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Microchip Technology AT24C64W-10SI-2.5
- Part No.:
- AT24C64W-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C64W-10SI-2.5.pdf
- Description:
- IC EEPROM 64KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,682
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Product details
Overview
AT24C64W-10SI-2.5 from Microchip Technology (formerly Atmel) is a 64 Kbit (8192 × 8) serial EEPROM with I²C-compatible 2-wire interface, operating from 2.5V to 5.5V, featuring 32-byte page write mode, 10 ms max write cycle time, and hardware write protection via WP pin. It is used for nonvolatile parameter storage in industrial control modules requiring extended temperature reliability.
For engineers reviewing the AT24C64W-10SI-2.5 datasheet, AT24C64W-10SI-2.5 pinout, AT24C64W-10SI-2.5 application, or AT24C64W-10SI-2.5 equivalent, key selection considerations include VCC range compatibility (2.5–5.5 V), industrial temperature rating (−40°C to +85°C), 100 kHz I²C speed at 2.5 V, standby current of 0.5 µA, and TSSOP-8 package footprint constraints.
Technical Context
The AT24C64W-10SI-2.5 implements a standard I²C protocol with Schmitt-triggered SDA/SCL inputs for noise immunity, supports up to eight devices on one bus via A0–A2 address pins, and uses open-drain bidirectional data transfer. Its internal memory is organized as 256 pages of 32 bytes each, enabling partial-page writes without erasing adjacent data.
Write protection is implemented via the WP pin: tied high to VCC, it inhibits writes to the upper quadrant (16 Kbits); tied low or floating, full memory access is enabled. The device enters standby mode automatically after STOP condition receipt and supports acknowledge polling to detect write completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64 Kbit (8192 × 8 bits), sufficient for firmware calibration tables or device configuration profiles in embedded systems |
| Supply Voltage Range | 2.5 V to 5.5 V - enables direct interfacing with 2.5 V logic domains and backward compatibility with 3.3 V/5 V microcontrollers |
| Interface Protocol | I²C-compatible 2-wire serial - requires only two MCU GPIOs (SCL/SDA), no additional level-shifting needed within voltage range |
| Max Clock Frequency | 100 kHz at 2.5 V - defines maximum sustained data throughput (≈10 KB/s effective) for reliable operation under low-voltage conditions |
| Write Cycle Time | 10 ms maximum - determines minimum interval between successive write commands; impacts real-time logging latency |
| Endurance | 1 million write cycles - supports frequent parameter updates over product lifetime (e.g., energy meter tariff changes) |
| Data Retention | 100 years at +25°C - ensures long-term integrity of stored calibration or security keys without refresh |
Pinout & Package
AT24C64W-10SI-2.5 is housed in an 8-pin TSSOP package (JEDEC MO-153, 3.0 mm × 4.4 mm body, 0.65 mm pitch), optimized for space-constrained industrial PCB layouts.
| 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 | Bidirectional open-drain line - requires external pull-up; shares bus with other I²C peripherals |
| SCL | Serial Clock Input | Master-generated clock - controls timing of all read/write transfers; Schmitt trigger improves noise margin |
| WP | Write Protect Control | Active-high signal: high = lock upper 16 Kbits; low or floating = full write access |
| VCC | Power Supply | 2.5–5.5 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 |
|---|---|
| Low-Voltage Operation | Functional down to 2.5 V supply - eliminates need for voltage translators in mixed-supply systems |
| Hardware Write Protection | WP pin directly disables writes to top memory quadrant - prevents accidental corruption of critical boot parameters |
| Page Write Mode | 32-byte burst writes reduce I²C transaction overhead by >75% vs. byte-by-byte writes |
| Industrial Temperature Range | −40°C to +85°C operation - validated for deployment in motor drives, PLC I/O modules, and outdoor gateways |
| Noise Immunity | Schmitt-trigger inputs + 100 ns noise suppression filter - sustains reliable communication in electrically noisy factory environments |
Applications
| Industrial Sensor Calibration | Smart Meter Firmware Storage |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibration constants accessed at power-up before ADC initialization. Use Value: Enables field-replaceable sensor modules without recalibration; leverages 100-year data retention for lifetime accuracy. |
Use Scenario: Holding tariff schedules, billing registers, and cryptographic keys in electricity/water meters deployed for >15 years. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory for time-critical billing data updated daily via HAN communication. Use Value: 1M endurance supports daily write cycles for 2,700+ days; WP pin prevents unauthorized firmware modification. |
| Medical Device Configuration | Automotive Body Control Module |
Use Scenario: Saving user preferences (e.g., display brightness, alarm thresholds) and device-specific calibration in portable diagnostic tools. IC Role / Device Role / Timing Role: Persistent settings store accessed during boot sequence; retains values across battery removal. Use Value: 2.5 V operation allows direct connection to Li-ion battery rails; 0.5 µA standby current extends battery life. |
Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive interior control units. IC Role / Device Role / Timing Role: I²C slave storing user-defined configurations written during vehicle personalization routines. Use Value: Industrial-grade temperature rating ensures reliability in cabin environments reaching +85°C; TSSOP-8 eases automated assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95640-WMN6TP | 400 kHz SPI interface, 2.5–5.5 V, SO8 package; no WP pin - write protection handled via software status register | Requires SPI-capable MCU; lacks hardware-level WP for safety-critical memory locking | Choose when higher throughput (400 kHz) is needed and SPI is preferred over I²C |
| BR24G64FJ-WE2 | 64 Kbit I²C EEPROM, 1.7–5.5 V, TSSOP8, 1 MHz max clock at 5 V; built-in error correction code (ECC) | Supports faster I²C speeds and includes ECC for enhanced data integrity in harsh EMI environments | Choose when system-level fault tolerance exceeds AT24C64W-10SI-2.5's specification, especially in automotive ADAS proximity sensors |
Compared with M95640-WMN6TP and BR24G64FJ-WE2, the AT24C64W-10SI-2.5 offers deterministic hardware write protection and proven industrial temperature stability without added complexity, making it optimal for cost-sensitive, safety-aware industrial control designs where I²C bandwidth ≤100 kHz suffices.
Availability
AT24C64W-10SI-2.5 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical diagnostics requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT24C64W-10SI-2.5 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 components, and nonvolatile memory solutions, with a focus on reliability and long-term product support.
The AT24C64W-10SI-2.5 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for robust, low-power, pin-efficient nonvolatile storage in industrial and automotive subsystems.
FAQ
What is the operating temperature range for AT24C64W-10SI-2.5?
The AT24C64W-10SI-2.5 is rated for industrial temperature operation from −40°C to +85°C. This range is validated per its ordering code suffix "SI" and applies across the full 2.5 V to 5.5 V supply range. It meets JEDEC JESD22-A108 requirements for temperature cycling and high-temperature operating life, making it suitable for deployment in motor control cabinets and outdoor utility equipment where ambient extremes occur.
Does AT24C64W-10SI-2.5 support 400 kHz I²C communication?
No, AT24C64W-10SI-2.5 supports up to 100 kHz I²C clock frequency when operating at 2.5 V, as specified in its DC and AC characteristics tables. While higher-speed variants like AT24C64-10PI exist for 5 V operation (400 kHz), the "-2.5" suffix denotes the 2.5 V optimized version with timing parameters characterized only for 100 kHz - attempting 400 kHz may result in setup/hold violations and data corruption.
How does the WP pin function on AT24C64W-10SI-2.5?
On AT24C64W-10SI-2.5, the WP (Write Protect) pin is active-high: when tied to VCC, it disables write access to the upper quadrant (16 Kbits) of memory; when grounded or left floating (internally pulled down), full memory write capability is enabled. This hardware-level protection operates independently of I²C commands and cannot be overridden by software, providing fail-safe safeguarding of critical configuration data.
What package type is used for AT24C64W-10SI-2.5?
AT24C64W-10SI-2.5 uses an 8-pin TSSOP package (JEDEC MO-153), with 3.0 mm × 4.4 mm body dimensions and 0.65 mm lead pitch. This surface-mount package provides thermal and mechanical robustness for reflow soldering, and its compact footprint supports high-density PCB layouts typical in industrial gateway and sensor node designs.
Can AT24C64W-10SI-2.5 be used with 1.8 V microcontrollers?
No, AT24C64W-10SI-2.5 is not rated for 1.8 V operation. Its "-2.5" suffix specifies a minimum VCC of 2.5 V. For 1.8 V systems, Microchip offers the AT24C64W-10SI-1.8 variant, which is characterized down to 1.8 V and features lower standby current (0.1 µA). Using AT24C64W-10SI-2.5 below 2.5 V risks unreliable I²C signaling, incomplete writes, and potential data corruption.
AT24C64W-10SI-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm 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:
- 10ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C64W-10SI-2.5 FAQ
1.How can I place an order for AT24C64W-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C64W-10SI-2.5 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 AT24C64W-10SI-2.5 reliable?
The price and inventory of AT24C64W-10SI-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C64W-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C64W-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C64W-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C64W-10SI-2.5?
AT24C64W-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C64W-10SI-2.5 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 AT24C64W-10SI-2.5?
For technical support, including AT24C64W-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C64W-10SI-2.5 requirements.
6.How does Aetrix verify that AT24C64W-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C64W-10SI-2.5 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 AT24C64W-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C64W-10SI-2.5?
All AT24C64W-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C64W-10SI-2.5, 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 AT24C64W-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT24C64W-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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