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Microchip Technology AT24C01A-10SI
- Part No.:
- AT24C01A-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C01A-10SI.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,307
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Product details
Overview
AT24C01A-10SI from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) I²C-compatible serial EEPROM optimized for low-voltage industrial applications. It operates from 2.7V to 5.5V, supports 100 kHz I²C bus speed, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention in an 8-lead JEDEC SOIC package.
For engineers reviewing the AT24C01A-10SI datasheet, AT24C01A-10SI pinout, AT24C01A-10SI application, or AT24C01A-10SI equivalent, this page provides verified electrical specs, validated pin functions, industrial temperature range (-40°C to +85°C) operation details, and direct alternatives for system-level EEPROM replacement decisions.
Technical Context
The AT24C01A-10SI implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. It uses hard-wired A0–A2 address pins to support up to eight devices on a single bus and includes a dedicated Write Protect (WP) pin that enables full-array hardware lock when pulled high.
Internally organized as 16 pages of 8 bytes each, it supports byte-write and 8-byte page-write modes with self-timed 10 ms max write cycles. Its memory reset protocol-requiring up to nine clock pulses followed by a start condition-ensures reliable recovery after bus interruptions or power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8), sufficient for small configuration storage or calibration data in space-constrained designs |
| Supply Voltage Range | 2.7V to 5.5V - compatible with both 3.3V and 5V systems without level-shifting |
| I²C Clock Frequency | 100 kHz - ensures robust timing margins in electrically noisy industrial environments |
| Write Endurance | 1 million cycles - supports frequent firmware parameter updates over product lifetime |
| Data Retention | 100 years at +25°C - guarantees long-term nonvolatile storage without refresh |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded control and sensor modules |
| Standby Current | 1.6 µA max at 2.7V - enables ultra-low-power operation in battery-backed or energy-harvesting systems |
Pinout & Package
AT24C01A-10SI is housed in an 8-lead JEDEC-standard SOIC package (package code 8S1), measuring 4.9 mm × 3.9 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired address bit enabling up to eight AT24C01A-10SI devices on one I²C bus |
| A1 | Device Address Input | Second hard-wired address bit; combined with A0 and A2, defines unique 7-bit device address |
| A2 | Device Address Input | Third hard-wired address bit; all three (A0–A2) are used for 1K/2K family addressing |
| GND | Ground Reference | Return path for VCC and signal logic; must be low-impedance for stable I²C communication |
| VCC | Power Supply | Primary supply input (2.7V–5.5V); decoupling capacitor required near pin for noise immunity |
| WP | Write Protect Control | Hardware-enforced lock: tied to VCC to disable all writes, tied to GND for normal read/write access |
| SCL | I²C Clock Input | Open-drain input synchronized to master clock; requires external pull-up resistor (typically 4.7 kΩ) |
| SDA | I²C Data I/O | Bi-directional open-drain data line shared across multiple I²C devices; requires same pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 2.7V supply - eliminates need for voltage regulators in 3.3V microcontroller systems |
| Schmitt-trigger inputs | Enhanced noise immunity on SDA/SCL - prevents false clock/data transitions in EMI-prone industrial settings |
| Hardware write protection | WP pin enables irreversible lock of entire 1K array - critical for safeguarding bootloader or security keys |
| Page-write capability | 8-byte burst writes reduce I²C transaction overhead by 87% vs. sequential byte writes |
| Industrial temperature grade | Rated for -40°C to +85°C ambient - suitable for motor drives, PLCs, and outdoor metering equipment |
Applications
| Smart Energy Meters | Industrial PLC Modules |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in utility-grade electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage EEPROM interfaced via I²C to an ARM Cortex-M3 host MCU. Use Value: 100-year data retention ensures accurate billing history across meter lifetime without battery backup. | Use Scenario: Holding firmware update staging buffers and I/O mapping tables in modular programmable logic controllers. IC Role / Device Role / Timing Role: Serial EEPROM providing persistent storage for field-upgradable configuration data accessed during boot. Use Value: Hardware WP pin prevents accidental overwrite during hot-swap module insertion or firmware upload. |
| Medical Diagnostic Sensors | Automotive Body Control Units |
Use Scenario: Saving sensor offset/gain calibration coefficients and usage counters in portable ultrasound transducers. IC Role / Device Role / Timing Role: Low-power I²C EEPROM storing factory-trimmed analog front-end parameters for precision ADCs. Use Value: 1.6 µA standby current extends battery life in handheld diagnostic tools between recalibrations. | Use Scenario: Storing seat-position presets, mirror-angle profiles, and lighting configuration in vehicle door modules. IC Role / Device Role / Timing Role: Automotive-qualified serial EEPROM retaining user preferences across ignition cycles. Use Value: Industrial temperature rating ensures reliable operation in under-hood thermal environments up to +85°C. |
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 and SOIC-8 package, but rated for -40°C to +125°C and uses newer process node | Required for extended-temperature automotive cabin modules where ambient exceeds +85°C | Select when higher temperature margin or AEC-Q100 qualification is mandatory |
| M24C01-RMN6TP | 1K-bit I²C EEPROM in identical SOIC-8 package; supports 400 kHz bus speed and 1.7V–5.5V operation | Better suited for mixed-voltage systems needing 1.7V compatibility or faster write polling | Choose for broader voltage range or higher-speed I²C arbitration in multi-master systems |
Compared with AT24C01A-10SI, AT24C01D-SSHM-T offers extended temperature operation but lacks explicit industrial-grade screening documentation, while M24C01-RMN6TP provides lower minimum voltage and faster bus timing but requires validation of WP pin behavior in legacy designs.
Availability
AT24C01A-10SI is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical sensors, and automotive body electronics requiring stable component supply across long production lifecycles.
Supply support for AT24C01A-10SI 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, with broad industrial and automotive qualifications.
The AT24C01A-10SI belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring guaranteed data integrity and long-term reliability in harsh environments.
FAQ
What is the maximum I²C clock frequency supported by the AT24C01A-10SI?
The AT24C01A-10SI supports up to 100 kHz I²C clock frequency when operating within its 2.7V–5.5V supply range. This is specified in the AC Characteristics table under fSCL for the "2.7-, 2.5-, 1.8-volt" column. While higher-speed variants like the AT24C01A-10PU support 400 kHz, the AT24C01A-10SI is optimized for robustness in electrically noisy industrial settings where timing margins are prioritized over speed.
Does the AT24C01A-10SI require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C01A-10SI requires external pull-up resistors on both SDA and SCL lines because these pins are open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed requirements. The AT24C01A-10SI datasheet specifies that proper pull-up ensures valid logic levels and meets tR/tF rise/fall time requirements per I²C specification.
How does the Write Protect (WP) pin function on the AT24C01A-10SI?
On the AT24C01A-10SI, the WP pin enables hardware-level write protection: when pulled high to VCC, it locks the entire 1K-bit memory array against all write operations including byte and page writes; when tied to GND, full read/write functionality is restored. This behavior is confirmed in the Pin Description and WP Pin Status table, and applies regardless of I²C command sequence.
What is the endurance rating of the AT24C01A-10SI, and how is it tested?
The AT24C01A-10SI is rated for 1 million write cycles per memory location, as specified in the AC Characteristics table under "Endurance". This value is characterized at 5.0V and +25°C and reflects guaranteed minimum performance across the industrial temperature range. It is not 100% tested per unit but is validated through accelerated life testing per JEDEC standards.
Can the AT24C01A-10SI be used in place of the AT24C01A-10PI?
Yes, the AT24C01A-10SI can replace the AT24C01A-10PI in most designs because both are industrial-grade (–40°C to +85°C), share identical SOIC-8 packaging (8S1), and have matching 2.7V–5.5V operation and 100 kHz I²C speed. The suffix "SI" denotes SOIC packaging with industrial temperature range, while "PI" indicates PDIP packaging with same temperature rating - only PCB footprint differs.
AT24C01A-10SI 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C01A-10SI FAQ
1.How can I place an order for AT24C01A-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10SI 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 reliable?
The price and inventory of AT24C01A-10SI 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 is usually 5 days.
3.What payment methods are accepted for AT24C01A-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10SI?
AT24C01A-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10SI 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?
For technical support, including AT24C01A-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10SI requirements.
6.How does Aetrix verify that AT24C01A-10SI is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10SI 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 meets industry standards.
7.What is the process for return or replacement of AT24C01A-10SI?
All AT24C01A-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10SI, 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 part is unused and in its original packaging.
Return procedure for AT24C01A-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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