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Microchip Technology AT24C08AY1-10YI-2.7
- Part No.:
- AT24C08AY1-10YI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT24C08AY1-10YI-2.7.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:4,488
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Product details
Overview
AT24C08AY1-10YI-2.7 from Microchip Technology (formerly Atmel) is an 8K-bit (1024 × 8) automotive-grade serial EEPROM with 2-wire I²C interface, 2.7V to 5.5V operation, and 8-lead MAP package. It supports 400 kHz clock rate at 2.7V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention - deployed in vehicle body control modules for configuration storage.
For engineers reviewing the AT24C08AY1-10YI-2.7 datasheet, AT24C08AY1-10YI-2.7 pinout, AT24C08AY1-10YI-2.7 application, or AT24C08AY1-10YI-2.7 equivalent, key selection factors include its A2-only device addressing (A0/A1 NC), 16-byte page write capability, Schmitt-trigger inputs for noise immunity, and extended temperature support (−40°C to +85°C) in halogen-free, lead-free packaging.
Technical Context
The AT24C08AY1-10YI-2.7 implements a standard I²C-compatible 2-wire serial interface with open-drain SDA and active-high SCL, supporting both byte and 16-byte page writes. Its internal address counter enables sequential reads across memory boundaries, while acknowledge polling allows host firmware to detect write completion without fixed delays.
Device addressing uses only the A2 pin (A0 and A1 are no-connects), enabling up to two AT24C08A devices on a single bus. The WP pin provides hardware-level write protection: tied to VCC, it locks the full 8K array; tied to GND, full read/write access is enabled - a critical feature for safety-critical automotive parameter storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8192 bits (1024 words × 8 bits), organized as 64 pages of 16 bytes each - enables efficient parameter grouping and firmware update logging. |
| Supply Voltage | 2.7V to 5.5V - compatible with 3.3V and 5V automotive microcontroller I/O domains without level shifting. |
| Interface Speed | 400 kHz max at 2.7V - supports fast configuration loading in real-time control loops without bus contention. |
| Write Endurance | 1,000,000 cycles - sufficient for daily recalibration events over 10+ years of vehicle service life. |
| Data Retention | 100 years at +25°C - ensures calibration data integrity across full vehicle lifecycle and resale periods. |
| Operating Temp | −40°C to +85°C - qualified for under-hood and cabin-mounted ECUs per AEC-Q100 stress test requirements. |
| Package | 8-lead MAP (4.90 mm × 3.00 mm, non-leaded) - compact footprint for space-constrained PCB layouts in telematics and gateway modules. |
Pinout & Package
AT24C08AY1-10YI-2.7 uses an 8-lead Miniature Array Package (MAP), bottom-view layout with dual footprint compatibility. Package dimensions: 4.90 mm × 3.00 mm × 0.90 mm max height, lead pitch 0.65 mm, halogen-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Power Supply | Connects to system 3.3V or 5V rail; decoupling capacitor (100 nF) required within 5 mm for noise suppression. |
| 2 (WP) | Write Protect Input | Hardwired to VCC for full-array lock; grounded for normal operation - prevents accidental overwrites during ECU reset sequences. |
| 3 (SCL) | Serial Clock Input | Positive-edge triggered; requires external pull-up (typically 4.7 kΩ) to VCC - synchronizes all I²C transactions. |
| 4 (SDA) | Serial Data I/O | Open-drain bidirectional line; shared across multiple I²C slaves; pull-up resistor mandatory for bus arbitration. |
| 5 (A0) | No-connect | Internally unconnected; must be left floating or tied to GND/VCC - no effect on device addressing or functionality. |
| 6 (A1) | No-connect | Internally unconnected; no electrical or mechanical tie required - simplifies PCB routing in multi-device systems. |
| 7 (A2) | Device Address Input | Hardwired to GND or VCC to select one of two possible addresses (1010000x or 1010001x) on shared I²C bus. |
| 8 (GND) | Ground Reference | Primary return path for VCC and I/O; must connect to low-impedance system ground plane to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Suppresses bus noise up to 100 ns glitches on SCL/SDA - eliminates spurious start/stop detection in high-EMI engine compartments. |
| 16-byte page write mode | Reduces I²C transaction overhead by 87% vs. byte writes for multi-parameter updates - critical for fast boot-time configuration restore. |
| Self-timed write cycle | Max 5 ms duration with automatic internal timing - frees MCU resources during write; no software delay loops needed. |
| Automotive qualification | AEC-Q100 Grade 3 compliant (−40°C to +85°C), lead-free/halogen-free - meets OEM requirements for body electronics and infotainment. |
| Hardware write protection | WP pin disables all write operations when high - prevents corruption during power brownouts or firmware crashes. |
Applications
| Body Control Module (BCM) | Instrument Cluster |
|---|---|
|
Use Scenario: Storing user-configurable settings (e.g., door lock behavior, mirror position, lighting profiles) that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register bank accessed via I²C during BCM initialization and runtime updates. Use Value: Enables personalized vehicle experience without requiring battery-backed SRAM; survives 100+ years of data retention even with intermittent power. |
Use Scenario: Retaining odometer readings, service interval counters, and warning lamp history after battery disconnect. IC Role / Device Role / Timing Role: Tamper-resistant event logger synchronized to CAN message timestamps for audit-trail compliance. Use Value: Guarantees legal mileage integrity with 1M write cycles - supports 10+ years of daily updates at 300 cycles/year. |
| Telematics Control Unit (TCU) | Smart Rearview Mirror |
|
Use Scenario: Caching cellular network credentials, SIM lock status, and firmware update metadata during vehicle connectivity handshakes. IC Role / Device Role / Timing Role: Secure credential vault interfaced to host MCU via isolated I²C bus with WP pin permanently tied to VCC. Use Value: Prevents remote overwrite attacks; hardware write lock ensures credentials remain intact during OTA update failures. |
Use Scenario: Saving auto-dimming calibration offsets, ambient light sensor baselines, and display brightness preferences. IC Role / Device Role / Timing Role: Low-power configuration store accessed only during mirror power-up or manual reset. Use Value: Achieves <1 µA standby current at 2.7V - extends backup battery life beyond 5 years in always-on mirror designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C08-RMN6TP | Same 8K-bit size, 2.7–5.5V, TSSOP-8 package; supports 1 MHz I²C at 5V but only 400 kHz at 2.7V; no A2-only addressing - uses A0–A2 for full 8-device addressing. | Requires PCB layout change (TSSOP vs. MAP); lacks automotive temp grade - rated −40°C to +85°C but not AEC-Q100 qualified. | Select when higher-speed 5V operation is prioritized and AEC-Q100 is not mandated; verify WP pin behavior matches system lock logic. |
| ON Semiconductor CAT24C08HU4IGT3 | Identical 8K-bit, 2.7–5.5V, MAP-8 footprint; supports same 400 kHz @ 2.7V; A2-only addressing; AEC-Q100 Grade 2 (−40°C to +105°C). | Higher temperature rating enables use in hotter zones (e.g., near power converters); identical pinout and WP function - drop-in replacement. | Prefer for under-hood applications exceeding +85°C ambient; otherwise functionally interchangeable with AT24C08AY1-10YI-2.7 in existing designs. |
Compared with AT24C08AY1-10YI-2.7, the M24C08-RMN6TP offers faster 5V operation but lacks automotive qualification and requires package redesign, while the CAT24C08HU4IGT3 provides extended temperature range in the same MAP package - making it a direct upgrade path for thermally demanding deployments.
Availability
AT24C08AY1-10YI-2.7 is available at Aetrix Electronics and suitable for automotive body control, instrument cluster, telematics, and smart mirror applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant EEPROMs.
Supply support for AT24C08AY1-10YI-2.7 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 acquired Atmel in 2016 and maintains full product continuity, technical documentation, and automotive qualification for the AT24CxxA EEPROM family.
The AT24C08A series was designed specifically for automotive and industrial systems needing reliable, low-voltage, I²C-compatible nonvolatile storage with hardware write protection and extended temperature operation.
FAQ
What is the maximum I²C clock frequency supported by AT24C08AY1-10YI-2.7 at 2.7V?
The AT24C08AY1-10YI-2.7 supports up to 400 kHz I²C clock frequency when operated at 2.7V, as specified in the AC Characteristics table. This is confirmed for the "2.7V" version across the full industrial temperature range (−40°C to +85°C). Operation above 400 kHz is not guaranteed and may result in communication errors or data corruption.
How does the Write Protect (WP) pin function on AT24C08AY1-10YI-2.7?
On AT24C08AY1-10YI-2.7, the WP pin enables hardware write protection: when pulled high to VCC, it locks the entire 8K memory array against writes; when grounded, full read/write access is permitted. This behavior is independent of I²C commands and provides fail-safe protection during power transients or firmware faults.
Is AT24C08AY1-10YI-2.7 pin-compatible with other packages in the AT24C08A family?
No - AT24C08AY1-10YI-2.7 uses the 8Y1 MAP package with bottom-view pinout (VCC-WP-SCL-SDA-A0-A1-A2-GND), which differs electrically and mechanically from PDIP (8P3), SOIC (8S1), and TSSOP (8A2) variants. While all share identical I²C functionality and pin functions, PCB layout and soldering processes are not interchangeable.
What is the memory organization and page structure of AT24C08AY1-10YI-2.7?
AT24C08AY1-10YI-2.7 is internally organized as 1024 words × 8 bits (8K-bit), divided into 64 pages of 16 bytes each. This enables 16-byte page writes, where the lower 4 address bits auto-increment within a page, and wraparound occurs at page boundaries - optimizing burst configuration updates without host-side address management.
Does AT24C08AY1-10YI-2.7 require external pull-up resistors on SDA and SCL lines?
Yes - AT24C08AY1-10YI-2.7 has open-drain SDA and input-only SCL, requiring external pull-up resistors to VCC on both lines. Typical values are 4.7 kΩ for 400 kHz operation with bus capacitance ≤400 pF; value selection must account for total bus capacitance, number of devices, and rise time requirements per I²C specification.
AT24C08AY1-10YI-2.7 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:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 4.5 µs
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MAP (3x4.9)
AT24C08AY1-10YI-2.7 FAQ
1.How can I place an order for AT24C08AY1-10YI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C08AY1-10YI-2.7 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 AT24C08AY1-10YI-2.7 reliable?
The price and inventory of AT24C08AY1-10YI-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C08AY1-10YI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C08AY1-10YI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C08AY1-10YI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C08AY1-10YI-2.7?
AT24C08AY1-10YI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C08AY1-10YI-2.7 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 AT24C08AY1-10YI-2.7?
For technical support, including AT24C08AY1-10YI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C08AY1-10YI-2.7 requirements.
6.How does Aetrix verify that AT24C08AY1-10YI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C08AY1-10YI-2.7 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 AT24C08AY1-10YI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C08AY1-10YI-2.7?
All AT24C08AY1-10YI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C08AY1-10YI-2.7, 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 AT24C08AY1-10YI-2.7 part is unused and in its original packaging.
Return procedure for AT24C08AY1-10YI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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