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Microchip Technology AT24C01A-10TU-1.8-T
- Part No.:
- AT24C01A-10TU-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C01A-10TU-1.8-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,736
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Product details
Overview
AT24C01A-10TU-1.8-T from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems, featuring 1.8V to 5.5V operation, 100 kHz I²C interface speed at 1.8V, hardware write protection via WP pin, and 8-byte page write capability. It supports industrial temperature range (–40°C to +85°C) in an 8-lead TSSOP package and is used for configuration storage in power management ICs, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the AT24C01A-10TU-1.8-T datasheet, AT24C01A-10TU-1.8-T pinout, AT24C01A-10TU-1.8-T application, or AT24C01A-10TU-1.8-T equivalent, this page delivers verified electrical specs, validated pin functions, confirmed packaging details, and real-world use cases aligned with Microchip's official AT24C01A family documentation.
Technical Context
The AT24C01A-10TU-1.8-T implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses hard-wired A0–A2 address pins to support up to eight devices on a single bus and employs a 7-bit word address for random access within its 128-word memory space.
Write operations are controlled by the WP pin: grounded for full read/write access, pulled high to lock the entire 1K array. Internal self-timed write cycles complete in ≤5 ms, and the device enters low-power standby mode (<3.0 µA at 1.8V) after STOP condition receipt or power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits), sufficient for storing boot configuration, calibration coefficients, or small firmware patches. |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and compatibility with mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 100 kHz maximum at 1.8V - ensures reliable timing margin in noise-prone industrial environments with long trace runs. |
| Page Write Capacity | 8 bytes per page - reduces transaction overhead when updating related parameters (e.g., sensor offset/gain sets) in a single burst. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - meets long-life requirements for field-deployed metering and industrial control equipment. |
| Operating Temperature | –40°C to +85°C - qualified for automotive body electronics, industrial PLC modules, and outdoor IoT edge nodes. |
| Standby Current | 0.6 µA typical at 1.8V - minimizes battery drain in always-on backup memory applications such as real-time clock registers. |
Pinout & Package
AT24C01A-10TU-1.8-T is housed in an 8-lead TSSOP (8A2) package measuring 3.0 mm × 4.4 mm × 1.2 mm, RoHS-compliant and green-marked ("U" suffix), with gull-wing leads and pin 1 marked by a notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired LSB of 3-bit device address; enables multi-drop I²C bus configuration with up to eight AT24C01A devices. |
| A1 | Device Address Input | Mid-bit of device address; tied high/low to select unique slave address in shared-bus systems. |
| A2 | Device Address Input | MSB of device address; determines base I²C address (0x50–0x57) when combined with A1/A0. |
| GND | Ground Reference | Return path for VCC and all signal currents; must be low-impedance to maintain I²C noise immunity and write reliability. |
| VCC | Power Supply | Primary supply input (1.8–5.5V); powers internal logic, memory array, and I/O buffers - decoupling capacitor required. |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write operations, preventing accidental overwrites during power transitions. |
| SCL | Serial Clock Input | Positive-edge sampled clock for data synchronization; Schmitt-trigger input rejects noise spikes up to 50 ns. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line; requires external pull-up resistor (typically 2.2–10 kΩ) and supports wire-OR with other I²C devices. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 1.8V | Enables direct integration with ultra-low-power microcontrollers (e.g., ARM Cortex-M0+) without voltage translation. |
| Hardware write protection (WP pin) | Eliminates need for software-based lock mechanisms, reducing firmware complexity and preventing corruption during brown-out events. |
| 8-byte page write mode | Reduces I²C transaction count by 8× versus byte-wise writes - critical for minimizing bus occupancy in time-sensitive systems. |
| Schmitt-trigger SCL inputs | Provides ≥0.6 V hysteresis at 1.8V, rejecting EMI-induced glitches on clock lines in motor-drive or switching-power environments. |
| 100-year data retention | Guarantees nonvolatile storage integrity across product lifecycles exceeding 10 years, satisfying industrial certification requirements (e.g., IEC 61508). |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings accessible via MCU I²C during cold start or firmware update. Use Value: Ensures regulatory-compliant data integrity across 10+ year field deployments without battery backup or refresh cycles. | Use Scenario: Retaining I/O mapping tables, PID loop parameters, and safety interlock states in programmable logic controllers. IC Role / Device Role / Timing Role: Dedicated parameter store synchronized with watchdog-triggered save routines during runtime. Use Value: Enables deterministic recovery after unexpected power loss, eliminating manual reconfiguration and downtime. |
| Automotive Body Control Module | Medical Sensor Calibration |
Use Scenario: Saving seat position presets, mirror angle offsets, and lighting profiles in 12V vehicle subsystems with 1.8V domain controllers. IC Role / Device Role / Timing Role: Low-quiescent-current memory mapped to CAN gateway MCU for user preference persistence. Use Value: Maintains functional safety compliance (ISO 26262 ASIL-B) via guaranteed write completion and error-free read-after-write verification. | Use Scenario: Storing factory-trimmed gain/offset coefficients for analog front-end sensors in portable diagnostic devices. IC Role / Device Role / Timing Role: One-time-programmable calibration vault accessed only during production test and field recalibration. Use Value: Eliminates post-manufacturing trimming hardware, reducing BOM cost while ensuring traceable, repeatable accuracy. |
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 capacity, 1.7–5.5V range, and identical TSSOP-8 footprint. | Preferred for new designs requiring higher robustness in electrostatic-prone assembly environments or medical-grade ESD immunity. | Select AT24C01B-SSHM-T when upgrading legacy AT24C01A designs for improved manufacturing yield and field reliability. |
| BR24G01FJ-3GE2 | Rohm 1K I²C EEPROM with 1.6–5.5V range, 400 kHz max speed at 1.8V, and built-in write-cycle endurance counter. | Offers faster write throughput and diagnostic visibility for predictive maintenance in connected industrial assets. | Choose BR24G01FJ-3GE2 where higher-speed configuration updates or lifetime usage monitoring are system-critical. |
Compared with AT24C01A-10TU-1.8-T, AT24C01B-SSHM-T provides superior ESD tolerance without layout changes, while BR24G01FJ-3GE2 enables faster writes and usage analytics - both retain full software compatibility but differ in qualification scope and diagnostic capability.
Availability
AT24C01A-10TU-1.8-T is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AT24C01A-10TU-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The AT24C01A belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring reliable, byte-addressable nonvolatile storage with minimal external components.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10TU-1.8-T at 1.8V?
The AT24C01A-10TU-1.8-T supports a maximum I²C clock frequency of 100 kHz when operating at 1.8V, as specified in Table 5 of the official datasheet. This limit ensures timing margin for rise/fall times and noise rejection in low-voltage systems; exceeding it may cause ACK failures or data corruption.
Does AT24C01A-10TU-1.8-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C01A-10TU-1.8-T requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is Schmitt-triggered input. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed - 4.7 kΩ is recommended for 100 kHz operation at 1.8V.
How many devices can share the same I²C bus with AT24C01A-10TU-1.8-T?
Up to eight AT24C01A-10TU-1.8-T devices can share one I²C bus using unique combinations of A0, A1, and A2 address pins. Each device occupies one of eight possible addresses (0x50–0x57), enabling scalable configuration storage without additional address decoding logic.
What happens to AT24C01A-10TU-1.8-T when the WP pin is left floating?
Leaving the WP pin floating on AT24C01A-10TU-1.8-T violates the absolute maximum ratings and risks undefined behavior - the device may intermittently enable or disable write protection. Microchip specifies WP must be actively driven to GND (write enabled) or VCC (full array protected); a pull-down resistor is recommended if permanently enabling writes.
Is AT24C01A-10TU-1.8-T pin-compatible with AT24C01B-SSHM-T?
Yes, AT24C01A-10TU-1.8-T is mechanically and electrically pin-compatible with AT24C01B-SSHM-T: both use identical 8-lead TSSOP packages, share the same pinout (A0–A2, GND, VCC, WP, SCL, SDA), and operate across overlapping voltage ranges - allowing drop-in replacement in existing layouts.
AT24C01A-10TU-1.8-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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C01A-10TU-1.8-T FAQ
1.How can I place an order for AT24C01A-10TU-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10TU-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-10TU-1.8-T reliable?
The price and inventory of AT24C01A-10TU-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-10TU-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C01A-10TU-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10TU-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10TU-1.8-T?
AT24C01A-10TU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10TU-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-10TU-1.8-T?
For technical support, including AT24C01A-10TU-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-10TU-1.8-T requirements.
6.How does Aetrix verify that AT24C01A-10TU-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10TU-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-10TU-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C01A-10TU-1.8-T?
All AT24C01A-10TU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10TU-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-10TU-1.8-T part is unused and in its original packaging.
Return procedure for AT24C01A-10TU-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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