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Microchip Technology AT24C32W-10SC-2.7
- Part No.:
- AT24C32W-10SC-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C32W-10SC-2.7.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,244
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Product details
Overview
AT24C32W-10SC-2.7 from Microchip Technology (formerly Atmel) is a 32K-bit (4096 × 8) I²C-compatible serial EEPROM optimized for low-voltage embedded systems. It operates from 2.7V 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 and power meter firmware parameter backup.
For engineers reviewing the AT24C32W-10SC-2.7 datasheet, AT24C32W-10SC-2.7 pinout, AT24C32W-10SC-2.7 application, or AT24C32W-10SC-2.7 equivalent, key selection considerations include its 2.7V–5.5V supply range, 8-pin SOIC package, page-write capability, Schmitt-trigger inputs for noise immunity, and hardware write-protect functionality.
Technical Context
The AT24C32W-10SC-2.7 implements a standard two-wire I²C interface with open-drain SDA/SCL pins, supporting bidirectional data transfer and device addressing via A0–A2 pins. 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), includes an internal pull-down on unconnected address pins, and provides hardware-level write protection for the upper quadrant (8K bits) when WP is tied high. Noise suppression is achieved via Schmitt-trigger inputs and input filtering with 100 ns noise immunity at 1.8V/2.7V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for storing configuration tables, calibration coefficients, or boot parameters in resource-constrained microcontrollers. |
| Supply Voltage Range | 2.7V to 5.5V - enables direct interfacing with 3.3V logic systems and backward compatibility with 5V legacy designs without level shifting. |
| I²C Bus Speed | 100 kHz maximum - ensures reliable communication in electrically noisy industrial environments while maintaining timing margin per I²C specification. |
| Write Cycle Time | 10 ms max - defines minimum interval between successive write commands; requires polling or timeout handling in firmware before initiating next write. |
| Endurance & Retention | 1 million write cycles / 100 years data retention - supports long-life field deployment in utility meters and automotive ECUs where infrequent but critical updates occur. |
| Standby Current | 0.5 µA max at 2.7V - minimizes quiescent power draw in battery-backed or energy-harvesting applications such as smart sensors. |
| ESD Protection | >3000 V HBM - provides robust handling during board assembly and field service without requiring additional external protection circuitry. |
Pinout & Package
AT24C32W-10SC-2.7 is housed in an 8-pin JEDEC SOIC (package code 8S1), measuring 3.9 mm × 4.9 mm × 1.75 mm, with gull-wing leads and 1.27 mm pitch. This surface-mount package supports automated PCB assembly and offers thermal performance suitable for industrial temperature range (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating to configure one of eight possible I²C slave addresses (0x50–0x57); internal pull-down allows default zero when unconnected. |
| SDA | Serial Data I/O | Open-drain bidirectional line shared across multiple I²C devices; requires external pull-up resistor (typically 2.2–10 kΩ) to VCC. |
| SCL | Serial Clock Input | Master-generated clock signal; rising edge latches data into device, falling edge outputs data - timing must comply with tLOW/tHIGH min/max specs. |
| WP | Write Protect Control | Active-high pin: tied to VCC to lock upper 8K bits (addresses 0x2000–0x3FFF); grounded for full read/write access. |
| VCC | Power Supply | Primary supply input (2.7–5.5V); decoupling capacitor (0.1 µF ceramic) required within 1 cm of pin for stable operation. |
| GND | Ground Reference | System ground return path; must be connected to same reference plane as microcontroller and other I²C peripherals. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation | Functional down to 2.7V supply - eliminates need for voltage regulators in 3.3V systems and simplifies power architecture in mixed-voltage boards. |
| Page Write Mode | 32-byte burst writes reduce I²C transaction overhead by up to 97% vs. byte-by-byte writes - accelerates firmware update or logging operations. |
| Schmitt-Trigger Inputs | Input hysteresis on SDA/SCL rejects noise spikes ≤100 ns - improves reliability in motor-drive or switching-power-supply adjacent layouts. |
| Hardware Write Protection | WP pin disables writes to top memory quadrant without software intervention - prevents accidental corruption of critical calibration or security keys. |
| Cascadable Architecture | Supports up to 8 devices on single I²C bus using A0–A2 address bits - enables scalable memory expansion without additional GPIO or buses. |
Applications
| Industrial Sensor Calibration | Smart Energy Metering |
|---|---|
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: Nonvolatile parameter storage with guaranteed integrity across power cycles and field reprogramming events. Use Value: Eliminates need for external calibration trimmers or host MCU flash wear leveling; 1M endurance supports decades of recalibration cycles. |
Use Scenario: Holding tariff schedules, billing registers, and tamper-event logs in DIN-rail mounted electricity meters operating continuously for 15+ years. IC Role / Device Role: Secure, low-power configuration and event history storage compliant with IEC 62056 and ANSI C12 standards. Use Value: Hardware WP pin protects revenue-critical tariff data from firmware bugs or malicious overwrite attempts during field upgrades. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Saving user preferences (mirror position, seat settings) and fault-code history in 12V automotive BCMs exposed to load-dump transients. IC Role / Device Role: Automotive-grade EEPROM with extended temperature support (-40°C to +85°C) and >3000V HBM ESD rating. Use Value: Meets AEC-Q100 stress test requirements without derating; 100-year retention ensures data survival over vehicle lifetime. |
Use Scenario: Archiving calibration constants and usage counters for FDA-regulated portable ultrasound probes requiring traceable maintenance records. IC Role / Device Role: Reliable, audit-ready nonvolatile storage with deterministic write timing (10 ms max) for regulatory compliance logging. Use Value: Self-timed writes prevent bus lockup during critical diagnostics; page-write mode reduces logging latency below 50 ms thresholds. |
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 | 32K-bit I²C EEPROM, 1.7–5.5V supply, 400 kHz max speed, SO8 package; lower standby current (100 nA typical at 1.8V). | Higher-speed option for 3.3V systems needing faster configuration loads; lacks dedicated WP pin - write protection relies on software locking. | Select when maximizing bus throughput or minimizing sleep-mode power is critical, and hardware write protection is not required. |
| BR24G32FJ-WE2 | 32K-bit I²C EEPROM, 1.6–5.5V supply, 1 MHz max speed, TSSOP8 package; built-in error correction (ECC) and enhanced data retention (200 years). | Targeted at high-reliability medical/aerospace use; ECC mitigates soft errors in radiation-prone environments. | Choose for mission-critical applications where data integrity under long-term storage or ionizing radiation exposure is mandatory. |
Compared with M24C32-WMN6TP and BR24G32FJ-WE2, AT24C32W-10SC-2.7 provides balanced performance for industrial control: its hardware WP pin delivers deterministic protection, its 100 kHz speed ensures noise resilience, and its proven 1M/100y spec meets long-lifecycle OEM requirements without ECC complexity or premium cost.
Availability
AT24C32W-10SC-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart energy metering, and automotive body control modules requiring stable component supply across multi-year production programs.
Supply support for AT24C32W-10SC-2.7 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 product continuity, quality assurance, and long-term supply commitment for the AT24C series EEPROMs.
The AT24C32W-10SC-2.7 belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in space-constrained embedded systems operating across industrial and automotive temperature ranges.
FAQ
What is the maximum I²C clock frequency supported by AT24C32W-10SC-2.7?
The AT24C32W-10SC-2.7 supports a maximum I²C clock frequency of 100 kHz when operating within its 2.7V–5.5V supply range. This is specified in the AC Characteristics table for 2.7V/2.5V operation and ensures robust timing margins in electrically noisy environments. It does not support 400 kHz operation - that speed is reserved for the 5.0V variant (e.g., AT24C32-10SC).
Does AT24C32W-10SC-2.7 include hardware write protection?
Yes, AT24C32W-10SC-2.7 includes a dedicated Write Protect (WP) pin. When WP is tied to VCC, writes to the upper quadrant (addresses 0x2000–0x3FFF, 8K bits) are inhibited. When WP is grounded or left floating (internally pulled down), full read/write access is enabled. This hardware-level protection operates independently of firmware state.
What package type is used for AT24C32W-10SC-2.7?
AT24C32W-10SC-2.7 uses an 8-pin JEDEC SOIC package (package code 8S1), with 0.150" body width, gull-wing leads, and 1.27 mm lead pitch. Its dimensions are 4.9 mm × 3.9 mm × 1.75 mm, making it compatible with standard SOIC-8 footprints and reflow soldering processes.
How many write cycles can AT24C32W-10SC-2.7 endure?
AT24C32W-10SC-2.7 guarantees 1 million write cycles per memory location, as validated per JEDEC Standard JESD22-A117. This endurance rating applies across its full operating temperature range (-40°C to +85°C) and supports long-term field deployment in applications like utility meters and industrial controllers.
Is AT24C32W-10SC-2.7 suitable for automotive applications?
AT24C32W-10SC-2.7 is rated for industrial temperature range (-40°C to +85°C) and features >3000V HBM ESD protection, making it suitable for under-hood and cabin automotive subsystems such as body control modules and HVAC controllers. While not AEC-Q200 qualified out-of-box, it is widely deployed in automotive Tier-2 applications with appropriate system-level qualification.
AT24C32W-10SC-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32W-10SC-2.7 FAQ
1.How can I place an order for AT24C32W-10SC-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32W-10SC-2.7 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-10SC-2.7 reliable?
The price and inventory of AT24C32W-10SC-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C32W-10SC-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C32W-10SC-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32W-10SC-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32W-10SC-2.7?
AT24C32W-10SC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32W-10SC-2.7 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-10SC-2.7?
For technical support, including AT24C32W-10SC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32W-10SC-2.7 requirements.
6.How does Aetrix verify that AT24C32W-10SC-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C32W-10SC-2.7 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-10SC-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C32W-10SC-2.7?
All AT24C32W-10SC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32W-10SC-2.7, 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-10SC-2.7 part is unused and in its original packaging.
Return procedure for AT24C32W-10SC-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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