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

Microchip Technology AT24C02A-10PU-1.8

Name: AT24C02A-10PU-1.8
Brand: Microchip Technology
SKU: AT24C02A-10PU-1.8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT24C02A-10PU-1.8

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: AT24C02A-10PU-1.8.pdf

Description:: IC EEPROM 2KBIT I2C 400KHZ 8DIP

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Product details

Overview

AT24C02A-10PU-1.8 from Microchip Technology (formerly Atmel) is a 2 Kbit I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It features 256 × 8-bit memory organization, 1.8 V to 5.5 V supply operation, hardware write protection via WP pin, and supports 100 kHz clock rate at 1.8 V. It is used in industrial sensor calibration storage and firmware parameter retention where extended data retention and automotive-grade reliability are required.

For engineers reviewing the AT24C02A-10PU-1.8 datasheet, AT24C02A-10PU-1.8 pinout, AT24C02A-10PU-1.8 application, or AT24C02A-10PU-1.8 equivalent, key selection criteria include 1.8 V minimum operating voltage, 8-byte page write capability, 1 million write endurance, 100-year data retention, and PDIP/SOIC/TSSOP/dBGA2 package compatibility with industrial temperature range (−40°C to +85°C).

Technical Context

The AT24C02A-10PU-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal address counter supports current-address, random-address, and sequential read modes, while the WP pin enables hardware-level protection of the upper half (1K) of memory when pulled high.

It uses an internally timed 5 ms max write cycle with acknowledge polling support, and supports partial page writes across its 32 pages of 8 bytes each. The device operates across −40°C to +85°C and meets RoHS-compliant, halogen-free green packaging requirements per the "U" suffix.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2048 bits (256 × 8), organized as 32 pages of 8 bytes - enables compact configuration storage without external address latches.
Supply Voltage Range	1.8 V to 5.5 V - supports direct interfacing with 1.8 V logic families and mixed-voltage systems.
I²C Clock Rate	100 kHz at 1.8 V - ensures reliable timing margin in ultra-low-power microcontroller applications.
Write Endurance	1,000,000 cycles - suitable for frequent recalibration or logging in field-deployed equipment.
Data Retention	100 years at +25°C - guarantees long-term integrity of stored calibration coefficients or security keys.
Operating Temperature	−40°C to +85°C - qualified for industrial and automotive under-hood environments.
Package Type	8-lead PDIP (8P3) - through-hole mounting compatible with legacy PCB assembly and prototyping.

Pinout & Package

AT24C02A-10PU-1.8 is supplied in an 8-pin Plastic Dual Inline Package (PDIP), 0.300" wide body (JEDEC MS-001 BA), with standard through-hole lead pitch and footprint.

Pin/Terminal	Circuit Role	Design Meaning
A0–A2	Device Address Inputs	Hardwired address bits enabling up to eight AT24C02A devices on one I²C bus; A0–A2 determine 3-bit slave address prefix.
SDA	Serial Data Line	Bidirectional open-drain I²C data line requiring external pull-up; supports multi-master arbitration and wire-OR connection.
SCL	Serial Clock Input	Input-only I²C clock line synchronized to master; edge-triggered for data sampling and transfer control.
WP	Write Protect Control	Hardware-enforced lock: tied to VCC disables writes to upper 1K memory; tied to GND enables full read/write access.
GND	Ground Reference	Primary return path for all internal circuitry and I/O signals; must be low-impedance for noise immunity.
VCC	Power Supply	Single-supply input supporting 1.8–5.5 V; powers EEPROM core, interface logic, and internal charge pump for write operations.

Key Features

Feature	Design Value
1.8 V Low-Voltage Operation	Enables direct integration with 1.8 V microcontrollers and battery-powered IoT nodes without level-shifting.
Hardware Write Protection (WP)	Prevents accidental overwrites of critical calibration or security data during power-up/down or firmware glitches.
8-Byte Page Write Mode	Reduces I²C transaction overhead by writing up to 8 bytes per stop condition - improves system-level write throughput.
Schmitt-Trigger & Noise Filtering	Ensures robust I²C communication in electrically noisy industrial enclosures with >100 ns noise suppression.
Automotive-Grade Qualification	Validated for extended temperature and humidity stress; supports use in non-safety-critical vehicle subsystems.

Applications

Industrial Sensor Calibration	Embedded Firmware Parameter Storage
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent trim values accessed at boot time via I²C. Use Value: Eliminates need for external trimming components and enables field recalibration without hardware modification.	Use Scenario: Retaining user-configurable settings (e.g., display brightness, network timeout) across power cycles in smart HVAC controllers. IC Role / Device Role / Timing Role: Dedicated parameter EEPROM interfaced to MCU's I²C peripheral during initialization and runtime updates. Use Value: Provides deterministic, low-latency access to 256-byte configuration space with guaranteed 100-year data retention.
Power Meter Energy Registers	Medical Device Usage Logs
Use Scenario: Recording cumulative kWh consumption and tariff-switching timestamps in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: Tamper-resistant data logger storing time-stamped energy totals using WP-protected memory regions. Use Value: Meets utility-grade accuracy requirements with 1M write endurance and immunity to brownout-induced corruption.	Use Scenario: Capturing device usage history, error codes, and calibration audit trails in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory for FDA-required traceability data with write-cycle limiting. Use Value: Supports regulatory compliance via guaranteed 100-year retention and hardware write-lock for audit logs.

Industrial Sensor Calibration

Embedded Firmware Parameter Storage

Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers.

IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent trim values accessed at boot time via I²C.

Use Value: Eliminates need for external trimming components and enables field recalibration without hardware modification.

Use Scenario: Retaining user-configurable settings (e.g., display brightness, network timeout) across power cycles in smart HVAC controllers.

IC Role / Device Role / Timing Role: Dedicated parameter EEPROM interfaced to MCU's I²C peripheral during initialization and runtime updates.

Use Value: Provides deterministic, low-latency access to 256-byte configuration space with guaranteed 100-year data retention.

Power Meter Energy Registers

Medical Device Usage Logs

Use Scenario: Recording cumulative kWh consumption and tariff-switching timestamps in ANSI C12.20-compliant electricity meters.

IC Role / Device Role / Timing Role: Tamper-resistant data logger storing time-stamped energy totals using WP-protected memory regions.

Use Value: Meets utility-grade accuracy requirements with 1M write endurance and immunity to brownout-induced corruption.

Use Scenario: Capturing device usage history, error codes, and calibration audit trails in portable diagnostic instruments.

IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory for FDA-required traceability data with write-cycle limiting.

Use Value: Supports regulatory compliance via guaranteed 100-year retention and hardware write-lock for audit logs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
M24C02-RMN6TP	2 Kbit, 1.7–5.5 V, 400 kHz @ 2.5 V+, SO8 package only - no PDIP option; lower standby current (1 µA @ 1.8 V).	Preferred for space-constrained PCBs using SOIC; unsuitable for through-hole prototyping or legacy DIP layouts.	Select when board area is constrained and SOIC is acceptable; verify WP functionality matches system-level protection needs.
BR24G02NUX-10	2 Kbit, 1.6–5.5 V, 1 MHz I²C, 8-ball DFN (Y5) - smaller footprint than PDIP; higher speed but no 100 kHz guarantee at 1.8 V.	Targeted at high-density consumer electronics; lacks automotive qualification and 100-year retention spec.	Choose for cost-sensitive, high-volume consumer designs where extended retention and industrial temp are not required.

Compared with M24C02-RMN6TP and BR24G02NUX-10, AT24C02A-10PU-1.8 uniquely combines PDIP package availability, guaranteed 100 kHz operation at 1.8 V, automotive-grade qualification, and explicit 100-year data retention - making it optimal for industrial field equipment requiring long-term reliability and legacy-compatible assembly.

Availability

AT24C02A-10PU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded firmware parameter storage, and power meter energy registers requiring stable component supply across extended product lifecycles.

Supply support for AT24C02A-10PU-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 devices, and nonvolatile memory solutions for industrial, automotive, and communications markets.

The AT24C02A-10PU-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-voltage, high-reliability configuration and calibration storage in resource-constrained embedded systems.

FAQ

What is the minimum operating voltage for the AT24C02A-10PU-1.8?

The AT24C02A-10PU-1.8 operates down to 1.8 V, as confirmed by its "−1.8" suffix and DC characteristics table specifying VCC1 = 1.8 V minimum. This allows direct interface with 1.8 V I/O domains without level shifters. The device maintains full 100 kHz I²C functionality and guaranteed write timing at this voltage. AT24C02A-10PU-1.8 is not rated for sub-1.8 V operation, and attempting to power it below that threshold may result in undefined behavior or data corruption.

Does the AT24C02A-10PU-1.8 support page writes, and what is the page size?

Yes, the AT24C02A-10PU-1.8 supports page writes with a fixed page size of 8 bytes, as stated in the Memory Organization section and Table 2. It organizes its 256-word array into 32 pages of 8 bytes each. Partial page writes are allowed, and the internal address counter wraps within the same page boundary. This capability reduces I²C transaction count when updating contiguous configuration data. AT24C02A-10PU-1.8 does not support larger page sizes - unlike the 4K AT24C04A variant, which uses 16-byte pages.

How does the Write Protect (WP) pin function on the AT24C02A-10PU-1.8?

On the AT24C02A-10PU-1.8, the WP pin provides hardware-level write protection: when pulled high to VCC, it locks the upper half (1024 bits) of memory against writes while allowing full read access; when grounded, normal read/write operations are enabled across the entire array. This behavior is distinct from earlier AT24C02 versions and is explicitly documented in Table 2. AT24C02A-10PU-1.8 does not support byte-level or software-based write protection - WP is the sole hardware mechanism for safeguarding critical data.

What package type is used for the AT24C02A-10PU-1.8, and is it RoHS-compliant?

The AT24C02A-10PU-1.8 uses an 8-lead PDIP (Plastic Dual Inline Package), designated as 8P3 per the ordering information table. The "U" suffix confirms it is lead-free, halogen-free, and RoHS-compliant per EU Directive 2011/65/EU. Its dimensions conform to JEDEC MS-001 BA standard, with 0.300" body width and 0.100" lead pitch. AT24C02A-10PU-1.8 is not offered in SOIC, TSSOP, or dBGA2 variants under this exact part number - those require different suffixes (e.g., -SU, -TU, -UU).

What is the maximum write cycle time for the AT24C02A-10PU-1.8, and how is completion detected?

The maximum write cycle time for the AT24C02A-10PU-1.8 is 5 ms, as specified in Table 5 (tWR). Completion is detected via acknowledge polling: after issuing a write command and stop condition, the host sends a repeated start followed by the device address with R/W = 0; the AT24C02A-10PU-1.8 responds with an ACK only after the internal write completes. This method avoids fixed delays and adapts to process/voltage variations. AT24C02A-10PU-1.8 does not support ready/busy pin signaling - polling is the sole standardized detection mechanism.

AT24C02A-10PU-1.8 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 2Kbit

Memory Organization:: 256 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:: Through Hole

Supplier Device Package:: 8-PDIP

AT24C02A-10PU-1.8 FAQ

1.How can I place an order for AT24C02A-10PU-1.8 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C02A-10PU-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 AT24C02A-10PU-1.8 reliable?

The price and inventory of AT24C02A-10PU-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 AT24C02A-10PU-1.8 is usually 5 days.

3.What payment methods are accepted for AT24C02A-10PU-1.8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C02A-10PU-1.8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C02A-10PU-1.8?

AT24C02A-10PU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C02A-10PU-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 AT24C02A-10PU-1.8?

For technical support, including AT24C02A-10PU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C02A-10PU-1.8 requirements.

6.How does Aetrix verify that AT24C02A-10PU-1.8 is sourced from the original manufacturer or authorized distributors?

All AT24C02A-10PU-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 AT24C02A-10PU-1.8 meets industry standards.

7.What is the process for return or replacement of AT24C02A-10PU-1.8?

All AT24C02A-10PU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C02A-10PU-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 AT24C02A-10PU-1.8 part is unused and in its original packaging.

Return procedure for AT24C02A-10PU-1.8:

1.Submit a request within 90 days.

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

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