C to +125°C ambient; 1M-cycle endurance supports recalibration during warranty service.

Body Control Module (BCM) Fault Log

Telematics Gateway Event History

Use Scenario: Recording diagnostic trouble codes (DTCs), timestamped fault events, and reset counters in BCM firmware.

IC Role / Device Role / Timing Role: Sequential-write log buffer with wraparound addressing; accessed via random read for DTC retrieval.

Use Value: Survives battery disconnect; 128-byte page writes minimize MCU intervention during fault capture bursts.

Use Scenario: Archiving GPS position snapshots, CAN bus error counts, and cellular connection status for remote diagnostics.

IC Role / Device Role / Timing Role: Persistent event recorder interfaced to microcontroller's I²C peripheral; updated asynchronously during network idle periods.

Use Value: Automotive-grade temp range ensures reliability in trunk-mounted gateways; hardware WP prevents overwrite during OTA updates.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT24C1024-SSHL-T	Same 1024 kbit density, 1.7V–5.5V V_CC, but rated only for industrial temp (−40°C to +85°C); no automotive qualification.	Not suitable for under-hood or infotainment modules requiring E-temp grade reliability.	Select only for cost-sensitive industrial control where automotive qualification is unnecessary.
BR24G1ME-3SPI	1024 kbit SPI interface (not I²C), 1.6V–5.5V, automotive grade; lacks hardware WP pin and cascading capability.	Requires SPI-capable MCU; incompatible with existing I²C bus topology and WP-based security schemes.	Choose only when migrating to SPI architecture and needing faster 10 MHz clock support.

Compared with AT24C1024-SSHL-T and BR24G1ME-3SPI, the 24LC1025T-E/SN16KVAO uniquely combines automotive temperature rating, I²C compatibility, hardware write-protection, and 4-device cascading-making it the only drop-in solution for legacy automotive I²C EEPROM designs requiring E-temp compliance.

Availability

24LC1025T-E/SN16KVAO is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS calibration modules, and body control units requiring stable component supply across extended product lifecycles.

Supply support for 24LC1025T-E/SN16KVAO 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 products for embedded control applications.

The 24LC1025 belongs to Microchip's serial EEPROM product line, engineered specifically for automotive and industrial systems demanding high reliability, wide voltage operation, and I²C bus compatibility in harsh environments.

FAQ

What is the maximum I²C clock frequency supported by the 24LC1025T-E/SN16KVAO?

The 24LC1025T-E/SN16KVAO supports up to 400 kHz at V_CC ≥ 4.5V in automotive temperature range. At V_CC < 4.5V, maximum clock drops to 100 kHz. This dual-speed capability ensures timing margin compliance across varying supply conditions in automotive electrical systems. The 24LC1025T-E/SN16KVAO does not support 1 MHz operation-that is reserved for the 24FC1025 variant.

How does the hardware write-protect (WP) pin function on the 24LC1025T-E/SN16KVAO?

The WP pin on the 24LC1025T-E/SN16KVAO is sampled only at the Stop condition of each write command. When tied to V_CC, it disables all write operations-including byte and page writes-while permitting unrestricted reads. When tied to V_SS, full read/write access is enabled. Toggling WP during a write cycle has no effect; protection state is latched at Stop.

Can multiple 24LC1025T-E/SN16KVAO devices share the same I²C bus?

Yes-up to four 24LC1025T-E/SN16KVAO devices can operate on a single I²C bus using A₀ and A₁ pins to configure unique 2-bit slave addresses (00–11). Each device must have A₂ hard-wired to V_CC. This allows scalable system memory expansion to 4 Mbit without additional buses or controllers.

What is the page size and write time for the 24LC1025T-E/SN16KVAO?

The 24LC1025T-E/SN16KVAO features a 128-byte page buffer. Page write time is 3 ms typical, with a maximum of 5 ms per byte or page. During this self-timed cycle, the device does not acknowledge I²C commands until completion-enabling ACK polling for precise host synchronization without fixed delays.

Is the 24LC1025T-E/SN16KVAO qualified for automotive applications?

Yes-the "E" suffix in 24LC1025T-E/SN16KVAO denotes Automotive grade, qualified for operation from −40°C to +125°C. It meets AEC-Q100 stress test requirements for reliability in automotive environments and is commonly deployed in infotainment, BCM, and telematics modules where extended temperature performance is mandatory.

24LC1025T-E/SN16KVAO 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:: 1Mbit

Memory Organization:: 128K 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:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

24LC1025T-E/SN16KVAO FAQ

1.How can I place an order for 24LC1025T-E/SN16KVAO through Aetrix?

Please submit a Request for Quotation (RFQ) for 24LC1025T-E/SN16KVAO 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 24LC1025T-E/SN16KVAO reliable?

The price and inventory of 24LC1025T-E/SN16KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC1025T-E/SN16KVAO is usually 5 days.

3.What payment methods are accepted for 24LC1025T-E/SN16KVAO?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC1025T-E/SN16KVAO transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 24LC1025T-E/SN16KVAO?

24LC1025T-E/SN16KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 24LC1025T-E/SN16KVAO 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 24LC1025T-E/SN16KVAO?

For technical support, including 24LC1025T-E/SN16KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC1025T-E/SN16KVAO requirements.

6.How does Aetrix verify that 24LC1025T-E/SN16KVAO is sourced from the original manufacturer or authorized distributors?

All 24LC1025T-E/SN16KVAO 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 24LC1025T-E/SN16KVAO meets industry standards.

7.What is the process for return or replacement of 24LC1025T-E/SN16KVAO?

All 24LC1025T-E/SN16KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 24LC1025T-E/SN16KVAO, 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 24LC1025T-E/SN16KVAO part is unused and in its original packaging.

Return procedure for 24LC1025T-E/SN16KVAO:

1.Submit a request within 90 days.

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

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