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Microchip Technology AT24C64A-10TI-2.7-T
- Part No.:
- AT24C64A-10TI-2.7-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C64A-10TI-2.7-T.pdf
- Description:
- IC EEPROM 64KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,197
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Product details
Overview
AT24C64A-10TI-2.7-T 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 400 kHz clock rate at 1.8V–3.6V, hardware write protection via WP pin, and 32-byte page write mode. It is used in industrial control systems for parameter storage and calibration data retention.
For engineers reviewing the AT24C64A-10TI-2.7-T datasheet, AT24C64A-10TI-2.7-T pinout, AT24C64A-10TI-2.7-T application, or AT24C64A-10TI-2.7-T equivalent, key selection considerations include its TSSOP-8 package, -40°C to +85°C industrial temperature range, 1 million write cycles endurance, 100-year data retention, and compatibility with 2-wire bus systems supporting up to eight cascaded devices.
Technical Context
The AT24C64A-10TI-2.7-T implements a standard I²C protocol with Schmitt-triggered, noise-filtered SDA and SCL inputs, bidirectional open-drain data transfer, and address decoding via A0–A2 pins enabling up to eight devices on one bus. It supports byte and page write modes with self-timed internal write cycles.
Its memory architecture consists of 256 pages of 32 bytes each, requiring a 13-bit word address for random access. The device enters low-power standby mode after STOP condition receipt and features acknowledge polling for write cycle completion detection without busy-wait delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 65,536 bits (8192 × 8), sufficient for storing firmware configuration tables or sensor calibration coefficients in embedded controllers. |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting. |
| Max Clock Frequency | 400 kHz at 1.8V–3.6V - enables fast parameter updates in real-time systems while maintaining noise immunity. |
| Write Endurance | 1 million cycles - supports frequent logging or counter updates in industrial monitoring applications. |
| Data Retention | 100 years at 25°C - ensures long-term reliability for unattended equipment and field-deployed devices. |
| Page Write Size | 32 bytes per page - allows efficient bulk writes of structured data blocks such as CAN message buffers or display font segments. |
| Standby Current | 2.0 µA at 2.7V - minimizes power draw in battery-backed or energy-harvesting systems during idle periods. |
Pinout & Package
AT24C64A-10TI-2.7-T uses an 8-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, body size 3.0 mm × 4.4 mm × 1.05 mm max height, lead pitch 0.65 mm, gull-wing leads.
| 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 (0x50–0x57); enables multi-device bus sharing. |
| SDA | Serial Data I/O | Bidirectional open-drain line requiring external pull-up; supports wire-OR with other I²C peripherals on same bus segment. |
| SCL | Serial Clock Input | Master-generated clock signal; timing parameters meet I²C standard for 100/400 kHz operation with noise filtering. |
| WP | Hardware Write Protect | Logic-high disables all write operations - prevents accidental overwrites during power-up or firmware updates. |
| VCC | Power Supply | 2.7V–5.5V input; decoupling capacitor required near pin to suppress switching noise on shared supply rails. |
| GND | Ground Reference | Common return path for all internal circuitry; must be low-impedance connection to avoid ground bounce during write cycles. |
Key Features
| Feature | Design Value |
|---|---|
| 2-Wire Serial Interface | Reduces PCB routing complexity and pin count vs SPI; compatible with microcontrollers lacking dedicated EEPROM interfaces. |
| Schmitt Trigger Inputs | Improves noise immunity on SDA/SCL lines in electrically noisy industrial environments (e.g., motor drives, PLCs). |
| 32-Byte Page Write Mode | Enables burst writes of contiguous data without repeated address setup - cuts I²C transaction overhead by ~75% vs byte writes. |
| Self-Timed Write Cycle | Eliminates need for fixed delay timers in host firmware; write completion verified via ACK polling instead of hardcoded timeouts. |
| Automotive-Grade Options Available | Same die design supports extended temp (-40°C to +125°C) and halogen-free variants - simplifies qualification for automotive subsystems. |
Applications
| Industrial PLC Configuration Storage | Smart Meter Calibration Data |
|---|---|
Use Scenario: Storing user-defined I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during boot or runtime reconfiguration. Use Value: Enables field-upgradable control logic without firmware reflashing; retains settings across power loss. | Use Scenario: Holding metrology calibration constants, tariff schedules, and tamper-event logs in electricity/water/gas meters. IC Role / Device Role / Timing Role: Secure, long-life data vault synchronized with metering IC via I²C during initialization. Use Value: Meets ANSI C12.22 and IEC 62056 requirements for 100-year data integrity and 1M-cycle field update capability. |
| Medical Device Settings Backup | Automotive Body Control Module NVM |
Use Scenario: Preserving therapy profiles, alarm limits, and usage history in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Fail-safe configuration store accessed during power-on self-test and clinical mode transitions. Use Value: Ensures regulatory compliance with IEC 62304 software safety classification for Class B/C devices. | Use Scenario: Storing seat position memory, mirror presets, and lighting configuration in vehicle body control units. IC Role / Device Role / Timing Role: Low-power I²C slave supporting infrequent writes and high-read-frequency access during vehicle startup. Use Value: Supports ASIL-B functional safety requirements through predictable write timing and hardware write lock. |
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 64Kbit capacity, 1.7–5.5V supply, but rated for -40°C to +105°C; uses SOIC-8 (8S1) not TSSOP-8. | Preferred where wider temperature margin needed but board layout accommodates SOIC footprint. | Select when thermal derating is critical and SOIC package is acceptable; verify pinout alignment with existing PCB land pattern. |
| BR24G64FJ-WE2 | 64Kbit I²C EEPROM, 1.6–5.5V, 400 kHz, but uses 8-pin TDFN (2.0 × 2.5 mm) - smaller than TSSOP and no exposed pad. | Used in space-constrained consumer electronics where ultra-compact footprint outweighs TSSOP handling advantages. | Choose for miniaturized designs requiring <5 mm² area; requires rework of solder stencil and pick-and-place programming. |
Compared with M24C64-WMN6TP and BR24G64FJ-WE2, the AT24C64A-10TI-2.7-T offers identical electrical performance in a JEDEC-standard TSSOP-8 package optimized for automated assembly and thermal dissipation in industrial ambient conditions.
Availability
AT24C64A-10TI-2.7-T is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device manufacturing requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT24C64A-10TI-2.7-T 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 product continuity, quality assurance, and technical documentation for the AT24Cxx family.
The AT24C64A-10TI-2.7-T belongs to Microchip's serial EEPROM product line, designed specifically for reliable nonvolatile data storage in resource-constrained embedded systems where low voltage operation, high endurance, and I²C simplicity are essential.
FAQ
What is the maximum I²C clock frequency supported by the AT24C64A-10TI-2.7-T?
The AT24C64A-10TI-2.7-T supports up to 400 kHz clock frequency across its full 1.8V–3.6V VCC range. At 2.7V–5.5V operation, it maintains 400 kHz capability per AC characteristics table. This enables faster parameter writes compared to legacy 100 kHz EEPROMs while preserving noise immunity through built-in Schmitt triggers and input filtering.
Does the AT24C64A-10TI-2.7-T require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C64A-10TI-2.7-T 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, 3.3V) to 10 kΩ (for 100 kHz, 5V), selected based on bus capacitance and rise time requirements specified in the I²C standard. The AT24C64A-10TI-2.7-T itself does not integrate pull-ups.
How many devices can share the same I²C bus with the AT24C64A-10TI-2.7-T?
Up to eight AT24C64A-10TI-2.7-T devices can share a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit device addresses (0x50–0x57). Each pin can be tied HIGH, LOW, or left floating (internally pulled down), allowing flexible addressing without additional hardware. This scalability supports modular system architectures with distributed storage nodes.
What is the write protection mechanism of the AT24C64A-10TI-2.7-T?
The AT24C64A-10TI-2.7-T uses a dedicated WP (Write Protect) pin: when driven HIGH to VCC, it disables all write operations including byte, page, and sequential writes. When grounded or floating (internally pulled down), normal write functionality is enabled. This hardware-level lock prevents inadvertent corruption during power transitions or firmware errors - a critical feature for AT24C64A-10TI-2.7-T deployments in safety-critical systems.
Is the AT24C64A-10TI-2.7-T suitable for automotive applications?
The base AT24C64A-10TI-2.7-T is qualified for industrial temperature range (-40°C to +85°C) and is not automotive-grade. However, Microchip offers pin-compatible automotive variants (e.g., AT24C64A-10TQ-2.7) rated to -40°C to +125°C with AEC-Q100 qualification. For automotive use, specify the Q-grade part; the AT24C64A-10TI-2.7-T remains appropriate for under-hood-adjacent or cabin-control modules meeting industrial specs.
AT24C64A-10TI-2.7-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C64A-10TI-2.7-T FAQ
1.How can I place an order for AT24C64A-10TI-2.7-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64A-10TI-2.7-T 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-10TI-2.7-T reliable?
The price and inventory of AT24C64A-10TI-2.7-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C64A-10TI-2.7-T is usually 5 days.
3.What payment methods are accepted for AT24C64A-10TI-2.7-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64A-10TI-2.7-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64A-10TI-2.7-T?
AT24C64A-10TI-2.7-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64A-10TI-2.7-T 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-10TI-2.7-T?
For technical support, including AT24C64A-10TI-2.7-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64A-10TI-2.7-T requirements.
6.How does Aetrix verify that AT24C64A-10TI-2.7-T is sourced from the original manufacturer or authorized distributors?
All AT24C64A-10TI-2.7-T 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-10TI-2.7-T meets industry standards.
7.What is the process for return or replacement of AT24C64A-10TI-2.7-T?
All AT24C64A-10TI-2.7-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64A-10TI-2.7-T, 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-10TI-2.7-T part is unused and in its original packaging.
Return procedure for AT24C64A-10TI-2.7-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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