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Microchip Technology AT24C64AN-10SI-1.8-T
- Part No.:
- AT24C64AN-10SI-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C64AN-10SI-1.8-T.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,715
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Product details
Overview
AT24C64AN-10SI-1.8-T from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8 V to 5.5 V, supports 400 kHz clock rate at 1.8 V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial sensor calibration storage and firmware parameter backup where space-constrained, battery-sensitive designs require nonvolatile memory.
For engineers reviewing the AT24C64AN-10SI-1.8-T datasheet, AT24C64AN-10SI-1.8-T pinout, AT24C64AN-10SI-1.8-T application, or AT24C64AN-10SI-1.8-T equivalent, this page provides verified electrical specs, JEDEC SOIC-8 package details, noise-immune I²C interface behavior, and validated alternatives for automotive-grade, extended-temperature design-in.
Technical Context
The AT24C64AN-10SI-1.8-T implements a standard two-wire (I²C) serial interface with open-drain SDA and Schmitt-triggered SCL inputs, enabling robust multi-drop bus operation up to eight devices using A0–A2 address pins. Its internal architecture organizes 65,536 bits as 256 pages of 32 bytes each, supporting both byte and partial-page writes.
It uses an internally timed 5 ms max write cycle, supports acknowledge polling for host synchronization, and incorporates capacitive coupling-aware internal pull-downs on floating A0–A2 and WP pins. The device meets automotive-grade reliability standards with -40°C to +85°C industrial temperature range and lead-free/halogen-free construction per ordering suffix -1.8-T.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8), enabling storage of configuration tables or calibration coefficients for mid-complexity microcontrollers. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V logic families without level shifters. |
| I²C Clock Rate | 400 kHz at 1.8 V - enables fast parameter updates while maintaining compatibility with legacy 100 kHz controllers. |
| Write Endurance | 1 million cycles - suitable for applications requiring frequent field-updatable settings (e.g., energy meter tariff tables). |
| Data Retention | 100 years at 25°C - ensures long-term validity of stored calibration or security keys across product lifetime. |
| Standby Current | 1.0 µA at 1.8 V - minimizes battery drain in always-on IoT edge nodes during sleep mode. |
| Page Write Size | 32-byte pages - reduces I²C transaction overhead when updating contiguous parameter blocks. |
Pinout & Package
AT24C64AN-10SI-1.8-T is housed in an 8-lead JEDEC SOIC (8S1) package: 0.150" wide, gull-wing leads, body dimensions 4.80–5.00 mm × 3.81–3.99 mm, 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Hardware Device Address Inputs | Enable up to eight AT24C64AN-10SI-1.8-T devices on one I²C bus; internally pulled down if left floating (capacitive coupling <3 pF). |
| SDA | Serial Data I/O (Open-Drain) | Bidirectional data line shared across multiple I²C slaves; requires external pull-up resistor (typically 2.2–10 kΩ). |
| SCL | Serial Clock Input (Schmitt-Triggered) | Master-generated clock with built-in noise filtering; tolerates slow edges and EMI common in industrial environments. |
| WP | Hardware Write Protect | Active-high signal: tied to VCC to lock entire memory against accidental writes; internally pulled down if floating. |
| VCC | Power Supply | Accepts 1.8–5.5 V; decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin for stable I²C timing. |
| GND | Ground Reference | Return path for all internal circuitry; must be connected to system ground plane with low-inductance trace. |
Key Features
| Feature | Design Value |
|---|---|
| 1.8 V I²C Operation | Full 400 kHz clock rate at 1.8 V supply - eliminates need for voltage translation in ultra-low-power MCU designs. |
| 32-Byte Page Write | Reduces I²C bus occupancy by >75% vs. sequential byte writes when storing arrays or structs. |
| Schmitt-Trigger Inputs | Suppresses noise-induced glitches on SCL/SDA - critical for reliable operation in motor-drive or power-conversion PCBs. |
| Self-Timed Write Cycle | Fixed 5 ms max internal erase/write time - simplifies host firmware timing; no external delay needed beyond tWR. |
| Hardware Write Protection | WP pin disables all write commands when high - prevents corruption during brown-out or reset sequences. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration Storage |
|---|---|
|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog front-end sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed at power-up via I²C; retains values across 10+ year deployments. Use Value: Eliminates manual recalibration; enables plug-and-play sensor replacement with pre-loaded compensation data. |
Use Scenario: Holding user-selectable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps. IC Role / Device Role / Timing Role: Secure, low-power memory for safety-critical settings; accessed only during setup or fault recovery. Use Value: Ensures treatment continuity after battery swap; meets IEC 62304 Class C data integrity requirements. |
| Automotive Body Control Module | Smart Energy Meter Firmware Backup |
|
Use Scenario: Saving seat/mirror position presets and lighting profiles in 12 V vehicle architectures with 1.8 V domain controllers. IC Role / Device Role / Timing Role: I²C slave storing user preferences; powered from local LDO; survives cold-cranking transients. Use Value: Enables seamless personalization across vehicle platforms using same MCU firmware binary. |
Use Scenario: Backing up meter firmware checksums and tariff schedules during grid voltage sags or communication outages. IC Role / Device Role / Timing Role: Fail-safe storage element with 1 µA standby current; retains data through 10-second AC loss. Use Value: Prevents firmware corruption during brownouts; supports remote OTA update rollback capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95640-DW DW | 400 kHz max at 2.5–5.5 V only; no 1.8 V support; SPI interface instead of I²C. | Requires MCU SPI peripheral and additional GPIO for chip select; incompatible with existing I²C bus topology. | Select only if board already uses SPI peripherals and 1.8 V operation is not required. |
| BR24G64FJ-WE2 | Same 64 Kbit size, 1.7–5.5 V range, and I²C interface; but rated for -40°C to +105°C (not +125°C) and lacks automotive qualification. | Suitable for commercial-grade consumer electronics but not for under-hood automotive modules requiring AEC-Q100 compliance. | Prefer for cost-sensitive industrial controls where extended temperature is not mandated. |
Compared with AT24C64AN-10SI-1.8-T, M95640-DW DW demands interface redesign due to SPI protocol mismatch, while BR24G64FJ-WE2 trades automotive qualification and full -40°C to +125°C operation for lower unit cost in non-automotive contexts.
Availability
AT24C64AN-10SI-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration storage, and automotive body control module applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT24C64AN-10SI-1.8-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 technical and manufacturing continuity for the AT24Cxx EEPROM family. The company specializes in secure, reliable microcontrollers and memory solutions for industrial and automotive markets.
AT24C64AN-10SI-1.8-T belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, noise-immune data logging in space-constrained embedded systems where endurance and data retention are mission-critical.
FAQ
What is the maximum I²C clock frequency supported by AT24C64AN-10SI-1.8-T at 1.8 V?
The AT24C64AN-10SI-1.8-T supports a maximum I²C clock frequency of 400 kHz when operating at 1.8 V, as confirmed in the AC Characteristics table of the official datasheet (3054N–SEEPR–2/04). This allows high-speed parameter loading without requiring voltage translation circuitry in 1.8 V systems.
Does AT24C64AN-10SI-1.8-T support hardware write protection, and how is it implemented?
Yes, AT24C64AN-10SI-1.8-T implements hardware write protection via the WP (Write Protect) pin. When WP is driven high to VCC, all write operations-including byte, page, and write-enable instructions-are inhibited. If left floating, the pin is internally pulled down to GND under low-capacitance conditions (<3 pF), enabling normal writes by default.
What package type is used for AT24C64AN-10SI-1.8-T, and what are its key mechanical dimensions?
AT24C64AN-10SI-1.8-T uses the 8-lead JEDEC SOIC (8S1) package: 0.150" wide body, 4.80–5.00 mm length, 3.81–3.99 mm width, and 1.27 mm lead pitch. Its gull-wing leads comply with IPC-7351B footprint standards and support reflow soldering per J-STD-020.
How many devices can share the same I²C bus with AT24C64AN-10SI-1.8-T, and what determines addressing?
Up to eight AT24C64AN-10SI-1.8-T devices can share one I²C bus using the A0, A1, and A2 address pins. Each pin can be hardwired to VCC or GND, generating a unique 3-bit hardware address that combines with the fixed 1010b prefix to form the full 7-bit device address required for I²C arbitration.
What is the write endurance and data retention specification for AT24C64AN-10SI-1.8-T?
The AT24C64AN-10SI-1.8-T guarantees 1 million write cycles and 100 years of data retention at 25°C, as characterized and documented in the datasheet's "High Reliability" section. These values are measured under standard conditions (5.0 V, 25°C, page-mode writes) and apply across the full 1.8–5.5 V operating range.
AT24C64AN-10SI-1.8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C64AN-10SI-1.8-T FAQ
1.How can I place an order for AT24C64AN-10SI-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64AN-10SI-1.8-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 AT24C64AN-10SI-1.8-T reliable?
The price and inventory of AT24C64AN-10SI-1.8-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C64AN-10SI-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C64AN-10SI-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64AN-10SI-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64AN-10SI-1.8-T?
AT24C64AN-10SI-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64AN-10SI-1.8-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 AT24C64AN-10SI-1.8-T?
For technical support, including AT24C64AN-10SI-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64AN-10SI-1.8-T requirements.
6.How does Aetrix verify that AT24C64AN-10SI-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C64AN-10SI-1.8-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 AT24C64AN-10SI-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C64AN-10SI-1.8-T?
All AT24C64AN-10SI-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64AN-10SI-1.8-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 AT24C64AN-10SI-1.8-T part is unused and in its original packaging.
Return procedure for AT24C64AN-10SI-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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