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Microchip Technology AT24C01A-10SI-2.7-T
- Part No.:
- AT24C01A-10SI-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C01A-10SI-2.7-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,200
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Product details
Overview
AT24C01A-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 2.7V to 5.5V, supports 100 kHz I²C bus speed, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial sensor calibration storage and power-management configuration memory.
For engineers reviewing the AT24C01A-10SI-2.7-T datasheet, AT24C01A-10SI-2.7-T pinout, AT24C01A-10SI-2.7-T application, or AT24C01A-10SI-2.7-T equivalent, this page provides verified package mapping (8-lead SOIC), confirmed 7-bit device address behavior, validated page-write timing (8-byte pages), and real-world interoperability notes for microcontroller-based I²C subsystems.
Technical Context
The AT24C01A-10SI-2.7-T implements a two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-triggered inputs for noise immunity, and bi-directional data transfer protocol compliant with standard I²C timing. Its internal 128-word × 8-bit array is organized into 16 pages of 8 bytes each, requiring a 7-bit word address for random access.
Write protection is implemented via the dedicated WP pin: grounded for full read/write operation, tied to VCC to lock the entire 1K array. The device enters standby mode after STOP condition receipt and supports acknowledge polling to detect write-cycle completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8 organization), sufficient for small configuration tables or calibration coefficients |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V and 5V microcontrollers without level-shifting |
| I²C Clock Frequency | 100 kHz max - compatible with legacy and resource-constrained controllers; no 400 kHz support at 2.7V |
| Page Write Capacity | 8-byte page writes - reduces I²C transaction count when updating contiguous configuration blocks |
| Write Cycle Time | 10 ms maximum - defines minimum inter-write interval; impacts firmware timeout design |
| Data Retention | 100 years at +25°C - ensures long-term reliability in unattended industrial deployments |
| Endurance | 1 million write cycles - supports frequent recalibration or logging in field-upgradable devices |
Pinout & Package
AT24C01A-10SI-2.7-T is supplied in an 8-lead JEDEC SOIC package (package code 8S1), measuring 3.99 mm × 4.98 mm × 1.75 mm, with gull-wing leads and standard 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired address bit; enables up to eight AT24C01A devices on one I²C bus |
| A1 | Device Address Input | Second hard-wired address bit; used with A0 and A2 for unique 3-bit device addressing |
| A2 | Device Address Input | Third hard-wired address bit; all three bits (A2–A0) define the device's 7-bit I²C slave address |
| GND | Ground Reference | System ground return path; must be low-impedance to ensure noise-immune I²C signaling |
| VCC | Power Supply | Primary supply input; accepts 2.7V–5.5V; decoupling capacitor required per layout guidelines |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes to the full 1K memory array |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; requires external pull-up |
| SDA | Serial Data I/O | Open-drain bidirectional line; shared across I²C bus; requires external pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables robust operation in electrically noisy industrial environments by rejecting sub-threshold voltage transients on SCL/SDA |
| Hardware write protection | Prevents accidental overwrites during power-up/down or firmware glitches via dedicated WP pin |
| Partial page writes | Allows writing fewer than 8 bytes within a page without corrupting adjacent data - simplifies incremental updates |
| Self-timed write cycle | Eliminates need for precise firmware wait loops; completion signaled via ACK polling on I²C bus |
| Extended temperature range | -40°C to +85°C industrial grade operation - qualified for use in motor drives, PLC modules, and outdoor sensors |
Applications
| Industrial Sensor Calibration Storage | Embedded Power Management Configuration |
|---|---|
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 trim values accessed once at boot before ADC initialization. Use Value: Enables field-replaceable sensor modules without reprogramming host MCU firmware; retains values across power cycles and thermal stress. |
Use Scenario: Holding user-defined power-on defaults (voltage thresholds, fan speed profiles, watchdog timeouts) in AC/DC power supplies. IC Role / Device Role / Timing Role: Persistent settings store accessed during startup sequence to configure PMIC registers and enable safe power sequencing. Use Value: Supports customizable power behavior without modifying BOM or firmware; survives >100k power cycles with guaranteed 100-year retention. |
| Consumer Appliance UI State Memory | Medical Device Usage Log Buffer |
Use Scenario: Saving last-used cooking mode, timer value, and display brightness in smart ovens and microwaves. IC Role / Device Role / Timing Role: Low-power state keeper updated only on user interaction; accessed infrequently but must survive battery-backed standby. Use Value: Delivers consistent UX across unplanned outages; 1M endurance exceeds typical appliance lifetime (>15 years at 200 writes/year). |
Use Scenario: Recording cumulative operating hours, self-test results, and error counters in portable infusion pumps. IC Role / Device Role / Timing Role: Tamper-resistant event logger with WP pin permanently asserted during normal operation to prevent log deletion. Use Value: Meets IEC 62304 traceability requirements; 100-year retention ensures audit logs remain intact over device service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02A-10SI-2.7-T | 2K-bit capacity (256 × 8), same 8-lead SOIC package, identical 2.7V–5.5V supply and 100 kHz speed | Supports larger configuration sets; requires updated address pointer handling in firmware | Select when future firmware expansion or additional calibration parameters are anticipated |
| M24C01-RMN6TP | 1K-bit STMicroelectronics EEPROM; 100 kHz max at 2.7V; SOIC-8; -40°C to +85°C rating | Same memory size and package; different I²C address map (A0/A1/A2 pins function identically) | Drop-in replacement where pinout and timing match; verify WP pin behavior and ACK polling compatibility |
Compared with AT24C01A-10SI-2.7-T, the AT24C02A-10SI-2.7-T offers double memory without layout change, while M24C01-RMN6TP provides second-source assurance with identical functional scope but distinct manufacturer qualification data.
Availability
AT24C01A-10SI-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded power management configuration, and consumer appliance UI state memory requiring stable component supply across extended product lifecycles.
Supply support for AT24C01A-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24Cxx EEPROM family, delivering high-reliability nonvolatile memory solutions since 1980.
The AT24C01A belongs to Microchip's serial EEPROM product line, designed specifically for space-constrained, low-power embedded systems requiring robust, byte-addressable nonvolatile storage with I²C simplicity.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10SI-2.7-T?
The AT24C01A-10SI-2.7-T supports up to 100 kHz I²C clock frequency when operating within its 2.7V to 5.5V supply range. This is specified in the AC Characteristics table under fSCL for 2.7-/2.5-/1.8-volt operation. It does not support 400 kHz at 2.7V - that speed is only guaranteed for 5.0V operation, which this variant is not rated for.
How many devices can share the same I²C bus with AT24C01A-10SI-2.7-T?
Up to eight AT24C01A-10SI-2.7-T devices can coexist on a single I²C bus. This is enabled by the three hardware address pins (A0, A1, A2), each configurable as high or low to generate a unique 3-bit device address segment. The full 7-bit slave address is formed as 1010 + A2A1A0 + R/W, allowing 2³ = 8 distinct addresses.
Does AT24C01A-10SI-2.7-T support partial page writes?
Yes, AT24C01A-10SI-2.7-T supports partial page writes. Its 128 × 8 memory is divided into 16 pages of 8 bytes each, and firmware may write 1–8 bytes to any page without affecting unwritten bytes in that page. This avoids read-modify-write overhead and simplifies small-data updates like single-parameter configuration changes.
What happens when the WP pin is left floating on AT24C01A-10SI-2.7-T?
The WP pin on AT24C01A-10SI-2.7-T must not be left floating. Per the datasheet, WP is internally undefined in that state and may cause unpredictable write-enable behavior. For reliable operation, WP should be hard-wired to GND for full read/write access or to VCC to protect the entire 1K array. A pull-down or pull-up resistor is recommended if controlled dynamically.
Is AT24C01A-10SI-2.7-T qualified for automotive applications?
No, AT24C01A-10SI-2.7-T is rated for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While it meets extended temperature requirements, it lacks automotive-specific reliability testing (e.g., HTOL, ESD, vibration). For automotive use, Microchip offers the AT24C01C-10MI-2.7-T (AEC-Q100 Grade 3) as a qualified alternative.
AT24C01A-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:
- 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C01A-10SI-2.7-T FAQ
1.How can I place an order for AT24C01A-10SI-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-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 AT24C01A-10SI-2.7-T reliable?
The price and inventory of AT24C01A-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 AT24C01A-10SI-2.7-T is usually 5 days.
3.What payment methods are accepted for AT24C01A-10SI-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10SI-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10SI-2.7-T?
AT24C01A-10SI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-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 AT24C01A-10SI-2.7-T?
For technical support, including AT24C01A-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 AT24C01A-10SI-2.7-T requirements.
6.How does Aetrix verify that AT24C01A-10SI-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT24C01A-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 AT24C01A-10SI-2.7-T meets industry standards.
7.What is the process for return or replacement of AT24C01A-10SI-2.7-T?
All AT24C01A-10SI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-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 AT24C01A-10SI-2.7-T part is unused and in its original packaging.
Return procedure for AT24C01A-10SI-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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