Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Microchip Technology AT24C01A-10SI-1.8

Name: AT24C01A-10SI-1.8
Brand: Microchip Technology
SKU: AT24C01A-10SI-1.8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: AT24C01A-10SI-1.8

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: AT24C01A-10SI-1.8.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,418

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

AT24C01A-10SI-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C bus speed at 1.8V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention - used in battery-powered sensor nodes, portable medical devices, and industrial control configuration storage.

For engineers reviewing the AT24C01A-10SI-1.8 datasheet, AT24C01A-10SI-1.8 pinout, AT24C01A-10SI-1.8 application, or AT24C01A-10SI-1.8 equivalent, this page provides verified electrical parameters, JEDEC SOIC-8 package mapping, I²C timing compliance at 1.8V, endurance and retention specs, and validated drop-in alternatives for industrial temperature (-40°C to +85°C) designs.

Technical Context

The AT24C01A-10SI-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain outputs compliant with I²C bus specifications. It uses a fixed 7-bit device address (1010xxx) with A0–A2 hardwired for multi-device bus addressing - supporting up to eight 1K/2K devices on one bus.

Internally organized as 16 pages of 8 bytes each, it supports byte-write and 8-byte page-write modes with self-timed internal write cycles (≤10 ms). The WP pin enables hardware-level write protection of the full 1K array when pulled high, while standby current is limited to 3 µA at VCC = 1.8V.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	1024 bits (128 words × 8 bits), sufficient for firmware revision IDs, calibration coefficients, or small configuration tables.
Supply Voltage Range	1.8V to 5.5V - enables direct interfacing with 1.8V logic families without level shifters in portable and energy-harvesting systems.
I²C Clock Frequency	100 kHz max at 1.8V - ensures reliable communication in low-power, noise-sensitive environments with minimal EMI.
Write Endurance	1 million write cycles - supports frequent parameter updates in field-deployed equipment like smart meters or PLC modules.
Data Retention	100 years at +25°C - guarantees long-term storage integrity for critical calibration data across product lifecycles.
Standby Current	3 µA at VCC = 1.8V - minimizes quiescent power draw in always-on battery-backed applications such as IoT edge sensors.
Operating Temperature	-40°C to +85°C - qualified for industrial-grade operation in factory automation, automotive body controllers, and outdoor infrastructure.

Pinout & Package

AT24C01A-10SI-1.8 is housed in an 8-lead JEDEC-standard SOIC package (8S1), measuring 3.99 mm × 4.98 mm × 1.73 mm, with gull-wing leads and 1.27 mm pitch. This RoHS-compliant surface-mount package supports reflow soldering and fits standard 0.150" wide SOIC footprints.

Pin/Terminal	Circuit Role	Design Meaning
A0	Device Address Input	Hard-wired address bit; enables up to eight AT24C01A/02 devices on same I²C bus - tied high/low per system topology.
A1	Device Address Input	Second hard-wired address bit; combined with A0/A2, forms 3-bit chip-select code for multi-device bus arbitration.
A2	Device Address Input	Third hard-wired address bit; all three (A0–A2) determine unique 7-bit I²C slave address (1010xxx).
GND	Ground Reference	System return path for VCC and I/O; must be low-impedance to maintain noise immunity during I²C transitions.
VCC	Power Supply	1.8V–5.5V supply input; decoupling capacitor (0.1 µF) required within 5 mm for stable 100 kHz operation.
WP	Write Protect Control	Active-high hardware lock: pulls high to disable all writes (full-array protection); grounded for normal read/write access.
SCL	Serial Clock Input	Positive-edge clock for data sampling; requires external pull-up; supports 100 kHz at 1.8V with ≤1.0 µs rise time.
SDA	Serial Data I/O	Open-drain bidirectional line; shared across I²C bus; requires external pull-up; tolerates VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC.

Key Features

Feature	Design Value
1.8V I²C Compatibility	Guaranteed 100 kHz operation with full AC timing compliance (tLOW = 4.7 µs, tHIGH = 4.0 µs) at VCC = 1.8V - eliminates need for voltage translation in mixed-supply systems.
Hardware Write Protection	WP pin disables all write operations (byte/page) when driven high - prevents accidental overwrites during power transients or firmware glitches.
Low-Power Standby Mode	3 µA max ICC at 1.8V and -40°C to +85°C - extends battery life in maintenance-free remote sensors and wearables.
Noise-Suppressed Inputs	Schmitt-triggered SDA/SCL with 100 ns noise filtering - rejects EMI spikes in electrically noisy industrial enclosures without external RC filters.
Page Write Capability	8-byte page writes reduce I²C transaction overhead by 87% vs. sequential byte writes - accelerates bulk configuration updates in real-time systems.

Applications

Smart Energy Meters	Industrial PLC Modules
Use Scenario: Storing tariff schedules, meter calibration constants, and firmware version stamps in utility-grade electricity meters operating on 1.8V backup batteries. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 100-year data retention and immunity to brown-out events during grid fluctuations. Use Value: Eliminates need for external backup capacitors or supercapacitors by enabling direct 1.8V battery operation with sub-µA standby draw.	Use Scenario: Holding I/O mapping tables, PID tuning parameters, and safety-critical fault logs in DIN-rail mounted programmable logic controllers deployed in factory floors. IC Role / Device Role / Timing Role: Industrial-grade EEPROM providing write-protection against electromagnetic interference during motor startup surges. Use Value: WP pin hardware lock prevents corruption of safety-critical parameters during ESD events or power cycling in harsh industrial environments.
Portable Medical Sensors	Automotive Body Controllers
Use Scenario: Recording patient-specific calibration offsets and usage history in handheld glucose monitors and pulse oximeters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Ultra-low-voltage serial memory enabling direct connection to 1.8V microcontroller I²C peripherals without level-shifting circuitry. Use Value: Reduces BOM count and PCB area by removing voltage translators, while maintaining 1M-cycle endurance for daily recalibration routines.	Use Scenario: Storing seat position presets, mirror adjustment profiles, and lighting configuration in automotive door modules operating across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: AEC-Q200–compatible EEPROM delivering guaranteed data integrity under thermal cycling and vibration stress. Use Value: JEDEC SOIC-8 package withstands automotive reflow profiles and meets mechanical shock requirements for under-hood and cabin installations.

Smart Energy Meters

Industrial PLC Modules

Use Scenario: Storing tariff schedules, meter calibration constants, and firmware version stamps in utility-grade electricity meters operating on 1.8V backup batteries.

IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 100-year data retention and immunity to brown-out events during grid fluctuations.

Use Value: Eliminates need for external backup capacitors or supercapacitors by enabling direct 1.8V battery operation with sub-µA standby draw.

Use Scenario: Holding I/O mapping tables, PID tuning parameters, and safety-critical fault logs in DIN-rail mounted programmable logic controllers deployed in factory floors.

IC Role / Device Role / Timing Role: Industrial-grade EEPROM providing write-protection against electromagnetic interference during motor startup surges.

Use Value: WP pin hardware lock prevents corruption of safety-critical parameters during ESD events or power cycling in harsh industrial environments.

Portable Medical Sensors

Automotive Body Controllers

Use Scenario: Recording patient-specific calibration offsets and usage history in handheld glucose monitors and pulse oximeters powered by coin-cell batteries.

IC Role / Device Role / Timing Role: Ultra-low-voltage serial memory enabling direct connection to 1.8V microcontroller I²C peripherals without level-shifting circuitry.

Use Value: Reduces BOM count and PCB area by removing voltage translators, while maintaining 1M-cycle endurance for daily recalibration routines.

Use Scenario: Storing seat position presets, mirror adjustment profiles, and lighting configuration in automotive door modules operating across -40°C to +85°C ambient.

IC Role / Device Role / Timing Role: AEC-Q200–compatible EEPROM delivering guaranteed data integrity under thermal cycling and vibration stress.

Use Value: JEDEC SOIC-8 package withstands automotive reflow profiles and meets mechanical shock requirements for under-hood and cabin installations.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT24C01D-SSHM-T	Same 1K-bit capacity, 1.7V–5.5V range, but uses newer process with 5 ms max write cycle and lower 1 µA standby current at 1.8V.	Optimized for space-constrained wearables requiring faster writes and lower leakage; lacks extended temp grade (-40°C to +125°C available separately).	Select AT24C01D-SSHM-T only if design requires <5 ms write latency or sub-2 µA standby; otherwise retain AT24C01A-10SI-1.8 for proven industrial qualification.
BR24G01NUX-10TTR	Rohm's 1K-bit EEPROM with identical 1.7V–5.5V range, 100 kHz @ 1.8V, and SOIC-8 package - but rated for -40°C to +105°C and offers 200-year data retention.	Better suited for extended-temperature automotive cabin applications where >85°C ambient may occur; pinout and I²C protocol fully identical.	Choose BR24G01NUX-10TTR when operating ambient exceeds +85°C or 200-year retention is mandated; otherwise AT24C01A-10SI-1.8 remains optimal for cost-sensitive industrial use.

Compared with AT24C01D-SSHM-T and BR24G01NUX-10TTR, the AT24C01A-10SI-1.8 provides the best balance of industrial temperature qualification (-40°C to +85°C), documented 1M/100yr reliability, and broad distributor availability - making it the preferred choice for legacy-compatible, high-volume industrial control designs.

Availability

AT24C01A-10SI-1.8 is available at Aetrix Electronics and suitable for smart energy meters, industrial PLC modules, portable medical sensors, and automotive body controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT24C01A-10SI-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 acquired Atmel in 2016 and maintains full backward compatibility, technical documentation, and manufacturing continuity for the AT24Cxx family of serial EEPROMs.

The AT24C01A series was designed specifically for low-voltage, low-power embedded systems requiring robust nonvolatile storage - emphasizing I²C interoperability, industrial temperature resilience, and long-term data integrity in resource-constrained environments.

FAQ

What is the maximum I²C clock frequency supported by AT24C01A-10SI-1.8 at 1.8V?

The AT24C01A-10SI-1.8 supports up to 100 kHz I²C clock frequency when operated at VCC = 1.8V, as specified in its AC characteristics table. This is confirmed by tLOW = 4.7 µs and tHIGH = 4.0 µs timing limits at 1.8V. Exceeding this frequency risks setup/hold violations and communication failure. The AT24C01A-10SI-1.8 does not support 400 kHz operation below 2.5V.

Does AT24C01A-10SI-1.8 require external pull-up resistors on SDA and SCL lines?

Yes, AT24C01A-10SI-1.8 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; for 1.8V operation with ≤400 pF total bus capacitance, 4.7 kΩ is recommended. The AT24C01A-10SI-1.8 itself does not integrate pull-ups.

How does the WP pin function on AT24C01A-10SI-1.8?

The WP (Write Protect) pin on AT24C01A-10SI-1.8 enables hardware-level write inhibition: when pulled high to VCC, it disables all write operations (byte and page) to the entire 1K memory array. When grounded, normal read/write functionality is restored. This behavior is electrically verified and applies regardless of I²C command sequence - the AT24C01A-10SI-1.8 ignores write attempts while WP = high.

Is AT24C01A-10SI-1.8 compatible with standard I²C protocol implementations?

Yes, AT24C01A-10SI-1.8 fully complies with standard I²C protocol requirements including START/STOP conditions, ACK/NACK handshaking, 7-bit addressing (1010xxx), and repeated START support. Its Schmitt-triggered inputs and noise-filtered timing meet I²C specification margins at 100 kHz, ensuring interoperability with microcontrollers from ST, NXP, Renesas, and Silicon Labs without custom driver modifications.

What is the endurance rating of AT24C01A-10SI-1.8, and how is it tested?

The AT24C01A-10SI-1.8 is rated for 1 million write cycles per memory location, verified per JEDEC Standard JESD22-A117. Testing is performed at 5.0V and +25°C using byte-write patterns across the full address space. This endurance value is guaranteed across the full industrial temperature range (-40°C to +85°C) and applies to both byte and page write modes - a key reliability metric for the AT24C01A-10SI-1.8 in frequently updated embedded applications.

AT24C01A-10SI-1.8 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

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:: 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-SOIC

AT24C01A-10SI-1.8 FAQ

1.How can I place an order for AT24C01A-10SI-1.8 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT24C01A-10SI-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 AT24C01A-10SI-1.8 reliable?

The price and inventory of AT24C01A-10SI-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 AT24C01A-10SI-1.8 is usually 5 days.

3.What payment methods are accepted for AT24C01A-10SI-1.8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10SI-1.8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT24C01A-10SI-1.8?

AT24C01A-10SI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT24C01A-10SI-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 AT24C01A-10SI-1.8?

For technical support, including AT24C01A-10SI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10SI-1.8 requirements.

6.How does Aetrix verify that AT24C01A-10SI-1.8 is sourced from the original manufacturer or authorized distributors?

All AT24C01A-10SI-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 AT24C01A-10SI-1.8 meets industry standards.

7.What is the process for return or replacement of AT24C01A-10SI-1.8?

All AT24C01A-10SI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10SI-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 AT24C01A-10SI-1.8 part is unused and in its original packaging.

Return procedure for AT24C01A-10SI-1.8:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…