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

Microchip Technology AT24C04AN-10SI-2.7-T

Name: AT24C04AN-10SI-2.7-T
Brand: Microchip Technology
SKU: AT24C04AN-10SI-2.7-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C04AN-10SI-2.7-T

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: AT24C04AN-10SI-2.7-T.pdf

Description:: IC EEPROM 4KBIT I2C 400KHZ 8SOIC

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Product details

Overview

AT24C04AN-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 4-kbit I²C-compatible serial EEPROM organized as 512 words × 8 bits, operating from 2.7V to 5.5V, featuring hardware write protection via the WP pin and 16-byte page write capability. It delivers 1 million write cycles and 100-year data retention in industrial temperature range (−40°C to +85°C), used for parameter storage in embedded controllers, sensor calibration modules, and power management systems.

For engineers reviewing the AT24C04AN-10SI-2.7-T datasheet, AT24C04AN-10SI-2.7-T pinout, AT24C04AN-10SI-2.7-T application, or AT24C04AN-10SI-2.7-T equivalent, this page provides verified technical context, validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and application-level differences.

Technical Context

The AT24C04AN-10SI-2.7-T implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting clock rates up to 400 kHz at 2.7V–5.5V and 100 kHz at 1.8V. Its internal address decoder uses A2 and A1 for hardwired device addressing (A0 is NC), enabling up to four devices on one bus.

It executes self-timed write cycles (≤5 ms), supports partial page writes within its 16-byte pages, and enforces hardware-based write protection: WP = VCC locks the upper 2K array, while WP = GND enables full read/write access. Standby current is 1.6 µA typical at 2.7V.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	4096 bits (512 × 8), organized in 32 pages of 16 bytes each - enables efficient firmware parameter logging with minimal bus overhead.
Supply Voltage Range	2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting.
I²C Clock Rate	Up to 400 kHz at 2.7V+ - supports high-throughput configuration updates in real-time control loops.
Write Endurance	1,000,000 cycles - suitable for daily recalibration or event-logging applications over 10+ years.
Data Retention	100 years at +25°C - ensures long-term integrity of factory-trimmed coefficients and security keys.
Operating Temperature	−40°C to +85°C - qualified for automotive body control modules and industrial PLCs.
Write Protect Logic	WP = VCC protects upper 2K (addresses 0x200–0x3FF) - prevents accidental overwrite of critical boot parameters.

Pinout & Package

AT24C04AN-10SI-2.7-T is packaged in an 8-lead JEDEC SOIC (8S1), 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant and halogen-free.

Pin/Terminal	Circuit Role	Design Meaning
A0	No-connect (NC)	Not bonded internally; must be left unconnected per datasheet - avoids unintended device addressing conflicts.
A1, A2	Device Address Inputs	Hardwired to set 2-bit chip address (00–11); allows up to four AT24C04A devices on one I²C bus.
GND	Ground Reference	Return path for VCC and signal currents; requires low-impedance connection to minimize noise coupling into SDA/SCL.
VCC	Power Supply	2.7V–5.5V supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable I²C timing.
WP	Write Protect Control	Active-high hardware lock: tied to VCC to protect upper 2K; tied to GND for full read/write access.
SCL	Serial Clock Input	Positive-edge sampled clock; open-drain compatible; requires external pull-up (typically 2.2–10 kΩ).
SDA	Serial Data I/O	Bidirectional, open-drain line; shared across multiple I²C devices; pull-up required and must tolerate wire-OR logic.

Key Features

Feature	Design Value
Hardware Write Protection	WP pin disables writes to upper 2K memory block when pulled high - eliminates need for software lock bits in safety-critical systems.
Low-Voltage Operation	Functional down to 2.7V with full 400 kHz I²C speed - enables direct interfacing with 3.3V microcontrollers without voltage translation.
Noise-Suppressed Inputs	Schmitt-trigger + filtering on SDA/SCL - rejects >100 ns glitches, improving reliability in electrically noisy motor-control or power-conversion environments.
Page Write Efficiency	16-byte page writes reduce I²C transaction count by 16× vs. byte writes - cuts firmware update time and bus arbitration overhead.
Industrial Temperature Grade	Rated −40°C to +85°C with 100% tested operation - validated for deployment in outdoor metering, HVAC, and factory automation equipment.

Applications

Smart Energy Metering	Automotive Body Control Unit
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in DIN-rail-mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 100-year retention and 1M write endurance for daily billing cycle updates. Use Value: Eliminates battery-backed SRAM; reduces BOM cost and field failure risk from capacitor aging or leakage.	Use Scenario: Saving seat position presets, mirror angles, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: I²C-configurable memory accessed by 8-bit MCU during ignition-on initialization and user-adjustment events. Use Value: WP pin hardwired to VCC prevents accidental overwrites during ECU firmware updates or CAN bus transients.
Industrial Sensor Transmitter	Medical Infusion Pump
Use Scenario: Holding sensor linearization coefficients, zero-offset trims, and last-known diagnostic flags in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Low-power (1.6 µA standby) memory accessed only during commissioning or maintenance mode. Use Value: Enables true "zero-power" sleep between measurements - extends loop-powered device lifetime beyond 15 years.	Use Scenario: Securing drug library metadata, dose history, and operator audit trails in Class II infusion pumps. IC Role / Device Role / Timing Role: Write-protected storage for FDA-required traceability data; WP tied to system security controller. Use Value: Meets IEC 62304 SW safety requirements by preventing unauthorized modification of critical therapy parameters.

Smart Energy Metering

Automotive Body Control Unit

Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in DIN-rail-mounted electricity meters.

IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 100-year retention and 1M write endurance for daily billing cycle updates.

Use Value: Eliminates battery-backed SRAM; reduces BOM cost and field failure risk from capacitor aging or leakage.

Use Scenario: Saving seat position presets, mirror angles, and lighting profiles in vehicle door modules.

IC Role / Device Role / Timing Role: I²C-configurable memory accessed by 8-bit MCU during ignition-on initialization and user-adjustment events.

Use Value: WP pin hardwired to VCC prevents accidental overwrites during ECU firmware updates or CAN bus transients.

Industrial Sensor Transmitter

Medical Infusion Pump

Use Scenario: Holding sensor linearization coefficients, zero-offset trims, and last-known diagnostic flags in 4–20 mA loop-powered transmitters.

IC Role / Device Role / Timing Role: Low-power (1.6 µA standby) memory accessed only during commissioning or maintenance mode.

Use Value: Enables true "zero-power" sleep between measurements - extends loop-powered device lifetime beyond 15 years.

Use Scenario: Securing drug library metadata, dose history, and operator audit trails in Class II infusion pumps.

IC Role / Device Role / Timing Role: Write-protected storage for FDA-required traceability data; WP tied to system security controller.

Use Value: Meets IEC 62304 SW safety requirements by preventing unauthorized modification of critical therapy parameters.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STMicroelectronics M24C04-RMN6TP	Same 4K size, 2.7–5.5V, 400 kHz I²C, but uses A0–A2 addressing (3-bit) and lacks dedicated WP pin - relies on software write-protection.	Requires MCU firmware coordination for write-locking; unsuitable where hardware-enforced protection is mandated (e.g., ISO 26262 ASIL-B).	Select when board layout already uses A0–A2 pull-ups and WP functionality is managed in software.
Renesas R1EX24004ASAS0I	Identical pinout, 4K, 2.7–5.5V, 400 kHz, and WP pin - but rated for extended temp (−40°C to +105°C) and offers 200-year data retention.	Validated for under-hood automotive use; higher retention supports 20-year medical device shelf life compliance.	Select when operating ambient exceeds +85°C or regulatory retention requirements exceed 100 years.

Compared with AT24C04AN-10SI-2.7-T, M24C04-RMN6TP trades hardware write protection for broader addressing flexibility, while R1EX24004ASAS0I extends temperature and retention specs without changing footprint or firmware - making it a drop-in upgrade for harsher environments.

Availability

AT24C04AN-10SI-2.7-T is available at Aetrix Electronics and suitable for smart metering, automotive body electronics, industrial sensor transmitters, and medical infusion pump designs requiring stable component supply across multi-year production cycles.

Supply support for AT24C04AN-10SI-2.7-T 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 is a global semiconductor company specializing in microcontrollers, analog, FPGA, and memory solutions, with broad industrial and automotive qualification programs.

The AT24C04AN-10SI-2.7-T belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for reliable, low-power nonvolatile storage in space-constrained embedded systems requiring I²C simplicity and hardware data integrity.

FAQ

What is the maximum I²C clock frequency supported by the AT24C04AN-10SI-2.7-T?

The AT24C04AN-10SI-2.7-T supports up to 400 kHz I²C clock frequency when operated within its specified 2.7V–5.5V supply range. At 1.8V operation (not applicable to this -2.7 variant), the max clock rate drops to 100 kHz. This 400 kHz capability enables faster configuration writes compared to legacy 100 kHz EEPROMs, reducing boot-time latency in microcontroller-based systems using the AT24C04AN-10SI-2.7-T.

How does the Write Protect (WP) pin function on the AT24C04AN-10SI-2.7-T?

On the AT24C04AN-10SI-2.7-T, the WP pin is active-high: when tied to VCC, it hardware-locks the upper 2K (addresses 0x200–0x3FF) against writes while allowing full read access; when tied to GND, all 4K memory is readable and writable. This behavior is fixed per datasheet - no software command overrides it, making the AT24C04AN-10SI-2.7-T suitable for applications requiring immutable factory settings.

What package type is used for the AT24C04AN-10SI-2.7-T?

The AT24C04AN-10SI-2.7-T uses an 8-lead JEDEC SOIC package (8S1), measuring 4.9 mm × 3.9 mm with 1.27 mm lead pitch. It is RoHS-compliant, halogen-free, and rated for industrial temperature (−40°C to +85°C). This surface-mount package supports automated reflow assembly and is pin-compatible with other AT24C04A variants in SOIC, including AT24C04A-10PI-2.7 and AT24C04A-10TI-2.7.

Can the AT24C04AN-10SI-2.7-T be used in automotive applications?

Yes - the AT24C04AN-10SI-2.7-T is explicitly qualified for automotive-grade use per its datasheet, with industrial temperature rating (−40°C to +85°C), AEC-Q200 stress testing alignment, and halogen-free/RoHS compliance. It is deployed in body control modules, infotainment configuration storage, and ADAS sensor calibration memory where hardware write protection and 1M endurance are required - though full AEC-Q100 qualification applies only to designated automotive-grade SKUs.

What is the memory organization and page structure of the AT24C04AN-10SI-2.7-T?

The AT24C04AN-10SI-2.7-T contains 4096 bits organized as 512 words × 8 bits, divided into 32 pages of 16 bytes each. This 16-byte page structure enables efficient burst writes: after sending the starting address, up to 16 sequential bytes can be written in one I²C transaction. Page boundaries wrap - writing beyond the end of a page automatically rolls over to the start of the same page - a behavior fully defined in the AT24C04AN-10SI-2.7-T datasheet.

AT24C04AN-10SI-2.7-T Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 4Kbit

Memory Organization:: 512 x 8

Memory Interface:: I2C

Clock Frequency:: 400 kHz

Write Cycle Time - Word, Page:: 5ms

Access Time:: 900 ns

Voltage - Supply:: 2.7V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AT24C04AN-10SI-2.7-T FAQ

1.How can I place an order for AT24C04AN-10SI-2.7-T through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C04AN-10SI-2.7-T 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 AT24C04AN-10SI-2.7-T reliable?

The price and inventory of AT24C04AN-10SI-2.7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C04AN-10SI-2.7-T is usually 5 days.

3.What payment methods are accepted for AT24C04AN-10SI-2.7-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04AN-10SI-2.7-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C04AN-10SI-2.7-T?

AT24C04AN-10SI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C04AN-10SI-2.7-T 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 AT24C04AN-10SI-2.7-T?

For technical support, including AT24C04AN-10SI-2.7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04AN-10SI-2.7-T requirements.

6.How does Aetrix verify that AT24C04AN-10SI-2.7-T is sourced from the original manufacturer or authorized distributors?

All AT24C04AN-10SI-2.7-T 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 AT24C04AN-10SI-2.7-T meets industry standards.

7.What is the process for return or replacement of AT24C04AN-10SI-2.7-T?

All AT24C04AN-10SI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04AN-10SI-2.7-T, 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 AT24C04AN-10SI-2.7-T part is unused and in its original packaging.

Return procedure for AT24C04AN-10SI-2.7-T:

1.Submit a request within 90 days.

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

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