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Microchip Technology AT24C64AY1-10YI-1.8
- Part No.:
- AT24C64AY1-10YI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT24C64AY1-10YI-1.8.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:3,097
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Product details
Overview
AT24C64AY1-10YI-1.8 from Microchip Technology (formerly Atmel) is a 64 Kbit I²C-compatible serial EEPROM organized as 8192 × 8 bits, operating from 1.8V to 5.5V, featuring 400 kHz clock rate at 1.8V, hardware write protection via WP pin, and 32-byte page write capability. It is used for nonvolatile parameter storage in automotive control modules, industrial sensor nodes, and embedded system configuration memory.
For engineers reviewing the AT24C64AY1-10YI-1.8 datasheet, AT24C64AY1-10YI-1.8 pinout, AT24C64AY1-10YI-1.8 application, or AT24C64AY1-10YI-1.8 equivalent, key selection considerations include its 1.8V minimum supply, TSSOP-compatible MAP package (8Y1), automotive-grade temperature range (–40°C to +85°C), and hardware write-protect functionality.
Technical Context
The AT24C64AY1-10YI-1.8 implements a standard two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. Its internal address decoder supports up to eight devices on a shared bus using A0–A2 pins.
It uses a cascaded page architecture of 256 pages × 32 bytes, enabling partial-page writes and supporting current-address, random-address, and sequential read modes. Write operations are self-timed with a maximum 5 ms cycle time and include acknowledge polling for host synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 65,536 bits (8192 × 8), sufficient for firmware calibration tables or device identity data. |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic systems without level shifting. |
| I²C Clock Rate | 400 kHz at 1.8V - supports high-speed configuration loading in power-constrained applications. |
| Write Cycle Time | Max 5 ms - defines worst-case latency before next command can be issued after a write. |
| Endurance | 1 million write cycles - ensures reliable operation over 10+ years in logging or counter applications. |
| Data Retention | 100 years at 25°C - guarantees long-term integrity of stored calibration or security keys. |
| Operating Temperature | –40°C to +85°C - qualified for under-hood automotive and industrial ambient environments. |
| Package | 8-lead MAP (8Y1), 4.90 mm × 3.00 mm - surface-mount footprint compatible with space-constrained PCB layouts. |
Pinout & Package
AT24C64AY1-10YI-1.8 is housed in an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, non-leaded, dual-footprint compatible with TSSOP-8 layouts. Pin 1 is marked by an index area in the top-left corner of the package bottom view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or floating to select one of eight possible I²C addresses (0x50–0x57); internally pulled down if unconnected. |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up; shares bus with other I²C devices via wire-OR. |
| SCL | Serial Clock Input | Positive-edge sampled input with Schmitt trigger for robust timing in noisy environments. |
| WP | Write Protect Control | Hardware lock: tied to VCC disables all writes; tied to GND enables full read/write access. |
| VCC | Power Supply | Accepts 1.8V–5.5V; supports mixed-voltage system integration without regulators. |
| GND | Ground Reference | Common return path for all internal circuitry and I/O signaling. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation | Enables direct connection to ultra-low-power microcontrollers and SoCs without voltage translation. |
| Hardware Write Protection | Prevents accidental or malicious firmware corruption during field updates or brown-out conditions. |
| 32-Byte Page Write | Reduces I²C transaction overhead versus byte-write mode, improving configuration write throughput by up to 32×. |
| Automotive Grade Qualification | Meets AEC-Q100 stress test requirements for reliability in safety-critical vehicle subsystems. |
| Noise-Suppressed Inputs | Schmitt-triggered SCL and filtered SDA reject >100 ns glitches, eliminating spurious bus events in EMI-heavy environments. |
Applications
| Automotive Body Control Module | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles across ignition cycles in a vehicle body control unit. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via I²C during boot and runtime; retains data through 12V battery disconnect. Use Value: Enables personalized user settings persistence without backup capacitors or supercapacitors. | Use Scenario: Holding factory-calibrated offset/gain coefficients for analog temperature and pressure sensors in a programmable transmitter. IC Role / Device Role / Timing Role: Read-once-at-boot memory mapped into MCU's configuration initialization sequence. Use Value: Eliminates need for external calibration EEPROM programming fixtures during manufacturing. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Parameters |
Use Scenario: Securing drug dosage limits, alarm thresholds, and operator access levels in Class II medical equipment. IC Role / Device Role / Timing Role: Secure parameter store with WP pin hardwired to prevent runtime modification during therapy delivery. Use Value: Supports FDA-required traceability and tamper resistance for critical operational parameters. | Use Scenario: Storing tariff schedules, metering constants, and communication credentials in utility-grade smart meters. IC Role / Device Role / Timing Role: Field-updatable configuration memory accessed over isolated RS-485/I²C bridge during firmware upgrades. Use Value: Allows remote reconfiguration of billing logic without physical 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 |
|---|---|---|---|
| Microchip AT24C64D-MAHM-T | Same 64Kbit capacity, 1.7V–5.5V supply, but in 8-lead UDFN (2×3 mm); no WP pin - write protection only via software lock bits. | Lacks hardware WP; requires firmware-level access control instead of board-level pin strapping. | Select when board space is constrained and software-managed protection suffices. |
| STMicroelectronics M24C64-WMN6TP | 64Kbit I²C EEPROM, 1.8V–5.5V, 400 kHz @ 1.8V, but in 8-lead SOIC (8S1); includes dedicated WP pin and same endurance/retention specs. | SOIC package requires larger PCB area than MAP; identical functional behavior and pinout mapping for A0–A2, SDA, SCL, WP, VCC, GND. | Select when legacy SOIC layout compatibility or distributor stock availability drives choice. |
Compared with AT24C64AY1-10YI-1.8, the AT24C64D-MAHM-T trades hardware write protection for smaller footprint, while the M24C64-WMN6TP offers identical functionality in a larger SOIC package - both require validation of WP implementation and thermal derating in automotive ambient conditions.
Availability
AT24C64AY1-10YI-1.8 is available at Aetrix Electronics and suitable for automotive infotainment head units, industrial PLC I/O modules, and medical diagnostic equipment requiring stable component supply across extended product lifecycles.
Supply support for AT24C64AY1-10YI-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, with a focus on reliability and long-term product support.
The AT24C64 series belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, low-power, and automotive-qualified nonvolatile data storage in resource-constrained embedded systems.
FAQ
What is the minimum operating voltage for AT24C64AY1-10YI-1.8?
The AT24C64AY1-10YI-1.8 operates down to 1.8V, making it compatible with modern ultra-low-power microcontrollers and SoCs that lack 3.3V or 5V rails. This specification is confirmed in the DC Characteristics table under VCC1, and applies across the full industrial temperature range (–40°C to +85°C). The AT24C64AY1-10YI-1.8 maintains full 400 kHz I²C functionality at this voltage.
Does AT24C64AY1-10YI-1.8 support hardware write protection?
Yes, AT24C64AY1-10YI-1.8 includes a dedicated Write Protect (WP) pin that, when tied to VCC, disables all write operations to the entire memory array. When WP is grounded, full read/write access is enabled. This hardware-level protection is independent of I²C commands and remains active during power transitions - a key feature distinguishing AT24C64AY1-10YI-1.8 from software-only protected EEPROMs.
What package type is used for AT24C64AY1-10YI-1.8?
AT24C64AY1-10YI-1.8 uses an 8-lead Miniature Array Package (MAP), designated as 8Y1, measuring 4.90 mm × 3.00 mm with a non-leaded, dual-footprint design compatible with TSSOP-8 land patterns. This compact surface-mount package supports high-density PCB layouts and meets lead-free/halogen-free requirements per the ordering code suffix "-10YI-1.8".
How many devices can share the same I²C bus with AT24C64AY1-10YI-1.8?
Up to eight AT24C64AY1-10YI-1.8 devices can share a single I²C bus using the three hardware address pins A0, A1, and A2. Each combination of these pins sets a unique 3-bit device address, resulting in I²C addresses from 0x50 to 0x57. The AT24C64AY1-10YI-1.8 datasheet confirms this cascadable architecture in the Device Addressing section.
What is the maximum write cycle time for AT24C64AY1-10YI-1.8?
The maximum write cycle time for AT24C64AY1-10YI-1.8 is 5 ms, as specified in the AC Characteristics table under tWR for the "A" process version (indicated by the "A" marking on the package). This self-timed internal operation completes before the device responds to subsequent I²C commands, and acknowledge polling can be used to detect completion without fixed delays.
AT24C64AY1-10YI-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:
- 64Kbit
- Memory Organization:
- 8K 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)
AT24C64AY1-10YI-1.8 FAQ
1.How can I place an order for AT24C64AY1-10YI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64AY1-10YI-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 AT24C64AY1-10YI-1.8 reliable?
The price and inventory of AT24C64AY1-10YI-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 AT24C64AY1-10YI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C64AY1-10YI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64AY1-10YI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64AY1-10YI-1.8?
AT24C64AY1-10YI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64AY1-10YI-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 AT24C64AY1-10YI-1.8?
For technical support, including AT24C64AY1-10YI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64AY1-10YI-1.8 requirements.
6.How does Aetrix verify that AT24C64AY1-10YI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C64AY1-10YI-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 AT24C64AY1-10YI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C64AY1-10YI-1.8?
All AT24C64AY1-10YI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64AY1-10YI-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 AT24C64AY1-10YI-1.8 part is unused and in its original packaging.
Return procedure for AT24C64AY1-10YI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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