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Microchip Technology AT24C32W-10SI-1.8
- Part No.:
- AT24C32W-10SI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C32W-10SI-1.8.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,145
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Product details
Overview
AT24C32W-10SI-1.8 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 1.8V to 5.5V, supports 100 kHz clock rate at 1.8V, features hardware write protection via WP pin, and delivers 1 million write cycles with 100-year data retention - used in industrial sensor calibration storage and firmware parameter backup.
For engineers reviewing the AT24C32W-10SI-1.8 datasheet, AT24C32W-10SI-1.8 pinout, AT24C32W-10SI-1.8 application, or AT24C32W-10SI-1.8 equivalent, key selection considerations include 1.8V minimum supply compatibility, 8-pin SOIC (8S1) package footprint, page-write capability (32-byte), Schmitt-trigger noise immunity on SDA/SCL, and hardware-based upper-quadrant memory write protection.
Technical Context
The AT24C32W-10SI-1.8 implements a standard two-wire I²C interface with bidirectional open-drain SDA and edge-triggered SCL, supporting cascaded bus configurations up to eight devices using A0–A2 address inputs. Its internal architecture organizes memory as 256 pages of 32 bytes each, enabling partial-page writes without erasing adjacent data.
It integrates a low-power standby mode (ISB = 0.1 µA at 1.8V), Schmitt-trigger filtering on SDA/SCL for robust noise suppression, and an internal voltage detector that resets the device during brown-out conditions to prevent data corruption - critical for battery-powered and automotive-grade applications.
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 systems |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and mixed-voltage systems without level shifters |
| I²C Clock Rate | 100 kHz at 1.8V - ensures reliable timing margin under low-voltage operation while maintaining compatibility with legacy controllers |
| Write Cycle Time | Max 10 ms - defines minimum interval between write commands; impacts firmware update latency and real-time logging responsiveness |
| Endurance | 1 million write cycles - supports frequent parameter updates in field-deployed equipment such as smart meters or industrial PLCs |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored calibration data across product lifecycle without refresh |
| Standby Current | 0.1 µA at 1.8V - minimizes quiescent power draw in always-on battery-backed applications like IoT node sleep states |
Pinout & Package
AT24C32W-10SI-1.8 uses an 8-lead JEDEC SOIC (8S1) package, 0.150" wide body, surface-mount compatible with standard reflow profiles and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or floating to configure one of eight unique I²C addresses; floating defaults to logic low for backward compatibility with AT24C16 |
| SDA | Serial Data I/O | Bidirectional open-drain line requiring external pull-up; supports wire-OR with other I²C peripherals on shared bus |
| SCL | Serial Clock Input | Positive-edge sampled clock input; timing-critical path determining maximum bus speed and noise immunity |
| WP | Hardware Write Protect | Active-high signal disabling writes to upper quadrant (8K bits); prevents accidental overwrites of critical firmware parameters |
| VCC | Power Supply | 1.8V–5.5V tolerant input; internal regulation ensures stable core voltage across full operating range |
| GND | Ground Reference | Common return path for all digital and internal memory operations; must be low-impedance for noise-free read/write stability |
Key Features
| Feature | Design Value |
|---|---|
| 1.8V Operation Support | Enables integration into ultra-low-power systems powered by coin cells or energy-harvesting sources without voltage boosting |
| 32-Byte Page Write Mode | Reduces write overhead by allowing burst programming of calibration data blocks instead of single-byte writes |
| Schmitt Trigger Inputs | Rejects sub-microsecond noise spikes on SDA/SCL lines, eliminating false start/stop detection in electrically noisy environments |
| Hardware Write Protection | Physically isolates upper memory quadrant from accidental modification - essential for preserving factory-trimmed constants |
| Cascadable I²C Bus | Supports up to eight AT24C32W-10SI-1.8 devices on one bus using A0–A2 addressing, simplifying multi-sensor BOM consolidation |
Applications
| Industrial Sensor Calibration | Smart Meter Firmware Storage |
|---|---|
Use Scenario: Storing temperature, offset, and gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed during system boot and runtime recalibration sequences via I²C. Use Value: Enables field-updatable calibration without firmware reflashing; 100-year retention ensures accuracy across 15+ year deployments. | Use Scenario: Holding tariff tables, billing counters, and communication protocol stacks in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, low-power memory for mission-critical operational data synchronized with metrology ICs over I²C. Use Value: WP pin prevents tampering with billing registers; 1.8V operation allows direct connection to meter SoC's low-voltage domain. |
| Medical Device Configuration | Automotive Body Control Module |
Use Scenario: Saving user preferences, alarm thresholds, and diagnostic history logs in portable patient monitors. IC Role / Device Role / Timing Role: Persistent storage element interfaced to ARM Cortex-M microcontroller during initialization and event logging. Use Value: 1 million endurance supports daily clinical recalibrations; 0.1 µA standby current extends battery life in Class II medical devices. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in vehicle door modules. IC Role / Device Role / Timing Role: I²C-connected EEPROM providing fast, deterministic access to user-configurable settings during ignition-on sequence. Use Value: Industrial temperature range (-40°C to +85°C) ensures reliability in under-hood thermal cycling; 8S1 package fits compact PCB layouts. |
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; 1.7V–5.5V supply; 400 kHz max clock at 5V; same 8-pin SOIC (SO8) package | Higher max clock rate but lacks 100 kHz guarantee at 1.8V; no explicit Schmitt trigger spec in datasheet | Preferred when system operates above 2.5V and requires faster writes; verify noise immunity in target environment |
| BR24G32FJ-3GE2 | Rohm 32K I²C EEPROM; 1.6V–5.5V supply; 1 MHz clock at 5V; 8-pin TSSOP (same pinout as SOIC) | Lower VIL/VIH thresholds improve noise margin; includes built-in write-cycle interrupt flag | Best for new designs needing enhanced noise resilience and status feedback; requires layout review for TSSOP thermal relief |
Compared with AT24C32W-10SI-1.8, M24C32-WMN6TP offers higher speed above 2.5V but less guaranteed low-voltage timing margin, while BR24G32FJ-3GE2 provides superior noise immunity and active write-status signaling - both require validation of WP functionality and page-write behavior against existing firmware.
Availability
AT24C32W-10SI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter firmware storage, and automotive body control module applications requiring stable component supply, long-term obsolescence management, and consistent lot-to-lot parametric performance.
Supply support for AT24C32W-10SI-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 nonvolatile memory solutions, with a focus on reliability and long-term product support.
The AT24C32W-10SI-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring robust I²C-compatible nonvolatile storage in space-constrained industrial and automotive applications.
FAQ
What is the minimum operating voltage for AT24C32W-10SI-1.8?
The AT24C32W-10SI-1.8 supports true 1.8V operation, with guaranteed functionality across the full 1.8V to 5.5V supply range. At 1.8V, it maintains 100 kHz I²C clock rate, 0.1 µA standby current, and full read/write capability - verified per Microchip's DC and AC characteristics tables for the -1.8 option.
Does AT24C32W-10SI-1.8 support page writes, and what is the page size?
Yes, AT24C32W-10SI-1.8 supports 32-byte page writes, allowing up to 32 sequential bytes to be written in a single I²C transaction. This reduces bus overhead versus byte-by-byte writes and is confirmed in the "Write Operations" section of the datasheet, where page boundaries and rollover behavior are explicitly defined.
How does the WP pin function on AT24C32W-10SI-1.8?
On AT24C32W-10SI-1.8, the WP pin disables writes to the upper quadrant (8K bits) when pulled high to VCC; when tied to GND or left unconnected (internally pulled down), full memory access is enabled. This hardware-level protection is independent of software commands and applies only to the top 25% of the 32K address space.
What package type is used by AT24C32W-10SI-1.8?
AT24C32W-10SI-1.8 uses an 8-lead JEDEC SOIC package (designated 8S1), 0.150" wide body, with gull-wing leads compliant with MS-012 standards. This matches the footprint of common microcontroller I²C peripherals and supports automated assembly using standard reflow profiles.
Is AT24C32W-10SI-1.8 rated for industrial temperature range?
Yes, AT24C32W-10SI-1.8 is specified for the industrial temperature range of -40°C to +85°C, as confirmed in the Ordering Information table and Absolute Maximum Ratings section. This rating applies to all electrical and timing parameters under the -1.8 voltage option and is validated across production lots.
AT24C32W-10SI-1.8 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32W-10SI-1.8 FAQ
1.How can I place an order for AT24C32W-10SI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32W-10SI-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 AT24C32W-10SI-1.8 reliable?
The price and inventory of AT24C32W-10SI-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 AT24C32W-10SI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C32W-10SI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32W-10SI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32W-10SI-1.8?
AT24C32W-10SI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32W-10SI-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 AT24C32W-10SI-1.8?
For technical support, including AT24C32W-10SI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32W-10SI-1.8 requirements.
6.How does Aetrix verify that AT24C32W-10SI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C32W-10SI-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 AT24C32W-10SI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C32W-10SI-1.8?
All AT24C32W-10SI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32W-10SI-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 AT24C32W-10SI-1.8 part is unused and in its original packaging.
Return procedure for AT24C32W-10SI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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