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Microchip Technology AT24C64-10PC
- Part No.:
- AT24C64-10PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64-10PC.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,415
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Product details
Overview
AT24C64-10PC 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 100 kHz clock speed at 2.7V, hardware write protection via WP pin, and 32-byte page write capability. It is used in embedded systems for nonvolatile storage of calibration data, configuration settings, and firmware parameters.
For engineers reviewing the AT24C64-10PC datasheet, AT24C64-10PC pinout, AT24C64-10PC application, or AT24C64-10PC equivalent, key selection considerations include voltage range compatibility (2.7–5.5V), industrial-grade temperature operation (0°C to 70°C), PDIP-8 packaging, 10 ms max write cycle time, and hardware-based memory protection.
Technical Context
The AT24C64-10PC implements a two-wire I²C interface with Schmitt-trigger inputs and noise filtering, supporting bidirectional data transfer using open-drain SDA and edge-triggered SCL. Device addressing uses three hardware-configurable pins (A0–A2), enabling up to eight devices on a shared bus.
It features internal address auto-increment during sequential reads/writes, acknowledge polling for write-cycle completion detection, and a dedicated Write Protect (WP) pin that disables writes to the upper quadrant (16K bits) when pulled high. Memory is structured into 256 pages of 32 bytes each, with page-write rollover behavior strictly confined within page boundaries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8 bits), sufficient for storing device configuration, calibration coefficients, or boot parameters in space-constrained designs. |
| Supply Voltage Range | 2.7V to 5.5V - supports mixed-voltage systems and legacy 5V microcontrollers while enabling low-power operation down to 2.7V. |
| Max Clock Frequency | 100 kHz at 2.7V - ensures reliable I²C timing margins in noisy industrial environments without requiring external pull-up optimization. |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands; impacts firmware update latency and logging throughput. |
| Endurance | 1 million write cycles - enables frequent parameter updates over product lifetime, e.g., in energy metering or sensor calibration loops. |
| Data Retention | 100 years at 25°C - guarantees long-term integrity of stored configuration data without refresh, critical for unattended infrastructure equipment. |
| Standby Current | 0.5 µA at 2.7V - minimizes quiescent power draw in battery-backed or always-on applications such as smart meters or IoT edge nodes. |
Pinout & Package
AT24C64-10PC is supplied in an 8-pin JEDEC PDIP (package code 8P3), 0.300" wide, through-hole compatible package suitable for prototyping and industrial control boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardware-selectable I²C slave address bits; allow up to eight AT24C64-10PC devices on one bus without software arbitration. |
| SDA | Serial Data I/O | Open-drain bidirectional line for I²C data exchange; requires external pull-up resistor and supports wire-OR connection with other I²C peripherals. |
| SCL | Serial Clock Input | Positive-edge clock input for synchronous data transfer; timing-critical path requiring controlled rise/fall times per I²C spec. |
| WP | Write Protect Control | Hardware-enforced lock for upper 16K bits; tied to VCC to prevent accidental overwrite of critical firmware or calibration data. |
| VCC | Power Supply | Primary supply rail (2.7–5.5V); powers internal logic and memory array; decoupling capacitor required near pin for noise immunity. |
| GND | Ground Reference | System return path for all internal circuits; must be low-impedance and co-located with VCC decoupling for stable operation. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables burst programming of up to 32 bytes per write cycle, reducing I²C transaction overhead and improving firmware update efficiency. |
| Schmitt-trigger, filtered inputs | Suppresses electrical noise on SDA/SCL lines, eliminating false start/stop detection in electrically harsh environments like motor drives or PLCs. |
| Self-timed write cycle | Removes need for host MCU to manage write timing; host can poll ACK to detect completion, simplifying firmware implementation. |
| Hardware write protection (WP) | Physically blocks writes to top 25% of memory when WP = VCC, safeguarding bootloader or security keys from corruption during field updates. |
| 100-year data retention | Ensures configuration persistence across product lifecycle without periodic refresh, meeting requirements for utility metering and medical devices. |
Applications
| Industrial Sensor Calibration | Smart Energy Metering |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables for analog sensor front-ends. IC Role / Device Role / Timing Role: Nonvolatile configuration storage element interfaced via I²C to microcontroller during power-up or sensor initialization. Use Value: Eliminates need for external calibration hardware; enables field recalibration with verified coefficients retained across power cycles and 100-year lifespan. |
Use Scenario: Holding tariff schedules, billing registers, tamper logs, and cryptographic keys in residential/utility electricity meters. IC Role / Device Role / Timing Role: Secure, low-power persistent memory for regulatory-compliant data logging and secure boot parameters. Use Value: WP pin prevents unauthorized modification of tariff data; 1M endurance supports daily log entries for >2700 years of operation. |
| Embedded System Configuration | Automotive Body Control Module |
Use Scenario: Saving user preferences, network settings, and operational modes in networked HVAC controllers or industrial HMIs. IC Role / Device Role / Timing Role: I²C-accessible configuration store accessed during boot and runtime by ARM Cortex-M host MCU. Use Value: 2.7V operation allows direct interfacing with 3.3V logic; page write reduces configuration save time to <320 ms for full 8KB dataset. |
Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive body control units (BCUs). IC Role / Device Role / Timing Role: Automotive-grade EEPROM providing robust NVM for personalized settings with ESD >3000V tolerance. Use Value: PDIP-8 package supports manual rework in low-volume BCU assembly; 0.5 µA standby current extends battery life during vehicle sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C64D-SSHM-T | Same 64Kbit capacity and 2.7–5.5V range, but in 8-pin SOIC (8S1) package and rated for -40°C to +85°C industrial temp range. | Preferred for surface-mount production and extended temperature operation; lacks PDIP-8 through-hole option. | Select when board space is constrained and automated assembly is required; verify PCB footprint compatibility before migration. |
| BR24G64FJ-WE2 | Rohm 64Kbit I²C EEPROM with identical 2.7–5.5V range and 100 kHz speed, but offers 1.8V option and lower 0.1 µA standby current at 1.8V. | Better suited for ultra-low-power battery applications; pinout matches AT24C64-10PC but requires validation of WP behavior and page write timing. | Choose for new designs targeting sub-µA sleep modes; confirm WP pin logic and AC timing compliance before drop-in use. |
Compared with AT24C64D-SSHM-T and BR24G64FJ-WE2, the AT24C64-10PC provides proven PDIP-8 reliability for manual assembly and legacy system upgrades, while maintaining identical core functionality and I²C protocol compliance - making it optimal for prototyping, repair, and cost-sensitive industrial control applications.
Availability
AT24C64-10PC is available at Aetrix Electronics and suitable for industrial sensor calibration, smart energy metering, and embedded system configuration requiring stable component supply, long-lifecycle support, and through-hole assembly compatibility.
Supply support for AT24C64-10PC 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 support for the AT24Cxx EEPROM family, delivering high-reliability nonvolatile memory solutions for industrial, automotive, and consumer applications.
The AT24C64-10PC belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-power, I²C-based configuration and data logging in resource-constrained embedded systems where pin count, board space, and long-term data integrity are critical.
FAQ
What is the operating temperature range for AT24C64-10PC?
The AT24C64-10PC is specified for commercial temperature operation from 0°C to +70°C. This range is confirmed in the AT24C64 Ordering Information table, where "AT24C64-10PC" maps to "Commercial (0°C to 70°C)" and uses the 8P3 PDIP package. It is not rated for industrial (-40°C to +85°C) or automotive grades.
Does AT24C64-10PC support 400 kHz I²C communication?
No, AT24C64-10PC does not support 400 kHz I²C. Per the AC Characteristics table and Ordering Information, the "-10PC" suffix denotes the 2.7V option with 100 kHz maximum clock frequency. Only versions with blank suffix (e.g., AT24C64-10PC without "-2.7") support 400 kHz - but those require VCC ≥ 4.5V, which conflicts with the -2.7 designation.
What package type is used for AT24C64-10PC?
AT24C64-10PC uses the 8P3 package: an 8-lead, 0.300" wide plastic dual in-line package (PDIP). This is explicitly listed in the AT24C64 Ordering Information table under "Package" for all "AT24C64-10PC" entries, and confirmed in the Packaging Information section with mechanical drawings labeled "8P3".
How many write cycles can AT24C64-10PC endure?
The AT24C64-10PC guarantees 1 million write cycles per memory location, as stated in the "High Reliability" section and confirmed in the AC Characteristics table under "Endurance". This applies to both byte and page write operations across the full 8192-word memory array.
Is the WP pin on AT24C64-10PC active-high or active-low?
The WP pin on AT24C64-10PC is active-high: when tied to VCC, it inhibits write operations to the upper quadrant (16K bits) of memory; when tied to GND or left floating (internally pulled down), full memory access is enabled. This behavior is defined in the "Pin Description" and "DATA SECURITY" sections of the documentation.
AT24C64-10PC 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64-10PC FAQ
1.How can I place an order for AT24C64-10PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64-10PC 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 reliable?
The price and inventory of AT24C64-10PC 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 is usually 5 days.
3.What payment methods are accepted for AT24C64-10PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64-10PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64-10PC?
AT24C64-10PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64-10PC 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?
For technical support, including AT24C64-10PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64-10PC requirements.
6.How does Aetrix verify that AT24C64-10PC is sourced from the original manufacturer or authorized distributors?
All AT24C64-10PC 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 meets industry standards.
7.What is the process for return or replacement of AT24C64-10PC?
All AT24C64-10PC units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64-10PC, 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 part is unused and in its original packaging.
Return procedure for AT24C64-10PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C64-10PC Tags
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