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Microchip Technology AT24C01A-10SI-1.8-T
- Part No.:
- AT24C01A-10SI-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C01A-10SI-1.8-T.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,540
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Product details
Overview
AT24C01A-10SI-1.8-T from Microchip Technology (formerly Atmel) is a 1K-bit (128 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates across 1.8V to 5.5V, supports 100 kHz I²C communication, 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-10SI-1.8-T datasheet, AT24C01A-10SI-1.8-T pinout, AT24C01A-10SI-1.8-T application, or AT24C01A-10SI-1.8-T equivalent, key selection criteria include 1.8V minimum supply, 8-byte page write capability, SOIC-8 package compatibility, industrial temperature range (−40°C to +85°C), and I²C bus address flexibility via A0–A2 pins.
Technical Context
The AT24C01A-10SI-1.8-T implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA/SCL inputs and open-drain bidirectional data transfer. Its internal 128-word × 8-bit memory array is organized into 16 pages of 8 bytes each, requiring a 7-bit word address for random access.
Write protection is enforced by the WP pin: tied to VCC, it locks the full 1K array; tied to GND, normal read/write operations proceed. The device enters low-power standby mode after STOP condition receipt or power-up, drawing only 3 µA at 1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 × 8), sufficient for firmware revision flags, calibration coefficients, or small device IDs |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage microcontrollers |
| I²C Clock Frequency | 100 kHz max at 1.8V - ensures reliable timing margin in noisy, low-power environments |
| Page Write Size | 8 bytes per page - reduces I²C transaction overhead when updating related parameter sets |
| Write Cycle Time | 10 ms max - defines minimum interval between write commands; requires polling or timeout handling |
| Endurance & Retention | 1 million write cycles / 100 years data retention - meets long-life requirements for field-deployed industrial nodes |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor sensor enclosures |
Pinout & Package
AT24C01A-10SI-1.8-T is housed in an 8-lead JEDEC-standard SOIC package (8S1), measuring 3.99 mm × 4.98 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch. This surface-mount package supports automated assembly and provides thermal/mechanical stability in reflow-soldered applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Device Address Inputs | Hard-wired inputs enabling up to eight AT24C01A devices on one I²C bus; all three used for 1K/2K variants |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; shares bus with other I²C peripherals |
| SCL | Serial Clock Input | Master-generated clock; rising edge samples data, falling edge drives data; filtered for noise immunity |
| WP | Write Protect Control | Hardware-enforced lock: VCC = full-array protection, GND = normal operation; no software dependency |
| VCC | Power Supply | 1.8V–5.5V input; decoupling capacitor required near pin for stable low-voltage operation |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance to minimize I²C noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Enables direct integration with modern ultra-low-power MCUs (e.g., ARM Cortex-M0+, MSP430FR) without level-shifting |
| Schmitt-Trigger Inputs | Rejects fast transients and EMI on SDA/SCL lines, improving robustness in electrically noisy industrial cabinets |
| Hardware Write Protection | Prevents accidental overwrites during firmware updates or brown-out conditions via simple VCC/GND tie-off |
| 8-Byte Page Writes | Reduces I²C bus occupancy by up to 8× vs. byte-wise writes - critical for real-time systems with tight latency budgets |
| Industrial Temperature Range | Validated operation from −40°C to +85°C ensures reliability in uncontrolled environments like factory floors or outdoor gateways |
Applications
| Smart Metering Module | Medical Wearable Sensor |
|---|---|
Use Scenario: Storing tariff tables, meter ID, and tamper-event logs in electricity/water meters deployed outdoors. IC Role / Device Role / Timing Role: Nonvolatile configuration and event logging EEPROM interfaced to an 8-bit MCU via I²C at 100 kHz. Use Value: 1.8V operation allows direct connection to meter's 2.0V backup rail; 100-year retention ensures data integrity over product lifetime. | Use Scenario: Saving patient calibration offsets and usage history in disposable biosensors powered by coin cells. IC Role / Device Role / Timing Role: Low-power serial EEPROM storing sensor-specific compensation data during intermittent wake cycles. Use Value: 3 µA standby current at 1.8V extends battery life; 8-byte page writes minimize active time during data commits. |
| Industrial PLC I/O Module | Automotive Body Control Unit |
Use Scenario: Holding channel-specific scaling factors and fault-history counters in modular analog input/output cards. IC Role / Device Role / Timing Role: Configuration EEPROM accessed during boot and runtime diagnostics via isolated I²C bus. Use Value: −40°C to +85°C rating matches PLC ambient specs; WP pin prevents corruption during hot-swap events. | Use Scenario: Storing seat position memory, mirror presets, and door-lock configuration in 12V vehicle subsystems. IC Role / Device Role / Timing Role: I²C EEPROM connected to LIN-to-I²C bridge MCU for user preference persistence. Use Value: 1.8V–5.5V range accommodates post-buck regulation; 1M endurance supports daily reprogramming over 10+ years. |
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, 1.7V–5.5V supply, but uses newer process; 400 kHz I²C at 1.7V; SOIC-8 package | Higher speed at lowest voltage; tighter VIL/VIH thresholds improve noise margin in high-noise automotive domains | Select when 400 kHz operation below 1.8V is required or when sourcing new-design-qualified components |
| BR24G01FJ-WE2 | Rohm 1K-bit EEPROM; 1.6V–5.5V; 1 MHz I²C; 1.5 ms typical write cycle; TSSOP-8 package | Faster write time and higher clock rate suit time-critical logging; TSSOP-8 footprint differs from SOIC-8 | Choose for faster throughput where board layout allows TSSOP-8; verify PCB pad compatibility before substitution |
Compared with AT24C01A-10SI-1.8-T, AT24C01D-SSHM-T offers enhanced low-voltage speed but identical pinout and function, while BR24G01FJ-WE2 trades SOIC-8 compatibility for faster writes and broader voltage range - requiring layout review.
Availability
AT24C01A-10SI-1.8-T is available at Aetrix Electronics and suitable for smart metering, medical wearables, industrial PLC modules, automotive body control units, and battery-powered sensor nodes requiring stable component supply across extended temperature and low-voltage operation.
Supply support for AT24C01A-10SI-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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification coverage.
The AT24C01A belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power, I²C-based nonvolatile storage.
FAQ
What is the maximum I²C clock frequency supported by AT24C01A-10SI-1.8-T at 1.8V?
The AT24C01A-10SI-1.8-T supports a maximum I²C clock frequency of 100 kHz when operating at 1.8V. This is specified in the AC Characteristics table under fSCL for 1.8V operation. Higher frequencies (up to 400 kHz) are only guaranteed at VCC ≥ 2.5V. Designers must respect this limit to ensure reliable communication in low-voltage systems using AT24C01A-10SI-1.8-T.
Does AT24C01A-10SI-1.8-T require external pull-up resistors on SDA and SCL lines?
Yes, AT24C01A-10SI-1.8-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 desired rise time. The absence of internal pull-ups means AT24C01A-10SI-1.8-T will not function correctly without properly sized external resistors.
How many devices can share the same I²C bus with AT24C01A-10SI-1.8-T?
Up to eight AT24C01A-10SI-1.8-T devices can share a single I²C bus, enabled by hard-wiring the A0, A1, and A2 address pins to VCC or GND. Each unique 3-bit combination yields a distinct 7-bit device address (1010xxx), allowing individual addressing without software arbitration. This scalability supports multi-sensor nodes or modular systems using AT24C01A-10SI-1.8-T.
What happens to AT24C01A-10SI-1.8-T during a power brown-out within the 1.8V–5.5V range?
AT24C01A-10SI-1.8-T includes internal power-on reset (POR) and write-inhibit circuitry that blocks write operations whenever VCC drops below the functional threshold (~1.5V). During brown-out, ongoing writes abort safely, and the device holds its last valid state. No data corruption occurs, and the EEPROM remains readable once VCC stabilizes - a key reliability feature confirmed in AT24C01A-10SI-1.8-T characterization.
Can AT24C01A-10SI-1.8-T be used in place of AT24C01A-10PI-1.8?
Yes, AT24C01A-10SI-1.8-T is functionally and pin-compatible with AT24C01A-10PI-1.8, differing only in packaging: "SI" denotes SOIC-8 (8S1), while "PI" denotes PDIP-8 (8P3). Both share identical electrical specs, temperature range (−40°C to +85°C), and 1.8V operation. Substitution requires only PCB footprint validation - no schematic or firmware changes are needed for AT24C01A-10SI-1.8-T replacement.
AT24C01A-10SI-1.8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
AT24C01A-10SI-1.8-T FAQ
1.How can I place an order for AT24C01A-10SI-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01A-10SI-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-10SI-1.8-T reliable?
The price and inventory of AT24C01A-10SI-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-10SI-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C01A-10SI-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01A-10SI-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01A-10SI-1.8-T?
AT24C01A-10SI-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01A-10SI-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-10SI-1.8-T?
For technical support, including AT24C01A-10SI-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-10SI-1.8-T requirements.
6.How does Aetrix verify that AT24C01A-10SI-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C01A-10SI-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-10SI-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C01A-10SI-1.8-T?
All AT24C01A-10SI-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01A-10SI-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-10SI-1.8-T part is unused and in its original packaging.
Return procedure for AT24C01A-10SI-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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