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Microchip Technology AT24C64AW-10SI-1.8
- Part No.:
- AT24C64AW-10SI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C64AW-10SI-1.8.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,744
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Product details
Overview
AT24C64AW-10SI-1.8 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 400 kHz clock rate at 1.8V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial sensor calibration storage and automotive body control modules requiring nonvolatile parameter retention across power cycles.
For engineers reviewing the AT24C64AW-10SI-1.8 datasheet, AT24C64AW-10SI-1.8 pinout, AT24C64AW-10SI-1.8 application, or AT24C64AW-10SI-1.8 equivalent, this page provides verified electrical parameters, JEDEC SOIC-8 package details, noise-suppressed I²C interface behavior, and validated alternative parts for supply continuity planning.
Technical Context
The AT24C64AW-10SI-1.8 implements a standard two-wire I²C interface with Schmitt-triggered SDA/SCL inputs for robust noise immunity, and uses open-drain bidirectional data transfer with wire-OR capability. Its internal address decoder accepts three hardware-configurable device address bits (A0–A2), enabling up to eight devices on a shared bus.
It supports byte and 32-byte page write modes with self-timed internal write cycles (max 5 ms), and includes an active-high write protect (WP) pin that disables all memory writes when pulled to VCC. Standby current is specified at 1.0 µA @ 1.8V, confirming suitability for battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8), organized as 256 pages of 32 bytes - enables efficient firmware parameter storage with minimal address overhead. |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic families and legacy 3.3V/5V microcontrollers without level shifting. |
| I²C Clock Rate | 400 kHz at 1.8V - ensures fast configuration loading in time-constrained boot sequences while maintaining signal integrity at low voltage. |
| Write Endurance | 1 million write cycles - guarantees reliable field updates for calibration data or usage counters over product lifetime. |
| Data Retention | 100 years at +25°C - ensures long-term validity of stored settings without periodic refresh or backup power. |
| Standby Current | 1.0 µA @ 1.8V - minimizes quiescent power draw in always-on sensor nodes or energy-harvesting systems. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive cabin environments without derating. |
Pinout & Package
AT24C64AW-10SI-1.8 is housed in an 8-lead JEDEC SOIC (8S1) package: 0.150" wide, gull-wing leads, 1.27 mm pitch, body dimensions 4.80–5.00 mm × 3.81–3.99 mm. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired logic levels set unique I²C slave address (0x50–0x57); floating pins are internally pulled down - simplifies multi-device bus design. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; supports wire-OR with other I²C peripherals on same bus. |
| SCL | Serial Clock Input | Positive-edge sampled input; controls timing of data transfers; Schmitt trigger ensures noise immunity on slow-rising clock edges. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC blocks all writes, including page and byte operations - prevents accidental corruption during firmware update. |
| VCC | Power Supply | Accepts 1.8V–5.5V; no separate logic supply required - reduces BOM count and layout complexity. |
| GND | Ground Reference | Common return path for all internal circuitry and I/O - must be connected before VCC to avoid latch-up. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V I²C operation at 400 kHz | Enables high-speed configuration reads in ultra-low-power systems without sacrificing timing margin or requiring external clock buffers. |
| 32-byte page write mode | Reduces write transaction count by up to 32× versus byte writes - cuts I²C bus occupancy and host CPU overhead during bulk parameter saves. |
| Schmitt-triggered SDA/SCL inputs | Rejects <100 ns noise spikes - eliminates false start/stop detection in electrically noisy automotive or industrial PCB environments. |
| Hardware write protection (WP) | Provides fail-safe memory lockdown independent of firmware state - critical for safety-critical calibration data or regulatory compliance records. |
| 100-year data retention | Eliminates need for periodic data refresh or redundant storage schemes - lowers system-level validation cost and firmware maintenance burden. |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients for temperature, pressure, and humidity sensors deployed in HVAC and process control systems. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during power-up initialization; retains values across decades of operation without battery backup. Use Value: Eliminates manual recalibration labor and field service visits; ensures consistent measurement accuracy across product lifecycle. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration profiles in vehicle door modules. IC Role / Device Role / Timing Role: I²C slave storing user-defined settings; written during button press events and read at ignition-on to restore preferences. Use Value: Enables personalized user experience without MCU RAM retention or supercapacitor support - reduces bill-of-materials cost. |
| Medical Device Configuration | Smart Energy Meter Firmware Patch Storage |
|
Use Scenario: Saving clinical mode selections, alarm thresholds, and patient-specific therapy parameters in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage accessed only after authenticated boot sequence; WP pin hardwired to prevent runtime modification. Use Value: Meets IEC 62304 software safety requirements by isolating configuration from executable code space and enabling audit-trail-capable updates. |
Use Scenario: Storing field-deployed firmware patches and metering algorithm revisions in utility-grade electricity meters operating in remote substations. IC Role / Device Role / Timing Role: Dual-role memory: holds patch binaries during OTA download and serves as persistent execution buffer during safe firmware swap. Use Value: Enables secure, rollback-capable firmware updates without requiring full flash reprogramming - minimizes outage window and field technician dispatch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95640-DWMN6TP | 4-MHz SPI interface, 1.8V–5.5V supply, 5 ms write cycle, 1M endurance - lacks I²C compatibility and hardware WP pin. | Requires SPI-capable MCU; unsuitable for existing I²C bus architectures without protocol translation. | Select only if migrating to SPI-based designs and needing higher throughput than I²C allows. |
| BR24G64FJ-WE2 | 1.7V–5.5V operation, 400 kHz I²C, 1M endurance, 100-year retention - identical pinout and function but RoHS-compliant and AEC-Q100 Grade 2 qualified. | Validated for automotive under-hood use; supports extended temperature range (-40°C to +125°C) with tighter parametric testing. | Preferred for new automotive designs requiring AEC-Q100 qualification; drop-in replacement for AT24C64AW-10SI-1.8 in most cases. |
Compared with M95640-DWMN6TP and BR24G64FJ-WE2, the AT24C64AW-10SI-1.8 offers guaranteed I²C compatibility and integrated hardware write protection in JEDEC SOIC-8, making it optimal for cost-sensitive industrial upgrades where bus topology and pin compatibility are fixed constraints.
Availability
AT24C64AW-10SI-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 obsolescence management.
Supply support for AT24C64AW-10SI-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24Cxx EEPROM family. The company specializes in microcontrollers, analog, and memory solutions for embedded control applications.
The AT24C64AW-10SI-1.8 belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems where I²C bus efficiency and voltage flexibility are critical.
FAQ
What is the maximum I²C clock frequency supported by AT24C64AW-10SI-1.8 at 1.8V?
The AT24C64AW-10SI-1.8 supports a maximum clock frequency of 400 kHz when operating at 1.8V, as confirmed in the AC Characteristics table of the official datasheet (3054N–SEEPR–2/04). This rating applies across the full industrial temperature range (-40°C to +85°C) and is not derated for low-voltage operation.
Does AT24C64AW-10SI-1.8 include built-in hardware write protection?
Yes, AT24C64AW-10SI-1.8 includes a dedicated Write Protect (WP) pin. When WP is pulled high to VCC, all write operations-including byte, page, and sequential writes-are inhibited. This hardware-level lock operates independently of firmware state and provides deterministic protection against accidental or malicious memory corruption.
What package type is used for AT24C64AW-10SI-1.8?
AT24C64AW-10SI-1.8 uses the 8-lead JEDEC SOIC (8S1) package: 0.150" wide body, gull-wing leads, 1.27 mm lead pitch, and overall dimensions of 4.80–5.00 mm × 3.81–3.99 mm. This package is footprint-compatible with industry-standard SOIC-8 footprints and supports automated surface-mount assembly.
How many devices can share the same I²C bus with AT24C64AW-10SI-1.8?
Up to eight AT24C64AW-10SI-1.8 devices can share a single I²C bus using the three hardware-configurable address pins (A0, A1, A2). Each combination of A0–A2 sets a unique 3-bit device address segment, resulting in slave addresses ranging from 0x50 to 0x57 when the base I²C address prefix is applied.
What is the write endurance and data retention specification for AT24C64AW-10SI-1.8?
The AT24C64AW-10SI-1.8 is rated for 1 million write cycles and 100 years of data retention at +25°C. These values are characterized and documented in the datasheet's "High Reliability" section and apply to the entire AT24C64A family, including the -10SI-1.8 variant.
AT24C64AW-10SI-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- 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-SOIC
AT24C64AW-10SI-1.8 FAQ
1.How can I place an order for AT24C64AW-10SI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64AW-10SI-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 AT24C64AW-10SI-1.8 reliable?
The price and inventory of AT24C64AW-10SI-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 AT24C64AW-10SI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C64AW-10SI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64AW-10SI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64AW-10SI-1.8?
AT24C64AW-10SI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64AW-10SI-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 AT24C64AW-10SI-1.8?
For technical support, including AT24C64AW-10SI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64AW-10SI-1.8 requirements.
6.How does Aetrix verify that AT24C64AW-10SI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C64AW-10SI-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 AT24C64AW-10SI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C64AW-10SI-1.8?
All AT24C64AW-10SI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64AW-10SI-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 AT24C64AW-10SI-1.8 part is unused and in its original packaging.
Return procedure for AT24C64AW-10SI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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