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Microchip Technology AT24C01A-10SU-1.8-T
- Part No.:
- AT24C01A-10SU-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C01A-10SU-1.8-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,894
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Product details
Overview
AT24C01A-10SU-1.8-T 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. It is commonly used in industrial sensor calibration storage and power-management configuration memory.
For engineers reviewing the AT24C01A-10SU-1.8-T datasheet, AT24C01A-10SU-1.8-T pinout, AT24C01A-10SU-1.8-T application, or AT24C01A-10SU-1.8-T equivalent, key selection criteria include 1.8V minimum supply compatibility, 8-pin SOIC (8S1) package footprint, 100 kHz I²C timing at low voltage, page-write capability (8-byte pages), and hardware write-protect functionality.
Technical Context
The AT24C01A-10SU-1.8-T implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and active-high SCL, supporting standard-mode (100 kHz) operation down to 1.8V. Its internal architecture uses 16 pages of 8 bytes each, requiring a 7-bit word address for random access.
It incorporates Schmitt-trigger inputs and noise filtering on SDA/SCL for robust bus operation in electrically noisy environments. The WP pin enables full-array hardware write protection when pulled high, while A0–A2 pins provide hardwired device addressing-supporting up to eight devices on a single I²C bus.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits), organized as 16 pages of 8 bytes - defines maximum nonvolatile storage capacity 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 shifting. |
| I²C Clock Frequency | 100 kHz max at VCC = 1.8V - sets maximum reliable communication speed under low-voltage operation. |
| Write Cycle Time | 5 ms max - determines minimum time between successive write commands; impacts firmware timeout design. |
| Endurance | 1 million write cycles - specifies guaranteed reprogrammability before wear-out, critical for logging or counter applications. |
| Data Retention | 100 years at +25°C - ensures long-term validity of stored configuration or calibration data without refresh. |
| Standby Current | 0.6 µA typical at VCC = 1.8V - enables ultra-low-power operation in battery-backed or energy-harvesting systems. |
Pinout & Package
AT24C01A-10SU-1.8-T is housed in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide, RoHS-compliant and green-marked ("U"). Pin 1 is marked by a notch or dot; leads are gull-wing, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired address bit; enables multi-device I²C bus addressing (up to 8 devices with A0–A2). |
| A1 | Device Address Input | Second hardwired address bit; used with A0 and A2 to form 3-bit device address. |
| A2 | Device Address Input | Third hardwired address bit; completes 3-bit address for device selection on shared bus. |
| GND | Ground Reference | Primary return path for all internal circuitry and I/O; must be low-impedance for noise immunity. |
| VCC | Power Supply | Single-supply input (1.8V–5.5V); powers EEPROM core and I/O buffers; bypass capacitor required. |
| WP | Write Protect Control | Hardware-enforced write lock: high = full-array protection, low = normal read/write access. |
| SCL | Serial Clock Input | Positive-edge clock for data sampling; requires external pull-up; synchronizes all I²C transactions. |
| SDA | Serial Data I/O | Bidirectional, open-drain line; shared across I²C bus; requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Enables direct integration into 1.8V microcontroller subsystems without voltage translation circuitry. |
| Schmitt-Trigger Inputs | Improves noise immunity on SDA/SCL lines, reducing false start/stop detection in EMI-prone industrial environments. |
| 8-Byte Page Write | Allows burst programming of up to 8 bytes per write cycle, reducing firmware overhead vs. byte-by-byte writes. |
| Self-Timed Write Cycle | Eliminates need for external write timing control; host can poll ACK to detect completion. |
| Hardware Write Protection | Prevents accidental overwrites during power transitions or firmware faults via simple WP pin tie-off. |
Applications
| Industrial Sensor Calibration Storage | Embedded Power Management Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, or current sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during system boot or sensor initialization via I²C. Use Value: Enables field-replaceable sensor modules with persistent calibration; eliminates need for external trimming components. | Use Scenario: Holding configurable thresholds and sequencing parameters for PMICs or multi-rail DC-DC controllers in telecom base stations. IC Role / Device Role / Timing Role: I²C-configurable settings storage for power-on reset behavior and fault response policies. Use Value: Supports flexible power architecture deployment without PCB redesign; retains settings across cold starts. |
| Smart Meter Firmware Patch Storage | Medical Device Usage Log Buffer |
Use Scenario: Storing small firmware patches or security keys in utility smart meters where flash update bandwidth is constrained. IC Role / Device Role / Timing Role: Secondary nonvolatile memory for secure, infrequently updated code/data segments. Use Value: Reduces reliance on main MCU flash endurance; isolates critical updates from application code wear. | Use Scenario: Recording cumulative operational hours, self-test results, or calibration history in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power, tamper-resistant event logger synchronized to real-time clock interrupts. Use Value: Meets regulatory traceability requirements with 100-year data retention and hardware write-lock capability. |
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 part with enhanced ESD rating (4 kV HBM), same 1K size, 1.7V–5.5V range, identical 8S1 package and pinout. | Recommended for new designs requiring higher robustness in handling-sensitive environments. | Select when upgrading legacy AT24C01A designs for improved reliability; drop-in replacement with no layout change. |
| M24C01-RMN6TP | STMicroelectronics 1K EEPROM; 1.8V–5.5V, 100 kHz @ 1.8V, same 8-lead SOIC package but different pin 1 marking convention. | Valid alternative where ST ecosystem alignment or dual-sourcing is required. | Verify SDA/SCL rise/fall time compliance with target MCU; requires validation of WP pin behavior against application logic. |
Compared with AT24C01A-10SU-1.8-T, AT24C01B-SSHM-T offers higher ESD tolerance and broader voltage margin (1.7V min), while M24C01-RMN6TP provides second-source assurance but demands careful timing and protection-circuit validation.
Availability
AT24C01A-10SU-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded power management configuration, and medical device usage log buffering requiring stable component supply across extended production lifecycles.
Supply support for AT24C01A-10SU-1.8-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 is a leading provider of microcontrollers, analog components, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The AT24C01A belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, space-constrained embedded systems requiring robust, byte-addressable nonvolatile storage with minimal external components.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10SU-1.8-T at 1.8V?
The AT24C01A-10SU-1.8-T 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" conditions for fSCL. At higher supply voltages (≥2.7V), it supports up to 400 kHz, but AT24C01A-10SU-1.8-T is rated and characterized for 100 kHz operation at its minimum 1.8V supply.
Does AT24C01A-10SU-1.8-T support partial page writes?
Yes, AT24C01A-10SU-1.8-T supports partial page writes within its 8-byte pages. The device allows writing any number of bytes (1–8) starting at any address within a page, with automatic internal address incrementation. No alignment or full-page fill is required, simplifying firmware implementation for variable-length data updates.
What is the function of the A0, A1, and A2 pins on AT24C01A-10SU-1.8-T?
The A0, A1, and A2 pins on AT24C01A-10SU-1.8-T are hardwired device address inputs that configure the 3 most significant bits of the 7-bit I²C slave address. They allow up to eight AT24C01A-10SU-1.8-T devices to share a single I²C bus. All three pins are actively used for addressing in the AT24C01A variant, unlike larger family members where some are NC.
How does the Write Protect (WP) pin operate on AT24C01A-10SU-1.8-T?
When the WP pin on AT24C01A-10SU-1.8-T is driven high (to VCC), it disables all write operations-including byte, page, and erase commands-to the entire 1K memory array. When WP is low (GND), normal read and write functions are enabled. This hardware-level protection prevents accidental writes during power-up/down or firmware errors.
Is AT24C01A-10SU-1.8-T pin-compatible with AT24C01B-SSHM-T?
Yes, AT24C01A-10SU-1.8-T is pin-compatible with AT24C01B-SSHM-T: both use identical 8-lead SOIC (8S1) packaging and share the same pinout (A0–A2, GND, VCC, WP, SCL, SDA). The AT24C01B-SSHM-T is Microchip's recommended successor, offering enhanced ESD performance and extended voltage range while maintaining full electrical and mechanical compatibility with AT24C01A-10SU-1.8-T.
AT24C01A-10SU-1.8-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:
- 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-T FAQ
1.How can I place an order for AT24C01A-10SU-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10SU-1.8-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-10SU-1.8-T reliable?
The price and inventory of AT24C01A-10SU-1.8-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-10SU-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C01A-10SU-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10SU-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10SU-1.8-T?
AT24C01A-10SU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10SU-1.8-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-10SU-1.8-T?
For technical support, including AT24C01A-10SU-1.8-T 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-T requirements.
6.How does Aetrix verify that AT24C01A-10SU-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10SU-1.8-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-10SU-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C01A-10SU-1.8-T?
All AT24C01A-10SU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10SU-1.8-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-10SU-1.8-T part is unused and in its original packaging.
Return procedure for AT24C01A-10SU-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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