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Microchip Technology AT24C64-10PI-2.5
- Part No.:
- AT24C64-10PI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64-10PI-2.5.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,857
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Product details
Overview
AT24C64-10PI-2.5 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) I²C-compatible serial EEPROM optimized for low-voltage industrial applications. 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 commonly used in embedded systems for storing calibration data, configuration parameters, and firmware boot settings.
For engineers reviewing the AT24C64-10PI-2.5 datasheet, AT24C64-10PI-2.5 pinout, AT24C64-10PI-2.5 application, or AT24C64-10PI-2.5 equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), 2.5V minimum supply compatibility, 32-byte page write capability, Schmitt-triggered noise-immune inputs, and hardware-based upper-quadrant memory write protection.
Technical Context
The AT24C64-10PI-2.5 implements a two-wire I²C interface with open-drain SDA/SCL pins, supports up to eight devices on a shared bus using A0–A2 address inputs, and uses internal address auto-increment during sequential reads. Its device addressing follows standard I²C 7-bit format with R/W bit, and it responds with ACK after each byte received or transmitted.
Write operations are self-timed with a maximum 10 ms cycle time; during this period, all inputs are disabled and acknowledge polling is required to detect completion. The WP pin enables hardware-level write protection of the upper 16K bits (2048 bytes) when driven high, while floating or grounded WP allows full memory access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8 bits), organized as 256 pages of 32 bytes - enables efficient page-write buffering and reduces I²C transaction overhead. |
| Supply Voltage Range | 2.5V to 5.5V - supports direct integration into 2.5V, 3.3V, and 5V logic domains without level-shifting. |
| I²C Clock Frequency | 100 kHz max at 2.5V - ensures reliable timing margin under low-voltage operation with Schmitt-triggered inputs. |
| Write Cycle Time | 10 ms maximum - defines minimum interval between write commands; requires ACK polling for synchronization. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - suitable for field-updatable systems requiring long-term nonvolatile storage. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor metering. |
| Standby Current | 0.5 µA max at 2.5V - minimizes power draw in battery-backed or energy-sensitive applications. |
Pinout & Package
AT24C64-10PI-2.5 is supplied in an 8-pin PDIP (Plastic Dual Inline Package), 0.300" wide, JEDEC MS-001 BA compliant. Pin 1 is marked by a notch or dot; package dimensions are 9.02 mm × 7.11 mm × 3.81 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating to configure one of eight possible I²C addresses (0x50–0x57); internal pull-downs ensure default '0' state if unconnected. |
| SDA | Serial Data I/O | Open-drain bidirectional line for data transfer; requires external pull-up resistor (typically 2.2–10 kΩ) to VCC. |
| SCL | Serial Clock Input | Open-drain clock input synchronized to master; Schmitt trigger input suppresses noise on rising/falling edges. |
| WP | Write Protect Control | Active-high signal: tied to VCC disables writes to upper 16K bits; tied to GND enables full memory access. |
| VCC | Power Supply | Primary supply rail (2.5V–5.5V); decoupling capacitor (0.1 µF ceramic) recommended near pin. |
| GND | Ground Reference | System ground return path; must be low-impedance and co-located with VCC decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 2.5V supply - eliminates need for voltage translators in mixed-supply systems. |
| Noise-Immune Interface | Schmitt-triggered SDA/SCL inputs with 100 ns noise suppression - improves robustness in electrically noisy industrial PCBs. |
| Hardware Write Protection | WP pin controls write access to upper 16K bits - prevents accidental overwrites of critical configuration data. |
| Page Write Mode | 32-byte burst writes reduce I²C bus occupancy vs. byte-by-byte writes - accelerates bulk parameter updates. |
| Cascadable Architecture | Three address pins support up to eight devices on one I²C bus - simplifies multi-sensor or multi-module designs. |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and temperature compensation tables in programmable sensors deployed in HVAC or process control systems. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at power-up and updated during field recalibration. Use Value: Enables traceable, repeatable calibration across product lifetime without requiring external programming fixtures or host intervention. |
Use Scenario: Retaining tariff schedules, billing history, communication credentials, and tamper-event logs in utility smart meters operating in unattended outdoor locations. IC Role / Device Role / Timing Role: Secure, low-power memory for infrequently written but mission-critical operational records. Use Value: Guarantees data integrity over 10+ years of field service with no maintenance, leveraging 100-year retention and 1M-cycle endurance. |
| Embedded System Boot Parameters | Medical Device Settings Backup |
Use Scenario: Holding bootloader configuration flags, secure boot keys, and hardware revision identifiers in medical imaging or diagnostic equipment. IC Role / Device Role / Timing Role: Early-boot configuration store read before main processor initialization; supports fail-safe recovery paths. Use Value: Ensures deterministic startup behavior and regulatory-compliant boot validation even after unexpected power loss. |
Use Scenario: Preserving user-adjusted therapy parameters (e.g., infusion rates, alarm thresholds) and device usage logs in portable infusion pumps or patient monitors. IC Role / Device Role / Timing Role: Patient-specific data vault with hardware write protection to prevent unauthorized modification. Use Value: Meets IEC 62304 safety requirements for data persistence and integrity in Class II/III medical electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95640-DW DW | 4-MHz SPI interface, 5V-only supply (4.5–5.5V), no WP pin - requires software-controlled write enable. | Lacks hardware write protection and low-voltage operation; suited for high-speed SPI hosts only. | Select only if system uses SPI and does not require 2.5V operation or hardware WP. |
| BR24G64FJ-WE2 | 2.5V–5.5V I²C EEPROM, 100 kHz/400 kHz dual-speed mode, built-in error correction code (ECC) - enhances reliability in high-radiation environments. | Includes ECC and extended qualification for automotive AEC-Q100 Grade 2; higher cost and larger footprint. | Prefer for safety-critical automotive or aerospace use where data integrity exceeds standard EEPROM requirements. |
Compared with M95640-DW DW and BR24G64FJ-WE2, the AT24C64-10PI-2.5 offers optimal balance of industrial temperature support, 2.5V compatibility, hardware write protection, and proven field reliability - making it the preferred choice for cost-sensitive, noise-prone industrial embedded designs.
Availability
AT24C64-10PI-2.5 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device manufacturing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT24C64-10PI-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 AT24C64-10PI-2.5 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for robust, low-power, I²C-based configuration and data logging in industrial and commercial systems.
FAQ
What is the operating temperature range for AT24C64-10PI-2.5?
The AT24C64-10PI-2.5 is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the ordering information table on page 12 of the official datasheet, where the "-PI" suffix denotes Industrial grade qualification. The device undergoes temperature cycling and parametric testing across this full range to ensure reliability in factory-floor and outdoor deployment scenarios.
Does AT24C64-10PI-2.5 support 400 kHz I²C operation?
No, AT24C64-10PI-2.5 supports only 100 kHz I²C operation due to its -2.5V low-voltage rating. As specified in the AC Characteristics table (page 4), the maximum clock frequency is 100 kHz for 2.5V, 2.7V, and 1.8V variants. The 400 kHz speed is reserved for 5.0V (4.5–5.5V) versions such as AT24C64-10PC or AT24C64-10PI without the -2.5 suffix.
How does the WP pin function on AT24C64-10PI-2.5?
On the AT24C64-10PI-2.5, the WP (Write Protect) pin provides hardware-level memory protection: when pulled high to VCC, writes to the upper 16K bits (addresses 0x2000–0x3FFF) are inhibited; when tied to GND or left floating (internally pulled down), full memory access is enabled. This behavior is documented in the Pin Description section (page 2) and Device Addressing chapter (page 7).
What package type is used for AT24C64-10PI-2.5?
AT24C64-10PI-2.5 is packaged in an 8-pin PDIP (Plastic Dual Inline Package), designated as 8P3 per the Packaging Information table (page 14). Its dimensions are 9.02 mm × 7.11 mm × 3.81 mm, with 0.300" body width and JEDEC MS-001 BA compliance - suitable for through-hole prototyping and legacy industrial PCBs.
Can AT24C64-10PI-2.5 be used with a 1.8V I²C bus?
No, AT24C64-10PI-2.5 is not rated for 1.8V operation. Its supply range is strictly 2.5V to 5.5V, as defined by the "-2.5" suffix in the part number and confirmed in the DC Characteristics table (page 3, VCC2 row). For 1.8V compatibility, the correct variant is AT24C64-10PI-1.8, which has separate characterization and qualification for that voltage range.
AT24C64-10PI-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64-10PI-2.5 FAQ
1.How can I place an order for AT24C64-10PI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64-10PI-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 AT24C64-10PI-2.5 reliable?
The price and inventory of AT24C64-10PI-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 AT24C64-10PI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C64-10PI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64-10PI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64-10PI-2.5?
AT24C64-10PI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64-10PI-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 AT24C64-10PI-2.5?
For technical support, including AT24C64-10PI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64-10PI-2.5 requirements.
6.How does Aetrix verify that AT24C64-10PI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C64-10PI-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 AT24C64-10PI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C64-10PI-2.5?
All AT24C64-10PI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64-10PI-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 AT24C64-10PI-2.5 part is unused and in its original packaging.
Return procedure for AT24C64-10PI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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