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Microchip Technology AT24C64-10PC-2.7
- Part No.:
- AT24C64-10PC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT24C64-10PC-2.7.pdf
- Description:
- IC EEPROM 64KBIT I2C 400KHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,569
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Product details
Overview
AT24C64-10PC-2.7 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 2.7V to 5.5V, supports 100 kHz I²C bus speed, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial control panels for parameter storage and calibration data backup.
For engineers reviewing the AT24C64-10PC-2.7 datasheet, AT24C64-10PC-2.7 pinout, AT24C64-10PC-2.7 application, or AT24C64-10PC-2.7 equivalent, key selection criteria include VCC range compatibility (2.7–5.5 V), 100 kHz I²C timing at low voltage, 32-byte page write capability, WP pin functionality for quadrant-level write protection, and PDIP-8 packaging for through-hole prototyping and legacy board replacement.
Technical Context
The AT24C64-10PC-2.7 implements a two-wire I²C interface with open-drain SDA/SCL pins, Schmitt-trigger inputs for noise immunity, and bidirectional data transfer using acknowledge polling. Its internal address counter supports current-address, random-address, and sequential read modes.
Memory is organized as 256 pages of 32 bytes each, enabling partial page writes and automatic address incrementing within a page. The device uses hardwired A0–A2 pins for up to eight-device bus addressing and includes an internal pull-down on unconnected WP for default write-enable behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8 bits), sufficient for firmware configuration tables or sensor calibration datasets. |
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct integration into 3.3 V and 5 V logic systems without level-shifting. |
| I²C Clock Frequency | 100 kHz maximum at 2.7 V - ensures reliable communication in noise-sensitive industrial environments. |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write commands; impacts real-time logging latency. |
| Endurance | 1 million write cycles - supports daily reconfiguration over 27 years before wear-out. |
| Data Retention | 100 years at +25°C - guarantees long-term storage integrity for infrequently updated system parameters. |
| Standby Current | 0.5 µA max at 2.7 V - minimizes battery drain in always-on edge devices with infrequent EEPROM access. |
Pinout & Package
AT24C64-10PC-2.7 is supplied in an 8-pin JEDEC PDIP (0.300" wide) package, suitable for breadboard evaluation and legacy PCB layouts requiring through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating to configure one of eight unique I²C addresses (0x50–0x57); floating defaults to logic low. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; shares bus with other I²C peripherals. |
| SCL | Serial Clock Input | Master-generated clock; rising edge samples data, falling edge drives data; Schmitt-triggered for noise rejection. |
| WP | Write Protect Control | Logic high disables writes to upper 16 Kbits (quadrant protection); floating or low enables full memory access. |
| GND | Ground Reference | System common return path; must be low-impedance to ensure stable I²C signaling and EEPROM operation. |
| VCC | Power Supply | Accepts 2.7–5.5 V; internal regulation ensures consistent timing and write performance across voltage range. |
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 by >75% vs. byte-wise writes. |
| Schmitt-trigger, filtered inputs | Rejects sub-100 ns noise spikes on SDA/SCL, eliminating spurious start/stop conditions in electrically noisy factory-floor environments. |
| Hardware write protection (WP) | Physically blocks writes to top 16 Kbits when tied to VCC - prevents accidental corruption of critical boot or security parameters. |
| Self-timed write cycle | Automatically manages internal charge-pump timing; host MCU need not poll status or insert fixed delays before next command. |
| 1.8–5.5 V supply flexibility | Same part number supports migration from 5 V legacy designs to 3.3 V or 2.7 V low-power systems without layout changes. |
Applications
| Industrial Sensor Node | Medical Device Calibration |
|---|---|
Use Scenario: Remote temperature/humidity sensor node powered by coin cell, storing hourly readings and device ID. IC Role / Device Role / Timing Role: Nonvolatile parameter and log storage; retains data during power loss; accessed via I²C at 100 kHz during wake-up intervals. Use Value: 0.5 µA standby current extends battery life beyond 5 years; 100-year data retention ensures calibration history remains intact over product lifetime. | Use Scenario: Portable blood glucose meter storing user-specific calibration curves and usage history. IC Role / Device Role / Timing Role: Secure configuration storage; WP pin permanently tied to VCC to lock calibration coefficients against runtime overwrite. Use Value: Hardware write protection prevents accidental or malicious alteration of medical accuracy-critical data, supporting IEC 62304 compliance. |
| PLC I/O Module | Smart Energy Meter |
Use Scenario: DIN-rail mounted programmable logic controller module retaining I/O mapping and alarm thresholds across power cycles. IC Role / Device Role / Timing Role: Configuration EEPROM; accessed during boot via microcontroller's I²C peripheral; tolerant of 2.7–5.5 V rail variation. Use Value: 2.7 V minimum operating voltage ensures reliable startup even under brownout conditions common in industrial power distribution. | Use Scenario: Utility-grade electricity meter recording tariff schedules, tamper events, and cumulative kWh over decades. IC Role / Device Role / Timing Role: Long-term event logging storage; written infrequently but read on demand; endurance rated for 1M cycles. Use Value: 1 million write cycles support >27 years of daily event logging; 100-year data retention meets ANSI C12.20 and IEC 62056 requirements. |
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 64 Kbit capacity, 2.5–5.5 V range, SOIC-8 package; no -2.7 suffix - rated down to 2.5 V only. | Not qualified for 2.7 V minimum operation; unsuitable where VCC may dip to 2.7 V during brownout. | Select only if system VCC remains ≥2.5 V; verify timing margins at 2.5 V vs. AT24C64-10PC-2.7's guaranteed 2.7 V spec. |
| BR24G64FJ-WE2 | Rohm 64 Kbit I²C EEPROM; 1.7–5.5 V range; TSSOP-8; supports 400 kHz at ≥2.5 V but only 100 kHz at 1.7–2.4 V. | Wider voltage range but lower 100 kHz guarantee starts at 1.7 V - different low-voltage timing envelope. | Valid alternative if board uses TSSOP-8 footprint and system operates ≥1.7 V; confirm AC timing compliance at actual VCC. |
Compared with AT24C64-10PC-2.7, AT24C64D-SSHM-T lacks guaranteed 2.7 V operation, while BR24G64FJ-WE2 offers broader voltage coverage but requires validation of 100 kHz timing at the exact system VCC - making AT24C64-10PC-2.7 the most robust choice for 2.7 V–5.5 V industrial designs demanding proven low-voltage I²C reliability.
Availability
AT24C64-10PC-2.7 is available at Aetrix Electronics and suitable for industrial control panels, medical diagnostics equipment, and smart energy meters requiring stable component supply across extended temperature and voltage ranges.
Supply support for AT24C64-10PC-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 specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on reliability and long-term product support.
The AT24C64-10PC-2.7 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems requiring robust, field-proven nonvolatile storage with minimal board space and wiring.
FAQ
What is the minimum supply voltage required for reliable operation of the AT24C64-10PC-2.7?
The AT24C64-10PC-2.7 is specified for reliable operation down to 2.7 V across its commercial temperature range (0°C to +70°C). This is explicitly defined in the ordering code suffix "-2.7", and confirmed by DC characteristics tables showing ISB3 = 0.5 µA max at VCC = 2.7 V. Operation below 2.7 V is not guaranteed and may result in failed writes or invalid reads.
Does the AT24C64-10PC-2.7 support 400 kHz I²C communication?
No, the AT24C64-10PC-2.7 does not support 400 kHz I²C communication. Per the AC Characteristics table, its maximum clock frequency is 100 kHz when operating at 2.7 V (or 2.5 V/1.8 V). The 400 kHz rating applies only to the standard 5.0 V version (e.g., AT24C64-10PC), not the -2.7 variant.
How many devices can share the same I²C bus with the AT24C64-10PC-2.7?
Up to eight AT24C64-10PC-2.7 devices can share a single I²C bus. This is enabled by the three hardware address pins (A0, A1, A2), each configurable as logic high or low, yielding 2³ = 8 unique 7-bit device addresses (0x50–0x57). All devices respond only to their assigned address, allowing scalable memory expansion without additional buses.
What happens when the WP pin is left unconnected on the AT24C64-10PC-2.7?
When the WP pin is left unconnected on the AT24C64-10PC-2.7, it is internally pulled down to GND, enabling full write access to all 64 Kbit of memory. This default behavior ensures functional operation without external components, though intentional write protection requires explicit connection of WP to VCC.
Is the AT24C64-10PC-2.7 compatible with the AT24C32 family in terms of pinout and software interface?
Yes, the AT24C64-10PC-2.7 is pin-compatible and functionally compatible with the AT24C32 family in PDIP-8 packaging: identical pin assignments (A0–A2, SDA, SCL, WP, VCC, GND), same I²C protocol, and overlapping voltage/timing specs. Software drivers written for AT24C32-10PC-2.7 will operate without modification, though memory addressing must accommodate the larger 8192-word space.
AT24C64-10PC-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT24C64-10PC-2.7 FAQ
1.How can I place an order for AT24C64-10PC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64-10PC-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 AT24C64-10PC-2.7 reliable?
The price and inventory of AT24C64-10PC-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 AT24C64-10PC-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C64-10PC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64-10PC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64-10PC-2.7?
AT24C64-10PC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64-10PC-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 AT24C64-10PC-2.7?
For technical support, including AT24C64-10PC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64-10PC-2.7 requirements.
6.How does Aetrix verify that AT24C64-10PC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C64-10PC-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 AT24C64-10PC-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C64-10PC-2.7?
All AT24C64-10PC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64-10PC-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 AT24C64-10PC-2.7 part is unused and in its original packaging.
Return procedure for AT24C64-10PC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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