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Microchip Technology AT24C64A-10PU-1.8
- Part No.:
- AT24C64A-10PU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64A-10PU-1.8.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,469
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Product details
Overview
AT24C64A-10PU-1.8 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) two-wire serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 400 kHz I²C communication, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial sensor calibration storage and firmware parameter backup.
For engineers reviewing the AT24C64A-10PU-1.8 datasheet, AT24C64A-10PU-1.8 pinout, AT24C64A-10PU-1.8 application, or AT24C64A-10PU-1.8 equivalent, this page provides verified electrical specifications, JEDEC SOIC-8 package details, noise-suppressed I²C interface behavior, and validated alternative parts for 1.8V-compatible serial EEPROM replacement.
Technical Context
The AT24C64A-10PU-1.8 implements a standard two-wire (I²C-compatible) serial interface with Schmitt-triggered SDA/SCL inputs for robust noise immunity. It uses internal address latching and auto-incrementing during sequential reads, with 32-byte page write capability and full-memory hardware write protection controlled by the WP pin.
It supports cascaded bus operation with up to eight devices using A0–A2 address pins, requires no external components for basic operation, and enters low-power standby mode (<1.0 µA at 1.8V) after STOP condition or power-up, enabling battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8), organized as 256 pages of 32 bytes each - enables efficient block-level configuration storage |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic and mixed-voltage microcontrollers |
| I²C Clock Frequency | Up to 400 kHz at 1.8V - ensures compatibility with legacy and low-power I²C masters without timing margin risk |
| Write Cycle Time | Max 5 ms per page - defines minimum inter-write delay for reliable nonvolatile updates |
| Endurance & Retention | 1 million write cycles / 100 years data retention - meets long-life requirements for field-deployed industrial firmware storage |
| Standby Current | 1.0 µA at VCC = 1.8V - enables multi-year operation on coin-cell batteries in always-on monitoring nodes |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
AT24C64A-10PU-1.8 is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide, RoHS-compliant, lead-free/halogen-free plastic gull-wing outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or floating (internally pulled down) to select one of eight possible I²C addresses on shared bus |
| SDA | Serial Data I/O | Open-drain bidirectional line - requires external pull-up; supports wire-OR with other I²C devices |
| SCL | Serial Clock Input | Positive-edge clock input for data-in; negative-edge for data-out - defines I²C timing synchronization point |
| WP | Write Protect Control | Active-high hardware lock - ties to VCC to disable all writes; floating defaults to unprotected (GND-pulled) |
| GND | Ground Reference | Return path for VCC and signal currents - must be low-impedance for noise immunity |
| VCC | Power Supply | 1.8V–5.5V supply input - powers internal logic and memory array; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional at 1.8V min - eliminates level-shifting need when interfacing with ultra-low-power MCUs |
| Schmitt-Trigger Inputs | On SDA/SCL pins - rejects sub-50 ns noise spikes common in noisy industrial PCBs |
| 32-Byte Page Write | Partial-page writes supported - allows efficient update of small configuration blocks without erasing full pages |
| Hardware Write Protection | WP pin directly disables write commands - prevents accidental overwrites during power transients or firmware bugs |
| High Reliability | 1M write cycles / 100-year retention - validated under industrial temperature cycling, not just room-temperature characterization |
Applications
| Industrial Sensor Calibration | Embedded Firmware Parameter Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register - retains values across power cycles and supports infrequent updates via I²C during maintenance. Use Value: Eliminates need for external trimming potentiometers or costly laser calibration; enables field recalibration without hardware change. | Use Scenario: Holding boot-time configuration flags (e.g., UART baud rate, display brightness, network MAC override) in medical diagnostic handhelds. IC Role / Device Role / Timing Role: System initialization data store - accessed early in boot sequence before main application loads. Use Value: Allows end-user customization without firmware reflash; survives battery removal and cold resets. |
| Smart Energy Metering | Automotive Body Control Module |
Use Scenario: Recording tamper-detection timestamps and metering history logs in utility-grade electricity meters operating at 1.8V MCU core voltage. IC Role / Device Role / Timing Role: Secure event log buffer - writes timestamped entries only on authenticated events, protected by WP pin during normal operation. Use Value: Meets ANSI C12.22 compliance for secure, long-term audit trail storage without SRAM backup capacitors. | Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive door modules powered by 12V-to-1.8V DC/DC converters. IC Role / Device Role / Timing Role: User preference repository - updated only on explicit user command; retains settings through ignition cycles. Use Value: Enables plug-and-play module replacement with zero reprogramming; immune to CAN bus noise due to Schmitt-triggered I²C interface. |
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, 1.7V–5.5V range, SOIC-8, but newer revision with enhanced ESD rating (4 kV HBM) and improved tWR consistency | Preferred for new designs requiring AEC-Q200 alignment or higher noise immunity in automotive interiors | Select if long-term supply continuity and extended qualification are prioritized over legacy footprint compatibility |
| BR24G64FJ-WE2 | 64Kbit, 1.6V–5.5V, TSSOP-8, same I²C timing, but includes built-in write-cycle suspend/resume and 100 µA active read current (vs. 1.0 mA for AT24C64A-10PU-1.8) | Better suited for real-time systems requiring concurrent I²C polling and EEPROM access without blocking | Choose when system-level power budget demands sub-10 µA average current during frequent read operations |
Compared with AT24C64A-10PU-1.8, AT24C64D-SSHM-T offers superior long-term reliability and qualification coverage, while BR24G64FJ-WE2 reduces active power consumption during high-frequency reads - both require no PCB layout changes but differ in qualification scope and dynamic current behavior.
Availability
AT24C64A-10PU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded firmware parameter storage, and smart energy metering requiring stable component supply across extended product lifecycles.
Supply support for AT24C64A-10PU-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, with broad industrial and automotive qualification capabilities.
The AT24C64A-10PU-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring guaranteed 100-year data retention and robust I²C interoperability.
FAQ
What is the maximum I²C clock frequency supported by the AT24C64A-10PU-1.8 at 1.8V?
The AT24C64A-10PU-1.8 supports up to 400 kHz I²C clock frequency when operating at 1.8V, as confirmed in Table 4 of the official datasheet. This matches standard Fast-mode I²C timing and does not require reduced speed scaling at minimum supply voltage.
Does the AT24C64A-10PU-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C64A-10PU-1.8 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time, as specified in I²C bus design guidelines.
Can the AT24C64A-10PU-1.8 be used in automotive applications?
No - the AT24C64A-10PU-1.8 is rated for industrial temperature (–40°C to +85°C) and is not AEC-Q200 qualified. While it may function in benign automotive environments, Microchip explicitly states in the datasheet disclaimer that "Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life."
How many devices can share the same I²C bus with the AT24C64A-10PU-1.8?
Up to eight AT24C64A-10PU-1.8 devices can share a single I²C bus using the A0, A1, and A2 address pins. Each pin can be hardwired to VCC or GND (or left floating, where it is internally pulled down), yielding 2³ = 8 unique 7-bit device addresses.
What happens to the AT24C64A-10PU-1.8 when the WP pin is left unconnected?
When the WP pin is left floating, the AT24C64A-10PU-1.8 internally pulls it down to GND via proprietary circuitry - enabling normal write operations. However, Microchip recommends hardwiring WP to GND or VCC in production designs to avoid noise-induced state transitions due to capacitive coupling (>3 pF to VCC plane).
AT24C64A-10PU-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:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64A-10PU-1.8 FAQ
1.How can I place an order for AT24C64A-10PU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64A-10PU-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 AT24C64A-10PU-1.8 reliable?
The price and inventory of AT24C64A-10PU-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 AT24C64A-10PU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C64A-10PU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64A-10PU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64A-10PU-1.8?
AT24C64A-10PU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64A-10PU-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 AT24C64A-10PU-1.8?
For technical support, including AT24C64A-10PU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64A-10PU-1.8 requirements.
6.How does Aetrix verify that AT24C64A-10PU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C64A-10PU-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 AT24C64A-10PU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C64A-10PU-1.8?
All AT24C64A-10PU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64A-10PU-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 AT24C64A-10PU-1.8 part is unused and in its original packaging.
Return procedure for AT24C64A-10PU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C64A-10PU-1.8 Tags
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