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Microchip Technology AT24C01A-10SU-1.8
- Part No.:
- AT24C01A-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C01A-10SU-1.8.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,577
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Product details
Overview
AT24C01A-10SU-1.8 from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C communication at 1.8V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention - used in industrial sensor calibration storage and power-management configuration memory.
For engineers reviewing the AT24C01A-10SU-1.8 datasheet, AT24C01A-10SU-1.8 pinout, AT24C01A-10SU-1.8 application, or AT24C01A-10SU-1.8 equivalent, key selection criteria include 1.8V minimum supply compatibility, SOIC-8 package footprint, 8-byte page write capability, Schmitt-triggered noise-immune inputs, and hardware-based write protection for firmware-critical parameter storage.
Technical Context
The AT24C01A-10SU-1.8 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting standard-mode (100 kHz) operation down to 1.8V. Its internal address counter enables sequential reads across pages, and device addressing uses hard-wired A0–A2 pins for up to eight devices on one bus.
It employs a self-timed internal write cycle (max 5 ms), includes Schmitt-triggered inputs with 100 ns noise suppression, and uses a dedicated WP pin to disable all write operations when pulled high - ensuring robustness against accidental overwrites during brown-out or reset conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits), organized as 16 pages of 8 bytes each - defines maximum byte-addressable space and page-write granularity. |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 100 kHz at VCC = 1.8V - sets maximum reliable communication speed under lowest operating voltage condition. |
| Write Cycle Time | 5 ms max - determines minimum time between successive write commands and impacts firmware timeout design. |
| Endurance | 1 million write cycles - specifies guaranteed rewrite count before wear-out, critical for frequently updated configuration data. |
| Data Retention | 100 years at +25°C - ensures long-term validity of stored calibration or security keys without refresh. |
| Standby Current | 0.6 µA typical at VCC = 1.8V - enables ultra-low-power operation in battery-backed or energy-harvesting applications. |
Pinout & Package
AT24C01A-10SU-1.8 is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide body, RoHS-compliant green package with NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired address bit enabling up to eight AT24C01A devices on one I²C bus; tied low or high per system topology. |
| A1 | Device Address Input | Second hard-wired address bit; used with A0 and A2 to form unique 3-bit device address for multi-device configurations. |
| A2 | Device Address Input | Third hard-wired address bit; all three (A0–A2) determine slave address (0x50–0x57) in 7-bit I²C addressing. |
| GND | Ground Reference | System common return path for VCC, signals, and internal EEPROM substrate bias. |
| VCC | Power Supply | Primary supply input (1.8–5.5V); powers internal logic, memory array, and I/O buffers - must be decoupled locally. |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write operations including byte/page writes and erase - prevents corruption during power transitions. |
| SCL | Serial Clock Input | Positive-edge clock for synchronous data transfer; open-drain compatible, requires external pull-up resistor. |
| SDA | Serial Data I/O | Bidirectional open-drain data line; shared across I²C bus, requires external pull-up and supports multi-master arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Guaranteed functionality at 1.8V supply enables direct integration with ultra-low-power microcontrollers and battery-powered sensors. |
| Hardware Write Protection | WP pin provides deterministic, voltage-level-controlled write disable - eliminates need for software locks or command sequences. |
| Schmitt-Trigger Inputs | Input hysteresis suppresses noise-induced false clock/data transitions in electrically noisy industrial environments. |
| 8-Byte Page Write Mode | Allows up to 8 sequential bytes to be written in one transaction, reducing I²C bus occupancy and host CPU overhead. |
| 100-Year Data Retention | Ensures stored calibration coefficients, device IDs, or security credentials remain valid over full product lifecycle without refresh. |
Applications
| Industrial Sensor Calibration Storage | Embedded Power Management Configuration |
|---|---|
Use Scenario: Storing factory-calibrated temperature/pressure offset and gain coefficients in HVAC controllers and process transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during boot and runtime via I²C; no timing-critical latency required. Use Value: Eliminates need for external trimming components and enables field recalibration while preserving settings across power cycles. | Use Scenario: Holding rail sequencing delays, voltage thresholds, and fault recovery policies in programmable PMICs and server VRMs. IC Role / Device Role / Timing Role: Configuration memory mapped to system management controller; read once at startup, not time-sensitive. Use Value: Enables flexible, firmware-updatable power policy without PCB redesign or mask ROM re-spin. |
| Smart Meter Firmware Parameter Storage | IoT Edge Device Identity & Security Keys |
Use Scenario: Saving tariff schedules, pulse constants, and metering calibration data in ANSI C12.19-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage accessed infrequently via isolated I²C bus; WP pin tied to secure MCU GPIO. Use Value: Meets ANSI/IEC requirements for parameter persistence and write-protection during mains interruption or brown-out events. | Use Scenario: Storing device-unique identifiers (UID), X.509 certificate fingerprints, and symmetric keys in LoRaWAN end-nodes and NB-IoT trackers. IC Role / Device Role / Timing Role: Cryptographic key repository with hardware write-disable; accessed only during secure boot or OTA update verification. Use Value: Provides root-of-trust foundation without requiring dedicated secure element ICs, reducing BOM cost and footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C01B-SSHM-T | Successor generation with enhanced ESD rating (4 kV HBM), same 1K capacity, SOIC-8, 1.7–5.5V range, and identical pinout. | Designed for new designs requiring extended reliability in harsh environments; supports same I²C protocol and page write mode. | Select when upgrading legacy AT24C01A-based designs for improved robustness and long-term availability. |
| M24C01-RMN6TP | STMicroelectronics 1K EEPROM in SOIC-8; 1.8–5.5V, 400 kHz max (at ≥2.5V), 1M endurance, but lacks dedicated WP pin - uses software write protection only. | Requires firmware-level lock implementation; unsuitable where hardware-level write disable is mandated by safety standards. | Choose for cost-sensitive applications where software-controlled protection suffices and higher-speed operation above 1.8V is beneficial. |
Compared with AT24C01A-10SU-1.8, AT24C01B-SSHM-T offers superior ESD immunity and broader voltage margin, while M24C01-RMN6TP trades hardware write protection for higher I²C speed at elevated voltages - making the original part optimal for 1.8V-constrained, safety-critical, or legacy-compatible deployments.
Availability
AT24C01A-10SU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded power management configuration, and smart meter firmware parameter storage requiring stable component supply across extended production lifecycles.
Supply support for AT24C01A-10SU-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 is a leading provider of microcontroller, analog, FPGA, and memory solutions, delivering scalable, secure, and energy-efficient semiconductor products for industrial, automotive, and consumer markets.
The AT24C01A-10SU-1.8 belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, space-constrained embedded systems requiring reliable nonvolatile storage with minimal external components and robust noise immunity.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10SU-1.8 at 1.8V?
The AT24C01A-10SU-1.8 supports a maximum I²C clock frequency of 100 kHz when operating at VCC = 1.8V. This is specified in Table 5 of the official datasheet under "1.8-volt" AC characteristics. At higher supply voltages (≥2.7V), it supports up to 400 kHz, but the 100 kHz limit applies strictly to the 1.8V operation mode of AT24C01A-10SU-1.8.
Does AT24C01A-10SU-1.8 have a dedicated hardware write protect pin?
Yes, AT24C01A-10SU-1.8 includes a dedicated Write Protect (WP) pin. When WP is driven high (to VCC), all write operations - including byte writes, page writes, and write-to-status-register - are disabled. When WP is grounded, normal read/write functionality is enabled. This hardware-level protection is independent of I²C commands and remains active during power transitions.
What package type is used for AT24C01A-10SU-1.8?
AT24C01A-10SU-1.8 uses an 8-lead JEDEC SOIC package (designated 8S1), 0.150" wide body, with RoHS-compliant green molding compound and NiPdAu lead finish. The "SU" suffix in the part number explicitly denotes this SOIC packaging variant per Microchip's ordering information table.
How many devices can share the same I²C bus using AT24C01A-10SU-1.8?
Up to eight AT24C01A-10SU-1.8 devices can be addressed on a single I²C bus. This is achieved using the three hard-wired device address inputs (A0, A1, A2), which combine to form a 3-bit address extension to the base I²C slave address (0x50). Each unique combination of A0–A2 yields a distinct 7-bit address from 0x50 to 0x57.
Is AT24C01A-10SU-1.8 suitable for automotive applications?
No, AT24C01A-10SU-1.8 is rated for industrial temperature range (–40°C to +85°C) and is not qualified to AEC-Q100 automotive standards. While the AT24C01A family includes automotive-grade variants (e.g., AT24C01A-10MU-1.8), the "SU" suffix indicates standard industrial SOIC packaging without automotive qualification. For automotive use, consult Microchip's automotive-specific ordering codes.
AT24C01A-10SU-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-10SU-1.8 FAQ
1.How can I place an order for AT24C01A-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10SU-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-10SU-1.8 reliable?
The price and inventory of AT24C01A-10SU-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-10SU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C01A-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10SU-1.8?
AT24C01A-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10SU-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-10SU-1.8?
For technical support, including AT24C01A-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10SU-1.8 requirements.
6.How does Aetrix verify that AT24C01A-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10SU-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-10SU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C01A-10SU-1.8?
All AT24C01A-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10SU-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-10SU-1.8 part is unused and in its original packaging.
Return procedure for AT24C01A-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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