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Microchip Technology AT24C32W-10SC
- Part No.:
- AT24C32W-10SC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C32W-10SC.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,348
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Product details
Overview
AT24C32W-10SC from Microchip Technology (formerly Atmel) is a 32K-bit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V, with 100 kHz bus speed, hardware write protection via WP pin, and 1 million write cycles endurance. It serves as nonvolatile configuration storage in embedded microcontroller systems requiring low-voltage operation and industrial temperature tolerance.
For engineers reviewing the AT24C32W-10SC datasheet, AT24C32W-10SC pinout, AT24C32W-10SC application, or AT24C32W-10SC equivalent, key selection criteria include its 2.7–5.5V supply range, 8-pin SOIC package, 100 kHz I²C timing at low voltage, page-write capability, and hardware write-protect functionality for system-level data integrity.
Technical Context
The AT24C32W-10SC implements a standard two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs for noise immunity. Its internal address counter supports current-address, random-address, and sequential read modes, while device addressing uses A0–A2 pins to enable up to eight devices on one bus.
Write operations are internally timed (max 10 ms), support 32-byte page writes with automatic address increment within pages, and include acknowledge polling for host synchronization. The WP pin provides hardware-level protection of the upper quadrant (8K bits) when driven high, independent of software control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), enabling storage of firmware parameters or calibration data in compact embedded nodes |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V and 5V microcontrollers without level shifting |
| I²C Clock Frequency | 100 kHz at 2.7V - ensures reliable communication in low-power, noise-sensitive industrial environments |
| Write Cycle Time | Max 10 ms - defines minimum interval between write commands; impacts real-time logging latency |
| Endurance | 1 million write cycles - guarantees long-term reliability for frequently updated settings (e.g., metering counters) |
| Data Retention | 100 years at +25°C - ensures configuration persistence across product lifetime without refresh |
| Standby Current | 0.5 µA at 2.7V - minimizes battery drain in always-on IoT edge sensors |
Pinout & Package
AT24C32W-10SC is supplied in an 8-pin 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 | Device Address Input | Hardware-selectable bit for multi-device I²C bus addressing; tied high/low or left floating (internally pulled low) |
| A1 | Device Address Input | Second address bit; enables up to eight AT24C32W-10SC devices on shared SDA/SCL lines |
| A2 | Device Address Input | Third address bit; combined with A0–A1, forms 3-bit slave address (0x50–0x57) |
| GND | Ground Reference | Return path for VCC and I/O signals; must be low-impedance to ensure noise-free I²C signaling |
| VCC | Power Supply | Primary power input (2.7–5.5V); powers internal logic and memory array; bypass capacitor required |
| WP | Write Protect Control | Active-high hardware lock: when high, prevents writes to upper 8K bits (addresses 0x2000–0x3FFF) |
| SCL | Serial Clock Input | Master-generated clock; Schmitt-triggered for robust noise rejection in electrically noisy enclosures |
| SDA | Serial Data I/O | Bidirectional, open-drain line; requires external pull-up resistor; supports wire-OR with other I²C devices |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation (2.7V–5.5V) | Enables direct integration into 3.3V systems without regulators or level shifters, reducing BOM count |
| 32-Byte Page Write Mode | Reduces firmware overhead by allowing burst writes up to full page size, cutting I²C transaction count by ~32× vs byte writes |
| Schmitt Trigger Inputs | Suppresses EMI-induced glitches on SCL/SDA, eliminating spurious start/stop conditions in factory-floor environments |
| Hardware Write Protection (WP) | Prevents accidental overwrites of critical calibration or security keys during field firmware updates |
| 1 Million Write Cycles | Supports daily parameter logging for >2,700 years - exceeds typical industrial equipment service life |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables in pressure or flow sensors deployed in oil & gas pipelines. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed at power-up and during periodic self-test; retains values across brownouts. Use Value: Eliminates need for external calibration EEPROM programming stations; enables field-replaceable sensor modules with pre-loaded coefficients. | Use Scenario: Holding tariff schedules, billing registers, and tamper-event logs in electricity/water meters operating unattended for 15+ years. IC Role / Device Role / Timing Role: Secure, low-power configuration and event log storage synchronized with metrology IC via I²C during meter wake-up cycles. Use Value: WP pin locks tariff data against unauthorized modification; 100-year retention meets utility regulatory requirements for audit trail integrity. |
| Medical Device Settings Backup | PLC I/O Module Parameter Storage |
Use Scenario: Preserving user-defined alarm thresholds, display brightness, and language preferences in portable diagnostic equipment (e.g., pulse oximeters). IC Role / Device Role / Timing Role: Persistent settings store accessed at boot and updated only when user changes configuration via UI. Use Value: 0.5 µA standby current extends battery life in Class II medical devices; 2.7V operation ensures compatibility with Li-ion battery discharge curve. | Use Scenario: Saving channel-specific scaling factors, filter coefficients, and fault response modes in modular industrial I/O terminals used in automotive assembly lines. IC Role / Device Role / Timing Role: Configuration EEPROM interfaced to ARM-based controller; loaded at module initialization and reloaded after watchdog reset. Use Value: Page-write mode accelerates firmware update of 32-channel calibration data; 8-device addressing allows unified configuration across multi-slot backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M24C32-WMN6TP | STMicroelectronics 32K I²C EEPROM; same 2.7–5.5V range, 100 kHz speed, and 8-pin SOIC package; 1.8V min not supported | Identical use cases but lacks 1.8V option; suitable where 2.7V+ operation suffices and ST sourcing preferred | Select when qualifying single-source supply chains or aligning with existing ST-based designs |
| BR24G32FJ-WE2 | Rohm 32K I²C EEPROM; supports 1.7–5.5V, 1 MHz max speed, and built-in error correction (ECC); 8-pin TSSOP package | Higher-speed operation and ECC enable use in safety-critical automotive body control modules where data integrity is mandated | Choose for ASIL-B systems requiring fault-tolerant NVM or where 1 MHz I²C bandwidth improves host throughput |
Compared with M24C32-WMN6TP and BR24G32FJ-WE2, the AT24C32W-10SC offers broader legacy compatibility, proven industrial temperature stability (-40°C to +85°C), and lower standby current at 2.7V (0.5 µA), making it optimal for cost-sensitive, long-life industrial deployments where extreme speed or ECC are unnecessary.
Availability
AT24C32W-10SC is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, medical device settings backup, and PLC I/O module parameter storage requiring stable component supply across extended product lifecycles.
Supply support for AT24C32W-10SC 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 AT24C32W-10SC belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, nonvolatile data storage in industrial, automotive, and consumer electronics where I²C simplicity and long-term data integrity are essential.
FAQ
What is the operating temperature range for the AT24C32W-10SC?
The AT24C32W-10SC is rated for industrial temperature operation from -40°C to +85°C. This range is confirmed in the ordering information table, where the "-10SC" suffix denotes the commercial-grade version with 0°C to +70°C range, but the "-10SC-2.7" variant (which matches the exact part identity context) specifies industrial qualification. The AT24C32W-10SC-2.7 variant explicitly supports -40°C to +85°C, ensuring reliability in harsh environments like factory automation or outdoor metering.
Does the AT24C32W-10SC support 400 kHz I²C communication?
No, the AT24C32W-10SC does not support 400 kHz I²C communication. Per the AC Characteristics table and ordering information, this variant (with "-2.7" suffix) is specified for 100 kHz maximum clock frequency at 2.7V–5.5V. Only the standard-voltage versions (e.g., AT24C32-10SC without "-2.7") support 400 kHz at 5V. Using 400 kHz with AT24C32W-10SC may result in timing violations and unreliable data transfer.
How many devices can share the same I²C bus with the AT24C32W-10SC?
Up to eight AT24C32W-10SC devices can share a single I²C bus. This is enabled by the three hardware-configurable address pins (A0, A1, A2), each of which can be tied high, low, or left floating (internally pulled low), yielding 2³ = 8 unique 7-bit slave addresses (0x50–0x57). The AT24C32W-10SC datasheet confirms this cascadable feature under Device Addressing and Pin Configurations sections.
What is the function of the WP pin on the AT24C32W-10SC?
The WP (Write Protect) pin on the AT24C32W-10SC provides hardware-level write inhibition. When WP is tied to VCC, writes to the upper quadrant (8K bits, addresses 0x2000–0x3FFF) are blocked; when grounded, full memory access is permitted. If left unconnected, WP is internally pulled down to GND, enabling normal write operations. This feature protects critical calibration or security data from accidental overwrite during firmware updates.
Is the AT24C32W-10SC pin-compatible with other AT24C32 variants?
Yes, the AT24C32W-10SC is pin-compatible with all 8-pin SOIC-packaged AT24C32 variants (e.g., AT24C32-10SC, AT24C32N-10SC), sharing identical pinout, footprint, and electrical interface. The "W" suffix denotes wafer-level testing and enhanced reliability screening, but does not alter pin function or physical layout. This allows drop-in replacement in existing designs where higher quality assurance is required without PCB redesign.
AT24C32W-10SC 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32W-10SC FAQ
1.How can I place an order for AT24C32W-10SC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32W-10SC 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 reliable?
The price and inventory of AT24C32W-10SC 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 is usually 5 days.
3.What payment methods are accepted for AT24C32W-10SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32W-10SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32W-10SC?
AT24C32W-10SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32W-10SC 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?
For technical support, including AT24C32W-10SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32W-10SC requirements.
6.How does Aetrix verify that AT24C32W-10SC is sourced from the original manufacturer or authorized distributors?
All AT24C32W-10SC 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 meets industry standards.
7.What is the process for return or replacement of AT24C32W-10SC?
All AT24C32W-10SC units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32W-10SC, 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 part is unused and in its original packaging.
Return procedure for AT24C32W-10SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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