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Microchip Technology AT24C64B-10PU-2.7
- Part No.:
- AT24C64B-10PU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64B-10PU-2.7.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,311
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Product details
Overview
AT24C64B-10PU-2.7 from Microchip Technology (formerly Atmel) is a 64K-bit serial EEPROM organized as 8192 × 8, operating at 2.7–5.5V supply, supporting 400 kHz I²C bus speed, and featuring hardware write protection via the WP pin. It delivers high reliability with 1 million write cycles and 100-year data retention, deployed in industrial control modules for nonvolatile parameter storage.
For engineers reviewing the AT24C64B-10PU-2.7 datasheet, AT24C64B-10PU-2.7 pinout, AT24C64B-10PU-2.7 application, or AT24C64B-10PU-2.7 equivalent, key selection criteria include VCC range (2.7–5.5V), 32-byte page write capability, Schmitt-triggered noise-immune inputs, and PDIP-8 package compatibility with legacy board layouts.
Technical Context
The AT24C64B-10PU-2.7 implements a two-wire (I²C-compatible) serial interface with open-drain SDA and active-high SCL, using address pins A0–A2 to support up to eight devices on one bus. Its internal architecture divides memory into 256 pages of 32 bytes each, enabling partial-page writes without erasing full pages.
Write protection is implemented via the dedicated WP pin: tied to VCC, it locks the upper quadrant (16K bits); tied to GND, full memory access is enabled. Standby current is specified at 2.0 µA (VCC = 2.7V), and the device enters low-power standby after STOP condition completion or power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8), sufficient for storing firmware configuration, calibration data, or device identity in embedded systems. |
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct interfacing with 3.3V and 5V microcontrollers without level shifting. |
| I²C Clock Rate | 400 kHz - enables fast parameter updates while maintaining compatibility with standard I²C controllers. |
| Page Write Size | 32 bytes - minimizes write latency and reduces bus occupancy versus byte-wise writes. |
| Write Endurance | 1 million cycles - ensures robustness in applications requiring frequent logging or counter updates. |
| Data Retention | 100 years - guarantees long-term integrity of stored settings across product lifecycle without refresh. |
| Standby Current | 2.0 µA at 2.7V - critical for battery-powered or energy-harvesting systems where quiescent power must be minimized. |
Pinout & Package
AT24C64B-10PU-2.7 is supplied in an 8-lead PDIP (Plastic Dual Inline Package), 0.300" wide body, suitable for through-hole prototyping and industrial PCBs requiring mechanical robustness and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or pulled low to select one of up to eight devices on shared I²C bus; floating pins are internally biased low if board coupling <3 pF. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; supports wire-OR with other I²C peripherals. |
| SCL | Serial Clock Input | Positive-edge sampled clock input; timing-critical for data setup/hold compliance per I²C spec. |
| WP | Hardware Write Protect | Active-high signal blocking writes to upper 16K bits when driven to VCC; GND enables full write access. |
| GND | Ground Reference | Primary return path for all internal circuitry and I/O leakage currents. |
| VCC | Power Supply | Single-supply input supporting 2.7–5.5V operation; powers internal logic, memory array, and I/O buffers. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-triggered inputs | Suppresses noise on SDA/SCL lines in electrically noisy industrial environments, eliminating false start/stop detection. |
| Self-timed write cycle | Fixed 5 ms max internal erase/write duration eliminates need for host polling delay management beyond ACK polling. |
| Bi-directional I²C protocol | Enables both read and write operations over same two pins, reducing PCB routing complexity and connector pin count. |
| Lead-free/halogen-free packaging | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for surface-mount reflow. |
Applications
| Industrial PLC Configuration Storage | Smart Meter Calibration Data |
|---|---|
Use Scenario: Storing user-defined I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers during commissioning and field maintenance. IC Role / Device Role / Timing Role: Nonvolatile parameter register holding persistent configuration that survives AC power loss and system resets. Use Value: Enables zero-configuration restart after power interruption and eliminates need for external backup batteries or supercapacitors. | Use Scenario: Recording factory-calibrated ADC gain/offset coefficients and tariff tables in electricity/water/gas meters for metrological traceability. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory segment accessed only during initial setup or authorized firmware update. Use Value: WP pin prevents accidental overwrites during field firmware upgrades, ensuring regulatory compliance and measurement accuracy. |
| Medical Device Serial Number Log | Automotive Body Control Module Settings |
Use Scenario: Logging unique device identifiers, manufacturing date, and calibration timestamps in portable diagnostic equipment for FDA UDI compliance. IC Role / Device Role / Timing Role: Immutable audit trail memory updated once at production test, then locked via WP pin. Use Value: Meets ISO 13485 traceability requirements without requiring secure MCU flash partitioning or cryptographic signing overhead. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs for driver personalization across ignition cycles. IC Role / Device Role / Timing Role: Low-power, fast-access configuration store synchronized with CAN bus wake-up events. Use Value: 2.0 µA standby current extends battery life during vehicle sleep mode; 400 kHz I²C allows rapid recall before driver entry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C64-WMN6TP | Same 64K-bit capacity, 2.5–5.5V VCC range, but uses 8-lead SOIC (8S1) instead of PDIP; no WP pin - write protection handled via software lock bits. | Lacks hardware WP, making it unsuitable where physical write disable is required for safety-critical calibration data. | Select only if board layout supports SOIC and software-based protection suffices. |
| CAT24C64YI-GT3 | Identical 64K-bit organization and 2.7–5.5V operation, but rated for extended temperature (−40°C to +125°C); higher ISB (3.0 µA at 2.7V). | Better suited for under-hood automotive applications where ambient exceeds 85°C, but consumes more standby power. | Choose when operating temperature exceeds industrial grade limits, accepting marginal increase in quiescent current. |
Compared with AT24C64B-10PU-2.7, M24C64-WMN6TP trades hardware write protection for smaller SOIC footprint and software flexibility, while CAT24C64YI-GT3 extends thermal range at the cost of slightly higher standby draw - neither offers pin-to-pin compatibility due to differing package types and protection mechanisms.
Availability
AT24C64B-10PU-2.7 is available at Aetrix Electronics and suitable for industrial PLCs, smart utility meters, and medical diagnostics equipment requiring stable component supply across multi-year production cycles.
Supply support for AT24C64B-10PU-2.7 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 delivering microcontrollers, analog components, and memory solutions for embedded control applications.
The AT24C64B belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-voltage, I²C-based nonvolatile data storage in space-constrained and power-sensitive industrial and commercial systems.
FAQ
What is the maximum clock frequency supported by AT24C64B-10PU-2.7?
The AT24C64B-10PU-2.7 supports a maximum I²C clock frequency of 400 kHz across its full operating voltage range (2.7–5.5V). This rate is guaranteed under AC conditions with CL ≤ 100 pF and meets standard Fast-mode I²C timing specifications including tLOW ≥ 1.3 µs and tHIGH ≥ 0.6 µs at 2.7V operation. The device does not support standard-mode (100 kHz) or high-speed mode (3.4 MHz) by default.
Does AT24C64B-10PU-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C64B-10PU-2.7 requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values range from 1.8 kΩ (for 400 kHz at 3.3V) to 4.7 kΩ (for slower speeds or higher VCC), selected based on bus capacitance and rise-time requirements. The internal circuitry does not provide active pull-ups.
How does the WP pin function on AT24C64B-10PU-2.7?
On AT24C64B-10PU-2.7, the WP (Write Protect) pin provides hardware-level memory protection: when tied to VCC, writes to the upper quadrant (16K bits) are inhibited; when tied to GND, full memory write access is enabled. If left floating, the pin is internally pulled down under low-capacitance conditions (<3 pF), defaulting to unprotected mode - Atmel recommends explicit GND connection for reliability.
What package type is used for AT24C64B-10PU-2.7?
AT24C64B-10PU-2.7 uses an 8-lead PDIP (Plastic Dual Inline Package) with 0.300" body width (ordering code 8P3). This through-hole package features 0.100" lead pitch and is compatible with standard DIP sockets and wave-solder processes, distinguishing it from SOIC or TSSOP variants in the same family.
Can AT24C64B-10PU-2.7 operate at 1.8V?
No, AT24C64B-10PU-2.7 is specifically rated for 2.7–5.5V operation, as indicated by the "-2.7" suffix. Devices supporting 1.8–5.5V are designated with "-1.8" (e.g., AT24C64B-10PU-1.8). Attempting 1.8V operation on AT24C64B-10PU-2.7 may result in unreliable communication, incomplete writes, or failure to acknowledge I²C addresses.
AT24C64B-10PU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64B-10PU-2.7 FAQ
1.How can I place an order for AT24C64B-10PU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64B-10PU-2.7 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 AT24C64B-10PU-2.7 reliable?
The price and inventory of AT24C64B-10PU-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C64B-10PU-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C64B-10PU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64B-10PU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64B-10PU-2.7?
AT24C64B-10PU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64B-10PU-2.7 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 AT24C64B-10PU-2.7?
For technical support, including AT24C64B-10PU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64B-10PU-2.7 requirements.
6.How does Aetrix verify that AT24C64B-10PU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C64B-10PU-2.7 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 AT24C64B-10PU-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C64B-10PU-2.7?
All AT24C64B-10PU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64B-10PU-2.7, 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 AT24C64B-10PU-2.7 part is unused and in its original packaging.
Return procedure for AT24C64B-10PU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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