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Microchip Technology AT24C32N-10SI
- Part No.:
- AT24C32N-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C32N-10SI.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,099
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Product details
Overview
AT24C32N-10SI 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, featuring hardware write protection via the WP pin, 100 kHz I²C speed at 2.7V, and industrial temperature range (–40°C to +85°C). It serves as nonvolatile configuration storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT24C32N-10SI datasheet, AT24C32N-10SI pinout, AT24C32N-10SI application, or AT24C32N-10SI equivalent, key selection criteria include voltage compatibility (2.7V–5.5V), industrial-grade temperature rating, 32-byte page write capability, hardware write protect functionality, and JEDEC SOIC-8 package dimensions.
Technical Context
The AT24C32N-10SI implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs. It uses three address pins (A0–A2) to support up to eight devices on a shared bus and features an open-drain bidirectional SDA line compatible with standard I²C pull-up configurations.
Internally, it organizes memory into 256 pages of 32 bytes each, supporting both byte and page write modes. Write cycles are self-timed (max 10 ms), and the device enters low-power standby mode after STOP condition detection or power-up, drawing only 0.5 µA typical at 2.7V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for firmware parameter tables or multi-channel sensor calibration data. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interfacing with 3.3V microcontrollers without level shifting. |
| I²C Clock Frequency | 100 kHz max at 2.7V - ensures reliable timing margin in noisy industrial environments. |
| Write Cycle Time | ≤10 ms - enables predictable firmware timeout handling during nonvolatile updates. |
| Endurance | 1 million write cycles - suitable for systems requiring frequent field calibration or logging. |
| Data Retention | 100 years - guarantees long-term integrity of stored configuration or security keys. |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor equipment. |
| Standby Current | 0.5 µA typical at 2.7V - minimizes battery drain in always-on backup power applications. |
Pinout & Package
AT24C32N-10SI is supplied in an 8-pin JEDEC SOIC package (package code 8S1), measuring 3.90 mm × 4.90 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired logic inputs enabling up to eight AT24C32N-10SI devices on one I²C bus; float to logic low by internal bias if unconnected. |
| SDA | Serial Data I/O | Bidirectional open-drain line for I²C data transfer; requires external pull-up resistor and supports wire-OR with other I²C peripherals. |
| SCL | Serial Clock Input | Positive-edge clock input for data sampling; includes Schmitt trigger and noise filtering for robust operation in electrically noisy systems. |
| WP | Write Protect Control | Hardware-enforced protection: tied to VCC disables writes to upper quadrant (8K bits); tied to GND enables full memory access. |
| GND | Ground Reference | Primary return path for supply current and signal reference for all digital inputs and outputs. |
| VCC | Power Supply | Single-supply input supporting 2.7V–5.5V operation; powers internal logic, memory array, and I/O buffers. |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte page write mode | Enables efficient bulk configuration updates with single I²C transaction, reducing bus occupancy vs. byte-by-byte writes. |
| Schmitt-trigger, filtered inputs | Rejects sub-100 ns noise spikes on SDA/SCL, eliminating spurious start/stop detection in motor-drive or switching-power environments. |
| Hardware write protection (WP pin) | Prevents accidental overwrites of critical calibration or security data without software intervention or firmware update. |
| 100-year data retention | Ensures persistent storage of factory-set parameters across product lifetime, even under thermal stress or extended shelf life. |
| Cascadable 2-wire interface | Supports multi-device topology using A0–A2 addressing, simplifying BOM consolidation in systems requiring multiple EEPROMs. |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Memory |
|---|---|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding user-defined operational parameters persistently across power cycles. Use Value: Eliminates need for external battery-backed RAM; retains settings through brownouts and maintenance shutdowns. | Use Scenario: Holding temperature-compensated offset/gain coefficients for MEMS accelerometers in predictive maintenance gateways. IC Role / Device Role / Timing Role: Factory-programmed calibration data repository accessed at boot time by host MCU before sensor initialization. Use Value: Enables plug-and-play sensor replacement with pre-loaded compensation data, reducing field service time. |
| Power Supply Unit (PSU) Trim Settings | Medical Device Usage Log |
Use Scenario: Storing digitally trimmed output voltage/current setpoints and protection thresholds in isolated AC/DC power modules. IC Role / Device Role / Timing Role: Secure, write-protected memory segment storing safety-critical trim values updated only during factory calibration. Use Value: Prevents field tampering with PSU regulation parameters while allowing authorized recalibration via WP pin control. | Use Scenario: Recording cumulative runtime, error events, and calibration history in portable diagnostic ultrasound equipment. IC Role / Device Role / Timing Role: Low-power, high-endurance data logger storing timestamped operational metadata between main processor sessions. Use Value: Supports regulatory compliance reporting with 1M-cycle endurance and 100-year retention for audit trail 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, 2.7V–5.5V, industrial temp, but in 8-pin TSSOP (8T) package; slightly smaller footprint (3.0 × 4.4 mm). | TSSOP offers higher board density; no pinout change, but thermal and soldering profile differs from SOIC. | Select when PCB space is constrained and reflow profile supports TSSOP. |
| M24C32-WMN6TP | STMicroelectronics 32K I²C EEPROM; identical 2.7V–5.5V range and 100 kHz speed at 2.7V, but rated for –40°C to +105°C and uses different WP behavior (active-high vs. AT24C32N-10SI's active-high with internal pull-down). | Wider temperature margin suits under-hood automotive use; WP logic requires verification against existing schematic. | Select for extended temperature needs beyond +85°C or dual-sourcing requirements with ST ecosystem alignment. |
Compared with AT24C32D-SSHM-T, AT24C32N-10SI offers proven SOIC-8 manufacturability and legacy design compatibility; versus M24C32-WMN6TP, it provides tighter integration with Microchip toolchains and consistent WP pin behavior for existing firmware.
Availability
AT24C32N-10SI is available at Aetrix Electronics and suitable for industrial control systems, smart sensor nodes, and medical diagnostics equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial-temperature performance.
Supply support for AT24C32N-10SI 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 embedded system integration.
The AT24C32N-10SI belongs to Microchip's legacy serial EEPROM product line, designed specifically for robust, low-power nonvolatile data storage in industrial, automotive, and medical applications where write endurance and data retention are critical.
FAQ
What is the maximum I²C clock frequency supported by AT24C32N-10SI at 2.7V?
The AT24C32N-10SI supports a maximum I²C clock frequency of 100 kHz when operating at 2.7V. This is specified in the AC Characteristics table under "2.7-, 2.5-volt" conditions and ensures timing margin compliance in electrically noisy industrial environments where higher speeds may induce communication errors.
Does AT24C32N-10SI require external pull-up resistors on SDA and SCL lines?
Yes, AT24C32N-10SI requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. The datasheet specifies typical values of 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time, and omission will prevent proper I²C communication.
How does the WP pin function on AT24C32N-10SI?
On AT24C32N-10SI, the WP pin provides hardware write protection: when tied to VCC, it inhibits writes to the upper quadrant (8K bits) of memory; when tied to GND, full memory access is enabled. If left unconnected, an internal pull-down defaults it to GND, permitting full write capability.
What is the memory organization of AT24C32N-10SI?
The AT24C32N-10SI organizes its 32,768 bits as 4096 words of 8 bits each, grouped into 256 pages of 32 bytes. This structure enables efficient 32-byte page writes and supports random addressing with a 12-bit word address, facilitating modular firmware updates and parameter storage.
Is AT24C32N-10SI pin-compatible with other AT24C32 variants like AT24C32-10PI-2.7?
Yes, AT24C32N-10SI is pin-compatible with AT24C32-10PI-2.7 and other SOIC-8 variants in the AT24C32 family, sharing identical 8-pin JEDEC SOIC (8S1) footprint, pinout, and electrical interface. Differences lie only in ordering suffixes indicating temperature grade and voltage option, not physical or functional layout.
AT24C32N-10SI 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32N-10SI FAQ
1.How can I place an order for AT24C32N-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32N-10SI 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 reliable?
The price and inventory of AT24C32N-10SI 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 is usually 5 days.
3.What payment methods are accepted for AT24C32N-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32N-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32N-10SI?
AT24C32N-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32N-10SI 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?
For technical support, including AT24C32N-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32N-10SI requirements.
6.How does Aetrix verify that AT24C32N-10SI is sourced from the original manufacturer or authorized distributors?
All AT24C32N-10SI 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 meets industry standards.
7.What is the process for return or replacement of AT24C32N-10SI?
All AT24C32N-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32N-10SI, 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 part is unused and in its original packaging.
Return procedure for AT24C32N-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C32N-10SI Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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