My Inquiry
My Account
Microchip Technology AT24C64AY1-10YI-2.7
- Part No.:
- AT24C64AY1-10YI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT24C64AY1-10YI-2.7.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:2,204
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT24C64AY1-10YI-2.7 from Microchip Technology (formerly Atmel) is a 64 Kbit I²C-compatible serial EEPROM organized as 8192 × 8 bits, operating from 2.7V to 5.5V, featuring 32-byte page write mode, hardware write protection via WP pin, and automotive-grade industrial temperature range (−40°C to +85°C). It is used for nonvolatile parameter storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT24C64AY1-10YI-2.7 datasheet, AT24C64AY1-10YI-2.7 pinout, AT24C64AY1-10YI-2.7 application, or AT24C64AY1-10YI-2.7 equivalent, key selection considerations include its 400 kHz I²C clock rate at 1.8V–3.6V, 5 ms max self-timed write cycle, 1 million endurance cycles, 100-year data retention, and 8-lead MAP (4.90 mm × 3.00 mm) lead-free/halogen-free package.
Technical Context
The AT24C64AY1-10YI-2.7 implements a standard two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting bidirectional data transfer and device addressing via A0–A2 pins. It uses open-drain SDA with internal pull-down biasing on floating address/write-protect pins when board coupling is below 3 pF.
It supports three read modes-current address, random, and sequential-and two write modes-byte and 32-byte page-with acknowledge polling for write completion detection. Memory reset is achieved by clocking up to 9 SCL cycles while monitoring SDA high, then issuing a start condition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8), enabling storage of firmware configuration, calibration coefficients, or event logs in space-constrained systems. |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting. |
| I²C Clock Rate | 400 kHz at 1.8V–3.6V - enables fast parameter updates in real-time control loops. |
| Write Cycle Time | Max 5 ms - defines minimum interval between successive write commands; critical for burst-write timing budgets. |
| Endurance | 1 million write cycles - supports frequent logging in industrial monitoring applications over 10+ years. |
| Data Retention | 100 years at 25°C - ensures long-term reliability of stored calibration or security keys without refresh. |
| Operating Temperature | −40°C to +85°C - qualified for under-hood automotive, industrial PLC, and outdoor IoT node deployment. |
| Package | 8-lead MAP (4.90 mm × 3.00 mm, non-leaded) - surface-mount footprint optimized for high-density PCB layouts. |
Pinout & Package
AT24C64AY1-10YI-2.7 is housed in an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, dual footprint, non-leaded, with exposed pad not electrically connected. Pin 1 index area located at top-left corner (bottom view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Device Address Inputs | Hardwired or left floating (internally pulled down if capacitive coupling <3 pF); enable up to eight devices on one I²C bus. |
| SDA | Serial Data I/O | Bidirectional open-drain line; requires external pull-up; supports wire-OR with other I²C peripherals. |
| SCL | Serial Clock Input | Positive-edge clock-in / negative-edge clock-out; Schmitt-triggered for noise immunity in noisy environments. |
| WP | Write Protect Input | Hardware lock: tied to VCC disables all writes; tied to GND enables normal operation; floating defaults to GND. |
| VCC | Power Supply | 2.7V–5.5V input; powers internal logic and memory array; decoupling capacitor required near pin. |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance connection to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte Page Write Mode | Reduces firmware overhead by allowing up to 32 bytes per transaction; avoids 8× more I²C stop/start sequences vs. byte writes. |
| Schmitt Trigger + Noise Filtering | Enables reliable operation in electrically noisy industrial settings (e.g., motor drives, power supplies) without external RC filtering. |
| Hardware Write Protection (WP) | Prevents accidental or malicious overwrites during system boot, brown-out, or firmware update - no software dependency required. |
| Self-Timed Write Cycle | Eliminates need for host MCU to manage write timing; host can poll ACK or use fixed 5 ms delay before next access. |
| Lead-Free/Halogen-Free Construction | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements for automated assembly. |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain values and runtime compensation tables for temperature, pressure, and humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during sensor initialization and periodic recalibration. Use Value: Enables field-replaceable sensors without reprogramming host MCU; retains calibration across power cycles and battery removal. | Use Scenario: Persisting seat position memory, mirror angle presets, and door lock status across ignition cycles in entry-level vehicles. IC Role / Device Role / Timing Role: Dedicated parameter storage peripheral interfaced directly to 8-bit microcontroller via I²C. Use Value: Survives 125°C under-hood thermal stress; WP pin prevents corruption during ECU reset or CAN bus surge events. |
| Smart Energy Meter | Medical Diagnostic Handheld |
Use Scenario: Recording tamper-detection timestamps, tariff schedule changes, and meter firmware version history for regulatory audit trails. IC Role / Device Role / Timing Role: Secure log buffer with write-protection enabled during normal operation to prevent unauthorized modification. Use Value: Meets IEC 62056-21 data integrity requirements; 1M endurance supports >10 years of daily timestamp writes. | Use Scenario: Storing patient-specific calibration profiles, usage counters, and last-test results in portable ultrasound or glucose analyzers. IC Role / Device Role / Timing Role: Low-power configuration store accessed only during startup and test result save operations. Use Value: 6 µA standby current at 5.5V extends battery life; 100-year retention ensures data validity over product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C64-WMN6TP | Same 64 Kbit size, 2.5V–5.5V supply, 400 kHz I²C, but uses 8-lead SOIC (8S1) instead of MAP; WP pin functionally identical. | SOIC package requires larger PCB area and lacks dual footprint compatibility with AT24C64AY1-10YI-2.7's MAP layout. | Select when SOIC is preferred for manual assembly or legacy board reuse; verify thermal derating for +85°C ambient. |
| Renesas R1EX24064ASAS0I | 64 Kbit, 1.7V–5.5V, 1 MHz I²C, 8-lead TSSOP (8A2); higher speed but different AC timing and slightly lower endurance (400k cycles). | TSSOP offers better thermal dissipation than MAP but has longer lead form; not pin-to-pin compatible with MAP footprint. | Choose for faster write throughput in new designs where 1 MHz clock and TSSOP mounting are acceptable. |
Compared with M24C64-WMN6TP and R1EX24064ASAS0I, AT24C64AY1-10YI-2.7 provides optimal trade-off of ultra-compact MAP packaging, guaranteed 1M endurance, and automotive-grade qualification - making it ideal for next-generation space- and reliability-critical embedded systems.
Availability
AT24C64AY1-10YI-2.7 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, smart energy meters, and medical diagnostic handhelds requiring stable component supply and long-term lifecycle support.
Supply support for AT24C64AY1-10YI-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 is a global provider of microcontrollers, analog, FPGA, and memory solutions, with deep expertise in embedded control and nonvolatile storage.
The AT24C64A family was designed specifically for robust, low-power, I²C-based parameter and configuration storage in automotive, industrial, and consumer applications where reliability, small footprint, and extended temperature operation are essential.
FAQ
What is the maximum I²C clock frequency supported by AT24C64AY1-10YI-2.7?
The AT24C64AY1-10YI-2.7 supports up to 400 kHz I²C clock frequency across its full 1.8V–3.6V supply range. At 4.5V–5.5V, the maximum rated clock remains 400 kHz per the AC characteristics table. This allows deterministic timing for time-critical parameter updates without violating setup/hold margins.
Does AT24C64AY1-10YI-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C64AY1-10YI-2.7 requires external pull-up resistors on both SDA and SCL lines because its SDA pin is open-drain and SCL is input-only. Typical values are 2.2 kΩ to 4.7 kΩ for 3.3V systems; value selection depends on bus capacitance and desired rise time per I²C specification.
How does the WP pin function on AT24C64AY1-10YI-2.7, and what happens if it's left unconnected?
When WP is tied to VCC, all write operations to AT24C64AY1-10YI-2.7 are inhibited; when tied to GND, writes are enabled. If left floating, the WP pin is internally pulled down to GND only if board VCC-plane capacitive coupling is below 3 pF - otherwise, Atmel recommends explicit grounding to ensure predictable behavior.
What is the memory organization of AT24C64AY1-10YI-2.7, and how does page write work?
AT24C64AY1-10YI-2.7 is organized as 256 pages of 32 bytes each (8192 × 8 bits). In page write mode, after sending the starting address, up to 32 bytes can be written in one I²C transaction. The internal address counter auto-increments lower 5 bits; crossing page boundary wraps to the start of the same page - preventing unintended overwrite of adjacent pages.
Is AT24C64AY1-10YI-2.7 qualified for automotive applications?
Yes, AT24C64AY1-10YI-2.7 is specified for industrial temperature range (−40°C to +85°C) and offered in lead-free/halogen-free construction. While not AEC-Q100 certified, its electrical specs, packaging, and qualification testing align with automotive body electronics requirements - confirmed by its use in body control modules and smart junction boxes.
AT24C64AY1-10YI-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:
- 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MAP (3x4.9)
AT24C64AY1-10YI-2.7 FAQ
1.How can I place an order for AT24C64AY1-10YI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64AY1-10YI-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 AT24C64AY1-10YI-2.7 reliable?
The price and inventory of AT24C64AY1-10YI-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 AT24C64AY1-10YI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C64AY1-10YI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64AY1-10YI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64AY1-10YI-2.7?
AT24C64AY1-10YI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64AY1-10YI-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 AT24C64AY1-10YI-2.7?
For technical support, including AT24C64AY1-10YI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64AY1-10YI-2.7 requirements.
6.How does Aetrix verify that AT24C64AY1-10YI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C64AY1-10YI-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 AT24C64AY1-10YI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C64AY1-10YI-2.7?
All AT24C64AY1-10YI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64AY1-10YI-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 AT24C64AY1-10YI-2.7 part is unused and in its original packaging.
Return procedure for AT24C64AY1-10YI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C64AY1-10YI-2.7 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
