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Microchip Technology AT24C64-10PC-2.5
- Part No.:
- AT24C64-10PC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64-10PC-2.5.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,471
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Product details
Overview
AT24C64-10PC-2.5 from Microchip Technology (formerly Atmel) is a 64K-bit (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, 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 AT24C64-10PC-2.5 datasheet, AT24C64-10PC-2.5 pinout, AT24C64-10PC-2.5 application, or AT24C64-10PC-2.5 equivalent, key selection considerations include VCC range compatibility (2.5–5.5 V), 100 kHz I²C timing at low voltage, 32-byte page write capability, WP pin functionality, and PDIP-8 packaging for through-hole prototyping and legacy industrial PCBs.
Technical Context
The AT24C64-10PC-2.5 implements a two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. Its internal address counter supports current-address, random-address, and sequential read modes, while device addressing uses A0–A2 pins to enable up to eight devices on one bus.
Write operations are internally timed (max 10 ms), with byte and 32-byte page write modes supported. Hardware write protection inhibits writes to the upper quadrant (16K bits) when WP = VCC, and standby current is specified at 0.5 µA (VCC = 2.5 V), enabling battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8) - provides sufficient nonvolatile storage for firmware configuration, sensor calibration tables, and device identity data in resource-constrained microcontrollers. |
| Supply Voltage Range | 2.5 V to 5.5 V - enables direct interfacing with 2.5 V logic domains and backward compatibility with 3.3 V/5 V systems without level shifting. |
| I²C Clock Frequency | 100 kHz (at 2.5 V) - ensures reliable communication in electrically noisy industrial environments where higher-speed 400 kHz operation is not guaranteed. |
| Page Write Size | 32 bytes - reduces write transaction overhead compared to byte writes, improving efficiency during bulk configuration updates. |
| Write Endurance | 1 million cycles - supports frequent field-updatable parameters (e.g., metering logs, event counters) over extended product lifetimes. |
| Data Retention | 100 years - guarantees long-term integrity of stored calibration coefficients and security keys without refresh. |
| Standby Current | 0.5 µA at VCC = 2.5 V - minimizes quiescent power draw in always-on battery-powered nodes such as remote sensors. |
Pinout & Package
AT24C64-10PC-2.5 is housed in an 8-pin JEDEC-standard PDIP package (0.300" wide), suitable for through-hole mounting, manual soldering, and socket-based development or repair workflows.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Configure slave address (up to 8 devices per I²C bus); floating defaults to logic low for hardware compatibility with AT24C16. |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C devices; requires external pull-up resistor (typically 2.2–10 kΩ). |
| SCL | Serial Clock Input | Master-generated clock signal with Schmitt-trigger input for robust noise rejection in industrial settings. |
| WP | Write Protect Control | Hardware-enforced lock: tied to VCC disables writes to upper 16K bits; tied to GND enables full memory access. |
| VCC | Power Supply | Accepts 2.5–5.5 V; internal voltage regulation ensures stable EEPROM operation across supply variation. |
| GND | Ground Reference | Common return path for logic and memory circuitry; must be low-impedance to prevent I²C signal integrity issues. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation (2.5 V min) | Enables integration into 2.5 V FPGA I/O banks, low-power MCU subsystems, and energy-harvesting designs without voltage translation. |
| 32-byte page write mode | Reduces required I²C transactions by up to 32× versus byte writes, lowering bus occupancy and host CPU overhead during firmware updates. |
| Schmitt-trigger SCL/SDA inputs | Suppresses EMI-induced glitches on long traces or noisy factory floors, eliminating spurious start/stop conditions and bus lockups. |
| Hardware write protection (WP pin) | Prevents accidental or malicious overwrites of critical calibration or security data without software intervention or firmware changes. |
| 100-year data retention | Eliminates need for periodic refresh or backup power in sealed industrial enclosures where maintenance access is infrequent or costly. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Memory |
|---|---|
|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during boot and runtime via I²C; no real-time timing constraints beyond standard 100 kHz bus timing. Use Value: Ensures deterministic startup behavior after power loss and supports field recalibration without firmware reflash or physical reprogramming. |
Use Scenario: Retaining sensor offset/gain coefficients and patient-specific therapy profiles in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for FDA-regulated calibration data; WP pin prevents unauthorized modification during service. Use Value: Meets IEC 62304 traceability requirements for medical device data integrity and eliminates need for external secure elements in Class II devices. |
| Smart Meter Firmware Settings | Automotive Body Control Module (BCM) NVM |
|
Use Scenario: Holding tariff schedules, pulse constants, and utility-specific communication parameters in electricity/water meters operating on lithium primary cells. IC Role / Device Role / Timing Role: Low-power EEPROM accessed intermittently during meter wake-up cycles; standby current ≤0.5 µA extends battery life beyond 10 years. Use Value: Enables decade-long deployment without battery replacement while supporting remote firmware parameter updates over PLC or RF links. |
Use Scenario: Storing seat position presets, mirror angles, and lighting configurations in automotive BCMs requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: Industrial-grade EEPROM (–40°C to +85°C) interfaced to 8-bit/16-bit MCUs via I²C; WP pin safeguards user preferences against ECU reset corruption. Use Value: Provides cost-effective, qualified NVM alternative to flash-based MCU internal memory where endurance and retention exceed flash specifications. |
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 64K-bit capacity, 2.5–5.5 V operation, but SO-8 package (not PDIP); 1 µA standby current at 2.5 V vs. 0.5 µA for AT24C64-10PC-2.5. | Surface-mount only; unsuitable for through-hole prototypes or legacy board repairs requiring PDIP footprint. | Select when automated SMT assembly is used and board space is constrained; verify I²C timing margins at 100 kHz under same VCC/load conditions. |
| BR24G64FJ-WE2 | 64K-bit, 1.7–5.5 V operation, TSSOP-8 package; supports 400 kHz I²C at 2.5 V (AT24C64-10PC-2.5 limited to 100 kHz at 2.5 V). | Higher-speed operation enables faster configuration loads; TSSOP-8 requires rework for PDIP-based designs. | Choose for new designs needing faster writes and smaller footprint; avoid if existing layout uses PDIP-8 or requires strict 100 kHz timing compliance at low voltage. |
Compared with M24C64-WMN6TP and BR24G64FJ-WE2, the AT24C64-10PC-2.5 uniquely combines PDIP-8 packaging, 0.5 µA standby current at 2.5 V, and guaranteed 100 kHz I²C operation in that voltage range-making it optimal for through-hole industrial controllers and battery-powered field instruments where layout flexibility and ultra-low quiescent power are decisive.
Availability
AT24C64-10PC-2.5 is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, smart metering, and automotive body electronics requiring stable component supply and long-term obsolescence management.
Supply support for AT24C64-10PC-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 memory solutions, with a strong heritage in reliable, long-lifecycle industrial components.
The AT24C64-10PC-2.5 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for robust, low-power, I²C-based nonvolatile data storage in cost-sensitive and thermally demanding embedded applications.
FAQ
What is the maximum I²C clock frequency supported by AT24C64-10PC-2.5 at 2.5 V?
The AT24C64-10PC-2.5 supports a maximum I²C clock frequency of 100 kHz when operating at VCC = 2.5 V. This is explicitly specified in the AC Characteristics table under "2.7-, 2.5-volt" column for fSCL. At 5.0 V, it supports up to 400 kHz, but the -2.5 suffix denotes qualification and guaranteed timing only at the lower voltage range.
Does AT24C64-10PC-2.5 support partial page writes?
Yes, AT24C64-10PC-2.5 supports partial page writes within its 32-byte pages. The device accepts up to 32 bytes per page write transaction, and the internal address counter increments automatically. If fewer than 32 bytes are sent before the STOP condition, only those bytes are written-enabling efficient updates of non-contiguous configuration fields without overwriting adjacent data.
What is the function of the WP pin on AT24C64-10PC-2.5?
The WP (Write Protect) pin on AT24C64-10PC-2.5 provides hardware-level write inhibition. When WP is tied to VCC, writes to the upper quadrant (16K bits) of memory are blocked; when tied to GND, full memory access is enabled. If left unconnected, an internal pull-down defaults WP to GND, allowing normal operation-making it safe for designs where write protection is optional.
Is AT24C64-10PC-2.5 compatible with 1.8 V I²C systems?
No, AT24C64-10PC-2.5 is not rated for 1.8 V operation. Its suffix "-2.5" specifies a minimum VCC of 2.5 V (range: 2.5 V to 5.5 V). For 1.8 V systems, Microchip offers the AT24C64-10PC-1.8 variant, which is characterized down to 1.8 V and has different DC/AC timing specs-including lower standby current (0.1 µA) and reduced max clock frequency (100 kHz).
What package type does AT24C64-10PC-2.5 use, and is it RoHS compliant?
AT24C64-10PC-2.5 uses an 8-pin JEDEC PDIP package (0.300" wide, part code 8P3). Per Microchip's packaging documentation and product change notices, this PDIP variant is RoHS-compliant and lead-free, with matte tin lead finish and halogen-free molding compound-meeting IPC/JEDEC J-STD-609A Class 1 requirements.
AT24C64-10PC-2.5 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:
- 10ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64-10PC-2.5 FAQ
1.How can I place an order for AT24C64-10PC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64-10PC-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 AT24C64-10PC-2.5 reliable?
The price and inventory of AT24C64-10PC-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 AT24C64-10PC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C64-10PC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64-10PC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64-10PC-2.5?
AT24C64-10PC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64-10PC-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 AT24C64-10PC-2.5?
For technical support, including AT24C64-10PC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64-10PC-2.5 requirements.
6.How does Aetrix verify that AT24C64-10PC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C64-10PC-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 AT24C64-10PC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C64-10PC-2.5?
All AT24C64-10PC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64-10PC-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 AT24C64-10PC-2.5 part is unused and in its original packaging.
Return procedure for AT24C64-10PC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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