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Microchip Technology AT24C01A-10PI-1.8
- Part No.:
- AT24C01A-10PI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C01A-10PI-1.8.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,239
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Product details
Overview
AT24C01A-10PI-1.8 from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C bus speed at 1.8V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in battery-powered IoT sensors for nonvolatile configuration storage.
For engineers reviewing the AT24C01A-10PI-1.8 datasheet, AT24C01A-10PI-1.8 pinout, AT24C01A-10PI-1.8 application, or AT24C01A-10PI-1.8 equivalent, key selection criteria include 1.8V minimum supply, industrial temperature range (–40°C to +85°C), 8-byte page write capability, Schmitt-triggered noise-immune inputs, and JEDEC SOIC-8 / PDIP-8 / TSSOP-8 package compatibility.
Technical Context
The AT24C01A-10PI-1.8 implements a two-wire (I²C) serial interface with open-drain SDA and edge-triggered SCL, supporting standard-mode (100 kHz) timing at 1.8V. Its internal memory is organized as 16 pages of 8 bytes each, requiring a 7-bit word address for random access.
It uses hardwired A0–A2 device address pins for multi-drop bus operation (up to eight devices), includes a dedicated Write Protect (WP) pin that disables all writes when pulled high, and employs self-timed internal write cycles with automatic acknowledge polling support.
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 device configuration tables |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters |
| I²C Clock Frequency | 100 kHz max at 1.8V - ensures reliable communication in low-power, noise-sensitive environments |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive byte/page writes; impacts firmware update latency |
| Endurance & Retention | 1 million write cycles / 100 years data retention - supports long-life deployments in field-upgradable industrial nodes |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade operation in automotive body control modules and factory automation controllers |
| Input Filtering | Schmitt-trigger inputs with 100 ns noise suppression - rejects EMI-induced glitches on SDA/SCL in electrically noisy enclosures |
Pinout & Package
AT24C01A-10PI-1.8 is supplied in an 8-lead JEDEC SOIC package (package code 8S1), measuring 3.99 mm × 4.98 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hard-wired inputs enabling up to eight AT24C01A-10PI-1.8 devices on one I²C bus; A0 = LSB, A2 = MSB |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; shares bus with other I²C peripherals |
| SCL | Serial Clock Input | Positive-edge clock input; master-generated; synchronizes all data transfers |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC to block all writes, tied to GND for normal read/write operation |
| VCC | Power Supply | 1.8V–5.5V supply input; decoupling capacitor (0.1 µF) required within 10 mm of pin |
| GND | Ground Reference | System ground return path; must be low-impedance and shared with microcontroller ground |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation | Guaranteed functionality down to 1.8V supply - eliminates need for voltage translators in 1.8V SoC designs |
| Hardware Write Protection | Dedicated WP pin enables irreversible lock of stored parameters during system runtime or field service |
| 8-byte Page Write | Allows burst programming of up to 8 bytes per write cycle - reduces I²C transaction overhead vs. single-byte writes |
| Schmitt-Trigger Inputs | Provides hysteresis on SDA/SCL to reject fast transients - critical for stable operation in motor-drive or power-conversion PCBs |
| Industrial Temperature Range | Validated operation from –40°C to +85°C - meets extended thermal requirements for outdoor gateways and PLC I/O modules |
Applications
| Smart Meter Calibration Storage | Industrial Sensor Node Configuration |
|---|---|
Use Scenario: Storing meter-specific calibration constants, tariff tables, and firmware version identifiers in electricity/water/gas meters deployed outdoors. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during boot and periodic recalibration; no real-time timing function. Use Value: Enables field-upgradable calibration without replacing hardware; 100-year retention ensures accuracy over full product lifetime. |
Use Scenario: Holding sensor offset/gain values, measurement ranges, and network credentials in battery-powered wireless temperature/humidity nodes. IC Role / Device Role / Timing Role: Persistent configuration register bank; accessed once per boot and on-demand during commissioning. Use Value: 1.8V operation extends battery life; WP pin prevents accidental overwrite during OTA updates. |
| Automotive Body Control Module | Medical Diagnostic Device Settings |
Use Scenario: Saving user preferences (mirror position, seat memory), fault logs, and module identification in 12V automotive subsystems with local 3.3V/1.8V regulation. IC Role / Device Role / Timing Role: System-level configuration EEPROM; interfaces directly with MCU I²C peripheral. Use Value: Industrial temp rating ensures reliability under hood temperature cycling; 1M endurance supports repeated diagnostic session logging. |
Use Scenario: Storing regulatory-compliant device settings (alarm thresholds, calibration dates, operator IDs) in portable ultrasound or glucose monitors. IC Role / Device Role / Timing Role: Secure parameter vault; WP pin physically prevents unauthorized configuration changes during clinical use. Use Value: 100-year data retention satisfies medical device traceability mandates; 1.8V compatibility enables integration with ultra-low-power ARM Cortex-M0+ MCUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02A-10PI-1.8 | 2K-bit capacity (256 × 8); identical 1.8V operation, package, and timing | Supports larger configuration sets (e.g., multi-sensor fusion parameters) | Select when >128 bytes of persistent storage is required without changing layout or firmware I²C addressing logic |
| M24C01-RMN6TP | STMicroelectronics 1K EEPROM; same 1.8V–5.5V range, SOIC-8, and 100 kHz speed, but uses different device address mapping (A0/A1 only) | Requires firmware adjustment of I²C slave address; pinout compatible but not drop-in | Choose for dual-sourcing where Atmel/Microchip supply continuity is a concern; verify address byte in software |
Compared with AT24C01A-10PI-1.8, AT24C02A-10PI-1.8 doubles storage while maintaining identical electrical behavior and footprint, whereas M24C01-RMN6TP offers second-source availability but requires minor I²C address reconfiguration in host firmware.
Availability
AT24C01A-10PI-1.8 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering infrastructure, and automotive body electronics requiring stable component supply across extended temperature and low-voltage operating conditions.
Supply support for AT24C01A-10PI-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 acquired Atmel in 2016 and continues to manufacture, qualify, and support the AT24Cxx family of serial EEPROMs with full backward compatibility and long-term product commitments.
The AT24C01A is part of Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power nonvolatile storage in industrial and consumer applications.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10PI-1.8 at 1.8V?
The AT24C01A-10PI-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at 1.8V. This is specified in the AC Characteristics table under fSCL for 1.8-volt operation. The device does not support 400 kHz at 1.8V - that speed is only guaranteed at VCC ≥ 4.5V. Designers must configure their MCU's I²C peripheral accordingly to avoid communication failures.
Does AT24C01A-10PI-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C01A-10PI-1.8 requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is a passive input. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; 4.7 kΩ is commonly used for 100 kHz operation with ≤400 pF total bus capacitance. Failure to install pull-ups will prevent I²C communication.
How many AT24C01A-10PI-1.8 devices can share the same I²C bus?
Up to eight AT24C01A-10PI-1.8 devices can share a single I²C bus using the A0, A1, and A2 address pins. These three pins form a 3-bit hardware address (000 to 111), allowing unique 7-bit device addresses from 0x50 to 0x57. All devices must have distinct A0–A2 combinations; floating or tied-together address pins will cause bus contention.
What happens to AT24C01A-10PI-1.8 when the WP pin is left unconnected?
Leaving the WP pin unconnected on AT24C01A-10PI-1.8 results in undefined behavior because the pin has no internal pull-up or pull-down. In practice, it may float to a logic high or low depending on PCB leakage and noise, potentially enabling or disabling writes unpredictably. The datasheet mandates explicit connection: tie to GND for full read/write access or to VCC for complete write protection. A 10 kΩ pull-down resistor is recommended if write-enable is required by default.
Is AT24C01A-10PI-1.8 pin-compatible with AT24C01A-10PI-2.5 or AT24C01A-10PI?
Yes, AT24C01A-10PI-1.8 is fully pin-compatible with AT24C01A-10PI-2.5 and AT24C01A-10PI because all share identical 8-lead SOIC packaging (8S1), identical pinout, and identical mechanical footprint. The suffixes (-1.8, -2.5, blank) denote different minimum supply voltage ratings but do not affect physical or logical pin assignments. However, substituting -1.8 for -2.5 in a 2.5V-only system is safe; substituting -2.5 into a 1.8V system will cause functional failure.
AT24C01A-10PI-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-10PI-1.8 FAQ
1.How can I place an order for AT24C01A-10PI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10PI-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-10PI-1.8 reliable?
The price and inventory of AT24C01A-10PI-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-10PI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C01A-10PI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10PI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10PI-1.8?
AT24C01A-10PI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10PI-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-10PI-1.8?
For technical support, including AT24C01A-10PI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01A-10PI-1.8 requirements.
6.How does Aetrix verify that AT24C01A-10PI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10PI-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-10PI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C01A-10PI-1.8?
All AT24C01A-10PI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10PI-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-10PI-1.8 part is unused and in its original packaging.
Return procedure for AT24C01A-10PI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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