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

Microchip Technology AT24C04A-10TI-1.8

Name: AT24C04A-10TI-1.8
Brand: Microchip Technology
SKU: AT24C04A-10TI-1.8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C04A-10TI-1.8

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: AT24C04A-10TI-1.8.pdf

Description:: IC EEPROM 4KBIT I2C 8TSSOP

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Product details

Overview

AT24C04A-10TI-1.8 from Microchip Technology (formerly Atmel) is a 4-kbit I²C-compatible serial EEPROM organized as 512 × 8 bits, operating from 1.8V to 5.5V, featuring hardware write protection via the WP pin, 16-byte page write capability, and automotive-grade reliability with 1 million write cycles and 100-year data retention. It is used in industrial sensor calibration storage and automotive body control modules for nonvolatile parameter retention.

For engineers reviewing the AT24C04A-10TI-1.8 datasheet, AT24C04A-10TI-1.8 pinout, AT24C04A-10TI-1.8 application, or AT24C04A-10TI-1.8 equivalent, key selection considerations include its 1.8V minimum supply, TSSOP-8 package, 4K-bit density, WP-enabled hardware data protection, and compatibility with I²C bus systems requiring extended temperature operation (−40°C to +85°C).

Technical Context

The AT24C04A-10TI-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting clock rates up to 100 kHz at 1.8V and 400 kHz at ≥2.5V. Its internal address decoder uses A2 and A1 for hardwired device addressing (A0 is NC), enabling up to four 4K devices on one bus.

It features page-write architecture with 16-byte boundaries, self-timed 5 ms max write cycles, and acknowledge polling support. The WP pin enables hardware-level protection of the upper 2K-bit array when pulled high, while standby current is as low as 0.6 µA at 1.8V.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	4096 bits (512 × 8), enabling storage of firmware configuration or sensor calibration tables in space-constrained designs
Supply Voltage Range	1.8V to 5.5V - supports direct interfacing with 1.8V logic and mixed-voltage systems without level shifters
Interface	Two-wire I²C - compatible with standard microcontroller I²C peripherals and requires only two bidirectional pins
Page Write Size	16 bytes - reduces write transaction overhead versus byte writes, improving efficiency in burst data logging
Write Endurance	1 million cycles - suitable for applications requiring frequent parameter updates, such as adaptive control systems
Data Retention	100 years at +25°C - ensures long-term validity of stored calibration or security keys over product lifetime
Operating Temperature	−40°C to +85°C - qualified for automotive body electronics and industrial control environments
Package	8-lead TSSOP (8A2) - surface-mount, 4.4 mm body width, RoHS-compliant, suitable for automated PCB assembly

Pinout & Package

AT24C04A-10TI-1.8 is supplied in an 8-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.65 mm lead pitch and 4.4 mm body width. Pin 1 is marked by a beveled corner.

Pin/Terminal	Circuit Role	Design Meaning
A0	No-connect (NC)	Not internally connected; must be left unconnected per datasheet - omission prevents unintended device addressing
A1	Device Address Input	Hardwired to set second bit of 3-bit device address; enables up to four AT24C04A devices on same I²C bus
A2	Device Address Input	Hardwired to set most significant bit of device address; combined with A1, defines unique I²C slave address
GND	Ground Reference	Return path for VCC and signal currents; requires low-impedance connection to minimize noise coupling into SDA/SCL
VCC	Power Supply	Accepts 1.8–5.5V; decoupling capacitor (0.1 µF) required near pin to suppress I²C switching transients
WP	Write Protect Control	Pulled high to protect upper 2K-bit memory block from accidental writes; grounded for full read/write access
SCL	Serial Clock Input	Positive-edge sampled clock input; open-drain compatible, requires external pull-up resistor (typically 2.2–10 kΩ)
SDA	Serial Data I/O	Bidirectional open-drain data line; shared across multiple I²C devices; requires same pull-up as SCL

Key Features

Feature	Design Value
Hardware Write Protection	WP pin disables writes to upper 2K-bit memory segment when tied to VCC - eliminates software-only vulnerabilities in safety-critical firmware
Low-Voltage Operation	Functional down to 1.8V supply - enables direct integration with ultra-low-power MCUs (e.g., ARM Cortex-M0+) without voltage translation
Noise-Resilient Interface	Schmitt-trigger inputs and built-in noise filters on SDA/SCL - tolerate >100 ns glitches, reducing bus errors in electrically noisy automotive/industrial settings
Page Write Efficiency	16-byte page writes reduce I²C transaction count by up to 16× vs. byte writes - lowers CPU overhead and bus occupancy in data-logging applications
Automotive Qualification	Qualified per AEC-Q100 Grade 3 (−40°C to +85°C) with halogen-free, lead-free packaging - meets requirements for body electronics and infotainment subsystems

Applications

Industrial Sensor Calibration Storage	Automotive Body Control Module
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, and humidity sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization via I²C; no timing-critical interaction required. Use Value: Enables field-replaceable sensor modules with persistent calibration data, eliminating re-calibration after replacement and reducing maintenance downtime.	Use Scenario: Retaining user-configured settings (e.g., mirror position, seat memory, lighting profiles) across ignition cycles in vehicle door modules. IC Role / Device Role / Timing Role: I²C slave EEPROM providing persistent storage for 256+ bytes of user preference data; accessed asynchronously during wake-up sequences. Use Value: Supports seamless user experience with instant recall of preferences, leveraging 1.8V compatibility to interface directly with low-power domain MCUs.
Medical Device Configuration Backup	Smart Energy Meter Parameter Storage
Use Scenario: Saving operational thresholds and alarm limits in portable blood glucose monitors and infusion pumps after clinical setup. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store; WP pin used to lock critical parameters post-configuration. Use Value: Ensures regulatory compliance (IEC 62304) by preventing unauthorized runtime modification of safety-critical parameters.	Use Scenario: Holding tariff schedules, metering constants, and communication credentials in ANSI C12.19-compliant smart electricity meters. IC Role / Device Role / Timing Role: High-reliability data vault accessed during firmware updates and secure boot verification sequences. Use Value: Guarantees 100-year data integrity and 1M-cycle endurance - essential for 20+ year utility infrastructure deployments with infrequent but critical writes.

Industrial Sensor Calibration Storage

Automotive Body Control Module

Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, and humidity sensors in programmable logic controllers.

IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization via I²C; no timing-critical interaction required.

Use Value: Enables field-replaceable sensor modules with persistent calibration data, eliminating re-calibration after replacement and reducing maintenance downtime.

Use Scenario: Retaining user-configured settings (e.g., mirror position, seat memory, lighting profiles) across ignition cycles in vehicle door modules.

IC Role / Device Role / Timing Role: I²C slave EEPROM providing persistent storage for 256+ bytes of user preference data; accessed asynchronously during wake-up sequences.

Use Value: Supports seamless user experience with instant recall of preferences, leveraging 1.8V compatibility to interface directly with low-power domain MCUs.

Medical Device Configuration Backup

Smart Energy Meter Parameter Storage

Use Scenario: Saving operational thresholds and alarm limits in portable blood glucose monitors and infusion pumps after clinical setup.

IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store; WP pin used to lock critical parameters post-configuration.

Use Value: Ensures regulatory compliance (IEC 62304) by preventing unauthorized runtime modification of safety-critical parameters.

Use Scenario: Holding tariff schedules, metering constants, and communication credentials in ANSI C12.19-compliant smart electricity meters.

IC Role / Device Role / Timing Role: High-reliability data vault accessed during firmware updates and secure boot verification sequences.

Use Value: Guarantees 100-year data integrity and 1M-cycle endurance - essential for 20+ year utility infrastructure deployments with infrequent but critical writes.

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-bit density, 1.7–5.5V range, TSSOP-8, but lacks dedicated WP pin - write protection implemented via software lock bits only	Less robust against hardware-level fault injection; unsuitable where physical WP is mandated (e.g., ISO 26262 ASIL-B)	Select AT24C04A-10TI-1.8 when hardware write protection is required; choose M24C04-RMN6TP only if cost optimization outweighs WP need
ON Semiconductor CAT24C04HU4I-GT3	Identical 4K-bit organization, 1.7–5.5V, TSSOP-8, and WP pin, but rated for −40°C to +125°C and specified for 400 kHz at 1.7V (vs. 100 kHz for AT24C04A-10TI-1.8 at 1.8V)	Better suited for under-hood automotive applications requiring extended temperature range and higher-speed operation at lowest voltage	Choose CAT24C04HU4I-GT3 for engine bay use; retain AT24C04A-10TI-1.8 for cabin/body modules where −40°C to +85°C suffices

Compared with M24C04-RMN6TP and CAT24C04HU4I-GT3, the AT24C04A-10TI-1.8 provides verified hardware write protection and automotive-grade reliability at 1.8V operation, making it optimal for cost-sensitive body electronics where WP assurance and proven field performance are prioritized over extended temperature or sub-1.8V operation.

Availability

AT24C04A-10TI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical device configuration backup requiring stable component supply and long-term lifecycle support.

Supply support for AT24C04A-10TI-1.8 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 components, and memory solutions, with broad industrial and automotive qualification expertise.

The AT24C04A-10TI-1.8 belongs to Microchip's AT24Cxx family of I²C EEPROMs, designed specifically for reliable, low-voltage nonvolatile data storage in space-constrained, power-sensitive embedded systems.

FAQ

What is the minimum operating voltage for the AT24C04A-10TI-1.8?

The AT24C04A-10TI-1.8 operates down to 1.8V, as confirmed by its "−1.8" suffix and DC characteristics table specifying VCC1 = 1.8V min. This allows direct interfacing with 1.8V I/O domains without level-shifting circuitry. The device remains fully functional across the full 1.8V–5.5V range, with AC timing adjusted per voltage (e.g., 100 kHz max clock at 1.8V). AT24C04A-10TI-1.8 maintains all specifications-including write endurance and data retention-within this range.

Does the AT24C04A-10TI-1.8 have a hardware write protect pin?

Yes, the AT24C04A-10TI-1.8 includes a dedicated WP (Write Protect) pin that provides hardware-level protection for the upper 2K-bit memory block when pulled high to VCC. When WP is grounded, full read/write access is enabled. This feature is explicitly documented in the Features section and Table 2 (Write Protect), distinguishing it from software-only protection schemes. AT24C04A-10TI-1.8 leverages this pin to prevent accidental or malicious overwrites in safety-critical applications.

What package type is used for the AT24C04A-10TI-1.8?

The AT24C04A-10TI-1.8 is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package), identified as package code "8A2" per the Ordering Information table. Its dimensions conform to JEDEC MO-153, with a 4.4 mm body width, 0.65 mm lead pitch, and exposed pad-less construction. This surface-mount package supports automated assembly and offers better thermal performance than PDIP, making it ideal for compact industrial and automotive PCBs. AT24C04A-10TI-1.8 is not offered in SOIC or dBGA2 variants under this specific ordering code.

How many devices can share the same I²C bus with the AT24C04A-10TI-1.8?

Up to four AT24C04A-10TI-1.8 devices can be addressed on a single I²C bus using hardwired A2 and A1 pins; A0 is a no-connect. The device address format uses A2/A1 as the two most significant address bits (with P0 as a page bit), allowing unique 7-bit slave addresses (1010A2A1x). This is explicitly stated in the Device Addressing section and Figure 7. AT24C04A-10TI-1.8 does not support additional addressing beyond these four positions - unlike the AT24C02A variant, which uses A2/A1/A0 for eight-address capability.

What is the maximum write cycle time for the AT24C04A-10TI-1.8?

The maximum write cycle time for the AT24C04A-10TI-1.8 is 5 ms, as specified in Table 5 (AC Characteristics) under tWR. This self-timed internal operation begins after a valid STOP condition and completes before the device responds to subsequent I²C commands. During this period, the device ignores all bus activity - acknowledge polling must be used to detect completion. AT24C04A-10TI-1.8 guarantees this timing across its full operating temperature and voltage range, ensuring deterministic firmware wait-state implementation.

AT24C04A-10TI-1.8 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Tube

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:: 1.8V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-TSSOP

AT24C04A-10TI-1.8 FAQ

1.How can I place an order for AT24C04A-10TI-1.8 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C04A-10TI-1.8 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 AT24C04A-10TI-1.8 reliable?

The price and inventory of AT24C04A-10TI-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C04A-10TI-1.8 is usually 5 days.

3.What payment methods are accepted for AT24C04A-10TI-1.8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C04A-10TI-1.8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C04A-10TI-1.8?

AT24C04A-10TI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C04A-10TI-1.8 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 AT24C04A-10TI-1.8?

For technical support, including AT24C04A-10TI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C04A-10TI-1.8 requirements.

6.How does Aetrix verify that AT24C04A-10TI-1.8 is sourced from the original manufacturer or authorized distributors?

All AT24C04A-10TI-1.8 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 AT24C04A-10TI-1.8 meets industry standards.

7.What is the process for return or replacement of AT24C04A-10TI-1.8?

All AT24C04A-10TI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C04A-10TI-1.8, 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 AT24C04A-10TI-1.8 part is unused and in its original packaging.

Return procedure for AT24C04A-10TI-1.8:

1.Submit a request within 90 days.

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

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