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Microchip Technology AT24C01A-10TU-2.7-T
- Part No.:
- AT24C01A-10TU-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C01A-10TU-2.7-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,832
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Product details
Overview
AT24C01A-10TU-2.7-T from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM with 2.7V to 5.5V supply operation, 400 kHz I²C interface speed at 2.7V+, Schmitt-trigger inputs for noise immunity, and hardware write protection via the WP pin. It delivers 1 million write cycles and 100-year data retention in an 8-lead TSSOP package, used for configuration storage in industrial controllers and embedded power management systems.
For engineers reviewing the AT24C01A-10TU-2.7-T datasheet, AT24C01A-10TU-2.7-T pinout, AT24C01A-10TU-2.7-T application, or AT24C01A-10TU-2.7-T equivalent, key selection criteria include its 2.7V–5.5V operating range, 8-byte page write capability, TSSOP-8 footprint compatibility, and I²C bus address flexibility using A0–A2 pins.
Technical Context
The AT24C01A-10TU-2.7-T implements a standard two-wire I²C-compatible interface with open-drain SDA and edge-triggered SCL, supporting both byte and 8-byte page writes. Its internal address counter enables sequential reads across memory boundaries, and the WP pin provides hardware-level write lock for critical configuration registers.
It uses hard-wired A0–A2 device address inputs to support up to eight devices on a single I²C bus, with address decoding performed internally during the START condition. The device enters low-power standby mode (<4 µA at 2.7V) after STOP and remains responsive to ACK polling during write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits), sufficient for firmware revision IDs, calibration coefficients, or small system logs |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| I²C Clock Frequency | Up to 400 kHz at VCC ≥ 2.7V - supports fast configuration loading in real-time systems |
| Write Cycle Time | Max 5 ms - defines minimum interval between successive write commands; requires ACK polling or timeout handling |
| Endurance & Retention | 1 million write cycles / 100 years data retention - validated for long-life industrial deployments with infrequent updates |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications including motor drives and sensor nodes |
| Package | 8-lead TSSOP (8A2), 4.4 mm body width - surface-mount compatible with automated assembly and space-constrained PCB layouts |
Pinout & Package
AT24C01A-10TU-2.7-T is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP, JEDEC MO-153 variation AA), 4.4 mm body width, lead pitch 0.65 mm, RoHS-compliant green finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired LSB of 3-bit device address; enables up to eight AT24C01A-10TU-2.7-T units on one I²C bus |
| A1 | Device Address Input | Mid-bit of device address; tied high/low to configure unique 7-bit I²C slave address (1010xxx) |
| A2 | Device Address Input | MSB of device address; determines position in 8-device addressing scheme |
| GND | Ground Reference | Return path for VCC and signal logic; must be low-impedance to ensure noise-immune I²C signaling |
| VCC | Power Supply | 2.7V–5.5V main supply; powers internal EEPROM array and I²C interface circuitry |
| WP | Write Protect Control | Hardware lock: pulled high to disable all writes; grounded for normal read/write access |
| SCL | Serial Clock Input | Positive-edge clock for data sampling; requires external pull-up; defines I²C timing compliance |
| SDA | Serial Data I/O | Open-drain bidirectional line; shared across multiple I²C devices; requires external pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire Serial Interface | Fully compliant with I²C protocol (standard-mode), enabling seamless integration with microcontrollers, SoCs, and PMICs without additional bus logic |
| Schmitt Trigger Inputs | Input hysteresis on SCL/SDA suppresses noise-induced glitches in electrically noisy industrial environments |
| 8-byte Page Write Mode | Reduces firmware update time by up to 7× vs. byte-write for contiguous 8-byte blocks (e.g., sensor calibration tables) |
| Self-timed Write Cycle | Internal timing eliminates need for host MCU to manage write duration; ACK polling confirms completion |
| Hardware Write Protection | WP pin allows field-safe locking of stored parameters (e.g., factory defaults) without software intervention or fuse blowing |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Memory |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable settings without firmware reflashing; retains values across power loss and thermal cycling. | Use Scenario: Holding temperature-compensated offset/gain coefficients for MEMS accelerometers and pressure transducers. IC Role / Device Role / Timing Role: Persistent parameter store read once per sensor initialization; written only during factory calibration or field recalibration. Use Value: Eliminates need for external trimming components; supports ±0.1% accuracy over –40°C to +85°C with 100-year retention. |
| Embedded Power Supply Sequencing | Consumer Appliance State Memory |
Use Scenario: Recording power-on sequence delays, voltage ramp rates, and fault recovery policies in multi-rail DC-DC modules. IC Role / Device Role / Timing Role: Boot-time configuration loader for PMICs and sequencer ICs; accessed before main processor initialization. Use Value: Ensures deterministic startup behavior across voltage sags and brownouts; survives >1M power cycles. | Use Scenario: Saving user preferences (e.g., timer settings, display brightness, language) in washing machines and HVAC remotes. IC Role / Device Role / Timing Role: Low-power nonvolatile scratchpad updated on button press or menu navigation. Use Value: Operates reliably at 2.7V during battery-backed operation; consumes <4 µA in standby to extend coin-cell life. |
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 device with enhanced ESD rating (4 kV HBM), same 1K capacity, TSSOP-8, 1.7V–5.5V range | Preferred for new designs requiring higher robustness in electrostatic-prone environments (e.g., handheld test equipment) | Select when upgrading legacy AT24C01A-10TU-2.7-T designs for improved reliability; pinout and firmware identical |
| STMicro M24C01-RMN6TP | 1K I²C EEPROM, 1.8V–5.5V, 400 kHz, TSSOP-8, but lacks dedicated WP pin (write protect via software lock) | Suitable where hardware write protection is not required, and cost optimization is prioritized over field safety | Choose for cost-sensitive consumer applications where firmware-controlled protection suffices and WP pin is unused |
Compared with AT24C01A-10TU-2.7-T, AT24C01B-SSHM-T offers higher ESD tolerance and broader voltage range while maintaining full pin and code compatibility, whereas M24C01-RMN6TP trades hardware WP for lower unit cost and slightly reduced voltage floor - making it viable only where write-locking is managed in software.
Availability
AT24C01A-10TU-2.7-T is available at Aetrix Electronics and suitable for industrial control systems, smart sensor nodes, embedded power management, and consumer appliance design requiring stable component supply and long-term obsolescence planning.
Supply support for AT24C01A-10TU-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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The AT24C01A-10TU-2.7-T belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for low-voltage, low-power configuration storage in resource-constrained embedded systems with strict reliability requirements.
FAQ
What is the maximum I²C clock frequency supported by the AT24C01A-10TU-2.7-T?
The AT24C01A-10TU-2.7-T supports up to 400 kHz I²C clock frequency when operated at VCC ≥ 2.7V. At lower voltages (e.g., 1.8V), the maximum rated speed drops to 100 kHz. This specification is verified per AC Characteristics Table 5 in the official datasheet and applies directly to the AT24C01A-10TU-2.7-T variant in TSSOP-8 packaging.
Does the AT24C01A-10TU-2.7-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C01A-10TU-2.7-T requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and target speed; 4.7 kΩ is commonly used for 400 kHz operation with ≤400 pF total bus load. This requirement is explicitly stated in the Pin Description section for SDA and SCL in the AT24C01A-10TU-2.7-T datasheet.
How many devices can share the same I²C bus with the AT24C01A-10TU-2.7-T?
Up to eight AT24C01A-10TU-2.7-T devices can share a single I²C bus, enabled by the three hardware address pins A0, A1, and A2. Each combination of high/low states on these pins generates a unique 7-bit slave address (base 1010xxx). This addressing scheme is confirmed in the Device Addressing section of the AT24C01A-10TU-2.7-T datasheet and applies identically across all SOIC, TSSOP, and PDIP variants of the AT24C01A.
What is the purpose of the WP pin on the AT24C01A-10TU-2.7-T?
The WP (Write Protect) pin on the AT24C01A-10TU-2.7-T provides hardware-level write inhibition: when pulled high to VCC, it disables all write operations to the entire 1K memory array while permitting unrestricted reads. When grounded, normal read/write functionality resumes. This behavior is documented in Table 2 (Write Protect) and Pin Description section of the AT24C01A-10TU-2.7-T datasheet and is independent of I²C command structure.
Is the AT24C01A-10TU-2.7-T suitable for automotive applications?
No, the AT24C01A-10TU-2.7-T is specified for industrial temperature range (–40°C to +85°C) and is not qualified to AEC-Q100 automotive standards. While it may function in some under-hood or cabin environments, Microchip explicitly lists "Automotive Devices Available" as a separate product line (e.g., AT24C01A-MAU-T) with extended qualification. The AT24C01A-10TU-2.7-T datasheet does not include automotive stress testing, failure-in-time (FIT) data, or PPAP documentation.
AT24C01A-10TU-2.7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
AT24C01A-10TU-2.7-T FAQ
1.How can I place an order for AT24C01A-10TU-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10TU-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-10TU-2.7-T reliable?
The price and inventory of AT24C01A-10TU-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-10TU-2.7-T is usually 5 days.
3.What payment methods are accepted for AT24C01A-10TU-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10TU-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10TU-2.7-T?
AT24C01A-10TU-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10TU-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-10TU-2.7-T?
For technical support, including AT24C01A-10TU-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-10TU-2.7-T requirements.
6.How does Aetrix verify that AT24C01A-10TU-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10TU-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-10TU-2.7-T meets industry standards.
7.What is the process for return or replacement of AT24C01A-10TU-2.7-T?
All AT24C01A-10TU-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10TU-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-10TU-2.7-T part is unused and in its original packaging.
Return procedure for AT24C01A-10TU-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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