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Microchip Technology AT24C64A-10PU-2.7
- Part No.:
- AT24C64A-10PU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64A-10PU-2.7.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,021
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Product details
Overview
AT24C64A-10PU-2.7 from Microchip Technology (formerly Atmel) is a 64 Kbit I²C-compatible serial EEPROM with 8192 × 8-bit organization, operating from 2.7V to 5.5V, featuring 32-byte page write capability, hardware write protection via WP pin, and 1 million write cycles endurance. It serves as nonvolatile configuration storage in embedded microcontroller systems requiring reliable, low-power data retention.
For engineers reviewing the AT24C64A-10PU-2.7 datasheet, AT24C64A-10PU-2.7 pinout, AT24C64A-10PU-2.7 application, or AT24C64A-10PU-2.7 equivalent, this device supports industrial temperature range (–40°C to +85°C), delivers 400 kHz I²C bus timing compliance at 2.7V, and integrates Schmitt-trigger inputs for robust noise immunity in noisy PCB environments.
Technical Context
The AT24C64A-10PU-2.7 implements a two-wire serial interface with open-drain SDA and active-high SCL, supporting standard-mode I²C protocol up to 400 kHz across its full 2.7V–5.5V supply range. Its internal address counter enables current-address and sequential reads, while A0–A2 pins allow up to eight devices on a shared bus.
It uses a proprietary internal bias circuit for floating A0–A2 and WP pins, ensuring predictable logic-low default states without external pull-downs when board coupling is below 3 pF. Write operations are self-timed with ≤5 ms maximum cycle duration and include acknowledge polling support for host synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8-bit), organized in 256 pages of 32 bytes each - enables efficient block-level updates without full-memory erase. |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level-shifting. |
| I²C Clock Frequency | Up to 400 kHz - meets standard-mode I²C timing requirements for microcontroller-based host interfaces. |
| Write Endurance | 1 million write cycles - supports frequent calibration or logging use cases over product lifetime. |
| Data Retention | 100 years at +25°C - ensures long-term integrity of stored configuration or calibration data. |
| Standby Current | 2.0 µA at VCC = 2.7V - minimizes system power budget during sleep or idle states. |
| Page Write Capacity | 32-byte partial-page writes - reduces firmware overhead by allowing multi-byte commits per transaction. |
Pinout & Package
AT24C64A-10PU-2.7 is supplied in an 8-lead PDIP (Plastic Dual In-line Package) with 0.300" body width, RoHS-compliant lead-free finish, and industrial temperature rating (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating (internally pulled down); configure one of eight possible I²C slave addresses on shared bus. |
| SDA | Serial Data I/O | Open-drain bidirectional line - requires external pull-up; supports wire-OR with other I²C devices. |
| SCL | Serial Clock Input | Positive-edge clock input for data sampling; negative-edge for data output - defines I²C timing window. |
| WP | Write Protect Control | Logic-high disables all writes; floating defaults to GND (write enabled) if board coupling <3 pF. |
| GND | Ground Reference | Primary return path for VCC and signal currents; must be low-impedance connection to system ground plane. |
| VCC | Power Supply | 2.7V–5.5V input; decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire Serial Interface | Fully compliant with I²C standard-mode protocol - eliminates need for parallel bus routing and reduces MCU pin count. |
| Schmitt Trigger Inputs | Integrated noise filtering on SDA/SCL - rejects transients up to 50 ns, enabling reliable operation in electrically noisy industrial enclosures. |
| Hardware Write Protection | WP pin disables all memory writes when tied to VCC - prevents accidental overwrites during firmware updates or power glitches. |
| Self-Timed Write Cycle | Internal 5 ms max write completion - frees host MCU from busy-waiting; supports ACK polling for precise synchronization. |
| Low-Voltage Operation | Functional down to 2.7V supply - supports battery-backed or energy-harvesting systems where voltage sag occurs. |
Applications
| Industrial Sensor Calibration Storage | Consumer Appliance Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and sensor linearization tables in programmable logic controllers and RTUs. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via I²C during boot or maintenance mode; no timing-critical real-time interaction. Use Value: Enables field-replaceable sensor modules without reprogramming host firmware; retains calibration across power cycles and firmware upgrades. |
Use Scenario: Saving user preferences (e.g., temperature setpoints, display brightness, timer settings) in smart thermostats and washing machines. IC Role / Device Role / Timing Role: Persistent parameter store updated infrequently via MCU GPIO-controlled I²C writes; read at power-on reset. Use Value: Delivers consistent user experience across unplanned outages; withstands >1M write cycles required for daily usage over 10+ year product life. |
| Medical Device Parameter Backup | Automotive Body Control Module Settings |
Use Scenario: Archiving safety-critical operational limits and diagnostic history logs in portable infusion pumps and ECG monitors. IC Role / Device Role / Timing Role: Fail-safe backup memory accessed only during initialization or error recovery; isolated from real-time control paths. Use Value: Meets IEC 62304 Class B software requirements for data integrity; 100-year retention ensures traceability throughout device service life. |
Use Scenario: Storing seat/mirror position presets, lighting profiles, and door lock configurations in automotive BCMs. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to 3.3V CAN/LIN subsystem MCU; updated only on user command or ignition-off event. Use Value: Supports ASAM MCD-2 MC-compliant diagnostics; operates reliably across –40°C to +85°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C64C-SSHM-T | Successor generation with enhanced ESD tolerance (4 kV HBM), tighter tAA (0.1 µs min), and extended 1.7V–5.5V operation. | Recommended for new designs targeting higher reliability in high-noise automotive interiors or medical ESD zones. | Select AT24C64C-SSHM-T when upgrading for improved robustness; not pin-compatible with AT24C64A-10PU-2.7 due to different SOIC package variant (SSHM vs PU). |
| 24LC64-I/P | Microchip's legacy 64K I²C EEPROM with identical 8-lead PDIP package, 2.5V–5.5V range, and 1M endurance but lacks 2.7V-specific characterization. | Suitable for cost-sensitive industrial controls where 2.7V minimum is not required and legacy stock is available. | Choose 24LC64-I/P only if existing design validation used this part; AT24C64A-10PU-2.7 offers guaranteed 2.7V operation and updated process technology. |
Compared with AT24C64C-SSHM-T and 24LC64-I/P, the AT24C64A-10PU-2.7 provides verified 2.7V operation and industrial-grade PDIP packaging ideal for prototyping and legacy replacement, whereas AT24C64C targets next-gen reliability and 24LC64 reflects older specification margins.
Availability
AT24C64A-10PU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration storage, consumer appliance configuration memory, medical device parameter backup, and automotive body control module settings requiring stable component supply across extended production lifecycles.
Supply support for AT24C64A-10PU-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 technical and manufacturing continuity for the AT24Cxx EEPROM family. The company specializes in microcontrollers, analog, and memory solutions for embedded systems.
The AT24C64A belongs to Microchip's serial EEPROM product line, designed specifically for low-power, I²C-based nonvolatile data storage in space-constrained industrial, medical, and consumer applications where reliability and long-term data integrity are critical.
FAQ
What is the maximum I²C clock frequency supported by AT24C64A-10PU-2.7?
The AT24C64A-10PU-2.7 supports up to 400 kHz I²C clock frequency across its full 2.7V–5.5V supply range, meeting standard-mode I²C timing specifications including tLOW ≥ 1.2 µs and tHIGH ≥ 0.6 µs. This allows direct interface with most 8-bit and 32-bit microcontrollers without external clock dividers or protocol translation.
Does AT24C64A-10PU-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C64A-10PU-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 2.2 kΩ to 10 kΩ depending on bus capacitance and speed; Microchip recommends 4.7 kΩ for 400 kHz operation with ≤400 pF total bus load.
How does the write protect (WP) pin function on AT24C64A-10PU-2.7?
When the WP pin of AT24C64A-10PU-2.7 is driven high to VCC, all write operations-including byte, page, and write-enable commands-are inhibited. If left floating, it is internally pulled down to GND (enabling writes) only when capacitive coupling to VCC is below 3 pF; otherwise, a physical GND connection is recommended for deterministic behavior.
What is the memory organization of AT24C64A-10PU-2.7?
The AT24C64A-10PU-2.7 contains 64 Kbit organized as 8192 words of 8 bits each, structured into 256 pages of 32 bytes. This layout supports efficient partial-page writes and simplifies firmware implementation of wear-leveling or circular buffer schemes without requiring full-chip erasure.
Is AT24C64A-10PU-2.7 qualified for automotive applications?
No, AT24C64A-10PU-2.7 is specified for industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, Microchip recommends the AT24C64D variant, which undergoes additional stress testing and is offered in AEC-Q100 Grade 3 packages - AT24C64A-10PU-2.7 should not be deployed in safety-critical vehicle subsystems.
AT24C64A-10PU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64A-10PU-2.7 FAQ
1.How can I place an order for AT24C64A-10PU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64A-10PU-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 AT24C64A-10PU-2.7 reliable?
The price and inventory of AT24C64A-10PU-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 AT24C64A-10PU-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C64A-10PU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64A-10PU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64A-10PU-2.7?
AT24C64A-10PU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64A-10PU-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 AT24C64A-10PU-2.7?
For technical support, including AT24C64A-10PU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64A-10PU-2.7 requirements.
6.How does Aetrix verify that AT24C64A-10PU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C64A-10PU-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 AT24C64A-10PU-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C64A-10PU-2.7?
All AT24C64A-10PU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64A-10PU-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 AT24C64A-10PU-2.7 part is unused and in its original packaging.
Return procedure for AT24C64A-10PU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C64A-10PU-2.7 Tags
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