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Microchip Technology AT24C32AY1-10YU-1.8
- Part No.:
- AT24C32AY1-10YU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT24C32AY1-10YU-1.8.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:1,979
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Product details
Overview
AT24C32AY1-10YU-1.8 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) two-wire serial EEPROM optimized for ultra-low-voltage operation from 1.8V to 5.5V, featuring 32-byte page write mode, hardware write protection via WP pin, and 400 kHz I²C bus compatibility. It delivers 1 million write cycles and 100-year data retention in an 8-lead Mini-MAP (MLP 2×3 mm) package, widely used in industrial sensor calibration storage and embedded system configuration memory.
For engineers reviewing the AT24C32AY1-10YU-1.8 datasheet, AT24C32AY1-10YU-1.8 pinout, AT24C32AY1-10YU-1.8 application, or AT24C32AY1-10YU-1.8 equivalent, key selection considerations include its 1.8V minimum supply, 32-byte page write limit, Schmitt-triggered SDA/SCL inputs for noise immunity, and WP-enabled hardware data lock - all critical for battery-powered IoT nodes and automotive body control modules requiring robust nonvolatile parameter storage.
Technical Context
The AT24C32AY1-10YU-1.8 implements a standard I²C-compatible two-wire interface with open-drain SDA and edge-triggered SCL, supporting up to eight devices on one bus via A0–A2 address pins. Its internal architecture organizes memory as 128 pages of 32 bytes each, enabling partial-page writes without erasing adjacent data.
It uses proprietary internal pull-down circuitry on floating A0–A2 and WP pins, ensuring deterministic logic levels under low-capacitance PCB layouts (<3 pF coupling to VCC). Standby current is specified at 1.0 µA @ 1.8V, making it suitable for always-on systems where quiescent power must remain sub-µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for storing firmware configuration, calibration coefficients, or device serial data |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters |
| Interface Speed | 400 kHz max clock frequency - supports fast parameter updates while maintaining compatibility with legacy microcontrollers |
| Write Cycle Time | 5 ms maximum - defines minimum interval between successive write commands; impacts real-time logging latency |
| Endurance | 1 million write cycles - ensures reliable operation over 10+ years in daily-use applications like smart metering |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored settings without refresh or backup power |
| Package | 8-lead Mini-MAP (MLP 2×3 mm, 0.5 mm pitch) - compact footprint ideal for space-constrained wearables and portable medical devices |
Pinout & Package
AT24C32AY1-10YU-1.8 is housed in an 8-lead Mini-MAP (MLP 2×3 mm) package with exposed thermal pad, RoHS-compliant and halogen-free, rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Device Address Inputs | Hardwired or left floating (internally pulled down); enable up to eight devices on same I²C bus |
| SDA | Serial Data I/O | Bidirectional open-drain line; requires external pull-up; supports wire-OR with other I²C devices |
| SCL | Serial Clock Input | Positive-edge clock-in / negative-edge clock-out; Schmitt-triggered for noise immunity |
| WP | Write Protect Control | Logic-high disables all writes; floating defaults to GND (write enabled) if board coupling <3 pF |
| VCC | Power Supply | Accepts 1.8V–5.5V; powers internal logic and memory array; decoupling capacitor required |
| GND | Ground Reference | Common return path for all signals and supply; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 1.8V supply - eliminates need for voltage regulators in coin-cell or energy-harvesting designs |
| Schmitt Trigger Inputs | On SDA and SCL - suppresses EMI-induced glitches and improves signal integrity in noisy industrial environments |
| Hardware Write Protection | WP pin directly gates write enable logic - prevents accidental overwrites during firmware updates or brown-out conditions |
| Page Write Mode | 32-byte burst writes - reduces I²C transaction overhead by 97% vs. single-byte writes for block data storage |
| High Reliability | 1M write cycles + 100-year retention - validated for mission-critical applications such as automotive ECUs and industrial PLCs |
Applications
| Smart Sensor Node | Industrial HMI Panel |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain values and user-defined thresholds in a wireless temperature/humidity sensor node. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent sensor parameters accessed at boot and updated during field calibration. Use Value: Enables zero-touch deployment across thousands of units while preserving accuracy across battery replacements and firmware upgrades. | Use Scenario: Retaining operator language preference, screen brightness setting, and alarm history logs in a panel-mounted human-machine interface. IC Role / Device Role / Timing Role: Dedicated parameter EEPROM interfaced directly to the display controller MCU via I²C. Use Value: Survives full system power cycles and maintains UX consistency without relying on volatile RAM or external backup capacitors. |
| Automotive Body Controller | Medical Infusion Pump |
Use Scenario: Recording door lock actuation count, mirror position presets, and lighting profiles in a vehicle body control module. IC Role / Device Role / Timing Role: Secure configuration storage with WP pin tied to MCU-controlled GPIO for runtime write locking. Use Value: Prevents corruption during ignition transients and meets AEC-Q100 Class 2 reliability requirements for in-vehicle electronics. | Use Scenario: Storing drug library definitions, dose limits, and maintenance service intervals in a Class II medical infusion pump. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory certified for IEC 62304 compliance; write-protected during therapy delivery. Use Value: Ensures regulatory traceability of configuration changes and guarantees parameter persistence through sterilization cycles and battery swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32C-SSHM-T | Same 32K-bit capacity, 1.7V–5.5V supply, improved 100 kHz–1 MHz speed grade, enhanced ESD rating (4 kV HBM) | Recommended for new designs per Microchip's official guidance; supports faster polling and higher noise immunity | Select when designing new products requiring extended voltage margin and modern qualification standards |
| M24C32-WMN6TP | STMicroelectronics 32K I²C EEPROM; 1.8V–5.5V, 400 kHz, identical pinout and timing but different WP behavior (active-low vs. active-high) | Drop-in replacement only if WP logic inversion is accommodated in firmware or external logic | Choose for dual-sourcing flexibility where ST's qualification and supply chain advantages are prioritized |
Compared with AT24C32AY1-10YU-1.8, AT24C32C-SSHM-T offers broader voltage headroom and higher reliability certification, while M24C32-WMN6TP provides second-source assurance but requires validation of write-protect polarity handling in system firmware.
Availability
AT24C32AY1-10YU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical device configuration storage requiring stable component supply and long-term lifecycle support.
Supply support for AT24C32AY1-10YU-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 memory solutions, with broad industrial and automotive qualification capabilities.
The AT24C32 series belongs to Microchip's serial EEPROM product line, designed specifically for low-power, high-reliability nonvolatile data storage in resource-constrained embedded systems operating across wide temperature and voltage ranges.
FAQ
What is the minimum operating voltage for AT24C32AY1-10YU-1.8?
The AT24C32AY1-10YU-1.8 operates down to 1.8V, as confirmed in its DC characteristics table (VCC1 min = 1.8V). This allows direct integration with 1.8V logic families and ultra-low-power microcontrollers without level-shifting circuitry. The device remains fully functional across the entire 1.8V–5.5V range, with specified AC timing and endurance maintained at the 1.8V minimum.
Does AT24C32AY1-10YU-1.8 support page write operations?
Yes, AT24C32AY1-10YU-1.8 supports 32-byte page write mode, allowing up to 32 sequential bytes to be written in a single I²C transaction. This reduces bus overhead significantly compared to byte-wise writes. The memory is organized into 128 pages of 32 bytes each, and page boundaries are enforced - writing beyond the end of a page wraps to the start of the same page.
How does the WP pin function on AT24C32AY1-10YU-1.8?
On AT24C32AY1-10YU-1.8, the WP (Write Protect) pin disables all write operations when driven high to VCC. When grounded or left floating (with board coupling <3 pF), writes are enabled. Unlike some variants, this part does not support software write protection - WP is strictly hardware-controlled, providing deterministic, glitch-immune data security during power transitions.
What package type is used for AT24C32AY1-10YU-1.8?
AT24C32AY1-10YU-1.8 uses an 8-lead Mini-MAP (MLP 2×3 mm) package, also referenced as 8Y6 in Microchip's ordering guide. It features a 0.5 mm pitch, dual no-lead construction, and an exposed thermal pad. This compact, RoHS-compliant package supports automated assembly and offers excellent thermal performance for space-constrained applications.
Is AT24C32AY1-10YU-1.8 recommended for new designs?
No - AT24C32AY1-10YU-1.8 is explicitly marked "Not recommended for new design" in Microchip's official documentation. Engineers should migrate to the AT24C32C-SSHM-T or equivalent qualified successor, which offers improved voltage range (1.7V–5.5V), higher speed grades, and updated reliability testing while maintaining pin and functional compatibility with AT24C32AY1-10YU-1.8.
AT24C32AY1-10YU-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:
- 32Kbit
- Memory Organization:
- 4K 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)
AT24C32AY1-10YU-1.8 FAQ
1.How can I place an order for AT24C32AY1-10YU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32AY1-10YU-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 AT24C32AY1-10YU-1.8 reliable?
The price and inventory of AT24C32AY1-10YU-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 AT24C32AY1-10YU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C32AY1-10YU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32AY1-10YU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32AY1-10YU-1.8?
AT24C32AY1-10YU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32AY1-10YU-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 AT24C32AY1-10YU-1.8?
For technical support, including AT24C32AY1-10YU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32AY1-10YU-1.8 requirements.
6.How does Aetrix verify that AT24C32AY1-10YU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C32AY1-10YU-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 AT24C32AY1-10YU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C32AY1-10YU-1.8?
All AT24C32AY1-10YU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32AY1-10YU-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 AT24C32AY1-10YU-1.8 part is unused and in its original packaging.
Return procedure for AT24C32AY1-10YU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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