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Microchip Technology AT24C01A-10PU-1.8
- Part No.:
- AT24C01A-10PU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C01A-10PU-1.8.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,031
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Product details
Overview
AT24C01A-10PU-1.8 from Microchip Technology is a 1K-bit (128 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems, supporting 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 is used in industrial sensor calibration storage, IoT device configuration retention, and power-constrained microcontroller peripherals.
For engineers reviewing the AT24C01A-10PU-1.8 datasheet, AT24C01A-10PU-1.8 pinout, AT24C01A-10PU-1.8 application, or AT24C01A-10PU-1.8 equivalent, key selection criteria include 1.8V minimum supply compatibility, 100 kHz I²C timing at low voltage, JEDEC SOIC-8 package footprint, WP-enabled hardware data lock, and 1 million write cycle endurance.
Technical Context
The AT24C01A-10PU-1.8 implements a standard two-wire (I²C-compatible) serial interface with open-drain SDA and edge-triggered SCL, supporting standard-mode clocking up to 100 kHz at 1.8V. Its internal address counter enables sequential read and current-address read modes without external address latching.
It uses Schmitt-trigger inputs with noise filtering on SDA and SCL, supports partial page writes within its 8-byte pages, and features self-timed internal write cycles completing in ≤5 ms. The device includes hard-wired A0–A2 pins for multi-device bus addressing (up to eight 1K devices), with WP pin enabling full-array hardware write protection when pulled high.
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-boundary constraints for write operations. |
| 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 - determines minimum time between successive write commands and impacts firmware timeout design. |
| Endurance | 1 million write cycles - specifies guaranteed rewrite count before parametric degradation, critical for frequent configuration updates. |
| Data Retention | 100 years at +25°C - ensures long-term validity of stored calibration or identity data without refresh. |
| Operating Temperature | –40°C to +85°C - qualifies use in industrial and automotive cabin environments without derating. |
Pinout & Package
AT24C01A-10PU-1.8 is supplied in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide body, RoHS-compliant and green-packaged ("U" suffix). Dimensions: 4.90 mm × 3.90 mm × 1.75 mm (L × W × H), with 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired LSB of 3-bit device address; enables up to eight AT24C01A-10PU-1.8 devices on one I²C bus. |
| A1 | Device Address Input | Mid-bit of 3-bit device address; tied high/low to configure unique slave address in multi-device systems. |
| A2 | Device Address Input | MSB of 3-bit device address; completes 3-bit hardware-selectable address (0x50–0x57 range). |
| GND | Ground Reference | Return path for all internal circuitry and I/O; must be low-impedance to ensure noise immunity and stable logic thresholds. |
| VCC | Power Supply | Primary supply input (1.8V–5.5V); powers EEPROM core, interface logic, and charge pump for write operations. |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write operations, protecting stored data against accidental overwrite. |
| SCL | Serial Clock Input | Positive-edge clock for data sampling; requires external pull-up and synchronizes all I²C transactions. |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C bus; requires external pull-up and supports wire-OR multi-master arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger, filtered inputs | Enables robust I²C communication in electrically noisy industrial environments by rejecting sub-100 ns glitches on SCL/SDA. |
| 8-byte page write mode | Reduces firmware overhead by allowing up to 8 sequential bytes to be written per stop condition, improving update efficiency. |
| Self-timed internal write cycle | Eliminates need for precise software timing delays; host can poll ACK or wait fixed 5 ms before next command. |
| Hardware write protection (WP) | Provides fail-safe data integrity during power transitions or firmware faults-no software dependency required. |
| 1.8V–5.5V wide supply range | Supports direct integration with 1.8V microcontrollers (e.g., ARM Cortex-M0+) and legacy 3.3V/5V systems without regulators. |
Applications
| Industrial Sensor Calibration | IoT Device Identity Storage |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, or humidity sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed at system boot to initialize ADC reference points and linearization parameters. Use Value: Enables field-replaceable sensor modules with persistent calibration; eliminates need for reprogramming after power loss. |
Use Scenario: Holding unique device identifiers (MAC address, serial number, cryptographic keys) in battery-powered smart meters and asset trackers. IC Role / Device Role / Timing Role: Secure, low-power persistent storage accessed only during initial provisioning and firmware updates. Use Value: Guarantees tamper-resistant identity persistence over 10+ year deployments with 100-year data retention. |
| Embedded System Configuration | Consumer Appliance Settings |
|
Use Scenario: Saving user preferences (display brightness, language, network SSID) in medical monitors and industrial HMIs. IC Role / Device Role / Timing Role: Low-latency, byte-addressable memory mapped via I²C for rapid read/write of small configuration blocks. Use Value: Supports instant resume from standby with zero boot delay for settings recall; withstands >1M daily write cycles in high-usage UIs. |
Use Scenario: Retaining cooking mode history, timer presets, and child-lock status in smart ovens and washing machines. IC Role / Device Role / Timing Role: Cost-optimized, pin-efficient nonvolatile memory interfaced directly to 8-bit MCU I²C peripheral. Use Value: Delivers reliable state retention across 10,000+ power cycles with JEDEC SOIC-8 footprint compatible with legacy PCB layouts. |
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 identical 1K-bit capacity, same SOIC-8 package, but rated for 1.7V–5.5V and enhanced ESD performance (4 kV HBM). | Recommended for new designs requiring extended low-voltage margin and higher robustness in automated test environments. | Select AT24C01B-SSHM-T when designing for production beyond 2025; AT24C01A-10PU-1.8 remains valid for legacy repair and continuity. |
| CAT24C01HU4IGT3 | ON Semiconductor 1K-bit EEPROM in 8-lead TSSOP; supports 1.8V–5.5V, 100 kHz @ 1.8V, but lacks A0–A2 address pins (fixed address 0x50 only). | Suitable for single-device I²C nodes where address flexibility is unnecessary and TSSOP footprint is preferred over SOIC. | Choose CAT24C01HU4IGT3 only if board layout accommodates TSSOP-8 and bus topology uses only one EEPROM per segment. |
Compared with AT24C01A-10PU-1.8, AT24C01B-SSHM-T offers lower minimum voltage and improved reliability for future designs, while CAT24C01HU4IGT3 trades address configurability for compact TSSOP packaging - both require validation of WP functionality and timing compliance in target systems.
Availability
AT24C01A-10PU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, IoT device identity storage, and embedded system configuration requiring stable component supply across extended product lifecycles.
Supply support for AT24C01A-10PU-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 microcontrollers, analog components, and memory solutions, with a focus on embedded control and connectivity.
The AT24C01A-10PU-1.8 belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in space- and energy-constrained embedded systems.
FAQ
What is the minimum operating voltage for the AT24C01A-10PU-1.8?
The AT24C01A-10PU-1.8 operates down to 1.8V, as confirmed by its "–1.8" suffix and DC Characteristics table specifying VCC min = 1.8V. This allows direct interfacing with 1.8V I/O domains without level shifters. Operation below 1.8V is not guaranteed and may result in unreliable reads/writes or failure to acknowledge I²C addresses. Always maintain VCC ≥ 1.8V across temperature and load conditions for AT24C01A-10PU-1.8.
Does the AT24C01A-10PU-1.8 support standard I²C protocol?
Yes, the AT24C01A-10PU-1.8 implements a standard two-wire interface fully compatible with I²C protocol specifications, including START/STOP conditions, 7-bit slave addressing (with R/W bit), and ACK/NACK handshaking. It supports standard-mode speeds up to 100 kHz at 1.8V and 400 kHz at ≥2.7V. No proprietary extensions or modifications are required to use AT24C01A-10PU-1.8 in standard I²C systems.
How many devices can share the same I²C bus with AT24C01A-10PU-1.8?
Up to eight AT24C01A-10PU-1.8 devices can coexist on a single I²C bus using hardware-configurable device addresses via A0, A1, and A2 pins. Each combination of A0–A2 ties yields a unique 7-bit address in the 0x50–0x57 range. This assumes no other I²C devices occupy those addresses and that bus capacitance remains ≤400 pF - verified in actual layout for AT24C01A-10PU-1.8 deployments.
What happens when the WP pin is connected to VCC on the AT24C01A-10PU-1.8?
When WP is pulled high to VCC, the AT24C01A-10PU-1.8 enters full-array hardware write protection mode: all write operations (byte, page, and erase) are blocked, and the device responds only to read commands. Writes are rejected silently - no error flag or NACK is generated. This behavior is specified in Table 2 of the datasheet and applies uniformly across the entire 1K-bit memory array of AT24C01A-10PU-1.8.
Is the AT24C01A-10PU-1.8 suitable for automotive applications?
The AT24C01A-10PU-1.8 is qualified for industrial temperature range (–40°C to +85°C) and listed as "Automotive Devices Available" in the datasheet, but this refers to a separate automotive-grade variant (e.g., AT24C01A-10PU-1.8A) with AEC-Q100 qualification. The standard AT24C01A-10PU-1.8 is not AEC-Q100 certified and should not be used in safety-critical automotive ECUs without additional qualification testing and validation for AT24C01A-10PU-1.8.
AT24C01A-10PU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C01A-10PU-1.8 FAQ
1.How can I place an order for AT24C01A-10PU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10PU-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-10PU-1.8 reliable?
The price and inventory of AT24C01A-10PU-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-10PU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C01A-10PU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10PU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10PU-1.8?
AT24C01A-10PU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10PU-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-10PU-1.8?
For technical support, including AT24C01A-10PU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10PU-1.8 requirements.
6.How does Aetrix verify that AT24C01A-10PU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10PU-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-10PU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C01A-10PU-1.8?
All AT24C01A-10PU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10PU-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-10PU-1.8 part is unused and in its original packaging.
Return procedure for AT24C01A-10PU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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