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Microchip Technology AT24C32A-10TI-1.8
- Part No.:
- AT24C32A-10TI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C32A-10TI-1.8.pdf
- Description:
- IC EEPROM 32KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,650
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Product details
Overview
AT24C32A-10TI-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 100 kHz clock rate at 1.8V, 32-byte page write capability, and hardware write protection via WP pin. It is used in embedded systems for storing calibration data, configuration parameters, and firmware metadata where low-voltage operation and nonvolatile retention are critical.
For engineers reviewing the AT24C32A-10TI-1.8 datasheet, AT24C32A-10TI-1.8 pinout, AT24C32A-10TI-1.8 application, or AT24C32A-10TI-1.8 equivalent, key selection considerations include its 1.8V–5.5V supply range, TSSOP-8 package, 100-year data retention, 1 million write cycles, and I²C bus compatibility up to 400 kHz under higher VCC conditions.
Technical Context
The AT24C32A-10TI-1.8 implements a two-wire I²C interface with Schmitt-triggered, noise-filtered SDA and SCL inputs, supporting cascaded multi-device configurations via A0–A2 address pins. It uses open-drain bidirectional SDA with internal pull-down biasing on floating address and WP pins when board coupling is below 3 pF.
It features byte and page write modes, self-timed internal write cycles (max 5 ms), acknowledge polling for status detection, and hardware write protection activated by pulling WP high. Memory is organized into 128 pages of 32 bytes each, with automatic address roll-over within pages during page writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for storing device-specific configuration tables or sensor calibration coefficients in compact embedded nodes. |
| Supply Voltage Range | 1.8V to 5.5V - enables direct interfacing with 1.8V logic families and compatibility with mixed-voltage systems without level shifting. |
| I²C Clock Rate | 100 kHz at 1.8V - ensures reliable timing margin in low-power, battery-operated applications where slew rate and noise immunity are prioritized. |
| Write Endurance | 1 million write cycles - supports frequent field-updatable parameter logging (e.g., energy meter pulse counts or industrial sensor offsets). |
| Data Retention | 100 years at +25°C - guarantees long-term integrity of stored calibration data across product lifecycle without refresh mechanisms. |
| Page Write Size | 32 bytes per page - allows efficient bulk updates (e.g., writing full CAN message buffers or firmware header blocks) while minimizing bus occupancy. |
| Standby Current | 1.0 µA at 1.8V - reduces quiescent power in always-on IoT edge nodes powered by coin cells or energy harvesters. |
Pinout & Package
AT24C32A-10TI-1.8 is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 4.4 mm body width, JEDEC MO-153 compliant, with gull-wing leads and pin 1 indicator in bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or left floating (internally pulled down if board coupling <3 pF); enable up to eight devices on one I²C bus with unique 3-bit addresses. |
| SDA | Serial Data I/O | Bidirectional open-drain line requiring external pull-up; supports wire-OR with other I²C peripherals and handles ACK/NACK signaling. |
| SCL | Serial Clock Input | Positive-edge sampled input controlling data latching; negative-edge sampled for data output; filtered for EMI resilience. |
| WP | Hardware Write Protect | Pulling high to VCC disables all write operations - prevents accidental overwrites during power transitions or firmware updates. |
| GND | Ground Reference | Primary return path for VCC and signal currents; must be low-impedance to maintain noise margin on SDA/SCL lines. |
| VCC | Power Supply | Accepts 1.8V–5.5V; internal regulation ensures stable core voltage across full range; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Voltage Operation (1.8V) | Enables integration into ultra-low-power microcontroller subsystems (e.g., ARM Cortex-M0+ with 1.8V I/O) without voltage translation. |
| Schmitt Trigger & Noise Filtering | Suppresses transient noise on SDA/SCL lines in electrically noisy environments (e.g., motor drives or automotive body control modules). |
| 32-Byte Page Write Mode | Reduces I²C transaction overhead by up to 75% vs. byte writes - critical for time-constrained real-time logging applications. |
| Self-Timed Write Cycle (5 ms max) | Eliminates need for fixed delay timers in host firmware; allows precise scheduling of subsequent I²C operations after ACK polling. |
| Write Protect Pin (WP) | Provides deterministic, hardware-level memory lockout - essential for safety-critical storage (e.g., medical device calibration locks). |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
|
Use Scenario: Storing factory-calibrated gain/offset values for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during system boot and runtime recalibration sequences via I²C. Use Value: Ensures measurement accuracy remains traceable across 10+ year deployments without battery-backed SRAM or external supervision. |
Use Scenario: Holding tariff schedules, billing registers, and communication protocol settings in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store updated infrequently but read continuously during metering cycles. Use Value: Meets IEC 62056 requirements for data integrity with 1M endurance and 100-year retention under wide temperature swings. |
| IoT Edge Node State Backup | Automotive Body Control Module |
|
Use Scenario: Saving last known operational state (e.g., GPIO states, network credentials, OTA update progress) before deep-sleep entry. IC Role / Device Role / Timing Role: Low-quiescent-power persistent memory accessed only during wake-up or reset events. Use Value: Achieves sub-µA system standby current using 1.0 µA ISB1 at 1.8V - extends coin-cell life beyond 5 years. |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive comfort systems. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced to LIN or CAN gateway MCU via I²C for user preference persistence. Use Value: Qualified for -40°C to +85°C operation and halogen-free packaging - satisfies OEM AEC-Q100 stress test requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-WMN6TP | 32K SPI interface, 2.5–5.5V supply, no WP pin; requires separate chip select and different command protocol. | Lacks hardware write protect and I²C compatibility; suited for SPI-only designs with higher clock tolerance (20 MHz). | Select when existing PCB uses SPI routing and host MCU lacks I²C hardware or requires faster random access than I²C permits. |
| 24LC32A-I/P | Same 32K I²C EEPROM, PDIP-8 package, 2.5–5.5V operation; no 1.8V support; identical pinout but different package footprint. | Not suitable for 1.8V systems; requires level-shifting for low-voltage MCUs; limited to industrial temp range (-40°C to +85°C). | Choose only for legacy through-hole assembly or prototyping where TSSOP rework is impractical and 1.8V operation is unnecessary. |
Compared with M95320-WMN6TP and 24LC32A-I/P, AT24C32A-10TI-1.8 uniquely delivers guaranteed 1.8V operation, integrated WP pin, and TSSOP-8 footprint optimized for space-constrained automotive and portable electronics - making it the sole option for robust, low-voltage I²C-based configuration storage.
Availability
AT24C32A-10TI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and IoT edge node state backup requiring stable component supply across extended production lifecycles.
Supply support for AT24C32A-10TI-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT24Cxx EEPROM family, delivering high-reliability nonvolatile memory solutions since 1980.
The AT24C32A-10TI-1.8 belongs to Microchip's serial EEPROM product line, designed specifically for low-voltage, low-power embedded systems requiring robust, pin-compatible memory expansion with minimal board area and firmware overhead.
FAQ
What is the maximum I²C clock frequency supported by AT24C32A-10TI-1.8 at 1.8V?
The AT24C32A-10TI-1.8 supports a maximum I²C clock frequency of 100 kHz when operated at 1.8V, as specified in the AC Characteristics table. This ensures timing margin and noise immunity in low-voltage applications; higher frequencies (up to 400 kHz) require VCC ≥ 2.5V.
Does AT24C32A-10TI-1.8 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C32A-10TI-1.8 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and desired rise time, especially critical at 1.8V to meet tR ≤ 1.0 µs.
How does the write protect (WP) pin function on AT24C32A-10TI-1.8?
When the WP pin of AT24C32A-10TI-1.8 is driven high to VCC, all write operations (byte and page) are inhibited - protecting stored data from corruption during power-up/down or software faults. If left floating, it is internally pulled down (for board coupling <3 pF), enabling normal writes.
What is the memory organization of AT24C32A-10TI-1.8?
AT24C32A-10TI-1.8 organizes its 32,768 bits as 4096 words of 8 bits each, grouped into 128 pages of 32 bytes. The lower 5 bits of the address auto-increment during page writes, while upper bits remain static - enabling efficient sequential writes within a single page boundary.
Is AT24C32A-10TI-1.8 qualified for automotive applications?
AT24C32A-10TI-1.8 is rated for industrial temperature range (−40°C to +85°C) and offered in lead-free/halogen-free packaging, but it is not AEC-Q100 qualified. For automotive body control modules, Microchip recommends the pin-compatible AT24C32D-SSHM-T (AEC-Q100 Grade 2) instead of AT24C32A-10TI-1.8.
AT24C32A-10TI-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
AT24C32A-10TI-1.8 FAQ
1.How can I place an order for AT24C32A-10TI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32A-10TI-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 AT24C32A-10TI-1.8 reliable?
The price and inventory of AT24C32A-10TI-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 AT24C32A-10TI-1.8 is usually 5 days.
3.What payment methods are accepted for AT24C32A-10TI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32A-10TI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32A-10TI-1.8?
AT24C32A-10TI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32A-10TI-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 AT24C32A-10TI-1.8?
For technical support, including AT24C32A-10TI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32A-10TI-1.8 requirements.
6.How does Aetrix verify that AT24C32A-10TI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT24C32A-10TI-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 AT24C32A-10TI-1.8 meets industry standards.
7.What is the process for return or replacement of AT24C32A-10TI-1.8?
All AT24C32A-10TI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32A-10TI-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 AT24C32A-10TI-1.8 part is unused and in its original packaging.
Return procedure for AT24C32A-10TI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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