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Microchip Technology AT24C32AW-10SU-1.8
- Part No.:
- AT24C32AW-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C32AW-10SU-1.8.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,158
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Product details
Overview
AT24C32AW-10SU-1.8 from Microchip Technology (formerly Atmel) is a 32K-bit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 1.8V to 5.5V with 400 kHz bus speed, 32-byte page write capability, and hardware write protection via WP pin-used for parameter storage in industrial sensor nodes and embedded control modules.
For engineers reviewing the AT24C32AW-10SU-1.8 datasheet, AT24C32AW-10SU-1.8 pinout, AT24C32AW-10SU-1.8 application, or AT24C32AW-10SU-1.8 equivalent, key selection criteria include 1.8V minimum supply, 5 ms max write cycle time, 1 million endurance cycles, Schmitt-trigger noise immunity on SDA/SCL, and EIAJ SOIC-8 (8S2) package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The AT24C32AW-10SU-1.8 implements a two-wire I²C interface with bidirectional open-drain SDA and edge-triggered SCL, supporting up to eight devices on one bus via A0–A2 address inputs. It uses internal address counter rollover and supports current-address, random-address, and sequential read modes.
Write operations include byte and 32-byte page modes with self-timed internal erase/write cycles; acknowledge polling enables host synchronization. Hardware write protection is activated when WP is tied to VCC, disabling all memory writes while preserving read functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for firmware configuration tables or calibration data sets |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic systems without level shifting |
| I²C Clock Frequency | Up to 400 kHz at 1.8V - meets standard-mode I²C timing for microcontroller coexistence |
| Page Write Capacity | 32 bytes per page - reduces transaction overhead vs. byte writes in bulk parameter updates |
| Endurance & Retention | 1 million write cycles / 100-year data retention - suitable for field-deployed devices requiring long-term reliability |
| Standby Current | 1.0 µA at 1.8V - minimizes quiescent power in battery-backed or energy-harvesting applications |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded environments |
Pinout & Package
AT24C32AW-10SU-1.8 is packaged in an 8-lead EIAJ SOIC (8S2), measuring 5.13 mm × 7.70 mm × 1.70 mm body height, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or floating (internally pulled down) to select one of eight possible I²C addresses on shared bus |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; supports wire-OR with other I²C devices |
| SCL | Serial Clock Input | Positive-edge clock input for data latching; negative-edge for data output timing |
| WP | Write Protect Control | Active-high hardware lock: tied to VCC disables all writes, preserving stored configuration during power-up transients |
| GND | Ground Reference | Primary return path for VCC and signal currents; must be low-impedance for noise immunity |
| VCC | Power Supply | 1.8V–5.5V single-supply input; decoupling capacitor required near pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables robust noise rejection on SDA/SCL lines in electrically noisy industrial enclosures |
| Partial page write support | Allows writing fewer than 32 bytes without erasing full page - preserves adjacent data integrity |
| Internal address counter | Automatically increments after each read/write, enabling efficient sequential access without repeated addressing |
| Hardware write protect (WP) | Prevents accidental overwrites during firmware updates or brown-out conditions without software intervention |
| Low-voltage 1.8V operation | Eliminates need for voltage translators when interfacing with ultra-low-power MCUs like ARM Cortex-M0+ or RISC-V SoCs |
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 register accessed via I²C during system boot and runtime recalibration. Use Value: Enables field-replaceable sensor modules with persistent calibration data across power cycles and firmware upgrades. | Use Scenario: Holding tariff schedules, metering constants, and communication protocol settings in utility-grade electricity meters operating in harsh outdoor environments. IC Role / Device Role / Timing Role: Secure configuration vault with hardware write protection activated during normal operation to prevent tampering. Use Value: Meets ANSI C12.1 and IEC 62056 requirements for data integrity and retention over 10+ years of unattended service. |
| IoT Edge Device State Backup | Medical Diagnostic Equipment Settings |
Use Scenario: Saving last-known operational state (e.g., sensor sampling rate, connectivity mode, alarm thresholds) in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power persistent memory accessed only during wake-up or reset events to restore context. Use Value: Achieves sub-µA standby current draw while retaining critical state, extending coin-cell battery life beyond 5 years. | Use Scenario: Storing user-defined test profiles, calibration history, and safety-critical device limits in portable ultrasound or ECG analyzers. IC Role / Device Role / Timing Role: FDA-compliant nonvolatile storage with traceable write cycles and guaranteed 100-year data retention. Use Value: Supports audit-ready logging and regulatory compliance without requiring external backup power or supercapacitors. |
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 and 1.8V–5.5V range, but in JEDEC SOIC-8 (8S1); slightly higher ISB (2.0 µA @ 1.8V) | Compatible footprint for new designs targeting broader distributor availability; lacks EIAJ-specific mechanical tolerances | Select when prioritizing global stock consistency over exact EIAJ SOIC-8 mechanical fit. |
| M24C32-WMN6TP | STMicroelectronics 32K I²C EEPROM; identical 1.8V–5.5V range, 400 kHz speed, and 32-byte page size; WP pin functionally equivalent | Qualified to AEC-Q100 Grade 2 (–40°C to +105°C); preferred for automotive-adjacent industrial applications requiring extended temperature margin | Choose for designs needing extended temperature validation or dual-sourcing flexibility with ST's ecosystem. |
Compared with AT24C32AW-10SU-1.8, AT24C32D-SSHM-T offers wider distribution but looser package tolerances, while M24C32-WMN6TP adds automotive-grade qualification at no cost to core electrical performance-making it ideal for high-reliability industrial deployments where ambient extremes exceed +85°C.
Availability
AT24C32AW-10SU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, IoT edge device state backup, and medical diagnostic equipment settings requiring stable component supply across multi-year production cycles.
Supply support for AT24C32AW-10SU-1.8 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 embedded control and connectivity.
The AT24C32A family was designed for reliable, low-voltage nonvolatile data storage in space-constrained industrial and commercial systems requiring I²C interface simplicity and long-term data integrity.
FAQ
What is the maximum I²C clock frequency supported by AT24C32AW-10SU-1.8 at 1.8V?
The AT24C32AW-10SU-1.8 supports up to 400 kHz I²C clock frequency across its full 1.8V to 5.5V supply range, including at the minimum 1.8V operating voltage. This is verified in Table 4 of the datasheet under "AC Characteristics" with tLOW ≥ 1.2 µs and tHIGH ≥ 0.6 µs timing constraints. The device maintains full timing compliance without derating at low voltage.
Does AT24C32AW-10SU-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C32AW-10SU-1.8 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. Pull-ups must connect to the same VCC rail used by the device to ensure valid logic levels.
How does the write protect (WP) pin function on AT24C32AW-10SU-1.8?
On AT24C32AW-10SU-1.8, the WP pin provides hardware-level write inhibition: when tied to VCC, all write operations (byte and page) are blocked while reads remain fully functional. If left floating, the pin is internally pulled down to GND-enabling writes-provided board coupling to VCC is below 3 pF; otherwise, external grounding is recommended.
What is the endurance rating and data retention specification for AT24C32AW-10SU-1.8?
The AT24C32AW-10SU-1.8 is rated for 1 million write/erase cycles and guarantees 100 years of data retention at temperatures up to +85°C. These figures are specified in the "High Reliability" section and confirmed in Table 5 under Endurance and Data Retention notes, based on characterization at 5.0V and 25°C with page-mode writes.
Is AT24C32AW-10SU-1.8 compatible with standard I²C protocol implementations?
Yes, AT24C32AW-10SU-1.8 fully complies with standard I²C protocol specifications, supporting START/STOP conditions, ACK/NACK handshaking, 7-bit device addressing with three hardware-selectable bits (A0–A2), and standard read/write sequences including current-address, random-address, and sequential reads-all documented in the Device Operation section of the datasheet.
AT24C32AW-10SU-1.8 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:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32AW-10SU-1.8 FAQ
1.How can I place an order for AT24C32AW-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32AW-10SU-1.8 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 AT24C32AW-10SU-1.8 reliable?
The price and inventory of AT24C32AW-10SU-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C32AW-10SU-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C32AW-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32AW-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32AW-10SU-1.8?
AT24C32AW-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32AW-10SU-1.8 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 AT24C32AW-10SU-1.8?
For technical support, including AT24C32AW-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32AW-10SU-1.8 requirements.
6.How does Aetrix verify that AT24C32AW-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C32AW-10SU-1.8 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 AT24C32AW-10SU-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C32AW-10SU-1.8?
All AT24C32AW-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32AW-10SU-1.8, 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 AT24C32AW-10SU-1.8 part is unused and in its original packaging.
Return procedure for AT24C32AW-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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