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Microchip Technology AT24C01A-10PC
- Part No.:
- AT24C01A-10PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C01A-10PC.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,165
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Product details
Overview
AT24C01A-10PC from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) two-wire serial EEPROM with 2.7V to 5.5V supply operation, 100 kHz I²C-compatible interface, hardware write protection via WP pin, and 1 million write cycles endurance. It serves as nonvolatile configuration storage in microcontroller-based systems requiring low-power, space-constrained data retention.
For engineers reviewing the AT24C01A-10PC datasheet, AT24C01A-10PC pinout, AT24C01A-10PC application, or AT24C01A-10PC equivalent, key selection criteria include its 8-pin PDIP package, 10 ms max write cycle time, Schmitt-triggered inputs for noise immunity, page-write capability (8-byte pages), and compatibility with standard I²C bus timing at 100 kHz under 2.7V–5.5V operation.
Technical Context
The AT24C01A-10PC implements a fixed 7-bit I²C device address with hardwired A0–A2 pins enabling up to eight devices on a single bus. Its memory is organized into 16 pages of 8 bytes each, supporting both byte-write and page-write modes with automatic address incrementing within page boundaries.
It uses open-drain SDA/SCL interfaces compliant with I²C protocol timing, including START/STOP detection, ACK polling during write cycles, and current-address/random/sequential read modes. The WP pin provides hardware-level write lock for the full 1K array when pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits); supports system configuration storage without external address latches. |
| 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 maximum; ensures reliable communication in electrically noisy industrial environments. |
| Write Cycle Time | 10 ms maximum; defines minimum interval between successive writes and impacts firmware timeout design. |
| Endurance | 1 million write cycles; supports frequent calibration or logging updates over product lifetime. |
| Data Retention | 100 years at +25°C; guarantees long-term integrity of stored settings without battery backup. |
| Operating Temperature | 0°C to +70°C (Commercial grade); validated for use in consumer and office equipment applications. |
Pinout & Package
AT24C01A-10PC is supplied in an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, with JEDEC-standard footprint and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | Device Address Input | Hardwired address bit; enables multi-device I²C bus addressing (A0–A2 define 3-bit device ID). |
| 2 (A1) | Device Address Input | Second hardwired address bit; allows up to eight AT24C01A-10PC devices on one I²C bus. |
| 3 (A2) | Device Address Input | Third hardwired address bit; used with A0/A1 to configure unique 7-bit I²C slave address. |
| 4 (GND) | Ground Reference | System common return path; must be low-impedance to ensure stable logic thresholds and noise immunity. |
| 5 (VCC) | Power Supply | Primary power input (2.7–5.5V); decoupling capacitor required near pin to suppress switching transients. |
| 6 (WP) | Write Protect Control | Hardware lock: tied to VCC to disable all writes; tied to GND for normal read/write operation. |
| 7 (SCL) | Serial Clock Input | Master-generated clock signal; open-drain requires external pull-up; controls data sampling timing. |
| 8 (SDA) | Serial Data I/O | Bi-directional open-drain bus line; shared across multiple I²C devices; requires external pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-triggered inputs | Enables robust operation in noisy environments by rejecting sub-threshold voltage fluctuations on SCL/SDA. |
| 8-byte page write mode | Reduces firmware overhead by allowing up to 8 sequential bytes to be written per I²C transaction. |
| Self-timed internal write cycle | Eliminates need for precise software timing control; host can poll ACK to detect write completion. |
| Write protect (WP) pin | Provides hardware-enforced data integrity-no firmware intervention needed to prevent accidental writes. |
| Low standby current (1.6 µA @ 2.7V) | Minimizes power draw in always-on systems such as smart meters or IoT edge nodes during idle periods. |
Applications
| Smart Home Thermostat | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Stores user-set temperature profiles, calibration offsets, and schedule preferences across power cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to an 8-bit MCU via I²C at 100 kHz. Use Value: Enables field-updatable settings without battery-backed SRAM; 1M endurance supports daily recalibration over 27 years. |
Use Scenario: Retains module identification, channel mapping, and fault history in distributed I/O racks. IC Role / Device Role / Timing Role: Serial EEPROM providing persistent parameter storage for real-time control firmware. Use Value: WP pin prevents runtime corruption during hot-swap events; 2.7V operation ensures compatibility with 3.3V backplane logic. |
| POS Terminal Firmware Patch Storage | Medical Infusion Pump Calibration Data |
|
Use Scenario: Holds minor firmware patches and localization strings updated remotely via secure bootloader. IC Role / Device Role / Timing Role: Secondary code/data storage supplementing main flash, accessed only during update sequences. Use Value: 100-year data retention meets regulatory requirements for long-lifecycle retail hardware deployments. |
Use Scenario: Stores factory-calibrated flow rate coefficients and safety-critical operational limits. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with hardware write lock enabled during normal operation. Use Value: WP pin tied to VCC ensures calibration data cannot be altered by software faults or malware. |
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 capacity and 2.7–5.5V range but in 8-lead SOIC package; higher ICC (3 mA vs. 2 mA) during write. | SOIC footprint requires PCB redesign; better thermal performance in reflow-soldered assemblies. | Select if automated assembly and board space constraints favor surface-mount over through-hole PDIP. |
| STMicroelectronics M24C01-RMN6TP | 1K I²C EEPROM in TSSOP8; identical 2.7–5.5V range and 100 kHz speed, but 400 kHz capable at 5V. | TSSOP8 offers smaller footprint than PDIP; no native WP pin-write protection implemented in firmware only. | Choose when board area is critical and hardware write lock is not mandatory for the target safety profile. |
Compared with AT24C01A-10PC, AT24C01D-SSHM-T offers SOIC packaging for SMT lines but lacks PDIP compatibility, while M24C01-RMN6TP provides TSSOP miniaturization and higher-speed headroom at 5V but removes hardware write protection-requiring careful firmware validation for data integrity.
Availability
AT24C01A-10PC is available at Aetrix Electronics and suitable for smart home controllers, industrial I/O modules, POS terminals, and medical device calibration storage requiring stable component supply across multi-year production cycles.
Supply support for AT24C01A-10PC 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 AT24C series EEPROMs.
The AT24C01A product line delivers cost-optimized, low-voltage serial EEPROMs for embedded systems needing reliable, pin-compatible nonvolatile storage in space- and power-constrained designs.
FAQ
What is the maximum I²C clock frequency supported by the AT24C01A-10PC?
The AT24C01A-10PC supports up to 100 kHz I²C clock frequency across its full 2.7V–5.5V operating range. While some variants in the AT24C family support 400 kHz at 5V, the AT24C01A-10PC is specifically rated for 100 kHz operation regardless of VCC level-ensuring timing margin in noisy or long-bus industrial environments. This specification is confirmed in the AC Characteristics table of the official datasheet.
Does the AT24C01A-10PC have built-in hardware write protection?
Yes, the AT24C01A-10PC includes a dedicated Write Protect (WP) pin that provides hardware-level write lock for the entire 1K memory array. When WP is pulled high to VCC, all write operations-including byte and page writes-are disabled; only read operations remain functional. This feature is implemented entirely in silicon and requires no firmware interaction, making it ideal for safety-critical or tamper-resistant applications.
What package type is used for the AT24C01A-10PC?
The AT24C01A-10PC uses an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, with JEDEC MS-001 BA standard dimensions. This through-hole package supports manual prototyping, socket-based testing, and legacy wave-soldered production. Pin 1 is marked with a notch or dot, and the layout matches standard 8-pin DIP footprints used across decades of embedded designs.
How many devices can share the same I²C bus with the AT24C01A-10PC?
Up to eight AT24C01A-10PC devices can operate on a single I²C bus. This is enabled by three hardwired device address inputs (A0, A1, A2), each configurable as high or low to generate a unique 3-bit address segment within the standard 7-bit I²C slave address format. No external address decoding logic is required-address resolution is handled entirely by the EEPROM's internal circuitry.
What is the typical write endurance and data retention of the AT24C01A-10PC?
The AT24C01A-10PC is specified for 1 million write cycles per memory location and 100 years of data retention at +25°C. These values are production-tested and guaranteed across the commercial temperature range (0°C to +70°C). Endurance applies to individual byte addresses, and retention assumes proper storage conditions-no battery or refresh circuitry is needed to maintain stored data over the product's service life.
AT24C01A-10PC 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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C01A-10PC FAQ
1.How can I place an order for AT24C01A-10PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10PC 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-10PC reliable?
The price and inventory of AT24C01A-10PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C01A-10PC is usually 5 days.
3.What payment methods are accepted for AT24C01A-10PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10PC?
AT24C01A-10PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10PC 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-10PC?
For technical support, including AT24C01A-10PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10PC requirements.
6.How does Aetrix verify that AT24C01A-10PC is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10PC 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-10PC meets industry standards.
7.What is the process for return or replacement of AT24C01A-10PC?
All AT24C01A-10PC units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10PC, 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-10PC part is unused and in its original packaging.
Return procedure for AT24C01A-10PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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