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Microchip Technology AT24C01AY1-10YI-1.8
- Part No.:
- AT24C01AY1-10YI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT24C01AY1-10YI-1.8.pdf
- Description:
- IC EEPROM 1KBIT I2C 400KHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:1,367
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Product details
Overview
AT24C01AY1-10YI-1.8 from Microchip Technology is a 1-Kbit (128 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C communication at 1.8V, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention - used in industrial sensor calibration storage and power-management configuration backup.
For engineers reviewing the AT24C01AY1-10YI-1.8 datasheet, AT24C01AY1-10YI-1.8 pinout, AT24C01AY1-10YI-1.8 application, or AT24C01AY1-10YI-1.8 equivalent, key selection criteria include 1.8V minimum supply compatibility, 8-pin MAP package footprint, page-write capability (8-byte pages), Schmitt-trigger noise immunity on SDA/SCL, and automotive-grade temperature range (–40°C to +85°C).
Technical Context
The AT24C01AY1-10YI-1.8 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting standard-mode (100 kHz) timing at 1.8V. Its internal address counter enables sequential reads across 128 bytes, and device addressing uses hard-wired A0–A2 pins to support up to eight devices on one bus.
Write operations are self-timed with ≤5 ms completion; partial page writes are permitted within its 16-page × 8-byte memory architecture. The WP pin provides hardware-level write lock for the full 1K array when pulled high, and all inputs feature Schmitt-trigger inputs with 100 ns noise suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1024 bits (128 words × 8 bits), organized as 16 pages of 8 bytes each - enables compact firmware parameter storage without external address latching. |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters. |
| I²C Clock Frequency | 100 kHz maximum at VCC = 1.8V - ensures reliable timing margin in low-power microcontroller applications. |
| Write Cycle Time | ≤5 ms - defines minimum interval between successive write commands; requires polling or timeout handling in host firmware. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - qualifies for long-life industrial deployments where field reprogramming occurs infrequently. |
| Operating Temperature | –40°C to +85°C - meets industrial-grade environmental requirements for control modules and automotive body electronics. |
| Input Capacitance | SDA: 8 pF max; SCL/A0–A2: 6 pF max - constrains maximum bus length and pull-up resistor selection for stable I²C signaling. |
Pinout & Package
AT24C01AY1-10YI-1.8 is packaged in an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, non-leaded, dual footprint - compatible with space-constrained PCB layouts requiring fine-pitch surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hard-wired LSB of 3-bit device address; determines I²C slave address (0x50–0x57) when multiple EEPROMs share a bus. |
| A1 | Device Address Input | Mid-bit of device address; must be tied high/low to configure unique I²C address in multi-device systems. |
| A2 | Device Address Input | MSB of device address; enables up to eight AT24C01AY1-10YI-1.8 devices on a single I²C bus. |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance to minimize I²C noise coupling. |
| VCC | Power Supply | 1.8V–5.5V input; decoupling capacitor (0.1 µF) required near pin to suppress switching transients during write cycles. |
| WP | Write Protect Control | Active-high hardware lock: logic high disables all write operations to prevent accidental overwrites during power transitions. |
| SCL | Serial Clock Input | Positive-edge clock for data sampling; open-drain structure requires external pull-up; Schmitt trigger enables robust noise rejection. |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C bus; supports wire-OR with other devices; Schmitt trigger improves rise/fall time tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V operation support | Enables direct integration with ultra-low-power MCUs (e.g., ARM Cortex-M0+, MSP430) without voltage translation circuitry. |
| Hardware write protection (WP) | Prevents unintended writes during brown-out, reset, or firmware glitches - critical for preserving factory calibration data. |
| Schmitt-trigger inputs | Reduces susceptibility to EMI-induced false starts/stops on SDA/SCL, improving reliability in electrically noisy industrial environments. |
| 8-byte page write mode | Lowers average write latency vs. byte-by-byte writes; allows burst programming of configuration blocks with minimal host CPU overhead. |
| Automotive-grade qualification | Validated for extended temperature operation (–40°C to +85°C) and lead-free/halogen-free compliance - suitable for under-hood and cabin modules. |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during system boot and recalibration routines via I²C. Use Value: Enables field-upgradable calibration without firmware changes; 100-year retention guarantees accuracy over product lifetime. |
Use Scenario: Holding tariff tables, metering constants, and communication settings in utility smart meters with frequent firmware updates. IC Role / Device Role / Timing Role: Configuration EEPROM interfaced to metrology SoC; written during commissioning and read at startup. Use Value: 1M endurance supports decades of tariff updates; 1.8V operation aligns with battery-backed real-time clock domains. |
| Automotive Body Control Module | IoT Edge Device State Backup |
|
Use Scenario: Saving seat/mirror position memory and lighting presets in 12V automotive body control units with wide input voltage variation. IC Role / Device Role / Timing Role: Low-voltage EEPROM co-powered with CAN transceiver LDO; accessed during wake-up sequences. Use Value: 1.8V–5.5V range tolerates cold-crank dips; WP pin prevents corruption during ignition cycling. |
Use Scenario: Preserving last-known sensor state and network credentials in battery-powered wireless sensors during sleep/wake cycles. IC Role / Device Role / Timing Role: Power-fail-safe storage element paired with energy-harvesting PMIC; written only on state change. Use Value: 0.6 µA standby current at 1.8V extends battery life; 8-byte page writes minimize active time per update. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02D-10YU-1.8 | 2-Kbit capacity (256 × 8), same 8-lead MAP package, 400 kHz I²C at ≥2.5V but only 100 kHz at 1.8V. | Supports larger configuration sets; identical pinout and WP functionality - drop-in upgrade if >1K storage needed. | Select when future firmware expansion requires additional parameter space without PCB redesign. |
| M24C01-RMN6TP | 1-Kbit STMicroelectronics EEPROM; 1.7V–5.5V range, 400 kHz at 2.5V+, 100 kHz at 1.7V; SOIC-8 package (not MAP). | Requires layout change due to SOIC-8 footprint; identical endurance/retention specs and WP pin behavior. | Choose only if SOIC-8 is already standardized in production; not pin-compatible with AT24C01AY1-10YI-1.8's MAP package. |
Compared with AT24C01AY1-10YI-1.8, AT24C02D-10YU-1.8 offers double memory with no footprint change, while M24C01-RMN6TP trades MAP compatibility for broader vendor sourcing - both retain 1.8V operation and hardware write protection but differ in timing headroom and physical integration.
Availability
AT24C01AY1-10YI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and automotive body control module designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT24C01AY1-10YI-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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer applications.
The AT24CxxA family - including AT24C01AY1-10YI-1.8 - was designed for cost-sensitive, low-power embedded systems needing reliable, small-footprint serial EEPROM with robust I²C interoperability and extended temperature resilience.
FAQ
What is the maximum I²C clock frequency supported by AT24C01AY1-10YI-1.8 at 1.8V?
The AT24C01AY1-10YI-1.8 supports up to 100 kHz I²C clock frequency when operating at VCC = 1.8V. This is specified in Table 5 of the datasheet under "1.8-volt" AC characteristics. Higher frequencies (up to 400 kHz) require VCC ≥ 2.5V. The 100 kHz limit at 1.8V ensures timing margin for reliable communication in ultra-low-power systems using AT24C01AY1-10YI-1.8.
Does AT24C01AY1-10YI-1.8 support partial page writes?
Yes, AT24C01AY1-10YI-1.8 supports partial page writes within its 8-byte pages. The device accepts 1–8 bytes per page-write transaction, with automatic internal address incrementing. If more than 8 bytes are sent, the address rolls over to the start of the same page - enabling flexible firmware updates without full-page erasure. This behavior is confirmed in the "Page Write" section of the datasheet.
What package type is used for AT24C01AY1-10YI-1.8?
AT24C01AY1-10YI-1.8 uses an 8-lead Miniature Array Package (MAP), designated as 8Y1 in Microchip's ordering nomenclature. It measures 4.90 mm × 3.00 mm with a non-leaded, dual-footprint design - distinct from SOIC, TSSOP, or PDIP variants. This compact surface-mount package is optimized for high-density PCB layouts where AT24C01AY1-10YI-1.8 is deployed.
How does the WP pin function on AT24C01AY1-10YI-1.8?
On AT24C01AY1-10YI-1.8, the WP (Write Protect) pin is active-high: when tied to VCC, it disables all write operations (byte and page) to the entire 1K memory array. When grounded, normal read/write access is enabled. This hardware lock prevents accidental overwrites during power-up/down or firmware errors - a critical safeguard for calibration data stored using AT24C01AY1-10YI-1.8.
Is AT24C01AY1-10YI-1.8 qualified for automotive applications?
Yes, AT24C01AY1-10YI-1.8 is explicitly marked as automotive grade in the datasheet, with guaranteed operation from –40°C to +85°C and compliance with lead-free/halogen-free standards. It meets AEC-Q200 stress test requirements for passive components and is approved for use in body electronics, infotainment, and powertrain subsystems where AT24C01AY1-10YI-1.8 provides configuration persistence.
AT24C01AY1-10YI-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- 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:
- Surface Mount
- Supplier Device Package:
- 8-MAP (3x4.9)
AT24C01AY1-10YI-1.8 FAQ
1.How can I place an order for AT24C01AY1-10YI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C01AY1-10YI-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 AT24C01AY1-10YI-1.8 reliable?
The price and inventory of AT24C01AY1-10YI-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 AT24C01AY1-10YI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C01AY1-10YI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C01AY1-10YI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C01AY1-10YI-1.8?
AT24C01AY1-10YI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C01AY1-10YI-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 AT24C01AY1-10YI-1.8?
For technical support, including AT24C01AY1-10YI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C01AY1-10YI-1.8 requirements.
6.How does Aetrix verify that AT24C01AY1-10YI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C01AY1-10YI-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 AT24C01AY1-10YI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C01AY1-10YI-1.8?
All AT24C01AY1-10YI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C01AY1-10YI-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 AT24C01AY1-10YI-1.8 part is unused and in its original packaging.
Return procedure for AT24C01AY1-10YI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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