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Microchip Technology AT24C64A-10TI-1.8
- Part No.:
- AT24C64A-10TI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C64A-10TI-1.8.pdf
- Description:
- IC EEPROM 64KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,149
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Product details
Overview
AT24C64A-10TI-1.8 from Microchip Technology (formerly Atmel) is a 64 Kbit I²C-compatible serial EEPROM organized as 8192 × 8 bits, operating from 1.8 V to 5.5 V, featuring 400 kHz clock rate at 1.8 V, hardware write protection via WP pin, and 32-byte page write capability. It is used in embedded systems for parameter storage, calibration data retention, and configuration memory in industrial controllers and IoT edge nodes.
For engineers reviewing the AT24C64A-10TI-1.8 datasheet, AT24C64A-10TI-1.8 pinout, AT24C64A-10TI-1.8 application, or AT24C64A-10TI-1.8 equivalent, this page delivers verified electrical specs, JEDEC SOIC-8 package mapping, noise-suppressed I²C interface behavior, endurance (1M cycles), and real-world use cases aligned with automotive-grade reliability requirements.
Technical Context
The AT24C64A-10TI-1.8 implements a standard two-wire I²C bus interface with Schmitt-triggered SDA/SCL inputs for robust noise immunity, supports up to eight devices on one bus via A0–A2 address pins, and uses open-drain bidirectional SDA with internal pull-down biasing on floating address/write-protect pins. Its 32-byte page architecture enables partial writes without erasing full pages.
It operates across –40°C to +85°C industrial temperature range, features self-timed 5 ms max write cycle, and maintains data integrity for 100 years. The device enters low-power standby mode after STOP condition completion or power-up, drawing only 1.0 µA at 1.8 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8), enabling storage of firmware flags, sensor offsets, or user settings in space-constrained designs |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V logic families and legacy 3.3/5 V microcontrollers |
| I²C Clock Rate | 400 kHz at 1.8 V - ensures fast configuration loading without requiring level-shifting circuitry |
| Write Endurance | 1 million cycles - suitable for dynamic logging applications like energy meter tariff updates or HVAC runtime counters |
| Data Retention | 100 years at 25°C - guarantees long-term validity of calibration coefficients and security keys |
| Page Write Size | 32 bytes - allows efficient bulk updates (e.g., storing 8-channel ADC calibration tables per page) |
| Standby Current | 1.0 µA @ 1.8 V - minimizes battery drain in always-on portable or remote monitoring devices |
Pinout & Package
AT24C64A-10TI-1.8 is supplied in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide, with gull-wing leads and standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating (internally pulled down); enable up to 8 devices on same I²C bus |
| SDA | Serial Data I/O | Bidirectional open-drain line - requires external pull-up; supports wire-OR with other I²C peripherals |
| SCL | Serial Clock Input | Positive-edge clock-in / negative-edge clock-out - defines timing for all read/write transactions |
| WP | Hardware Write Protect | Logic high disables all writes - prevents accidental overwrites during power transitions or firmware updates |
| VCC | Power Supply | 1.8–5.5 V input - powers internal logic and memory array; decoupling capacitor required near pin |
| GND | Ground Reference | Return path for all internal currents; must be low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| 1.8 V operation with 400 kHz I²C | Enables direct integration into ultra-low-power 1.8 V SoC subsystems without voltage translation |
| Schmitt-triggered SDA/SCL inputs | Rejects >100 ns noise spikes - eliminates false start/stop detection in electrically noisy industrial environments |
| 32-byte page write with rollover | Allows partial-page updates without erasing adjacent data - critical for atomic configuration saves |
| Internal address counter roll-over | Supports seamless sequential reads across page boundaries - simplifies firmware buffer management |
| Write cycle time ≤5 ms | Minimizes bus blocking duration - improves system responsiveness during non-volatile parameter updates |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing I/O mapping, alarm thresholds, and communication protocol parameters in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Non-volatile configuration memory accessed via I²C during boot and runtime reconfiguration; no timing-critical latency requirement. Use Value: Ensures deterministic startup behavior after power loss and supports field-upgradable logic configurations without firmware reflashing. | Use Scenario: Retaining seat position presets, mirror angle calibrations, and door lock status history in 12 V automotive BCMs with 1.8 V domain controllers. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced to 1.8 V MCU core; WP pin tied to ignition signal for write-protection during engine cranking. Use Value: Survives cold-cranking voltage dips (down to 6 V system) while maintaining data integrity across 15+ year vehicle lifetimes. |
| Smart Energy Meter Firmware Flags | Medical Infusion Pump Calibration Data |
Use Scenario: Recording tariff switch events, tamper-detection logs, and metrology calibration offsets in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: High-reliability data logger using page writes to append timestamped events; accessed asynchronously via I²C interrupt handler. Use Value: Meets ANSI 1.0 million write cycle requirement for utility-grade meters and retains data through 100-year shelf life without refresh. | Use Scenario: Storing flow-rate calibration coefficients, motor step compensation tables, and safety-critical usage counters in Class II medical infusion pumps. IC Role / Device Role / Timing Role: Safety-isolated configuration store; WP pin controlled by watchdog timer to prevent unauthorized writes during fault conditions. Use Value: Complies with IEC 62304 software lifecycle requirements for permanent data retention and traceable calibration history. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics M24C64-WMN6TP | Same 64 Kbit size, 1.8–5.5 V, 400 kHz I²C, but rated for –40°C to +105°C; slightly higher ISB (2.0 µA @ 1.8 V) | Preferred for extended-temperature industrial gateways where ambient exceeds 85°C | Select when operating above +85°C ambient or requiring ST's qualified automotive AEC-Q100 Grade 2 variant |
| ON Semiconductor CAT24C64WI-GT3 | Identical pinout and 1.8 V operation, but specifies tWR = 10 ms (max) vs. 5 ms; lower endurance (400k cycles) | Suitable for cost-sensitive consumer electronics where write frequency is infrequent | Choose for BOM cost reduction where write speed and endurance margins are relaxed |
Compared with M24C64-WMN6TP, AT24C64A-10TI-1.8 offers faster write cycles and tighter standby current, while CAT24C64WI-GT3 trades performance for lower unit cost - making AT24C64A-10TI-1.8 optimal for industrial designs demanding both speed and longevity at 1.8 V.
Availability
AT24C64A-10TI-1.8 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, and smart energy meters requiring stable component supply, long-lifecycle support, and guaranteed 1.8 V compatibility.
Supply support for AT24C64A-10TI-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 non-volatile memory solutions, with a focus on reliability, longevity, and embedded system integration.
The AT24Cxx family was designed specifically for low-voltage, low-power I²C-based configuration and data logging in industrial, automotive, and consumer applications - emphasizing robustness, ease of integration, and long-term data retention.
FAQ
What is the maximum I²C clock frequency supported by AT24C64A-10TI-1.8 at 1.8 V?
The AT24C64A-10TI-1.8 supports a maximum I²C clock frequency of 400 kHz when operated at 1.8 V, as confirmed in the AC Characteristics table of the official datasheet (3054N–SEEPR–2/04). This enables faster configuration reads compared to 100 kHz-only 1.8 V EEPROMs, reducing boot-time latency in resource-constrained systems.
Does AT24C64A-10TI-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C64A-10TI-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 speed; the device's Schmitt-trigger inputs ensure reliable signal detection even with slower rise times.
How does the WP pin function on AT24C64A-10TI-1.8, and what happens if it is left unconnected?
When WP is tied to VCC, all write operations to AT24C64A-10TI-1.8 are inhibited; when grounded, normal writes are enabled. If left floating, the WP pin is internally pulled down to GND - provided board coupling to VCC is <3 pF. For robustness, Microchip recommends hardwiring WP to GND or VCC rather than leaving it floating.
What is the memory organization of AT24C64A-10TI-1.8, and how many pages does it contain?
AT24C64A-10TI-1.8 is organized as 8192 words of 8 bits each (64 Kbit), structured into 256 pages of 32 bytes each. This page structure directly enables the 32-byte page write mode, allowing efficient multi-byte updates without erasing unrelated data within the same memory block.
Is AT24C64A-10TI-1.8 qualified for automotive applications?
AT24C64A-10TI-1.8 is specified for industrial temperature range (–40°C to +85°C) and carries automotive-grade qualification including lead-free/halogen-free construction, but it is not AEC-Q100 certified. For AEC-Q100 Grade 2 applications, Microchip offers the AT24C64A-10TU-1.8 variant - verify qualification status per specific automotive program requirements before design-in.
AT24C64A-10TI-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-10TI-1.8 FAQ
1.How can I place an order for AT24C64A-10TI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64A-10TI-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-10TI-1.8 reliable?
The price and inventory of AT24C64A-10TI-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-10TI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C64A-10TI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64A-10TI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64A-10TI-1.8?
AT24C64A-10TI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64A-10TI-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-10TI-1.8?
For technical support, including AT24C64A-10TI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64A-10TI-1.8 requirements.
6.How does Aetrix verify that AT24C64A-10TI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C64A-10TI-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-10TI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C64A-10TI-1.8?
All AT24C64A-10TI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64A-10TI-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-10TI-1.8 part is unused and in its original packaging.
Return procedure for AT24C64A-10TI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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