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Microchip Technology AT24C64-10PI
- Part No.:
- AT24C64-10PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64-10PI.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,458
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Product details
Overview
AT24C64-10PI from Microchip Technology (formerly Atmel) is an industrial-grade 64 Kbit I²C-compatible serial EEPROM with 8192 × 8-bit organization, 2.7V–5.5V supply range, 10 ms max write cycle time, and hardware write protection via WP pin-used for nonvolatile parameter storage in embedded controllers, power meters, and industrial sensors.
For engineers reviewing the AT24C64-10PI datasheet, AT24C64-10PI pinout, AT24C64-10PI application, or AT24C64-10PI equivalent, key selection considerations include industrial temperature support (−40°C to +85°C), 100 kHz I²C speed at 2.7V, 32-byte page write capability, and PDIP-8 packaging with hard-wired device addressing (A0–A2).
Technical Context
The AT24C64-10PI implements a two-wire I²C interface with Schmitt-trigger inputs and noise filtering, supporting up to eight devices on a shared bus via A0–A2 address pins. It uses open-drain SDA/SCL signaling compliant with standard I²C timing requirements.
Internally organized as 256 pages of 32 bytes each, it supports byte-write and page-write operations with automatic address incrementing within a page. Write protection is implemented via the WP pin, which disables writes to the upper quadrant (16K bits) when pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8-bit), enabling storage of firmware calibration data or configuration registers in space-constrained systems |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V microcontrollers without level shifting |
| Write Cycle Time | Max 10 ms - defines minimum interval between successive write commands; impacts real-time logging latency |
| I²C Clock Frequency | 100 kHz at 2.7V - ensures reliable communication under low-voltage industrial conditions |
| Endurance | 1 million write cycles - guarantees long-term reliability in applications requiring frequent parameter updates |
| Data Retention | 100 years at 25°C - ensures persistent storage across product lifetime without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including factory automation and energy metering |
Pinout & Package
AT24C64-10PI is supplied in an 8-pin JEDEC PDIP (package code 8P3), 0.300" wide, through-hole package suitable for prototyping and legacy industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hard-wired or left floating to configure one of eight possible I²C addresses; enables multi-device bus topology |
| SDA | Serial Data I/O | Open-drain bidirectional line for data transfer; requires external pull-up resistor (typically 4.7 kΩ) |
| SCL | Serial Clock Input | Master-generated clock signal synchronizing all read/write transactions on the I²C bus |
| WP | Write Protect Control | Hardware-enforced lock for upper 16K bits; prevents accidental overwrites during firmware updates |
| VCC | Power Supply | Primary supply input (2.7–5.5V); powers internal logic and memory array |
| GND | Ground Reference | Common return path for VCC and I/O signals; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 2.7V supply - eliminates need for voltage regulators in battery-backed systems |
| Page Write Mode | 32-byte burst writes reduce I²C transaction overhead by 97% vs. individual byte writes |
| Schmitt Trigger Inputs | Suppresses noise-induced false clock/data transitions in electrically noisy industrial settings |
| Hardware Write Protection | WP pin disables writes to critical upper memory quadrant - prevents corruption during brown-out events |
| High Reliability | 1M write cycles + 100-year data retention - meets long-lifecycle requirements for infrastructure equipment |
Applications
| Smart Energy Meters | Industrial PLC Modules |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs across power outages. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed data integrity during mains failure. Use Value: WP pin prevents overwrite of calibration data during firmware update; 100-year retention ensures compliance with utility certification standards. |
Use Scenario: Holding I/O mapping tables, PID tuning parameters, and firmware version identifiers in programmable logic controllers. IC Role / Device Role / Timing Role: Parameter backup memory accessed via microcontroller I²C during boot and runtime reconfiguration. Use Value: −40°C to +85°C operation ensures stable behavior inside control cabinets; 32-byte page writes accelerate parameter batch updates. |
| Medical Diagnostic Devices | Automotive Body Control Units |
Use Scenario: Saving user preferences, sensor calibration offsets, and diagnostic fault history in portable ultrasound or ECG units. IC Role / Device Role / Timing Role: Low-power EEPROM for infrequent but mission-critical data persistence between battery charges. Use Value: 2 µA standby current extends battery life; Schmitt-trigger inputs reject EMI from adjacent RF modules. |
Use Scenario: Storing seat position memory, mirror presets, and lighting configuration in automotive interior modules. IC Role / Device Role / Timing Role: I²C-configurable nonvolatile memory interfaced directly to 3.3V automotive microcontrollers. Use Value: 2.7V–5.5V operation accommodates vehicle battery transients; 1M endurance supports 15+ years of daily use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24C64D-SSHM-T | Same 64Kbit capacity, 1.7–5.5V supply, TSSOP-8 package, and −40°C to +85°C rating; lower ISB (0.1 µA @ 1.8V) | Surface-mount only; lacks PDIP option; optimized for ultra-low-power battery applications | Select when board space is constrained and reflow assembly is used; not drop-in for through-hole designs. |
| ON Semiconductor CAT24C64WI-GT3 | 64Kbit I²C EEPROM, 1.8–5.5V, SOIC-8, −40°C to +85°C; supports 400 kHz at 2.5V+ | Higher-speed I²C (400 kHz) at ≥2.5V; no 2.7V-specific speed bin; different WP logic polarity | Choose for faster parameter loading in 3.3V systems where WP active-high behavior is acceptable. |
Compared with AT24C64-10PI, the AT24C64D-SSHM-T offers superior low-voltage standby current but requires PCB redesign for TSSOP, while the CAT24C64WI-GT3 enables faster I²C throughput above 2.5V but lacks the precise 2.7V/100 kHz guarantee and uses inverted WP logic.
Availability
AT24C64-10PI is available at Aetrix Electronics and suitable for industrial control systems, smart metering infrastructure, and medical diagnostics equipment requiring stable component supply across extended product lifecycles.
Supply support for AT24C64-10PI 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 for industrial, automotive, and consumer markets.
The AT24C64-10PI belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for robust, low-power, I²C-based configuration and calibration data storage in harsh operating environments.
FAQ
What is the maximum I²C clock frequency supported by the AT24C64-10PI?
The AT24C64-10PI supports up to 100 kHz I²C clock frequency when operated at 2.7V–5.5V supply. This is confirmed in the AC Characteristics table for the "2.7-, 2.5-volt" column, where fSCL min/max is specified as 100 kHz. It does not support 400 kHz operation at 2.7V - that speed is only guaranteed for 5.0V operation per the same datasheet section.
Does the AT24C64-10PI require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C64-10PI requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. The datasheet specifies typical values of 4.7 kΩ for standard-mode operation, and the actual resistance must be selected based on bus capacitance and desired rise time to meet I²C timing requirements.
How does the WP pin function on the AT24C64-10PI?
On the AT24C64-10PI, the WP (Write Protect) pin disables write access to the upper quadrant (16K bits) of memory when pulled high to VCC. When WP is tied to GND or left unconnected (internally pulled down), full memory write capability is enabled. This provides hardware-level protection against unintended firmware or configuration overwrites.
What package type is used for the AT24C64-10PI?
The AT24C64-10PI uses an 8-pin JEDEC PDIP (Plastic Dual Inline Package), designated as package code 8P3 in the ordering information. Its dimensions are 0.300" wide with 0.100" lead pitch, making it compatible with standard through-hole PCB layouts and socket-based development platforms.
Is the AT24C64-10PI suitable for automotive applications?
The AT24C64-10PI is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. While it may function in some automotive body electronics, Microchip does not specify it for under-hood or safety-critical automotive use. For automotive applications, designers should select AEC-Q100 qualified variants such as the AT24C64AN-10SU-2.7.
AT24C64-10PI 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64-10PI FAQ
1.How can I place an order for AT24C64-10PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64-10PI 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 reliable?
The price and inventory of AT24C64-10PI 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 is usually 5 days.
3.What payment methods are accepted for AT24C64-10PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64-10PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64-10PI?
AT24C64-10PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64-10PI 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?
For technical support, including AT24C64-10PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64-10PI requirements.
6.How does Aetrix verify that AT24C64-10PI is sourced from the original manufacturer or authorized distributors?
All AT24C64-10PI 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 meets industry standards.
7.What is the process for return or replacement of AT24C64-10PI?
All AT24C64-10PI units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64-10PI, 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 part is unused and in its original packaging.
Return procedure for AT24C64-10PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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