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Microchip Technology AT24C64N-10SC-2.7
- Part No.:
- AT24C64N-10SC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C64N-10SC-2.7.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,376
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Product details
Overview
AT24C64N-10SC-2.7 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 2.7V to 5.5V, supports 100 kHz I²C bus speed, 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 nonvolatile parameter storage.
For engineers reviewing the AT24C64N-10SC-2.7 datasheet, AT24C64N-10SC-2.7 pinout, AT24C64N-10SC-2.7 application, or AT24C64N-10SC-2.7 equivalent, key selection criteria include supply voltage range (2.7–5.5 V), page write capability (32-byte pages), standby current (0.5 µA at 2.7 V), I²C timing compliance (100 kHz max), and JEDEC SOIC-8 package compatibility.
Technical Context
The AT24C64N-10SC-2.7 implements a two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. It uses three hardware address pins (A0–A2) to support up to eight devices on a shared bus and includes an internal address counter for sequential read operations.
Write protection is implemented via the WP pin: tied to VCC, it inhibits writes to the upper quadrant (16 Kbits); tied to GND, full memory access is enabled. The device performs self-timed internal write cycles with maximum duration of 10 ms and supports both byte and 32-byte page write modes.
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 firmware configuration storage with page-level granularity. |
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct integration into 3.3 V and 5 V systems without level-shifting. |
| I²C Bus Speed | 100 kHz maximum - compliant with standard-mode I²C, suitable for microcontroller-based host interfaces with minimal timing overhead. |
| Standby Current | 0.5 µA at VCC = 2.7 V - minimizes power draw in battery-backed or energy-constrained applications. |
| Write Endurance | 1 million write cycles - ensures long-term reliability for frequently updated calibration or logging data. |
| Data Retention | 100 years at +25°C - guarantees persistent storage integrity across product lifecycles without refresh. |
| Write Cycle Time | 10 ms maximum - defines worst-case latency before host can issue next command; supports polling via ACK. |
Pinout & Package
AT24C64N-10SC-2.7 is housed in an 8-pin JEDEC SOIC (SOIC-8, package code 8S1), 0.150" wide, with standard gull-wing lead form. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardware-selectable bit for multi-device I²C addressing; grounded or pulled high to set LSB of 7-bit slave address. |
| A1 | Device Address Input | Hardware-selectable bit for multi-device I²C addressing; determines middle bit of 7-bit slave address. |
| A2 | Device Address Input | Hardware-selectable bit for multi-device I²C addressing; determines MSB of 7-bit slave address (A2–A0 allow up to 8 devices). |
| GND | Ground Reference | System return path for VCC and signal logic; must be low-impedance to ensure noise immunity during I²C communication. |
| VCC | Power Supply | Primary supply input (2.7–5.5 V); powers internal logic, memory array, and I/O buffers. |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables writes to upper 16 Kbits; tied to GND enables full memory access. |
| SCL | Serial Clock Input | Positive-edge clock for data-in; negative-edge clock for data-out; Schmitt-triggered for robust noise rejection. |
| SDA | Serial Data I/O | Bidirectional open-drain line; requires external pull-up; supports wire-OR with other I²C devices on same bus. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables burst programming of up to 32 bytes per write cycle, reducing host CPU overhead and bus occupancy vs. byte-by-byte writes. |
| Schmitt-triggered SCL/SDA inputs | Suppresses high-frequency noise on I²C lines, eliminating false clock/data transitions in electrically noisy industrial environments. |
| Hardware write protection (WP) | Prevents accidental overwrites of critical configuration data without software intervention-no firmware dependency required. |
| 100-year data retention | Eliminates need for periodic refresh or backup power in long-lifecycle applications such as utility meters or infrastructure controllers. |
| 1 million write endurance | Supports daily reconfiguration over 27+ years, enabling use in field-upgradable systems without EEPROM wear-out concerns. |
Applications
| Industrial Sensor Calibration | Smart Meter Firmware Storage |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in programmable pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent parameter storage accessible via I²C during power-on initialization. Use Value: Enables field-deployed sensors to retain calibrated accuracy across power cycles and thermal cycling without external backup power. | Use Scenario: Holding tariff schedules, billing history, and cryptographic keys in residential electricity meters operating unattended for >10 years. IC Role / Device Role / Timing Role: Secure, long-life data vault interfaced to metering SoC via I²C; WP pin hardwired to prevent unauthorized firmware updates. Use Value: Guarantees tamper-resistant, decade-long data integrity under intermittent power and wide ambient temperature swings (-25°C to +70°C). |
| PLC Configuration Backup | Medical Device Setup Profiles |
Use Scenario: Saving ladder logic runtime parameters, I/O mapping, and alarm thresholds in compact programmable logic controllers. IC Role / Device Role / Timing Role: System configuration EEPROM accessed during boot to restore operational state after cold restart or brownout recovery. Use Value: Reduces system startup time by eliminating host-initiated parameter reload; supports hot-swap I/O module identification via stored descriptors. | Use Scenario: Storing user-adjusted therapy settings (e.g., infusion rate, dose limits) and device serialization data in portable insulin pumps. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory holding FDA-mandated audit logs and calibrated delivery parameters, accessed only during setup or diagnostics. Use Value: Meets IEC 62304 Class B software requirements for persistent data integrity and traceability across device lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C64-WMN6TP | Same 64 Kbit capacity, 100 kHz I²C, 2.5–5.5 V operation; lower standby current (1 µA typ at 2.5 V) but no 2.7 V min rating. | Preferred in 2.5 V systems; not rated for guaranteed operation at 2.7 V - unsuitable where 2.7 V brownout tolerance is required. | Select when system VCC is stable ≥2.5 V and ultra-low ISB is prioritized over 2.7 V margin. |
| BR24G64FJ-WE2 | 64 Kbit, 1.7–5.5 V operation, 400 kHz I²C; built-in error correction (ECC) and enhanced ESD (6 kV HBM). | Supports higher-speed bus and harsher ESD environments; ECC adds fault resilience for safety-critical medical/automotive use. | Select when 400 kHz throughput or automotive-grade ESD robustness (IEC 61000-4-2 Level 4) is mandatory. |
Compared with M24C64-WMN6TP and BR24G64FJ-WE2, the AT24C64N-10SC-2.7 provides verified 2.7 V minimum operation and JEDEC SOIC-8 footprint compatibility with legacy Atmel designs, making it optimal for cost-sensitive industrial upgrades requiring no PCB revision.
Availability
AT24C64N-10SC-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, smart utility meters, medical infusion pumps, and sensor calibration modules requiring stable component supply across extended product lifecycles.
Supply support for AT24C64N-10SC-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 semiconductor company specializing in microcontrollers, analog, FPGA, and memory solutions, with a focus on embedded control and connectivity.
The AT24C64N-10SC-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed for reliable, low-power nonvolatile data storage in space-constrained industrial and commercial systems.
FAQ
What is the maximum I²C clock frequency supported by the AT24C64N-10SC-2.7?
The AT24C64N-10SC-2.7 supports a maximum I²C clock frequency of 100 kHz when operating within its 2.7–5.5 V supply range. This is specified in the AC Characteristics table for the 2.7 V option and aligns with standard-mode I²C compliance. It does not support 400 kHz operation - that speed is reserved for the 5.0 V variant (e.g., AT24C64-10SC).
Does the AT24C64N-10SC-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C64N-10SC-2.7 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 1.8 kΩ to 10 kΩ depending on bus capacitance and desired rise time; the device's Schmitt-triggered inputs tolerate slow edges but rely on pull-ups for proper logic high levels.
How many devices can share the same I²C bus with the AT24C64N-10SC-2.7?
Up to eight AT24C64N-10SC-2.7 devices can share a single I²C bus using the A0, A1, and A2 address pins. Each pin can be hardwired to VCC or GND to configure a unique 3-bit hardware address, yielding 2³ = 8 distinct 7-bit slave addresses (0x50–0x57) for device selection.
What happens when the WP pin is left unconnected on the AT24C64N-10SC-2.7?
When the WP pin is left unconnected on the AT24C64N-10SC-2.7, it is internally pulled down to GND, enabling full write access to the entire 64 Kbit memory array. This default behavior ensures functional operation without external wiring but removes hardware write protection - software or system-level safeguards must then enforce data integrity.
Is the AT24C64N-10SC-2.7 compatible with the AT24C64-10SC part number?
Yes, the AT24C64N-10SC-2.7 is functionally and pin-compatible with the AT24C64-10SC, differing only in voltage rating: the "-2.7" suffix denotes guaranteed operation from 2.7 V to 5.5 V, while the base AT24C64-10SC is rated for 4.5–5.5 V. Both share identical pinout, memory map, timing, and I²C protocol - no PCB or firmware changes are needed for substitution within the 2.7–5.5 V range.
AT24C64N-10SC-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C64N-10SC-2.7 FAQ
1.How can I place an order for AT24C64N-10SC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64N-10SC-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 AT24C64N-10SC-2.7 reliable?
The price and inventory of AT24C64N-10SC-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 AT24C64N-10SC-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C64N-10SC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64N-10SC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64N-10SC-2.7?
AT24C64N-10SC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64N-10SC-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 AT24C64N-10SC-2.7?
For technical support, including AT24C64N-10SC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64N-10SC-2.7 requirements.
6.How does Aetrix verify that AT24C64N-10SC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C64N-10SC-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 AT24C64N-10SC-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C64N-10SC-2.7?
All AT24C64N-10SC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64N-10SC-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 AT24C64N-10SC-2.7 part is unused and in its original packaging.
Return procedure for AT24C64N-10SC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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