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Microchip Technology AT24C32N-10SC
- Part No.:
- AT24C32N-10SC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT24C32N-10SC.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,163
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Product details
Overview
AT24C32N-10SC from Microchip Technology (formerly Atmel) is a 32 Kbit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V, featuring hardware write protection via WP pin, 32-byte page write capability, and 10 ms max self-timed write cycle - deployed in industrial control panels for nonvolatile parameter storage.
For engineers reviewing the AT24C32N-10SC datasheet, AT24C32N-10SC pinout, AT24C32N-10SC application, or AT24C32N-10SC equivalent, key selection criteria include VCC range compatibility (2.7–5.5V), 100 kHz I²C speed at low voltage, WP-driven quadrant-level write protection, and JEDEC SOIC-8 packaging with industry-standard pinout.
Technical Context
The AT24C32N-10SC implements a two-wire (I²C) serial interface with open-drain SDA and edge-triggered SCL, supporting up to eight devices on one bus via A0–A2 address inputs. It uses Schmitt-trigger inputs and internal noise filtering to ensure robust operation in electrically noisy environments.
Memory is partitioned into 256 pages of 32 bytes each; page writes auto-increment lower 5 address bits while retaining upper bits, enabling efficient burst writes within a single page boundary. Write protection applies exclusively to the upper quadrant (8 Kbits) when WP = VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8), sufficient for storing configuration tables, calibration data, or firmware metadata in resource-constrained systems |
| Supply Voltage Range | 2.7V to 5.5V - supports mixed-voltage designs without level-shifting for I²C peripherals |
| I²C Clock Frequency | 100 kHz max at 2.7V - ensures timing compliance in low-power embedded applications with reduced VCC |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands; enables predictable firmware update latency |
| Endurance | 1 million write cycles - guarantees long-term reliability for frequently updated settings such as energy meter logs or sensor calibration offsets |
| Data Retention | 100 years at +25°C - ensures persistent storage integrity across product lifetime without refresh |
| Standby Current | 0.5 µA max at 2.7V - minimizes battery drain in always-on IoT nodes or backup power circuits |
Pinout & Package
AT24C32N-10SC is housed in an 8-pin JEDEC SOIC package (8S1), 0.150" wide, with gull-wing leads and standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired logic inputs selecting one of eight possible I²C addresses (0x50–0x57); floating defaults to '0' for backward compatibility |
| SDA | Serial Data I/O | Open-drain bidirectional line shared across multiple I²C devices; requires external pull-up resistor (typically 4.7 kΩ) |
| SCL | Serial Clock Input | Positive-edge clock input controlling data sampling; driven by master only; tolerates 100 ns noise spikes due to internal filtering |
| WP | Write Protect Control | Hardware-enforced lock: tied to VCC disables writes to upper 8 Kbits; tied to GND enables full memory access |
| GND | Ground Reference | Primary return path for VCC and signal currents; must be low-impedance to maintain I²C signal integrity |
| VCC | Power Supply | Single supply input supporting 2.7–5.5V; internal regulation enables stable EEPROM operation across voltage variations |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Valid down to 2.7V supply - eliminates need for external voltage regulators in 3.3V or dual-rail systems |
| Page Write Mode | 32-byte burst writes reduce I²C transaction overhead by >75% vs. byte-by-byte programming |
| Schmitt Trigger Inputs | Input hysteresis on SDA/SCL rejects sub-100 ns noise transients common in motor-drive or switching-power environments |
| Hardware Write Protection | WP pin provides deterministic, glitch-immune memory lockdown - critical for safety-critical boot configuration storage |
| Cascadable Architecture | Three address pins support up to eight AT24C32N-10SC devices on one I²C bus - simplifies multi-sensor node design |
Applications
| Industrial PLC Configuration Storage | Smart Meter Calibration Data Retention |
|---|---|
Use Scenario: Storing user-defined I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers during power loss. IC Role / Device Role / Timing Role: Nonvolatile parameter register holding persistent system state; accessed via I²C during boot or runtime reconfiguration. Use Value: Enables zero-configuration recovery after brownout; 100-year retention prevents field recalibration every 5–10 years. |
Use Scenario: Archiving metrology calibration coefficients and tamper-event timestamps in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, WP-protected memory segment storing cryptographically signed calibration data accessible only during authorized service mode. Use Value: WP pin blocks unauthorized writes to calibration zone; 1M endurance supports daily log updates over 27+ years. |
| Medical Device Usage Logs | Automotive Body Control Module Settings |
Use Scenario: Recording cumulative operational hours, error codes, and maintenance intervals in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to ARM Cortex-M0+ MCU; written only on shutdown or error event. Use Value: 0.5 µA standby current extends battery life beyond 5 years in battery-backed units; 2.7V min VCC ensures operation during Li-ion discharge. |
Use Scenario: Saving seat position presets, mirror angles, and lighting profiles in automotive BCMs across ignition cycles. IC Role / Device Role / Timing Role: I²C slave device sharing bus with CAN gateway MCU; writes occur during vehicle sleep-mode wake-up sequence. Use Value: 100 kHz I²C speed at 2.7V matches BCM's low-voltage sleep rail; 8-device addressing supports modular door module expansion. |
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 32 Kbit capacity, 2.5–5.5V range, TSSOP-8 package; higher 400 kHz I²C speed only above 2.5V | Preferred where board space is constrained and 400 kHz operation required; not drop-in due to different footprint | Select if layout allows TSSOP-8 and system operates ≥2.5V with need for faster writes |
| M24C32-WMN6TP | STMicroelectronics 32 Kbit EEPROM; identical 2.7–5.5V range, SOIC-8, and 100 kHz speed; WP pin functionally identical | Pin-to-pin compatible with same JEDEC SOIC-8 footprint and I²C protocol; qualified per AEC-Q100 Grade 2 for extended temp | Drop-in alternative for automotive-grade designs requiring temperature validation beyond commercial spec |
Compared with AT24C32N-10SC, AT24C32D-SSHM-T offers higher-speed operation but requires PCB redesign, while M24C32-WMN6TP delivers identical form/fit/function with added automotive qualification - making it the preferred substitute where extended temperature or AEC-Q100 compliance is mandatory.
Availability
AT24C32N-10SC is available at Aetrix Electronics and suitable for industrial control panels, smart utility meters, and medical diagnostics equipment requiring stable component supply across multi-year production cycles.
Supply support for AT24C32N-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24C series EEPROMs, delivering high-reliability nonvolatile memory solutions since 1998.
The AT24C32N-10SC belongs to Microchip's legacy serial EEPROM product line, engineered specifically for cost-sensitive, low-power embedded systems needing guaranteed 100-year data retention and robust I²C interoperability.
FAQ
What is the maximum I²C clock frequency supported by AT24C32N-10SC?
The AT24C32N-10SC supports up to 100 kHz I²C clock frequency when operating within its 2.7V to 5.5V supply range. This limit is specified under the -2.7 option variant and ensures reliable timing margins for noise-immune communication in industrial environments. Higher speeds (e.g., 400 kHz) require the 5.0V variant (e.g., AT24C32-10SC) and are not guaranteed for AT24C32N-10SC.
Does AT24C32N-10SC support partial page writes?
Yes, AT24C32N-10SC supports partial page writes: up to 32 bytes can be written in a single transaction, and the device accepts fewer than 32 bytes without padding. The internal address counter increments automatically after each byte, wrapping within the current 32-byte page boundary - enabling efficient updates of non-contiguous configuration fields without erasing adjacent data.
How does the WP pin function on AT24C32N-10SC?
On AT24C32N-10SC, the WP (Write Protect) pin provides hardware-level memory protection: when tied to VCC, writes to the upper quadrant (8 Kbits) are disabled while lower 24 Kbits remain writable; when grounded, full memory access is enabled. If left unconnected, an internal pull-down activates full write capability - a fail-safe behavior confirmed in the device's pin description section.
What is the endurance rating of AT24C32N-10SC?
The AT24C32N-10SC is rated for 1 million write cycles per memory location under specified conditions (5.0V, 25°C, page mode). This endurance is validated per JEDEC standards and applies uniformly across all 4096 words. Real-world wear leveling is unnecessary due to the device's architecture, making it suitable for daily logging in utility meters or firmware update staging buffers.
Is AT24C32N-10SC pin-compatible with other AT24C32 variants?
Yes, AT24C32N-10SC shares identical pinout and electrical interface with all AT24C32 family members in the 8-pin SOIC (8S1) package, including AT24C32-10SC and AT24C32W-10SC. Differences lie solely in screening grade (commercial vs. industrial), voltage option (-2.7 vs. blank), and marking - all retain the same A0–A2/SDA/SCL/WP/GND/VCC arrangement and mechanical dimensions.
AT24C32N-10SC 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32N-10SC FAQ
1.How can I place an order for AT24C32N-10SC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32N-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 AT24C32N-10SC reliable?
The price and inventory of AT24C32N-10SC 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 is usually 5 days.
3.What payment methods are accepted for AT24C32N-10SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32N-10SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32N-10SC?
AT24C32N-10SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32N-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 AT24C32N-10SC?
For technical support, including AT24C32N-10SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32N-10SC requirements.
6.How does Aetrix verify that AT24C32N-10SC is sourced from the original manufacturer or authorized distributors?
All AT24C32N-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 AT24C32N-10SC meets industry standards.
7.What is the process for return or replacement of AT24C32N-10SC?
All AT24C32N-10SC units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32N-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 AT24C32N-10SC part is unused and in its original packaging.
Return procedure for AT24C32N-10SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C32N-10SC Tags
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M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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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
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AT24C08C-STUM-T
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