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Microchip Technology AT24C64A-10TU-1.8
- Part No.:
- AT24C64A-10TU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C64A-10TU-1.8.pdf
- Description:
- IC EEPROM 64KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,732
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Product details
Overview
AT24C64A-10TU-1.8 from Microchip Technology (formerly Atmel) is a 64 Kbit I²C-compatible serial EEPROM with 1.8 V to 5.5 V supply operation, 400 kHz interface speed, 32-byte page write capability, and hardware write protection via the WP pin. It delivers 1 million write cycles and 100-year data retention for nonvolatile configuration storage in embedded control systems.
For engineers reviewing the AT24C64A-10TU-1.8 datasheet, AT24C64A-10TU-1.8 pinout, AT24C64A-10TU-1.8 application, or AT24C64A-10TU-1.8 equivalent, key selection criteria include low-voltage 1.8 V operation, TSSOP-8 packaging, industrial temperature range (–40°C to +85°C), and compatibility with I²C-bus timing requirements per SMBus v2.0.
Technical Context
The AT24C64A-10TU-1.8 implements a two-wire serial interface compliant with standard I²C protocol, supporting bidirectional data transfer with Schmitt-triggered, noise-filtered SDA and SCL inputs. Its internal architecture organizes 65,536 bits as 8192 words × 8 bits across 256 pages of 32 bytes each.
Addressing uses three hardware-configurable pins (A0–A2) enabling up to eight devices on a shared bus, while the WP pin provides hardware-level memory write inhibition when driven high. The device enters standby mode after stop-bit reception and supports acknowledge polling during internal write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8-bit words), sufficient for firmware parameter tables or calibration data sets |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V logic and mixed-voltage systems without level shifters |
| I²C Clock Frequency | 400 kHz maximum - supports fast configuration loading in real-time control loops |
| Page Write Capacity | 32 bytes per page - reduces write transaction overhead versus byte-write-only EEPROMs |
| Write Endurance | 1 million cycles - suitable for dynamic logging or field-updatable settings in industrial equipment |
| Data Retention | 100 years at +25°C - ensures long-term reliability for unattended infrastructure deployments |
| Standby Current | 1.0 µA at 1.8 V - minimizes quiescent power in battery-backed or energy-harvesting applications |
Pinout & Package
AT24C64A-10TU-1.8 is housed in an 8-lead TSSOP package (JEDEC MO-153, 4.4 mm body width), RoHS-compliant and halogen-free, with lead finish specified as "U" (Green Package + RoHS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high to set LSB of 7-bit I²C slave address; enables multi-device bus topology |
| A1 | Device Address Input | Hardwired low/high to set middle bit of 7-bit I²C slave address; supports up to eight parallel devices |
| A2 | Device Address Input | Hardwired low/high to set MSB of 7-bit I²C slave address; required for cascaded EEPROM configurations |
| GND | Ground Reference | Primary return path for VCC and signal currents; must be low-impedance for noise immunity |
| VCC | Power Supply | 1.8 V to 5.5 V input; decoupling capacitor (0.1 µF) required within 10 mm of pin |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes; floating defaults to GND via internal pull-down |
| SCL | Serial Clock Input | Open-drain compatible I²C clock line; requires external pull-up; defines timing for data sampling |
| SDA | Serial Data I/O | Bidirectional open-drain data line; shared across multiple I²C peripherals; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| 1.8 V Operation | Enables direct integration with ultra-low-power microcontrollers (e.g., ARM Cortex-M0+) without voltage translation |
| Schmitt Trigger Inputs | Suppresses digital noise on SDA/SCL lines in electrically noisy environments like motor drives or PLCs |
| Hardware Write Protection | Prevents accidental overwrites during firmware updates or brown-out conditions via dedicated WP pin |
| Self-timed Write Cycle | Eliminates need for host MCU to manage erase/write timing; max 5 ms internal cycle completes autonomously |
| 32-byte Page Writes | Reduces I²C transaction count by >95% vs. byte-wise writes for block data storage (e.g., sensor calibration matrices) |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in environmental monitoring nodes. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed at boot via I²C; no timing-critical latency requirement. Use Value: Enables field-replaceable sensor modules with persistent calibration data independent of host MCU firmware version. | Use Scenario: Retaining tariff schedules, billing counters, and communication module credentials in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store updated infrequently but requiring guaranteed write integrity. Use Value: Meets IEC 62056-21 compliance for secure metering data retention across 10+ year service life. |
| Medical Device Settings Backup | Automotive Body Control Module |
Use Scenario: Preserving user-adjusted therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable drug pumps. IC Role / Device Role / Timing Role: Fail-safe storage element with 100-year retention; accessed only during power-up or settings change. Use Value: Supports FDA 21 CFR Part 11 audit trails by guaranteeing parameter persistence through battery replacement and firmware upgrades. | Use Scenario: Holding seat position memory, mirror presets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: Low-power configuration store active during vehicle sleep mode (1.0 µA standby current). Use Value: Maintains personalized settings across ignition cycles without draining 12 V battery during extended parking. |
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, 1.7–5.5 V range, TSSOP-8 package; newer revision with enhanced ESD rating (4 kV HBM) | Preferred for new designs targeting AEC-Q200 stress testing; identical pinout and timing | Select when higher robustness against board-level ESD events is required in automotive or industrial assembly lines |
| M95640-DFMN6TP | 64 Kbit SPI interface (not I²C); 1.8–5.5 V; SO8 package; 5 MHz max clock; no WP pin (software-protected only) | Requires SPI-capable MCU; lacks hardware write lock; faster sequential reads but incompatible bus protocol | Choose only if existing design uses SPI peripherals and I²C bus is unavailable or congested |
Compared with AT24C64A-10TU-1.8, AT24C64D-SSHM-T offers improved ESD tolerance while maintaining full functional and pinout compatibility, whereas M95640-DFMN6TP requires interface redesign due to SPI-only operation and absence of hardware write protection.
Availability
AT24C64A-10TU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, medical device settings backup, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for AT24C64A-10TU-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 memory solutions, with a focus on embedded control and connectivity.
The AT24C64A-10TU-1.8 belongs to Microchip's legacy serial EEPROM product line, designed for reliable, low-power nonvolatile storage in space-constrained industrial and commercial systems operating across wide voltage and temperature ranges.
FAQ
What is the maximum I²C clock frequency supported by the AT24C64A-10TU-1.8?
The AT24C64A-10TU-1.8 supports a maximum I²C clock frequency of 400 kHz across its full 1.8 V to 5.5 V supply range and industrial temperature range (–40°C to +85°C). This value is characterized and tested per Table 4 in the official datasheet (3054T–SEEPR–1/07), and applies to both read and write operations without derating.
Does the AT24C64A-10TU-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C64A-10TU-1.8 requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time; the device's Schmitt-trigger inputs tolerate slow edge rates, allowing flexibility in resistor selection for noise-prone environments.
How does the write protect (WP) pin function on the AT24C64A-10TU-1.8?
When the WP pin of the AT24C64A-10TU-1.8 is driven high to VCC, all write operations-including byte, page, and write-enable commands-are inhibited. If left floating, the pin is internally pulled down to GND (subject to PCB capacitive coupling <3 pF), enabling normal writes. This hardware lock operates independently of software state and remains active during power transitions.
What is the memory organization of the AT24C64A-10TU-1.8?
The AT24C64A-10TU-1.8 organizes its 65,536 bits as 8192 words of 8 bits each, arranged in 256 pages of 32 bytes. This structure enables efficient 32-byte page writes and supports random addressing using a 13-bit word address, with automatic rollover at page boundaries during sequential writes.
Is the AT24C64A-10TU-1.8 suitable for automotive applications?
No - the AT24C64A-10TU-1.8 is rated for industrial temperature range (–40°C to +85°C) and is not qualified to AEC-Q200. While it may function in some automotive subsystems, 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," including automotive safety-critical systems.
AT24C64A-10TU-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C64A-10TU-1.8 FAQ
1.How can I place an order for AT24C64A-10TU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64A-10TU-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-10TU-1.8 reliable?
The price and inventory of AT24C64A-10TU-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-10TU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C64A-10TU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64A-10TU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64A-10TU-1.8?
AT24C64A-10TU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64A-10TU-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-10TU-1.8?
For technical support, including AT24C64A-10TU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64A-10TU-1.8 requirements.
6.How does Aetrix verify that AT24C64A-10TU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C64A-10TU-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-10TU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C64A-10TU-1.8?
All AT24C64A-10TU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64A-10TU-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-10TU-1.8 part is unused and in its original packaging.
Return procedure for AT24C64A-10TU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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