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Microchip Technology AT24C32N-10SI-2.5
- Part No.:
- AT24C32N-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C32N-10SI-2.5.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,689
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Product details
Overview
AT24C32N-10SI-2.5 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) I²C-compatible serial EEPROM optimized for low-voltage industrial applications. 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 in an 8-pin SOIC package rated for -40°C to +85°C.
For engineers reviewing the AT24C32N-10SI-2.5 datasheet, AT24C32N-10SI-2.5 pinout, AT24C32N-10SI-2.5 application, or AT24C32N-10SI-2.5 equivalent, key selection considerations include its 2.5V minimum supply, industrial temperature range, page-write capability, Schmitt-trigger inputs for noise immunity, and compatibility with microcontroller-based systems requiring nonvolatile parameter storage.
Technical Context
The AT24C32N-10SI-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 write protection through the WP pin. 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 write cycle (max 10 ms), supports acknowledge polling for write completion detection, and incorporates internal noise suppression circuitry including Schmitt-trigger inputs and input filtering - critical for reliable operation in electrically noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for storing configuration tables, calibration data, or firmware parameters in resource-constrained embedded systems |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V logic without level shifting in industrial control modules |
| I²C Bus Speed | 100 kHz maximum - compatible with legacy and low-speed microcontrollers while maintaining timing margin for long traces or noisy boards |
| Write Endurance | 1 million cycles - supports frequent logging or runtime parameter updates in telemetry or sensor nodes |
| Data Retention | 100 years at 25°C - ensures long-term reliability for unattended equipment like utility meters or remote monitoring devices |
| Operating Temperature | -40°C to +85°C - certified for use in industrial automation, automotive body electronics, and outdoor infrastructure |
| Standby Current | 0.5 µA max at 2.5V - minimizes power draw in battery-backed or energy-harvesting applications |
Pinout & Package
AT24C32N-10SI-2.5 is housed in an 8-pin JEDEC SOIC (8S1) package measuring 0.150" wide, with gull-wing leads and standard 1.27 mm pitch. The package is RoHS-compliant and suitable for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired address bits enabling up to eight AT24C32N-10SI-2.5 devices on a single I²C bus; floating defaults to logic low |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C devices; requires external pull-up resistor (typically 2.2–10 kΩ) |
| SCL | Serial Clock Input | Master-generated clock signal controlling data transfer timing; Schmitt-trigger input rejects noise spikes |
| WP | Write Protect Control | Hardware-enforced protection: tied high to VCC disables writes to upper quadrant (8K bits); tied low enables full memory access |
| GND | Ground Reference | System common return path for all internal circuitry and I/O signals |
| VCC | Power Supply | Primary DC supply input; must be stabilized within 2.5V–5.5V range for guaranteed operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 2.5V supply - eliminates need for voltage translators when interfacing with 2.5V/3.3V microcontrollers |
| Page Write Mode | 32-byte burst writes reduce I²C transaction overhead by >75% vs. byte-by-byte programming |
| Noise Immunity | Schmitt-trigger inputs and internal filtering suppress EMI-induced glitches on SDA/SCL lines in motor-driven or switching-power environments |
| Hardware Write Protection | WP pin provides tamper-resistant safeguard against accidental or malicious firmware corruption during field updates |
| Industrial Temperature Rating | Validated operation from -40°C to +85°C - meets extended thermal requirements for factory-floor PLCs and outdoor gateways |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation tables 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; I²C interface synchronized to MCU clock domain. Use Value: Enables field-replaceable sensor modules with persistent calibration data, eliminating manual reprogramming after module swap. | Use Scenario: Holding tariff schedules, billing history, and communication protocol settings in electricity/water meters deployed in harsh outdoor environments. IC Role / Device Role / Timing Role: Secure, low-power configuration memory updated infrequently but requiring guaranteed retention over 10+ years. Use Value: Meets ANSI C12.19 and IEC 62056 standards for metering data integrity, supported by 1M write cycles and 100-year retention. |
| Medical Device Settings Backup | Automotive Body Control Module |
Use Scenario: Preserving user-defined therapy parameters and usage logs in portable infusion pumps and diagnostic handhelds. IC Role / Device Role / Timing Role: Fail-safe storage element retaining critical operational data during battery swaps or power interruptions. Use Value: Supports FDA Class II device requirements for data persistence and traceability without volatile backup capacitors. | Use Scenario: Storing seat/mirror position presets, lighting profiles, and door lock configurations in automotive BCMs operating across vehicle battery voltage transients. IC Role / Device Role / Timing Role: Robust configuration memory tolerant of 2.5V brownouts and load-dump events; WP pin prevents corruption during ignition cycling. Use Value: Ensures consistent user experience across vehicle lifetime with no loss of personalized settings after battery disconnection. |
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 2.5–5.5V range and 100 kHz speed, but 1.8–5.5V capable; 14-pin TSSOP option available | Offers wider voltage flexibility and smaller footprint variants; lacks explicit industrial temp grade in base part number | Select if board layout allows TSSOP or future 1.8V compatibility is required |
| BR24G32FJ-3GE2 | Rohm 32K I²C EEPROM; supports 1.7–5.5V, 1 MHz bus speed, and built-in error correction (ECC); offered in 8-pin SOP | Higher speed and ECC support suit safety-critical applications; standby current higher (1 µA vs. 0.5 µA) | Choose when enhanced data integrity or faster configuration loading is prioritized over ultra-low quiescent current |
Compared with M24C32-WMN6TP and BR24G32FJ-3GE2, the AT24C32N-10SI-2.5 provides verified industrial-temperature operation out-of-the-box, lower standby current at 2.5V, and direct pin compatibility with legacy Atmel designs - making it optimal for cost-sensitive, thermally demanding industrial upgrades.
Availability
AT24C32N-10SI-2.5 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering systems, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT24C32N-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 devices, and memory solutions, with a focus on reliability and long-term product support.
The AT24C32N-10SI-2.5 belongs to Microchip's legacy serial EEPROM family designed specifically for industrial and automotive applications where robustness, low-voltage operation, and guaranteed data retention are essential.
FAQ
What is the maximum I²C clock frequency supported by the AT24C32N-10SI-2.5?
The AT24C32N-10SI-2.5 supports a maximum I²C clock frequency of 100 kHz when operating within its 2.5V to 5.5V supply range. This is specified under the 2.5V, 2.7V, and 1.8V voltage options in the AC Characteristics table. It does not support the 400 kHz mode reserved for 5.0V-only operation (e.g., AT24C32-10PC).
Does the AT24C32N-10SI-2.5 require external pull-up resistors on SDA and SCL lines?
Yes, the AT24C32N-10SI-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; 4.7 kΩ is commonly used for standard-mode I²C at 100 kHz.
How does the Write Protect (WP) pin function on the AT24C32N-10SI-2.5?
When the WP pin of the AT24C32N-10SI-2.5 is tied to VCC, write operations to the upper quadrant (8K bits) of memory are inhibited; tying WP to GND enables full memory write access. If left unconnected, an internal pull-down ensures normal write functionality - providing fail-safe default behavior.
What is the endurance rating of the AT24C32N-10SI-2.5, and how is it tested?
The AT24C32N-10SI-2.5 is rated for 1 million write cycles per memory location, verified under 5.0V, 25°C conditions using page-write mode. This endurance applies to the entire memory array and is characterized per JEDEC standards, ensuring reliable operation in applications requiring frequent parameter updates.
Is the AT24C32N-10SI-2.5 compatible with other devices in the AT24Cxx family?
Yes, the AT24C32N-10SI-2.5 shares identical I²C protocol, pinout, and command structure with other AT24C32 variants (e.g., AT24C32-10PI-2.5) and maintains backward compatibility with AT24C16 in terms of device addressing (A0–A2 pins). However, it is not pin- or software-compatible with AT24C64 due to differences in memory size and page boundaries.
AT24C32N-10SI-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32N-10SI-2.5 FAQ
1.How can I place an order for AT24C32N-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32N-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 AT24C32N-10SI-2.5 reliable?
The price and inventory of AT24C32N-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 AT24C32N-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT24C32N-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32N-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32N-10SI-2.5?
AT24C32N-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32N-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 AT24C32N-10SI-2.5?
For technical support, including AT24C32N-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32N-10SI-2.5 requirements.
6.How does Aetrix verify that AT24C32N-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT24C32N-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 AT24C32N-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT24C32N-10SI-2.5?
All AT24C32N-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32N-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 AT24C32N-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT24C32N-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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