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Microchip Technology AT24C32A-10TU-1.8-T
- Part No.:
- AT24C32A-10TU-1.8-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C32A-10TU-1.8-T.pdf
- Description:
- IC EEPROM 32KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,004
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Product details
Overview
AT24C32A-10TU-1.8-T from Microchip Technology (formerly Atmel) is a 32 Kbit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 1.8 V to 5.5 V, featuring 32-byte page write mode, hardware write protection via WP pin, and 400 kHz clock compatibility. It serves as nonvolatile configuration storage in embedded controllers, sensor nodes, and power management ICs requiring low-voltage operation.
For engineers reviewing the AT24C32A-10TU-1.8-T datasheet, AT24C32A-10TU-1.8-T pinout, AT24C32A-10TU-1.8-T application, or AT24C32A-10TU-1.8-T equivalent, key selection considerations include its 1.8V minimum supply, TSSOP-8 package, 5 ms max write cycle time, 1 million endurance cycles, and Schmitt-triggered noise-immune SDA/SCL inputs.
Technical Context
The AT24C32A-10TU-1.8-T implements a two-wire I²C interface with bidirectional open-drain SDA and positive-edge-triggered SCL, supporting up to eight devices on one bus via A0–A2 address pins. It uses internal address latching and auto-incrementing during sequential reads.
Its memory architecture comprises 128 pages of 32 bytes each, enabling partial page writes and roll-over addressing within pages. Write protection is enforced by the WP pin tied to VCC, disabling all write operations while preserving read functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), sufficient for firmware calibration tables or device ID storage |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8V logic and mixed-voltage systems |
| Interface Speed | 400 kHz max - supports high-throughput configuration updates without CPU overhead |
| Write Cycle Time | 5 ms maximum - defines worst-case latency before next command can be issued |
| Endurance | 1 million write cycles - ensures reliable logging over multi-year industrial deployments |
| Data Retention | 100 years at 25°C - guarantees long-term integrity of stored calibration or security keys |
| Standby Current | 1.0 µA at 1.8 V - minimizes battery drain in always-on IoT edge sensors |
Pinout & Package
AT24C32A-10TU-1.8-T is housed in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 4.4 mm body width, RoHS-compliant lead-free finish, and industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | Hardwired low/high to select one of eight possible I²C addresses on shared bus |
| A1 | Device Address Input | Part of 3-bit hardware address; floating defaults to logic low via internal bias |
| A2 | Device Address Input | Enables cascading up to eight AT24C32A devices without software address remapping |
| GND | Ground Reference | Return path for all internal circuitry and I/O signals; must be low-impedance |
| VCC | Power Supply | Accepts 1.8–5.5 V; powers EEPROM core and I/O buffers; decoupling capacitor required |
| WP | Write Protect Control | High = full write inhibition; low = normal operation; floating defaults to protected state |
| SCL | Serial Clock Input | Positive-edge triggered; controls timing of data sampling and output; requires external pull-up |
| SDA | Serial Data I/O | Bidirectional open-drain line; shared across multiple I²C devices; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Suppresses noise on SDA/SCL lines in electrically noisy industrial environments |
| 32-byte page write mode | Reduces write transaction count by >95% vs. byte-wise writes for block updates |
| Hardware write protection | Prevents accidental or malicious overwrites without firmware intervention |
| Low standby current (1.0 µA) | Extends battery life in portable medical monitors and wireless sensor transceivers |
| 100-year data retention | Eliminates need for periodic refresh in infrastructure monitoring systems |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in pressure or humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up via I²C before analog signal conditioning begins. Use Value: Enables single-pass calibration during manufacturing and eliminates recalibration drift over 10+ years of field operation. | Use Scenario: Holding tariff schedules, metering constants, and communication protocol parameters in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store updated only during authorized firmware upgrades or utility commissioning. Use Value: Ensures regulatory compliance and billing accuracy across 15+ year product lifetime without volatile RAM backup. |
| Embedded Controller Bootloader Settings | Power Management Unit (PMU) State Mapping |
Use Scenario: Saving bootloader jump vectors, secure boot flags, and firmware version identifiers in microcontroller-based gateways. IC Role / Device Role / Timing Role: Persistent settings storage accessed during cold start before main application loads. Use Value: Guarantees fail-safe recovery and prevents bricking after interrupted OTA updates. | Use Scenario: Storing dynamic voltage/frequency scaling (DVFS) profiles and thermal throttling thresholds in PMUs for SoCs. IC Role / Device Role / Timing Role: Runtime-configurable lookup table accessed by PMU hardware logic during power state transitions. Use Value: Enables adaptive power optimization without recompiling firmware for different thermal envelopes. |
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 | 32 Kbit, 1.7–5.5 V, 400 kHz, SO8 package; lower ISB (500 nA @ 1.8 V) | Lacks dedicated WP pin; relies on software lock or external logic for write protection | Select when ultra-low standby current is critical and hardware write protect is not required. |
| CAT24C32HU4I-GT3 | 32 Kbit, 1.7–5.5 V, 400 kHz, TSSOP-8; same pinout; higher endurance (4M cycles) | Includes enhanced ESD protection (8 kV HBM); no internal address pin biasing - A0–A2 must be externally terminated | Choose for harsh ESD environments or where extended write endurance justifies minor layout change for pull-down resistors. |
Compared with M24C32-WMN6TP and CAT24C32HU4I-GT3, the AT24C32A-10TU-1.8-T offers integrated WP pin functionality and guaranteed internal pull-down on address pins - reducing BOM count and simplifying design for cost-sensitive industrial controllers.
Availability
AT24C32A-10TU-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and embedded controller bootloader settings requiring stable component supply across multi-year production cycles.
Supply support for AT24C32A-10TU-1.8-T 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 components, and memory solutions, with a focus on reliability and long-term product support.
The AT24C32A-10TU-1.8-T belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-power, low-voltage embedded systems requiring robust nonvolatile data storage in space-constrained industrial and consumer applications.
FAQ
What is the operating voltage range of the AT24C32A-10TU-1.8-T?
The AT24C32A-10TU-1.8-T operates from 1.8 V to 5.5 V, making it compatible with both 1.8 V logic families and legacy 3.3 V/5 V systems. This dual-range capability allows direct integration into mixed-voltage designs without level-shifting circuitry, and the "1.8" suffix explicitly denotes qualification down to 1.8 V minimum supply.
Does the AT24C32A-10TU-1.8-T support page writes, and what is the page size?
Yes, the AT24C32A-10TU-1.8-T supports 32-byte page writes, allowing up to 32 bytes to be written in a single I²C transaction. This significantly improves write efficiency compared to byte-wise operations - especially for storing calibration data or firmware metadata - and the internal address counter automatically increments within the page boundary.
How does the write protect (WP) pin function on the AT24C32A-10TU-1.8-T?
When the WP pin is driven high to VCC, all write operations to the AT24C32A-10TU-1.8-T memory array are inhibited, while read operations remain fully functional. If left unconnected, the WP pin is internally pulled down to GND, enabling normal writes - but Microchip recommends explicit hardwiring for production reliability.
What package type is used for the AT24C32A-10TU-1.8-T?
The AT24C32A-10TU-1.8-T uses an 8-lead TSSOP (Thin Shrink Small Outline Package) with 4.4 mm body width, RoHS-compliant lead-free finish, and industrial temperature rating (–40°C to +85°C). The "TU" in the part number explicitly identifies this TSSOP variant.
Is the AT24C32A-10TU-1.8-T pin-compatible with other AT24Cxx EEPROMs?
Yes, the AT24C32A-10TU-1.8-T shares identical pinout and electrical interface with other 8-pin AT24Cxx variants in TSSOP-8 (e.g., AT24C64A-10TU-1.8-T), enabling drop-in replacement where memory size requirements align. However, address mapping and page boundaries differ between 32K and 64K versions, so firmware must verify device identity before issuing commands.
AT24C32A-10TU-1.8-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-10TU-1.8-T FAQ
1.How can I place an order for AT24C32A-10TU-1.8-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32A-10TU-1.8-T 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-10TU-1.8-T reliable?
The price and inventory of AT24C32A-10TU-1.8-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT24C32A-10TU-1.8-T is usually 5 days.
3.What payment methods are accepted for AT24C32A-10TU-1.8-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32A-10TU-1.8-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32A-10TU-1.8-T?
AT24C32A-10TU-1.8-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32A-10TU-1.8-T 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-10TU-1.8-T?
For technical support, including AT24C32A-10TU-1.8-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32A-10TU-1.8-T requirements.
6.How does Aetrix verify that AT24C32A-10TU-1.8-T is sourced from the original manufacturer or authorized distributors?
All AT24C32A-10TU-1.8-T 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-10TU-1.8-T meets industry standards.
7.What is the process for return or replacement of AT24C32A-10TU-1.8-T?
All AT24C32A-10TU-1.8-T units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32A-10TU-1.8-T, 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-10TU-1.8-T part is unused and in its original packaging.
Return procedure for AT24C32A-10TU-1.8-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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