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Microchip Technology AT24C01A-10PI
- Part No.:
- AT24C01A-10PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C01A-10PI.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,387
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Product details
Overview
AT24C01A-10PI from Microchip Technology (formerly Atmel) is a 1-Kbit (128 × 8) I²C-compatible serial EEPROM with industrial temperature range (–40°C to +85°C), 2.7V to 5.5V supply operation, 100 kHz maximum clock frequency, hardware write protection via WP pin, and 8-byte page write capability. It serves as nonvolatile configuration storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT24C01A-10PI datasheet, AT24C01A-10PI pinout, AT24C01A-10PI application, or AT24C01A-10PI equivalent, key selection criteria include its industrial-grade reliability (1M write cycles, 100-year data retention), low-voltage compatibility, SOIC/PDIP/TSSOP package options, and I²C bus address flexibility using A0–A2 pins.
Technical Context
The AT24C01A-10PI implements a two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses a 7-bit memory word address and supports byte-write and 8-byte page-write operations with self-timed internal write cycles up to 10 ms.
Device addressing relies on hard-wired A0–A2 pins (all active for AT24C01A), enabling up to eight devices on a single I²C bus. The WP pin provides hardware-level write protection: grounded for full read/write access, tied to VCC to lock the entire 1K array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits), organized as 16 pages of 8 bytes each |
| 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 low-power I²C systems; not rated for 400 kHz operation |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write commands; impacts firmware timing design |
| Endurance & Retention | 1 million write cycles / 100 years data retention - validated for long-life industrial deployments |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control and factory automation |
| Standby Current | 1.6 µA max at 2.7V - supports ultra-low-power battery-backed applications |
Pinout & Package
AT24C01A-10PI is supplied in an 8-pin PDIP (8P3) package per JEDEC standard, with 0.300" body width and through-hole mounting. Pin 1 is marked by a notch or dot; leads are tin-lead plated for solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Device Address Inputs | Hard-wired to set 3-bit I²C slave address (0x50–0x57); all three are functional for AT24C01A |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up resistor; shares bus with other I²C devices |
| SCL | Serial Clock Input | Input-only clock line with Schmitt trigger; determines I²C timing and synchronizes data transfers |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all writes to the entire 1K memory array |
| VCC | Power Supply | Primary supply input (2.7–5.5V); must be stable during write cycles to prevent corruption |
| GND | Ground Reference | System ground return path; must be low-impedance to ensure noise-free I²C signaling |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage I²C operation | Valid down to 2.7V supply - eliminates need for voltage translators when interfacing with 3.3V MCUs |
| Hardware write protection | WP pin disables all write operations when pulled high - prevents accidental firmware or calibration overwrites |
| Noise-immune inputs | Schmitt-triggered SCL and filtered inputs - suppresses EMI in electrically noisy industrial enclosures |
| Page write capability | 8-byte atomic page writes - reduces I²C transaction overhead vs. individual byte writes |
| Industrial temperature grade | –40°C to +85°C operation - certified for use in programmable logic controllers and HVAC control boards |
Applications
| Industrial Sensor Calibration | Embedded Power Management |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in motor drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibration constants accessed at system boot. Use Value: Enables field-replaceable sensors without recalibration; leverages 100-year data retention for maintenance-free operation. |
Use Scenario: Saving last-known state (e.g., output voltage setting, fault history) in DC-DC controller modules after power loss. IC Role / Device Role / Timing Role: Persistent memory for power sequencing parameters and error logs in PMIC subsystems. Use Value: Supports graceful restart and diagnostics; WP pin prevents corruption during brown-out conditions. |
| Consumer Appliance UI Settings | Network Equipment Configuration |
Use Scenario: Retaining user preferences (brightness, timer, language) in smart home appliances across AC power cycles. IC Role / Device Role / Timing Role: Low-power configuration store accessed infrequently via I²C during UI initialization. Use Value: Achieves sub-2 µA standby current - extends battery backup life in uninterruptible control panels. |
Use Scenario: Holding MAC address, port mapping, and firmware version metadata in managed Ethernet switches. IC Role / Device Role / Timing Role: Secure boot-time parameter store with hardware write lock enabled after provisioning. Use Value: WP pin ensures immutable identity data; 1M endurance supports frequent firmware updates without wear-out risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02-10PI | 2-Kbit capacity (256 × 8), same 2.7–5.5V range, identical pinout and I²C protocol | Provides double memory depth for larger configuration sets; requires no PCB change | Select when future firmware expansion or additional calibration points demand >1K storage |
| M24C01-RMN6TP | 1-Kbit STMicroelectronics EEPROM; 1.8–5.5V supply; 400 kHz I²C; TSSOP8 package | Broader voltage range and higher speed, but different WP behavior (active-low) and no industrial temp guarantee | Choose only if 400 kHz bus speed is required and board layout accommodates TSSOP8 footprint |
Compared with AT24C01A-10PI, AT24C02-10PI offers scalable memory without interface changes, while M24C01-RMN6TP trades guaranteed industrial temperature operation for wider voltage range and faster I²C - making AT24C01A-10PI optimal for cost-sensitive, thermally demanding industrial designs where 100 kHz suffices.
Availability
AT24C01A-10PI is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power management, and consumer appliance UI settings requiring stable component supply across extended product lifecycles.
Supply support for AT24C01A-10PI 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 family of serial EEPROMs.
The AT24C01A product line delivers compact, reliable nonvolatile storage for resource-constrained embedded systems, emphasizing low-power operation, industrial temperature resilience, and I²C bus simplicity.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10PI?
The AT24C01A-10PI is rated for 100 kHz maximum SCL frequency under 2.7V–5.5V operation. Although some variants in the AT24Cxx family support 400 kHz, the -10PI suffix specifically denotes the 100 kHz industrial-grade version - exceeding this frequency risks unreliable communication or data corruption.
Does AT24C01A-10PI support partial page writes?
Yes, AT24C01A-10PI supports partial page writes within its 8-byte pages. Firmware may transmit fewer than 8 bytes in a single page-write sequence; the internal address counter increments automatically, and remaining bytes in the page retain prior values - enabling efficient small-data updates without full-page erasure.
How does the WP pin function on AT24C01A-10PI?
On AT24C01A-10PI, the WP pin is active-high: when pulled to VCC, it disables all write operations to the entire 1K memory array, including byte and page writes. When grounded, full read/write access is enabled. This hardware lock operates independently of I²C commands and requires no software intervention.
What package types are available for AT24C01A-10PI?
AT24C01A-10PI is offered in three industry-standard packages: 8-pin PDIP (8P3), 8-lead JEDEC SOIC (8S1), and 8-lead TSSOP (8T). All share identical pinout and electrical specifications; the choice depends on assembly method (through-hole vs. surface-mount) and board space constraints.
Is AT24C01A-10PI suitable for automotive applications?
No, AT24C01A-10PI is specified for industrial temperature range (–40°C to +85°C), not automotive AEC-Q100 qualification. For automotive use, Microchip offers the AT24C01A-10UM (automotive grade, –40°C to +125°C); AT24C01A-10PI should be limited to industrial, commercial, or consumer equipment meeting its stated environmental limits.
AT24C01A-10PI 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C01A-10PI FAQ
1.How can I place an order for AT24C01A-10PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10PI 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-10PI reliable?
The price and inventory of AT24C01A-10PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C01A-10PI is usually 5 days.
3.What payment methods are accepted for AT24C01A-10PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10PI?
AT24C01A-10PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10PI 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-10PI?
For technical support, including AT24C01A-10PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10PI requirements.
6.How does Aetrix verify that AT24C01A-10PI is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10PI 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-10PI meets industry standards.
7.What is the process for return or replacement of AT24C01A-10PI?
All AT24C01A-10PI units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10PI, 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-10PI part is unused and in its original packaging.
Return procedure for AT24C01A-10PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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