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Microchip Technology AT24C32AY1-10YI-1.8
- Part No.:
- AT24C32AY1-10YI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT24C32AY1-10YI-1.8.pdf
- Description:
- IC EEPROM 32KBIT I2C 400KHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:1,456
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Product details
Overview
AT24C32AY1-10YI-1.8 from Microchip Technology (formerly Atmel) is a 32K-bit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 1.8V to 5.5V with 100 kHz clock rate at 1.8V, 6 µA standby current, and hardware write protection via WP pin. It is used for nonvolatile parameter storage in low-power industrial sensors and automotive body control modules.
For engineers reviewing the AT24C32AY1-10YI-1.8 datasheet, AT24C32AY1-10YI-1.8 pinout, AT24C32AY1-10YI-1.8 application, or AT24C32AY1-10YI-1.8 equivalent, key selection considerations include 1.8V operation capability, 32-byte page write mode, 1 million write endurance, 100-year data retention, and TSSOP-compatible 8Y1 MAP package footprint.
Technical Context
The AT24C32AY1-10YI-1.8 implements a two-wire I²C interface with Schmitt-triggered SDA/SCL inputs for noise immunity, supports up to eight devices on one bus via A0–A2 address pins, and uses open-drain bidirectional SDA with external pull-up. Its internal address counter enables current-address and sequential reads without retransmitting the address.
Write operations are initiated by a start condition followed by device address (with R/W bit = 0), then 16-bit word address and data byte(s); page writes accept up to 32 bytes before auto-incrementing wraps within the 32-byte page boundary. Acknowledge polling allows host firmware to detect write completion without fixed delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), enabling storage of calibration tables or configuration profiles in space-constrained designs |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic microcontrollers without level shifters |
| Max Clock Frequency | 100 kHz at 1.8V - ensures reliable timing margin under low-voltage, high-noise conditions |
| Page Write Capacity | 32 bytes per page - reduces I²C transaction overhead when updating multi-byte parameters |
| Write Endurance | 1 million cycles - suitable for logging or frequent calibration updates in industrial controllers |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored firmware settings or security keys |
| Standby Current | 6 µA max at 5.5V - minimizes battery drain in always-on IoT edge nodes |
Pinout & Package
AT24C32AY1-10YI-1.8 uses an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, non-leaded, dual-footprint compatible with SOIC/TSSOP layouts. Pin 1 is marked by index area in bottom-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or floating (internally pulled down) to select one of eight possible I²C addresses on shared bus |
| SDA | Serial Data I/O | Bidirectional open-drain line requiring external pull-up; shares bus with other I²C peripherals |
| SCL | Serial Clock Input | Master-generated clock; rising edge samples data, falling edge drives data |
| WP | Hardware Write Protect | Logic-high disables all writes - prevents accidental overwrites during power transitions or firmware faults |
| VCC | Power Supply | Accepts 1.8V–5.5V; no separate VDD/VIO rails required |
| GND | Ground Reference | Common return path for I²C signals and internal memory array |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Enables direct integration with ultra-low-power MCUs (e.g., ARM Cortex-M0+) without voltage translation |
| Schmitt Trigger Inputs | Rejects sub-50 ns noise spikes on SDA/SCL, eliminating need for external RC filtering in noisy automotive environments |
| 32-Byte Page Write | Reduces I²C bus occupancy by >75% vs. byte-wise writes when storing sensor calibration matrices |
| Self-Timed Write Cycle | Fixed 5 ms internal erase/write completes autonomously - host can poll ACK instead of using blind delays |
| Automotive Grade Temp Range | Rated for -40°C to +85°C operation - qualified for under-hood and cabin-mounted ECUs per AEC-Q100 Class 2 |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and runtime temperature compensation tables in smart pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at power-up and during field recalibration via I²C; no timing-critical access window. Use Value: Eliminates need for external calibration EEPROM or MCU flash wear-leveling routines, reducing BOM count and firmware complexity. | Use Scenario: Retaining seat position memory, mirror fold/unfold settings, and door lock configuration across ignition cycles in entry-level vehicles. IC Role / Device Role / Timing Role: Dedicated parameter EEPROM interfaced to 8-bit body controller MCU; WP pin tied to ignition-sensed VCC for automatic write lock during power-down. Use Value: Guarantees setting persistence through 10+ year vehicle lifetime with zero risk of corruption during battery disconnect events. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Logging dose history, alarm thresholds, and user-defined therapy profiles with tamper-resistant storage requirements. IC Role / Device Role / Timing Role: Secure configuration and audit log storage; WP pin controlled by safety monitor IC to disable writes during active delivery. Use Value: Meets IEC 62304 Class C software safety requirements by preventing unauthorized parameter modification during operation. | Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event timestamps in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: High-reliability data logger with 1M write cycle endurance - withstands daily billing data commits for >27 years. Use Value: Avoids premature field failure due to EEPROM wear-out, eliminating costly truck rolls for meter replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-WMN6TP | 32K SPI interface, 2.5–5.5V supply only, no 1.8V support; 20 MHz max clock | Requires SPI-capable MCU; incompatible with I²C-only systems; higher speed but no low-voltage advantage | Select only if existing design uses SPI bus and operates ≥2.5V - not drop-in for AT24C32AY1-10YI-1.8's I²C/1.8V use case |
| BR24G32FJ-3GE2 | 32K I²C EEPROM, 1.6–5.5V range, 400 kHz @ 1.8V, 1.2 mm × 1.0 mm DFN8 package | Smaller footprint and faster clock, but lacks automotive qualification and has lower write endurance (400k cycles) | Preferred for ultra-compact portable devices where size trumps automotive reliability; not recommended for under-hood use |
Compared with M95320-WMN6TP and BR24G32FJ-3GE2, the AT24C32AY1-10YI-1.8 uniquely combines 1.8V I²C operation, AEC-Q100-compliant temperature range, and 1M write endurance in a surface-mount MAP package - making it optimal for cost-sensitive, automotive-grade, low-power embedded systems requiring guaranteed long-term data integrity.
Availability
AT24C32AY1-10YI-1.8 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for AT24C32AY1-10YI-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 memory solutions, with broad industrial and automotive qualification capabilities.
The AT24C32A family was designed specifically for robust, low-voltage nonvolatile data storage in resource-constrained embedded systems - emphasizing I²C compatibility, extended temperature operation, and high endurance for mission-critical parameter retention.
FAQ
What is the maximum I²C clock frequency supported by AT24C32AY1-10YI-1.8 at 1.8V?
The AT24C32AY1-10YI-1.8 supports a maximum clock frequency of 100 kHz when operated at 1.8V, as specified in the AC Characteristics table. This ensures timing margin compliance under low-voltage, high-noise conditions typical in battery-powered or automotive applications. Higher frequencies (e.g., 400 kHz) require VCC ≥ 2.5V and are not guaranteed at 1.8V.
Does AT24C32AY1-10YI-1.8 support partial page writes?
Yes, AT24C32AY1-10YI-1.8 supports partial page writes: up to 32 bytes may be written in a single page-write transaction, and the internal address counter automatically increments within the 32-byte page boundary. If more than 32 bytes are sent, the address rolls over to the start of the same page, overwriting earlier data - enabling flexible multi-byte updates without full-page erasure.
How is hardware write protection implemented on AT24C32AY1-10YI-1.8?
Hardware write protection on AT24C32AY1-10YI-1.8 is controlled by the WP (Write Protect) pin: when WP is driven high to VCC, all write operations (byte and page) are inhibited; when WP is grounded, normal writes are enabled. If left floating, WP is internally pulled down - defaulting to writable mode - though Microchip recommends hardwiring for deterministic behavior.
What package type does AT24C32AY1-10YI-1.8 use, and is it compatible with standard SOIC footprints?
AT24C32AY1-10YI-1.8 uses the 8Y1 Miniature Array Package (MAP), measuring 4.90 mm × 3.00 mm with non-leaded terminations. It features dual footprint compatibility - its pad layout matches both JEDEC SOIC (8S1) and TSSOP (8A2) land patterns - allowing PCB reuse across multiple package variants without redesign.
What is the data retention specification for AT24C32AY1-10YI-1.8, and under what conditions is it guaranteed?
The AT24C32AY1-10YI-1.8 guarantees 100 years of data retention at +25°C ambient temperature, as characterized per JEDEC standards. Retention time decreases with elevated temperature (e.g., ~10 years at +85°C), but the device maintains full functionality across its rated industrial temperature range (-40°C to +85°C) with no data loss during operation.
AT24C32AY1-10YI-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:
- 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)
AT24C32AY1-10YI-1.8 FAQ
1.How can I place an order for AT24C32AY1-10YI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32AY1-10YI-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 AT24C32AY1-10YI-1.8 reliable?
The price and inventory of AT24C32AY1-10YI-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 AT24C32AY1-10YI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C32AY1-10YI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32AY1-10YI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32AY1-10YI-1.8?
AT24C32AY1-10YI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32AY1-10YI-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 AT24C32AY1-10YI-1.8?
For technical support, including AT24C32AY1-10YI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32AY1-10YI-1.8 requirements.
6.How does Aetrix verify that AT24C32AY1-10YI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C32AY1-10YI-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 AT24C32AY1-10YI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C32AY1-10YI-1.8?
All AT24C32AY1-10YI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32AY1-10YI-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 AT24C32AY1-10YI-1.8 part is unused and in its original packaging.
Return procedure for AT24C32AY1-10YI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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