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Microchip Technology AT24C64-10PC-1.8
- Part No.:
- AT24C64-10PC-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64-10PC-1.8.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,491
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Product details
Overview
AT24C64-10PC-1.8 from Microchip Technology (formerly Atmel) is a 64K-bit (8192 × 8) I²C-compatible serial EEPROM optimized for ultra-low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz I²C bus speed at 1.8V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in battery-powered IoT sensors for nonvolatile configuration storage.
For engineers reviewing the AT24C64-10PC-1.8 datasheet, AT24C64-10PC-1.8 pinout, AT24C64-10PC-1.8 application, or AT24C64-10PC-1.8 equivalent, key selection criteria include 1.8V minimum supply compatibility, 32-byte page write capability, Schmitt-triggered noise-immune inputs, and JEDEC PDIP-8 packaging for through-hole prototyping and industrial control modules.
Technical Context
The AT24C64-10PC-1.8 implements a standard two-wire I²C interface with open-drain SDA/SCL pins, internal address latching via A0–A2 pins, and hardware-based upper-quadrant write protection activated when WP = VCC. Its memory is organized as 256 pages of 32 bytes each, enabling efficient partial-page writes without erasing entire sectors.
It uses an internal low-VCC detector to prevent data corruption during brown-out conditions and incorporates Schmitt-triggered inputs with 100 ns noise suppression time. The device enters standby mode automatically after STOP condition receipt, drawing only 0.1 µA at 1.8V - critical for energy-constrained edge nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 65,536 bits (8192 × 8), directly addressable via 13-bit word address |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and mixed-voltage systems |
| I²C Clock Frequency | 100 kHz max at 1.8V - ensures reliable timing margin under low-power operation |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write commands |
| Standby Current | 0.1 µA at 1.8V - extends battery life in always-on sensor nodes |
| Endurance | 1 million write cycles - supports frequent calibration or logging updates over product lifetime |
| Data Retention | 100 years at 25°C - guarantees long-term firmware parameter integrity without refresh |
Pinout & Package
AT24C64-10PC-1.8 is housed in an 8-pin JEDEC-standard PDIP package (0.300" wide, 8P3), suitable for breadboard evaluation and legacy PCB layouts requiring through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Enable up to eight AT24C64 devices on one I²C bus; floating defaults to logic low |
| SDA | Serial Data I/O | Bidirectional open-drain line - requires external pull-up; supports wire-OR with other I²C peripherals |
| SCL | Serial Clock Input | Positive-edge clock input for data-in; negative-edge for data-out - defines I²C timing window |
| WP | Write Protect Control | Hardware lock for upper 16K bits - tied to VCC to inhibit writes, GND for full access |
| VCC | Power Supply | 1.8V–5.5V tolerant - eliminates need for level-shifting in 1.8V microcontroller designs |
| GND | Ground Reference | Common return path for all internal circuitry and I²C signaling |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Guaranteed functionality down to 1.8V supply - enables direct integration with modern ultra-low-power MCUs |
| 32-Byte Page Write Mode | Reduces write overhead by batching up to 32 bytes per command - cuts firmware latency vs. byte-write |
| Schmitt Trigger Inputs | Suppresses digital noise on SDA/SCL lines - improves robustness in electrically noisy industrial environments |
| Hardware Write Protection | Prevents accidental overwrite of critical calibration or security data using dedicated WP pin |
| 100-Year Data Retention | Eliminates need for periodic refresh or backup power - simplifies design for maintenance-free deployments |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Backup |
|---|---|
Use Scenario: Storing meter-specific calibration coefficients and tariff tables in utility-grade smart electricity meters operating on coin-cell batteries. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed infrequently but requiring guaranteed integrity across 15+ year field life. Use Value: 1.8V operation allows direct connection to meter's low-power MCU; 100-year retention ensures no recalibration needed over product lifetime. | Use Scenario: Preserving ladder logic parameters and I/O mapping in programmable logic controllers exposed to voltage transients and temperature extremes. IC Role / Device Role / Timing Role: Fail-safe configuration vault that survives brownouts and ESD events without data loss. Use Value: Schmitt-triggered inputs and >3,000V ESD rating ensure reliable operation in factory-floor EMI environments. |
| Medical Sensor Firmware Settings | Automotive Body Control Module NVM |
Use Scenario: Holding patient-specific sensor gain settings and alarm thresholds in portable diagnostic devices powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-power persistent memory supporting secure, infrequent writes during device setup or calibration. Use Value: 0.1 µA standby current extends battery runtime; WP pin prevents unintended modification during firmware updates. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs where space and reliability are constrained. IC Role / Device Role / Timing Role: Automotive-grade EEPROM providing tamper-resistant user preference storage with extended temperature support. Use Value: Qualified for industrial temperature range (−40°C to +85°C); 1M endurance supports repeated personalization over vehicle lifetime. |
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 64K-bit capacity and 1.8V operation, but in 8-pin SOIC (8S1) package; lower ISB (0.1 µA) and same tWR (10 ms) | Surface-mount assembly required; better thermal performance and board density than PDIP | Select for automated SMT production or space-constrained PCBs where through-hole is not feasible |
| BR24G64FJ-WE2 | Rohm part with identical 64K-bit organization and 1.7V–5.5V range; supports 400 kHz at 1.7V, slightly higher ISB (0.3 µA at 1.8V) | Qualified to AEC-Q100 Grade 2; includes built-in write-cycle counter and enhanced error detection | Select for automotive applications requiring qualification evidence and advanced diagnostics beyond basic EEPROM function |
Compared with AT24C64-10PC-1.8, AT24C64D-SSHM-T offers superior manufacturability in high-volume SMT lines, while BR24G64FJ-WE2 adds automotive qualification and diagnostic features - neither is pin-compatible due to differing package footprints and internal register maps.
Availability
AT24C64-10PC-1.8 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical sensors, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for AT24C64-10PC-1.8 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 AT24C64-10PC-1.8 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems needing reliable, byte-addressable nonvolatile storage with minimal external components.
FAQ
What is the maximum I²C clock frequency supported by AT24C64-10PC-1.8 at 1.8V?
The AT24C64-10PC-1.8 supports a maximum I²C clock frequency of 100 kHz when operating at 1.8V. This is specified in the AC Characteristics table under "1.8-volt" column for parameter fSCL. Higher frequencies (up to 400 kHz) are only guaranteed at ≥2.7V supply - attempting 400 kHz at 1.8V may result in timing violations and communication failure. Always verify bus capacitance and pull-up strength for reliable 100 kHz operation.
Does AT24C64-10PC-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C64-10PC-1.8 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 100 kHz operation with standard bus capacitance. Pull-up voltage must match the host system's logic level (e.g., 1.8V for 1.8V I²C masters). Omitting pull-ups will prevent proper signal high-level establishment and cause communication failure.
How does the WP pin function on AT24C64-10PC-1.8?
On AT24C64-10PC-1.8, the WP (Write Protect) pin provides hardware-level protection for the upper quadrant (16K bits) of memory. When WP is tied to VCC, writes to addresses 0x2000–0x3FFF are inhibited; when grounded, full memory access is enabled. If left unconnected, an internal pull-down activates, allowing normal write operations. This feature prevents accidental overwrites of critical calibration or security data during firmware updates or field service.
Can AT24C64-10PC-1.8 be used in automotive applications?
AT24C64-10PC-1.8 is rated for commercial (0°C to +70°C) and industrial (−40°C to +85°C) temperature ranges, making it suitable for under-hood automotive applications only if ambient temperatures remain within −40°C to +85°C and automotive qualification (e.g., AEC-Q100) is not mandated. For certified automotive use, Microchip offers AEC-Q100 qualified variants like AT24C64C-SSHM-T - the AT24C64-10PC-1.8 itself lacks formal automotive qualification documentation.
What is the page size and maximum write length for AT24C64-10PC-1.8?
The AT24C64-10PC-1.8 has a fixed page size of 32 bytes. In page write mode, it accepts up to 32 bytes per transaction - starting from any address aligned to a 32-byte boundary. If more than 32 bytes are sent, the address rolls over within the same page, overwriting earlier data. Partial-page writes (e.g., 5 or 12 bytes) are fully supported and do not require padding to 32 bytes, enabling efficient small-data updates without wasted bandwidth.
AT24C64-10PC-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64-10PC-1.8 FAQ
1.How can I place an order for AT24C64-10PC-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64-10PC-1.8 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-1.8 reliable?
The price and inventory of AT24C64-10PC-1.8 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-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C64-10PC-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64-10PC-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64-10PC-1.8?
AT24C64-10PC-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64-10PC-1.8 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-1.8?
For technical support, including AT24C64-10PC-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64-10PC-1.8 requirements.
6.How does Aetrix verify that AT24C64-10PC-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C64-10PC-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C64-10PC-1.8?
All AT24C64-10PC-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64-10PC-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for AT24C64-10PC-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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