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Microchip Technology AT24C32AW-10SU-2.7
- Part No.:
- AT24C32AW-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT24C32AW-10SU-2.7.pdf
- Description:
- IC EEPROM 32KBIT I2C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,235
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Product details
Overview
AT24C32AW-10SU-2.7 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 the WP pin, 32-byte page write capability, and 400 kHz bus speed compatibility. It is used in industrial control modules for nonvolatile parameter storage requiring low-voltage operation and long-term data retention.
For engineers reviewing the AT24C32AW-10SU-2.7 datasheet, AT24C32AW-10SU-2.7 pinout, AT24C32AW-10SU-2.7 application, or AT24C32AW-10SU-2.7 equivalent, this device serves as a drop-in-capable serial memory solution in space-constrained embedded systems where 2.7–5.5 V supply, 100-year data retention, and Schmitt-trigger noise immunity are critical selection criteria.
Technical Context
The AT24C32AW-10SU-2.7 implements a two-wire I²C interface with open-drain SDA and active-high SCL, supporting standard-mode (400 kHz) timing across 1.8V–5.5V supply ranges. Its internal address counter enables current-address, random-address, and sequential read modes without external address latching.
It uses three hardware address pins (A0–A2) to support up to eight devices on a shared bus, and integrates an internal pull-down bias for floating A0–A2 and WP pins when board coupling capacitance is below 3 pF. Write operations are self-timed with a maximum 5 ms cycle and include acknowledge polling support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), enabling storage of firmware calibration tables or device configuration profiles |
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V microcontrollers without level shifting |
| Interface Speed | 400 kHz I²C clock - ensures deterministic timing for real-time parameter updates in industrial PLCs |
| Write Endurance | 1 million cycles - suitable for logging applications with frequent write events over product lifetime |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored calibration or security keys |
| Standby Current | 2.0 µA at 2.7 V - minimizes power draw in battery-backed or energy-harvesting sensor nodes |
| Page Write Size | 32 bytes - allows efficient bulk writes while avoiding cross-page boundary errors during partial updates |
Pinout & Package
AT24C32AW-10SU-2.7 is packaged in an 8-lead EIAJ SOIC (8S2) - 0.209" body width, RoHS-compliant, green package with NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating (internally pulled down); enable up to eight devices on one I²C bus |
| SDA | Serial Data I/O | Open-drain bidirectional line - requires external pull-up; supports wire-OR with other I²C peripherals |
| SCL | Serial Clock Input | Positive-edge clock input for data-in; negative-edge sampling for data-out; Schmitt-triggered for noise immunity |
| WP | Write Protect Control | Hardware lock: tied to VCC disables all writes; floating defaults to GND (write enabled) if board coupling <3 pF |
| GND | Ground Reference | Signal return path for logic and I/O; must be low-impedance to ensure stable SDA/SCL thresholds |
| VCC | Power Supply | Primary supply rail (2.7–5.5 V); powers internal EEPROM array, interface logic, and address decoder |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire Serial Interface | Fully compliant with I²C protocol - supports standard-mode (400 kHz), simplifies PCB routing and reduces MCU pin count |
| Schmitt Trigger Inputs | Integrated noise filtering on SDA/SCL - eliminates false start/stop detection in electrically noisy industrial environments |
| Hardware Write Protection | WP pin directly inhibits all write cycles when driven high - prevents accidental corruption during power transients or firmware glitches |
| 32-byte Page Write Mode | Enables burst writes within a single page - reduces I²C transaction overhead and improves update efficiency vs. byte-by-byte writes |
| Self-timed Write Cycle | Internal 5 ms max erase/write completion - eliminates need for fixed delay timers; supports acknowledge polling for precise timing control |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and temperature compensation parameters for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register - retains values across power cycles and enables field recalibration without firmware reflash. Use Value: Eliminates need for external backup batteries or supercapacitors while guaranteeing 100-year data retention under industrial temperature range (–40°C to +85°C). |
Use Scenario: Holding tariff schedules, meter ID, billing history, and tamper-event logs in utility-grade electricity meters with strict regulatory data integrity requirements. IC Role / Device Role / Timing Role: Secure parameter vault - WP pin hardwired to VCC prevents unauthorized firmware or tariff modifications during field deployment. Use Value: Meets ANSI C12.19 and IEC 62056 compliance by ensuring write-protection and 1M endurance for daily log updates over 15+ year service life. |
| Medical Device Settings Backup | Automotive Body Control Module (BCM) |
Use Scenario: Preserving user-adjusted therapy parameters (e.g., infusion rate, alarm thresholds) in portable infusion pumps between battery swaps and firmware updates. IC Role / Device Role / Timing Role: Low-power configuration keeper - draws only 2.0 µA standby current at 2.7 V to extend battery life in Class II medical equipment. Use Value: Enables >5-year shelf life and >2-year operational life on primary lithium cells while maintaining FDA-required audit trail integrity. |
Use Scenario: Storing door lock/unlock patterns, mirror position presets, and lighting profiles in automotive BCMs where space and thermal performance are constrained. IC Role / Device Role / Timing Role: Compact memory node - 8S2 package (5.13 mm × 7.70 mm) fits tight PCB layouts; operates reliably from –40°C to +85°C per AEC-Q200 stress testing. Use Value: Reduces BOM count versus discrete OTP solutions while meeting automotive qualification for vibration, thermal cycling, and ESD robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Microchip AT24C32D-SSHM-T | Same 32K capacity, 1.7–5.5 V range, but uses 8-lead SOIC (8S1) and supports 1 MHz I²C mode | Higher-speed interface suits fast-booting automotive gateways; not qualified for extended temperature range | Select when system clock exceeds 400 kHz and ambient temperature stays within 0°C to +70°C |
| ON Semiconductor CAT24C32WI-GT3 | Identical 32K × 8 organization and 2.7–5.5 V range, but rated for –40°C to +125°C and features enhanced ESD protection (4 kV HBM) | Better suited for under-hood automotive or high-reliability industrial edge nodes exposed to extreme thermal cycling | Prefer when operating beyond +85°C or requiring higher ESD immunity in harsh EMC environments |
Compared with AT24C32AW-10SU-2.7, the AT24C32D-SSHM-T offers faster I²C throughput but narrower temperature tolerance, while the CAT24C32WI-GT3 extends thermal range and ESD robustness at the cost of slightly higher standby current (3 µA vs. 2 µA at 2.7 V).
Availability
AT24C32AW-10SU-2.7 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical device design requiring stable component supply, long-lifecycle assurance, and RoHS-compliant green packaging.
Supply support for AT24C32AW-10SU-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, technical documentation, and manufacturing control for the AT24Cxx EEPROM family.
The AT24C32AW-10SU-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with minimal footprint and interface complexity.
FAQ
What is the operating voltage range for AT24C32AW-10SU-2.7?
The AT24C32AW-10SU-2.7 operates from 2.7 V to 5.5 V DC. This range allows direct integration with common 3.3 V and 5 V logic families without level-shifting circuitry. The "–2.7" suffix explicitly denotes the 2.7V minimum operating voltage variant, distinct from the 1.8V version (e.g., AT24C32AW-10SU-1.8). Performance parameters such as I²C timing and standby current are specified across this full range.
Does AT24C32AW-10SU-2.7 support multi-device I²C bus configurations?
Yes, AT24C32AW-10SU-2.7 supports cascading up to eight devices on a single I²C bus using its three hardware address inputs (A0, A1, A2). Each device is assigned a unique 3-bit address by hardwiring these pins to VCC or GND. When left floating, internal pull-downs default them to logic low, resulting in base address 0x50 - a configuration that must be verified against board-level capacitive coupling to avoid unintended addressing conflicts.
How does the write protect (WP) pin function on AT24C32AW-10SU-2.7?
The WP pin on AT24C32AW-10SU-2.7 provides hardware-level write inhibition: when driven high to VCC, all write operations (byte and page) are blocked. When grounded or left floating (with board coupling <3 pF), writes are enabled. Unlike software-based locks, this feature remains active during brown-out or reset conditions, making it essential for safeguarding critical calibration data in safety-critical systems.
What is the maximum I²C clock frequency supported by AT24C32AW-10SU-2.7?
AT24C32AW-10SU-2.7 supports a maximum I²C clock frequency of 400 kHz across its entire 2.7–5.5 V supply range and –40°C to +85°C temperature range. This standard-mode speed is sufficient for most configuration storage and telemetry logging tasks. It does not support fast-mode (1 MHz) or high-speed mode - attempting higher frequencies may result in timing violations and communication failures.
Is AT24C32AW-10SU-2.7 qualified for automotive applications?
No, AT24C32AW-10SU-2.7 is specified for industrial temperature range (–40°C to +85°C) and is not AEC-Q200 qualified. While it may function in some automotive body electronics, Microchip explicitly states that "Atmel products are not intended, authorized, or warranted for use in automotive applications." For automotive use, consider AEC-Q200-qualified alternatives like the CAT24C32WI-GT3 or Microchip's automotive-grade 24AA32A variants.
AT24C32AW-10SU-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:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT24C32AW-10SU-2.7 FAQ
1.How can I place an order for AT24C32AW-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32AW-10SU-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 AT24C32AW-10SU-2.7 reliable?
The price and inventory of AT24C32AW-10SU-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 AT24C32AW-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C32AW-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32AW-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32AW-10SU-2.7?
AT24C32AW-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32AW-10SU-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 AT24C32AW-10SU-2.7?
For technical support, including AT24C32AW-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32AW-10SU-2.7 requirements.
6.How does Aetrix verify that AT24C32AW-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C32AW-10SU-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 AT24C32AW-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C32AW-10SU-2.7?
All AT24C32AW-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32AW-10SU-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 AT24C32AW-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT24C32AW-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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