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Microchip Technology AT24C32W-10SC-2.5
- Part No.:
- AT24C32W-10SC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C32W-10SC-2.5.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,465
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Product details
Overview
AT24C32W-10SC-2.5 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 2.5V to 5.5V, supports 100 kHz I²C bus speed, features hardware write protection via the WP pin, and delivers 1 million write cycles with 100-year data retention - used in industrial sensor calibration storage and power-meter firmware parameter backup.
For engineers reviewing the AT24C32W-10SC-2.5 datasheet, AT24C32W-10SC-2.5 pinout, AT24C32W-10SC-2.5 application, or AT24C32W-10SC-2.5 equivalent, key selection criteria include its 2.5V–5.5V supply range, 32-byte page write capability, Schmitt-triggered noise-immune inputs, and TSSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The AT24C32W-10SC-2.5 implements a standard two-wire I²C interface with open-drain SDA/SCL pins, device addressing via A0–A2 pins (supporting up to eight devices on one bus), and hardware-based write protection through the dedicated WP terminal. Its internal architecture organizes memory as 256 pages of 32 bytes each, enabling partial-page writes without erasing full pages.
It uses a self-timed internal write cycle (max 10 ms), supports acknowledge polling for write completion detection, and incorporates input filtering and Schmitt-trigger inputs to suppress noise on noisy industrial buses. The device defaults to GND-biased address pins when floating, ensuring predictable multi-device addressing behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for storing configuration tables or calibration coefficients in microcontroller-based edge nodes |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V logic without level shifters |
| I²C Bus Speed | 100 kHz maximum at 2.5V - ensures reliable timing margins in electrically noisy environments |
| Write Cycle Time | ≤10 ms - defines minimum interval between successive write commands; impacts firmware update latency |
| Endurance | 1,000,000 write cycles - supports frequent recalibration logging in industrial monitoring equipment |
| Data Retention | 100 years at +25°C - guarantees long-term validity of stored calibration or security keys without refresh |
| Standby Current | 0.5 µA max at 2.5V - critical for battery-powered IoT endpoints requiring ultra-low quiescent power |
Pinout & Package
AT24C32W-10SC-2.5 is housed in an 8-pin TSSOP package (JEDEC MO-153, 0.170" body width), optimized for automated assembly and high-density 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; internally pulled low when unconnected |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across multiple I²C devices; requires external pull-up resistor |
| SCL | Serial Clock Input | Master-generated clock signal synchronizing all data transfers; Schmitt-triggered for noise immunity |
| WP | Write Protect Control | Hardware-enforced lock: tied to VCC disables writes to upper quadrant (8K bits); tied to GND enables full memory access |
| VCC | Power Supply | Primary supply rail (2.5V–5.5V); powers internal logic and memory array |
| GND | Ground Reference | Common return path for all internal circuits and I/O signaling |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Valid down to 2.5V supply - eliminates need for voltage regulators in 2.5V system domains |
| 32-Byte Page Write | Enables efficient burst writes without erasing entire pages - reduces firmware update time by >90% vs. byte-by-byte writes |
| Schmitt-Trigger Inputs | Rejects fast transients and EMI-induced glitches on SDA/SCL - prevents spurious start/stop conditions in factory-floor environments |
| Hardware Write Protection | WP pin physically blocks writes to top 25% of memory - safeguards critical boot parameters from accidental overwrites |
| 100-Year Data Retention | Guarantees nonvolatile storage integrity across product lifetime - eliminates field recalibration requirements for sealed instruments |
Applications
| Smart Energy Meters | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs in utility-grade electricity meters operating continuously for 15+ years. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage IC interfaced via I²C to a Cortex-M3 energy-metering SoC. Use Value: 100-year data retention ensures calibration data remains valid across entire meter service life without field replacement. | Use Scenario: Holding module-specific configuration (e.g., analog input scaling, filter settings) and runtime diagnostics in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Serial EEPROM providing persistent parameter storage accessible during cold-start and firmware updates. Use Value: 0.5 µA standby current minimizes auxiliary power draw in always-on control cabinets with limited thermal budget. |
| Medical Diagnostic Sensors | Automotive Body Control Units |
Use Scenario: Saving sensor offset/gain coefficients and patient-specific calibration profiles in portable ultrasound transducers and blood glucose monitors. IC Role / Device Role / Timing Role: Low-power I²C EEPROM integrated into sensor subassembly PCBs for traceable calibration history. Use Value: 2.5V operation allows direct connection to 2.5V ADC reference rails, eliminating level-shifting components and board area. | Use Scenario: Storing seat-position memory, mirror-angle presets, and lighting configuration in automotive interior control modules. IC Role / Device Role / Timing Role: Automotive-grade serial EEPROM accessed during vehicle power-up to restore user preferences. Use Value: Hardware WP pin prevents unintended overwrites during CAN bus firmware updates, ensuring preset integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C32D-SSHM-T | Same 32K-bit capacity, 2.5V–5.5V range, but in 8-lead SOIC (JEDEC MS-012) instead of TSSOP; 100 kHz max speed | SOIC package offers easier manual rework and higher thermal mass; less suitable for fine-pitch automated assembly | Select when board-level repairability or legacy SOIC footprint compatibility is prioritized over space savings |
| M24C32-WMN6TP | STMicroelectronics 32K I²C EEPROM; 1.7V–5.5V supply, 400 kHz max speed at 5V, 1 µA standby at 2.5V | Higher speed at 5V and lower standby current, but lacks guaranteed 2.5V–5.5V 100 kHz operation across full temperature range | Select when system operates at 5V and requires faster writes, but verify timing compliance at 2.5V if dual-voltage support is needed |
Compared with AT24C32W-10SC-2.5, AT24C32D-SSHM-T trades compactness for manufacturability, while M24C32-WMN6TP offers speed and ultra-low standby at the cost of reduced 2.5V timing margin assurance - making AT24C32W-10SC-2.5 optimal for space-constrained, mixed-voltage industrial designs demanding guaranteed 100 kHz operation down to 2.5V.
Availability
AT24C32W-10SC-2.5 is available at Aetrix Electronics and suitable for smart metering, industrial PLCs, medical sensors, and automotive body control units requiring stable component supply across extended product lifecycles.
Supply support for AT24C32W-10SC-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 devices, and memory solutions, with a focus on reliability and long-term product support.
The AT24C32 series belongs to Microchip's serial EEPROM product line, designed specifically for robust, low-power, nonvolatile data storage in industrial, automotive, and medical applications where data integrity and extended temperature operation are essential.
FAQ
What is the maximum I²C clock frequency supported by AT24C32W-10SC-2.5?
The AT24C32W-10SC-2.5 supports a maximum I²C clock frequency of 100 kHz when operating within its 2.5V to 5.5V supply range. This specification is validated across the full industrial temperature range (−40°C to +85°C) and ensures timing margin compliance with noise-filtered inputs and Schmitt-triggered receivers. Higher speeds (e.g., 400 kHz) are only guaranteed for 5V-only variants like AT24C32-10SC.
Does AT24C32W-10SC-2.5 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C32W-10SC-2.5 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 desired rise time; Microchip recommends 4.7 kΩ for standard 100 kHz operation with ≤400 pF total bus capacitance.
How does the WP pin function on AT24C32W-10SC-2.5?
On AT24C32W-10SC-2.5, the WP (Write Protect) pin provides hardware-level memory protection: when tied to VCC, it inhibits write operations to the upper quadrant (8K bits) of the 32K memory space; when tied to GND or left unconnected (internally pulled down), full memory write access is enabled. This feature safeguards critical calibration or configuration data from accidental firmware overwrites.
What is the endurance rating of AT24C32W-10SC-2.5?
The AT24C32W-10SC-2.5 is rated for 1,000,000 write cycles per memory location under specified operating conditions (25°C, VCC = 2.5V–5.5V). This endurance level is verified using page-write mode and applies to all 4096 memory words. Endurance remains valid across the full industrial temperature range when operated within datasheet limits.
Is AT24C32W-10SC-2.5 qualified for automotive applications?
No, AT24C32W-10SC-2.5 is not automotive-qualified. It is specified for industrial temperature operation (−40°C to +85°C) and carries no AEC-Q100 qualification. For automotive use, Microchip offers the AT24C32W-10SI-2.5 variant (industrial grade with same electrical specs) or explicitly automotive-grade parts such as the AT24C32AN-10SU-2.5, which undergo additional stress testing and PPAP documentation.
AT24C32W-10SC-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:
- 32Kbit
- Memory Organization:
- 4K 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32W-10SC-2.5 FAQ
1.How can I place an order for AT24C32W-10SC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32W-10SC-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 AT24C32W-10SC-2.5 reliable?
The price and inventory of AT24C32W-10SC-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 AT24C32W-10SC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C32W-10SC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32W-10SC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32W-10SC-2.5?
AT24C32W-10SC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32W-10SC-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 AT24C32W-10SC-2.5?
For technical support, including AT24C32W-10SC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32W-10SC-2.5 requirements.
6.How does Aetrix verify that AT24C32W-10SC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C32W-10SC-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 AT24C32W-10SC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C32W-10SC-2.5?
All AT24C32W-10SC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32W-10SC-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 AT24C32W-10SC-2.5 part is unused and in its original packaging.
Return procedure for AT24C32W-10SC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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