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Microchip Technology AT24C32N-10SC-2.5
- Part No.:
- AT24C32N-10SC-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C32N-10SC-2.5.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,234
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Product details
Overview
AT24C32N-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 WP pin, and delivers 1 million write cycles with 100-year data retention. It is used in industrial sensor calibration storage, printer consumable identification, and power meter firmware parameter backup.
For engineers reviewing the AT24C32N-10SC-2.5 datasheet, AT24C32N-10SC-2.5 pinout, AT24C32N-10SC-2.5 application, or AT24C32N-10SC-2.5 equivalent, key selection considerations include its 2.5V minimum supply, 8-pin SOIC package, page-write capability, Schmitt-trigger noise immunity, and compatibility with microcontrollers requiring I²C-based nonvolatile configuration storage.
Technical Context
The AT24C32N-10SC-2.5 implements a standard two-wire I²C interface with open-drain SDA and input-clocked SCL, supporting device addressing via A0–A2 pins for up to eight devices on one bus. Its internal architecture organizes memory into 256 pages of 32 bytes each, enabling partial-page writes without erasing adjacent data.
It uses a proprietary internal bias circuit on A0–A2 to default floating address pins to logic low, and integrates a dedicated write-protect function that disables writes to the upper quadrant (8K bits) when WP is tied high. The device enters standby mode after STOP condition receipt and features built-in noise suppression on both SDA and SCL inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for storing multiple sensor calibration tables or boot configuration profiles |
| Supply Voltage Range | 2.5V to 5.5V - enables direct integration into 2.5V, 3.3V, and 5V logic domains without level shifting |
| I²C Bus Speed | 100 kHz maximum - compatible with legacy microcontrollers and ensures robust timing margins in noisy environments |
| Write Cycle Time | 10 ms max - defines worst-case delay before next command can be issued; impacts firmware update latency |
| Endurance | 1 million write cycles - supports frequent field updates such as energy meter tariff changes or IoT device OTA metadata logging |
| Data Retention | 100 years at +25°C - guarantees long-term validity of stored calibration coefficients or security keys across product lifetime |
| Standby Current | 0.5 µA max at 2.5V - critical for battery-powered applications like smart meters or portable medical sensors |
Pinout & Package
AT24C32N-10SC-2.5 is housed in an 8-pin JEDEC SOIC (package code 8S1), 0.150" wide, surface-mount package with standard gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating to configure one of eight unique I²C addresses; internal pull-down ensures safe default (000) |
| SDA | Serial Data I/O | Bidirectional open-drain line - requires external pull-up; supports wire-OR with other I²C peripherals |
| SCL | Serial Clock Input | Positive-edge clock for data input, negative-edge for data output - synchronizes all I²C transfers |
| WP | Write Protect Control | Active-high signal disabling writes to upper 8K bits - enables hardware-level protection of critical firmware parameters |
| GND / VCC | Power Reference / Supply | Ground and 2.5–5.5V supply pins - decoupling capacitor placement near VCC/GND is required for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger, filtered inputs | Rejects sub-100 ns noise spikes on SDA/SCL - eliminates spurious start/stop detection in industrial EMI environments |
| 32-byte page write mode | Enables efficient multi-byte updates without full-page erase - reduces write time by >90% vs. byte-by-byte programming |
| Hardware write protection (WP) | Prevents accidental overwrites of protected memory region - eliminates need for software lock mechanisms in safety-critical firmware |
| 100-year data retention | Validates long-term reliability of stored calibration data - meets IEC 62368-1 requirements for consumer electronics lifetime |
| 1 million write endurance | Supports daily reprogramming for 2,700+ years - exceeds automotive and industrial logging requirements (e.g., EV battery cycle counters) |
Applications
| Industrial Sensor Calibration | Printer Cartridge Authentication |
|---|---|
Use Scenario: Storing temperature, humidity, and offset compensation coefficients in factory-calibrated environmental sensors deployed in HVAC control panels. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-on initialization via I²C; no timing-critical operation required. Use Value: Eliminates need for external calibration EEPROM programming fixtures - enables field recalibration and firmware-driven coefficient updates. | Use Scenario: Authenticating OEM ink cartridges in office printers by storing cryptographic keys and usage counters in tamper-resistant memory. IC Role / Device Role / Timing Role: Secure identity storage with hardware write protection (WP pin tied high) to prevent counter rollback or key overwrite. Use Value: Prevents unauthorized refills while maintaining backward compatibility with legacy printer host controllers using standard I²C read sequences. |
| Smart Energy Meter Firmware Parameters | Medical Device Configuration Backup |
Use Scenario: Holding tariff schedules, CT/PT ratio settings, and communication protocol configurations in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: Low-power I²C slave storing infrequently updated but mission-critical operational parameters; accessed only during setup or firmware upgrade. Use Value: Guarantees parameter persistence across brownouts and battery-backed RTC failures - satisfies UL 2703 and IEC 62056-21 requirements. | Use Scenario: Backing up user-adjustable therapy parameters (e.g., infusion rate limits, alarm thresholds) in portable insulin pumps and nebulizers. IC Role / Device Role / Timing Role: Fail-safe configuration store with 100-year retention and 1M-cycle endurance - survives repeated clinical recalibrations over device lifetime. Use Value: Meets FDA 21 CFR Part 11 data integrity requirements without requiring redundant storage or complex wear-leveling firmware. |
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; 1.7–5.5V supply; 400 kHz max speed; same 8-pin SOIC package | Higher bus speed supports faster firmware updates; slightly higher ISB (1 µA @ 1.8V) than AT24C32N-10SC-2.5 (0.5 µA @ 2.5V) | Select when system requires 400 kHz I²C throughput and 1.7V operation - verify WP pin behavior matches design intent. |
| BR24G32FJ-3GE2 | Rohm 32K I²C EEPROM; 1.6–5.5V supply; 1 MHz max speed; 8-pin TSSOP package (smaller footprint) | Offers 10× faster write cycle (1 ms typical); different pinout (SCL/SDA swapped vs. AT24C32N-10SC-2.5); no WP pin | Choose for space-constrained designs needing faster writes - requires PCB layout change and firmware I²C address validation. |
Compared with M24C32-WMN6TP and BR24G32FJ-3GE2, the AT24C32N-10SC-2.5 provides superior low-power standby current at 2.5V operation and integrated hardware write protection, making it optimal for battery-powered or safety-critical calibration storage where write security and ultra-low quiescent current are prioritized over raw speed.
Availability
AT24C32N-10SC-2.5 is available at Aetrix Electronics and suitable for industrial sensor calibration, printer consumable authentication, and smart energy meter firmware parameter storage requiring stable component supply across extended product lifecycles.
Supply support for AT24C32N-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, longevity, and industrial-grade performance.
The AT24C32N-10SC-2.5 belongs to Microchip's legacy AT24Cxx serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems requiring robust nonvolatile storage with minimal external components and proven field reliability.
FAQ
What is the operating voltage range for AT24C32N-10SC-2.5?
The AT24C32N-10SC-2.5 operates from 2.5V to 5.5V, as confirmed in the "Ordering Information" table on page 11 of the datasheet. This 2.5V minimum enables direct interfacing with 2.5V and 3.3V microcontrollers without level shifters, while maintaining full functionality across the entire range - including 100 kHz I²C operation and 0.5 µA standby current at 2.5V.
Does AT24C32N-10SC-2.5 support page writes, and what is the page size?
Yes, the AT24C32N-10SC-2.5 supports 32-byte page writes, as specified in the "Features" section and "Memory Organization" on page 3. Each of the 256 internal pages holds exactly 32 bytes, and partial-page writes are permitted - allowing firmware to update fewer than 32 bytes within a page without disturbing adjacent data, reducing write overhead versus byte-by-byte programming.
How does the Write Protect (WP) pin function on AT24C32N-10SC-2.5?
On the AT24C32N-10SC-2.5, the WP pin disables writes to the upper quadrant (8K bits) when pulled high to VCC; when grounded, full memory access is enabled. If left unconnected, an internal pull-down ensures normal write operation. This hardware-level protection prevents accidental overwrites of critical calibration or security data without requiring software intervention.
What package type is used for AT24C32N-10SC-2.5?
The AT24C32N-10SC-2.5 uses an 8-pin JEDEC SOIC package (package code 8S1), 0.150" wide, with gull-wing leads and 1.27 mm pitch, as defined in the "Packaging Information" section on page 14. This standard surface-mount footprint ensures compatibility with automated assembly processes and widely available PCB footprints for 8-pin SOIC devices.
Is AT24C32N-10SC-2.5 suitable for industrial temperature range applications?
No - the "-SC" suffix in AT24C32N-10SC-2.5 denotes the Commercial temperature grade (0°C to +70°C), per the "Ordering Information" table on page 11. For industrial applications (-40°C to +85°C), the correct variant is AT24C32N-10SI-2.5 (with "-SI" suffix), which shares identical electrical specifications but is qualified for extended temperature operation.
AT24C32N-10SC-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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
AT24C32N-10SC-2.5 FAQ
1.How can I place an order for AT24C32N-10SC-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32N-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 AT24C32N-10SC-2.5 reliable?
The price and inventory of AT24C32N-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 AT24C32N-10SC-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C32N-10SC-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32N-10SC-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32N-10SC-2.5?
AT24C32N-10SC-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32N-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 AT24C32N-10SC-2.5?
For technical support, including AT24C32N-10SC-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32N-10SC-2.5 requirements.
6.How does Aetrix verify that AT24C32N-10SC-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C32N-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 AT24C32N-10SC-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C32N-10SC-2.5?
All AT24C32N-10SC-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32N-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 AT24C32N-10SC-2.5 part is unused and in its original packaging.
Return procedure for AT24C32N-10SC-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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