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Microchip Technology AT24C01A-10TI-2.7-T
- Part No.:
- AT24C01A-10TI-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C01A-10TI-2.7-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,732
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Product details
Overview
AT24C01A-10TI-2.7-T from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 2.7V to 5.5V, supports 100 kHz I²C bus speed, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial sensor calibration storage and firmware parameter backup in programmable logic controllers.
For engineers reviewing the AT24C01A-10TI-2.7-T datasheet, AT24C01A-10TI-2.7-T pinout, AT24C01A-10TI-2.7-T application, or AT24C01A-10TI-2.7-T equivalent, key selection factors include its industrial temperature range (−40°C to +85°C), TSSOP-8 package, 10 ms max write cycle time, and compatibility with standard I²C protocol including acknowledge polling and page write.
Technical Context
The AT24C01A-10TI-2.7-T implements a fixed 128-word × 8-bit memory array organized into 16 pages of 8 bytes each, requiring a 7-bit word address for random access. Its I²C interface uses open-drain SDA with Schmitt-trigger inputs and noise filtering for robust operation in electrically noisy environments.
Write protection is enforced exclusively through the WP pin: tied to VCC, it locks the full 1K array; tied to GND, full read/write functionality is enabled. The device enters low-power standby mode after STOP condition receipt and supports current-address, random-address, and sequential read modes without external address latching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8), sufficient for storing configuration registers or calibration coefficients in compact microcontroller systems. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct integration with 3.3V and 5V logic domains without level-shifting. |
| I²C Clock Frequency | 100 kHz maximum - ensures timing compliance with legacy and resource-constrained microcontrollers. |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive byte/page writes; requires acknowledge polling for completion detection. |
| Endurance | 1 million write cycles - supports frequent field-updatable parameters in industrial control applications. |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored settings across product lifecycles. |
| Operating Temperature | −40°C to +85°C - qualified for use in industrial automation, automotive body electronics, and outdoor metering equipment. |
| Package | TSSOP-8 (8T), 4.4 mm × 3.0 mm footprint - provides space-efficient surface-mount assembly compatible with automated PCB reflow. |
Pinout & Package
AT24C01A-10TI-2.7-T is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), JEDEC-compliant, with 0.65 mm lead pitch and exposed pad not present. Pin 1 is marked by a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired address bit; for AT24C01A, must match external wiring to enable multi-device I²C bus addressing (up to eight devices). |
| A1 | Device Address Input | Second hard-wired address bit; used with A0 and A2 to form 3-bit device address for bus arbitration. |
| A2 | Device Address Input | Third hard-wired address bit; all three (A0–A2) determine unique I²C slave address (0x50–0x57). |
| GND | Ground Reference | Primary return path for VCC and signal currents; must be low-impedance and decoupled near device. |
| VCC | Power Supply | 2.7V–5.5V supply input; requires local 0.1 µF ceramic decoupling capacitor placed adjacent to pin. |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write operations to entire memory array. |
| SCL | I²C Clock Input | Positive-edge clocked serial interface signal; requires external pull-up resistor (typically 4.7 kΩ). |
| SDA | I²C Data I/O | Open-drain bidirectional data line; shares pull-up with SCL or dedicated resistor; supports wire-OR with other I²C devices. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | Functional down to 2.7V supply - eliminates need for voltage regulators in 3.3V systems and reduces system power overhead. |
| Schmitt-trigger, filtered inputs | Immunity to noise on SCL/SDA lines - prevents spurious start/stop conditions in motor-driven or switching power supply environments. |
| Hardware write protection | WP pin directly gates internal write logic - provides deterministic, non-software-dependent memory lockdown during critical operation phases. |
| Page write capability | 8-byte burst writes reduce I²C transaction count - cuts firmware execution time and bus occupancy versus byte-by-byte programming. |
| Self-timed write cycle | No external timing control required - simplifies host firmware design; completion verified via acknowledge polling instead of fixed delays. |
| Industrial temperature grade | Qualified over −40°C to +85°C - ensures reliable operation in uncontrolled enclosures, factory floors, and outdoor infrastructure. |
Applications
| Industrial Sensor Calibration Storage | PLC Firmware Parameter Backup |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibrated values persistently across power cycles and firmware updates. Use Value: Eliminates recalibration during field replacement; preserves accuracy without battery-backed SRAM or external supervision circuitry. | Use Scenario: Retaining user-defined I/O mapping, scan rates, and alarm thresholds in modular PLC modules. IC Role / Device Role / Timing Role: Dedicated configuration EEPROM interfaced via I²C to main MCU; accessed only during boot or configuration change. Use Value: Enables field-upgradable operational parameters without firmware reflashing; supports hot-swap module identification and state recovery. |
| Smart Meter Tamper Log | Automotive Body Control Module Settings |
Use Scenario: Recording timestamped tamper events (cover removal, magnetic interference) in utility smart meters operating at 3.3V. IC Role / Device Role / Timing Role: Secure event logger with WP-enabled write-lock after initial commissioning to prevent log erasure. Use Value: Provides auditable, immutable tamper history compliant with ANSI C12.22 and DLMS/COSEM standards. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs with 2.7–5.5V supply rails. IC Role / Device Role / Timing Role: Low-power configuration store accessed infrequently during vehicle power-up or user adjustment. Use Value: Maintains personalized settings across ignition cycles; withstands automotive load-dump transients due to robust I/O filtering and wide VCC range. |
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-bit capacity and TSSOP-8 package, but newer revision with enhanced ESD rating (4 kV HBM) and tighter tAA (0.9 µs max at 5V). | Preferred for new designs requiring higher robustness in handling-sensitive manufacturing or harsh EMC environments. | Select AT24C01D-SSHM-T when upgrading for improved reliability; verify WP pin behavior and timing margins remain compatible. |
| BR24G01NUX-5TR | Rohm's 1K-bit I²C EEPROM in TSSOP-8; supports 1.7–5.5V, 400 kHz max, and 1.5 ms typical write cycle (vs. 10 ms max for AT24C01A). | Better suited for high-throughput parameter logging where faster write latency is critical, e.g., real-time data buffering. | Choose BR24G01NUX-5TR if write speed is prioritized over legacy compatibility; note different device address map and WP implementation. |
Compared with AT24C01A-10TI-2.7-T, AT24C01D-SSHM-T offers enhanced ESD immunity while maintaining pin and function compatibility, whereas BR24G01NUX-5TR trades longer write latency for broader voltage range and faster typical write time - making it suitable for latency-sensitive, low-voltage edge nodes.
Availability
AT24C01A-10TI-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration storage, PLC firmware parameter backup, and smart meter tamper log applications requiring stable component supply across extended production lifecycles.
Supply support for AT24C01A-10TI-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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on embedded control and connectivity.
The AT24C01A belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained industrial and automotive applications requiring reliable, low-power, I²C-compatible nonvolatile storage.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10TI-2.7-T?
The AT24C01A-10TI-2.7-T supports up to 100 kHz I²C clock frequency under its 2.7V–5.5V operating range. This is specified in the AC Characteristics table for 2.7-, 2.5-, and 1.8-volt versions. It does not support the 400 kHz mode reserved for 5.0V-only variants like AT24C01A-10TI.
Does AT24C01A-10TI-2.7-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C01A-10TI-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 speed; 4.7 kΩ is commonly used for 100 kHz operation with moderate trace length.
How many devices can share the same I²C bus with AT24C01A-10TI-2.7-T?
Up to eight AT24C01A-10TI-2.7-T devices can share one I²C bus, enabled by hard-wiring the A0, A1, and A2 pins to VCC or GND to generate unique 3-bit device addresses (0x50–0x57). All three address pins are functional for the AT24C01A variant.
What happens when the WP pin of AT24C01A-10TI-2.7-T is left floating?
The WP pin of AT24C01A-10TI-2.7-T must not be left floating: it has no internal pull-up or pull-down. A floating WP may cause indeterminate write protection behavior. Per datasheet guidance, WP should be explicitly tied to either GND (enabling writes) or VCC (disabling writes) using a direct connection or resistor.
Is AT24C01A-10TI-2.7-T compatible with standard I²C protocol implementations?
Yes, AT24C01A-10TI-2.7-T fully complies with standard I²C protocol requirements, including START/STOP conditions, 7-bit addressing with R/W bit, ACK/NACK handshaking, and repeated START support. It also implements acknowledge polling for write-cycle completion detection, ensuring interoperability with generic I²C masters.
AT24C01A-10TI-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-10TI-2.7-T FAQ
1.How can I place an order for AT24C01A-10TI-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10TI-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-10TI-2.7-T reliable?
The price and inventory of AT24C01A-10TI-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-10TI-2.7-T is usually 5 days.
3.What payment methods are accepted for AT24C01A-10TI-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10TI-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10TI-2.7-T?
AT24C01A-10TI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10TI-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-10TI-2.7-T?
For technical support, including AT24C01A-10TI-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-10TI-2.7-T requirements.
6.How does Aetrix verify that AT24C01A-10TI-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10TI-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-10TI-2.7-T meets industry standards.
7.What is the process for return or replacement of AT24C01A-10TI-2.7-T?
All AT24C01A-10TI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10TI-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-10TI-2.7-T part is unused and in its original packaging.
Return procedure for AT24C01A-10TI-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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