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Microchip Technology AT24C64A-10PI-2.7
- Part No.:
- AT24C64A-10PI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64A-10PI-2.7.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,448
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Product details
Overview
AT24C64A-10PI-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 400 kHz clock rate at 1.8V–3.6V, hardware write protection via WP pin, and 32-byte page write mode. It is used in industrial control systems for storing calibration data, configuration settings, and firmware parameters.
For engineers reviewing the AT24C64A-10PI-2.7 datasheet, AT24C64A-10PI-2.7 pinout, AT24C64A-10PI-2.7 application, or AT24C64A-10PI-2.7 equivalent, key selection considerations include voltage range compatibility (2.7V–5.5V), 400 kHz I²C timing at low VCC, WP-driven hardware write lock, endurance of 1 million cycles, and JEDEC PDIP-8 packaging with industrial temperature range (−40°C to +85°C).
Technical Context
The AT24C64A-10PI-2.7 implements a two-wire (I²C) serial interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. It supports cascading up to eight devices on a single bus using three hardware address pins (A0–A2), enabling flexible multi-device memory expansion without additional address decoding logic.
Its internal architecture features 256 pages of 32 bytes each, with automatic address incrementing during page writes and wraparound behavior at page boundaries. The device enters low-power standby mode after STOP condition receipt and supports acknowledge polling to detect write cycle completion without fixed delay timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 65,536 bits (8192 × 8), sufficient for storing full device configuration tables or multiple sensor calibration profiles. |
| 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 embedded systems. |
| Page Write Capacity | 32-byte page write - reduces I²C transaction overhead by up to 32× versus byte-write for bulk data storage. |
| Write Endurance | 1 million write cycles - supports frequent field-updatable settings in industrial logging applications. |
| Data Retention | 100 years at 25°C - ensures long-term reliability of stored calibration or security keys across product lifetime. |
| Standby Current | 2.0 µA at 2.7V - minimizes power draw in battery-backed or energy-constrained systems. |
| Operating Temperature | −40°C to +85°C - certified for use in industrial automation, automotive body electronics, and outdoor equipment. |
Pinout & Package
AT24C64A-10PI-2.7 is housed in an 8-lead JEDEC PDIP package (0.300" wide), suitable for through-hole prototyping and legacy industrial PCBs. Pin 1 is marked by a notch or dot; the package is lead-free and halogen-free per ordering option.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware Device Address Inputs | Set unique I²C slave address (0x50–0x57); floating pins are internally pulled down, enabling simple 1–8 device bus scaling. |
| SDA | Serial Data I/O (Open-Drain) | Bidirectional data line shared across I²C bus; requires external pull-up resistor (typically 2.2–10 kΩ). |
| SCL | Serial Clock Input | Master-generated clock synchronizing all read/write transfers; accepts standard I²C timing waveforms. |
| WP | Hardware Write Protect | Active-high signal: tied to VCC to lock entire memory against accidental writes; tied to GND for normal operation. |
| VCC | Power Supply | 2.7V–5.5V input; decoupling capacitor (0.1 µF ceramic) required near pin for noise immunity. |
| GND | Ground Reference | System ground return path; must be low-impedance and co-located with VCC decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| 400 kHz I²C interface at 1.8V | Enables high-speed configuration loading even in ultra-low-voltage microcontroller systems (e.g., MSP430, nRF52). |
| 32-byte page write with partial-page support | Allows efficient storage of variable-length records (e.g., 12-byte sensor offsets + 4-byte timestamps) without overwriting adjacent data. |
| Self-timed 5 ms max write cycle | Eliminates need for precise software delays; allows host MCU to poll ACK instead of hard-coded wait states. |
| Schmitt-trigger & noise-filtered inputs | Rejects >100 ns glitches on SDA/SCL, improving robustness in electrically noisy factory-floor environments. |
| Hardware write protect (WP pin) | Prevents firmware corruption during brown-out, reset, or ESD events - critical for safety-critical parameter storage. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers deployed in manufacturing lines. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during boot and runtime reconfiguration. Use Value: Enables field-upgradable control logic without firmware reflashing; 1M endurance supports daily recalibration over 10+ years. |
Use Scenario: Holding sensor-specific gain/offset coefficients and regulatory compliance logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for FDA-required traceability data with hardware write lock. Use Value: WP pin prevents unauthorized modification during device servicing; 100-year retention satisfies medical device archival requirements. |
| Automotive Body Control Module | Smart Energy Meter Firmware Settings |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in 12V automotive ECUs. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 3.3V microcontroller I²C peripheral. Use Value: 2.7V operation ensures reliable writes during cold-crank (battery dip to 6–9V); −40°C to +85°C rating matches under-hood thermal profile. |
Use Scenario: Storing tariff schedules, meter ID, and cryptographic keys in utility-grade electricity meters with 10+ year field life. IC Role / Device Role / Timing Role: Tamper-evident nonvolatile memory supporting DLMS/COSEM protocol parameter persistence. Use Value: Lead-free/halogen-free PDIP package meets RoHS/REACH; 100-year data retention eliminates periodic data migration. |
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 64Kbit size, 2.5V–5.5V supply, but rated only to 400 kHz at ≥2.5V (not 1.8V); WP pin functional but no internal pull-down on A0–A2. | Lacks 1.8V-compatible timing - unsuitable for sub-2.5V microcontrollers; requires external address pull-ups. | Select when operating exclusively at 3.3V/5V and external address control is preferred. |
| ON Semiconductor CAT24C64WI-GT3 | Identical 64Kbit organization and 2.7V–5.5V range; supports same 400 kHz at 1.8V; uses identical PDIP-8 footprint and pinout. | Drop-in replacement with identical timing, endurance (1M cycles), and WP functionality; qualified for industrial temp range. | Preferred for second-source assurance with no design changes - validated pin-to-pin and functional compatibility. |
Compared with M24C64-WMN6TP, AT24C64A-10PI-2.7 offers broader low-voltage I²C timing support and simpler address pin handling; versus CAT24C64WI-GT3, it provides equivalent functionality with established qualification history in automotive and industrial deployments.
Availability
AT24C64A-10PI-2.7 is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive body electronics requiring stable component supply across extended product lifecycles.
Supply support for AT24C64A-10PI-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, delivering high-reliability nonvolatile memory solutions since 1980.
The AT24C64A belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, I²C-based parameter storage in space-constrained and thermally demanding embedded systems.
FAQ
What is the maximum I²C clock frequency supported by AT24C64A-10PI-2.7 at 2.7V?
At 2.7V supply, the AT24C64A-10PI-2.7 supports up to 400 kHz I²C clock frequency. This is confirmed in the AC Characteristics table for the 2.7V–3.6V range, where fSCL Max = 400 kHz. The device maintains full timing compliance at this rate across its industrial temperature range (−40°C to +85°C), making AT24C64A-10PI-2.7 suitable for high-throughput configuration updates in real-time control systems.
Does AT24C64A-10PI-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C64A-10PI-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; 4.7 kΩ is commonly used for 400 kHz operation with ≤400 pF total bus capacitance. Without these resistors, AT24C64A-10PI-2.7 cannot drive valid logic-high levels on the I²C bus.
Can AT24C64A-10PI-2.7 be used in a 1.8V system?
No - AT24C64A-10PI-2.7 is specified for 2.7V to 5.5V operation only. While the AT24C64A family includes a -1.8 variant (e.g., AT24C64A-10PI-1.8), the -2.7 suffix explicitly denotes the 2.7V minimum supply version. Using AT24C64A-10PI-2.7 below 2.7V risks unreliable communication, incomplete writes, or data corruption due to insufficient internal voltage margin.
How does the WP pin function on AT24C64A-10PI-2.7?
The WP (Write Protect) pin on AT24C64A-10PI-2.7 is an active-high hardware lock: when tied to VCC, it disables all write operations (byte, page, and erase) to the entire memory array; when grounded, normal writes are permitted. Floating WP is internally pulled down, defaulting to write-enabled mode - but Microchip recommends hardwiring to GND or VCC for deterministic behavior. This feature protects critical data in AT24C64A-10PI-2.7 during power transients or firmware faults.
What is the memory organization of AT24C64A-10PI-2.7?
AT24C64A-10PI-2.7 organizes its 65,536 bits as 8192 words of 8 bits each (8192 × 8), grouped into 256 pages of 32 bytes. This structure enables efficient page writes: sending up to 32 sequential bytes after a single address loads them contiguously. Addressing uses a 13-bit word address (A12–A0), with lower 5 bits auto-incremented during page write - ensuring AT24C64A-10PI-2.7 maximizes bandwidth while preventing unintended cross-page overwrites.
AT24C64A-10PI-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-10PI-2.7 FAQ
1.How can I place an order for AT24C64A-10PI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64A-10PI-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-10PI-2.7 reliable?
The price and inventory of AT24C64A-10PI-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-10PI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C64A-10PI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64A-10PI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64A-10PI-2.7?
AT24C64A-10PI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64A-10PI-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-10PI-2.7?
For technical support, including AT24C64A-10PI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64A-10PI-2.7 requirements.
6.How does Aetrix verify that AT24C64A-10PI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C64A-10PI-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-10PI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C64A-10PI-2.7?
All AT24C64A-10PI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64A-10PI-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-10PI-2.7 part is unused and in its original packaging.
Return procedure for AT24C64A-10PI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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