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Microchip Technology AT24C64N-10SI-2.5
- Part No.:
- AT24C64N-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C64N-10SI-2.5.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,877
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Product details
Overview
AT24C64N-10SI-2.5 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 2.5V to 5.5V, supports 100 kHz I²C bus speed at 2.5V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial control modules for parameter storage and calibration data backup.
For engineers reviewing the AT24C64N-10SI-2.5 datasheet, AT24C64N-10SI-2.5 pinout, AT24C64N-10SI-2.5 application, or AT24C64N-10SI-2.5 equivalent, key selection criteria include its 2.5V minimum supply, industrial temperature range (−40°C to +85°C), 8-pin SOIC package, page-write capability, and hardware write-protect functionality.
Technical Context
The AT24C64N-10SI-2.5 implements a standard two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-trigger inputs for noise immunity, and bidirectional data transfer protocol. Its internal address counter supports current-address, random-address, and sequential read modes.
It uses three hardware address pins (A0–A2) to support up to eight devices on a shared bus, and the WP pin enables hardware-level protection of the upper quadrant (16 Kbits) of memory. Device addressing follows the I²C 7-bit format with R/W bit, and acknowledge polling is supported during write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8 bits), organized as 256 pages of 32 bytes each - enables efficient block writes and firmware parameter partitioning. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with 2.5V logic systems and backward-compatible with 3.3V/5V buses without level shifting. |
| I²C Clock Frequency | 100 kHz max at 2.5V - ensures reliable timing margin in noise-prone industrial environments with minimal slew rate requirements. |
| Write Cycle Time | 10 ms maximum - defines worst-case latency before next command; supports system-level timeout handling in real-time firmware. |
| Standby Current | 0.5 µA at 2.5V - reduces power budget impact in battery-backed or energy-harvesting applications. |
| Data Retention | 100 years - guarantees long-term integrity of stored configuration, calibration, or asset ID data across product lifecycle. |
| Endurance | 1 million write cycles - supports frequent logging or dynamic parameter updates in telemetry and control nodes. |
Pinout & Package
AT24C64N-10SI-2.5 is housed in an 8-pin JEDEC SOIC (8S1) package, 0.150" wide, with gull-wing leads and standard 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardware-selectable LSB of 3-bit device address; enables multi-drop I²C bus configuration with up to 8 devices. |
| A1 | Device Address Input | Mid-bit of device address; tied high/low or left floating (internally pulled low) to configure unique I²C slave address. |
| A2 | Device Address Input | MSB of device address; determines position in 0x50–0x57 I²C address range when combined with A1/A0. |
| GND | Ground Reference | Return path for VCC and signal currents; must be low-impedance to maintain noise immunity on SDA/SCL lines. |
| VCC | Power Supply | Primary power input (2.5V–5.5V); powers internal logic, memory array, and I/O buffers; decoupling capacitor required. |
| WP | Write Protect Control | Active-high hardware lock: when tied to VCC, prevents writes to upper 16 Kbits (addresses 0x2000–0x3FFF). |
| SCL | Serial Clock Input | Positive-edge sampled clock for data-in; negative-edge sampled for data-out; requires external pull-up resistor. |
| SDA | Serial Data I/O | Bidirectional open-drain data line; shared across multiple I²C devices; requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables burst programming of up to 32 bytes per transaction, reducing I²C overhead and improving firmware update efficiency. |
| Schmitt-trigger, filtered inputs | Rejects fast transients and EMI-induced glitches on SDA/SCL, eliminating need for external RC filtering in harsh industrial settings. |
| Hardware write protection (WP) | Prevents accidental overwrites of critical calibration or security data without software intervention or MCU involvement. |
| 100-year data retention | Eliminates need for periodic refresh or backup power in unattended deployments such as remote sensors or utility meters. |
| Industrial temperature range | Validated operation from −40°C to +85°C ensures reliability in factory automation, motor drives, and outdoor infrastructure. |
Applications
| Industrial PLC Configuration Storage | Smart Meter Calibration Data Backup |
|---|---|
Use Scenario: Storing user-defined I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during boot or runtime reconfiguration. Use Value: Enables field-upgradable logic behavior without firmware reflashing; retains settings through power loss or brownout events. | Use Scenario: Preserving meter-specific calibration coefficients, tariff tables, and tamper-event logs in electricity/water/gas meters. IC Role / Device Role / Timing Role: Secure, long-life data vault with hardware write protection for regulatory compliance-critical values. Use Value: Guarantees metrological accuracy over 10+ years; WP pin prevents unauthorized modification of billing-related constants. |
| Medical Device Settings Persistence | Automotive Body Control Module (BCM) User Preferences |
Use Scenario: Saving clinician-configured alarm limits, display brightness, and language preferences in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power, fail-safe storage element interfaced to microcontroller during initialization or menu navigation. Use Value: Meets IEC 62304 safety requirements for data integrity; 0.5 µA standby current extends battery life in handheld units. | Use Scenario: Retaining driver-selected seat position, mirror angle, climate presets, and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: I²C-connected configuration memory accessed during vehicle power-up or CAN message-triggered recall. Use Value: Supports ASIL-B compatible design with 1M endurance for repeated personalization cycles over vehicle lifetime. |
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-SSHM-T | Same 64 Kbit capacity, 2.5V–5.5V supply, but in 8-pin TSSOP (8T) package; 100 kHz I²C speed; identical WP and page-write functionality. | TSSOP offers smaller footprint and better thermal performance; no PDIP/SOIC pinout compatibility. | Select when board space is constrained and reflow assembly is used; verify PCB land pattern matches 8T dimensions. |
| ON Semiconductor CAT24C64WI-GT3 | 64 Kbit I²C EEPROM, 1.7V–5.5V supply, 400 kHz max speed at ≥2.5V, same 8-pin SOIC package, but rated for industrial temp only (−40°C to +85°C). | Wider voltage range and higher speed support; slightly lower standby current (0.3 µA @ 2.5V) but same endurance and retention. | Choose for designs requiring faster I²C throughput or extended low-voltage operation down to 1.7V. |
Compared with AT24C64N-10SI-2.5, AT24C64D-SSHM-T offers identical electrical behavior in a smaller TSSOP package, while CAT24C64WI-GT3 provides broader voltage tolerance and higher bus speed-both require validation of WP pin behavior and page-write timing against system firmware.
Availability
AT24C64N-10SI-2.5 is available at Aetrix Electronics and suitable for industrial control systems, smart metering platforms, and medical diagnostics equipment requiring stable component supply, long-term data integrity, and industrial-grade temperature resilience.
Supply support for AT24C64N-10SI-2.5 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 embedded control and connectivity.
The AT24C64N-10SI-2.5 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for reliable, low-power, I²C-based configuration and calibration storage in industrial, automotive, and medical applications.
FAQ
What is the operating temperature range for AT24C64N-10SI-2.5?
The AT24C64N-10SI-2.5 is rated for industrial temperature operation from −40°C to +85°C. This range is validated per the datasheet's "Ordering Information" table, where the "-SI" suffix explicitly denotes the industrial grade. The device undergoes screening and characterization across this full range for parameters including write cycle time, standby current, and I²C timing margins.
Does AT24C64N-10SI-2.5 support 400 kHz I²C communication?
No, AT24C64N-10SI-2.5 supports up to 100 kHz I²C clock frequency when operated at 2.5V. The datasheet specifies 100 kHz compatibility for 1.8V, 2.5V, and 2.7V versions, while 400 kHz is only guaranteed for the 5.0V version (e.g., AT24C64-10PC). Using 400 kHz at 2.5V may result in timing violations or communication failures.
How many devices can share the same I²C bus with AT24C64N-10SI-2.5?
Up to eight AT24C64N-10SI-2.5 devices can share a single I²C bus using the A0, A1, and A2 address pins. These three pins form a 3-bit hardware address, allowing unique 7-bit slave addresses from 0x50 to 0x57. All pins may be hardwired or left floating (internally pulled low), enabling flexible multi-device topology without software address remapping.
What is the function of the WP pin on AT24C64N-10SI-2.5?
The WP (Write Protect) pin on AT24C64N-10SI-2.5 provides hardware-level inhibition of write operations to the upper quadrant (16 Kbits, addresses 0x2000–0x3FFF) when driven high to VCC. When tied to GND or left unconnected (internally pulled down), full memory access is enabled. This feature safeguards critical calibration or security data independent of firmware state.
What is the maximum page write size for AT24C64N-10SI-2.5?
The AT24C64N-10SI-2.5 supports a maximum page write size of 32 bytes. Memory is internally organized into 256 pages of 32 bytes each. Attempting to write more than 32 bytes in a single page-write transaction causes the address to roll over within the same page, potentially overwriting earlier data in that page.
AT24C64N-10SI-2.5 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:
- 10ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C64N-10SI-2.5 FAQ
1.How can I place an order for AT24C64N-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64N-10SI-2.5 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 AT24C64N-10SI-2.5 reliable?
The price and inventory of AT24C64N-10SI-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C64N-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C64N-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64N-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64N-10SI-2.5?
AT24C64N-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64N-10SI-2.5 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 AT24C64N-10SI-2.5?
For technical support, including AT24C64N-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64N-10SI-2.5 requirements.
6.How does Aetrix verify that AT24C64N-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C64N-10SI-2.5 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 AT24C64N-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C64N-10SI-2.5?
All AT24C64N-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64N-10SI-2.5, 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 AT24C64N-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT24C64N-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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