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Microchip Technology AT24C32A-10TI-2.7
- Part No.:
- AT24C32A-10TI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT24C32A-10TI-2.7.pdf
- Description:
- IC EEPROM 32KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,319
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Product details
Overview
AT24C32A-10TI-2.7 from Microchip Technology (formerly Atmel) is a 32K-bit I²C-compatible serial EEPROM organized as 4096 × 8 bits, operating from 2.7V to 5.5V with 400 kHz clock rate at 2.5–5.0V, 32-byte page write capability, hardware write protection via WP pin, and industrial temperature range (−40°C to +85°C). It is used for nonvolatile parameter storage in embedded controllers, power management units, and sensor calibration modules.
For engineers reviewing the AT24C32A-10TI-2.7 datasheet, AT24C32A-10TI-2.7 pinout, AT24C32A-10TI-2.7 application, or AT24C32A-10TI-2.7 equivalent, key selection considerations include supply voltage compatibility (2.7–5.5V), TSSOP-8 package footprint, 400 kHz I²C timing at ≥2.5V, WP pin functionality, and 1 million write cycle endurance.
Technical Context
The AT24C32A-10TI-2.7 implements a standard two-wire I²C interface with open-drain SDA and Schmitt-triggered SCL inputs, supporting bidirectional data transfer and device addressing via A0–A2 pins. It uses internal address latching and automatic page boundary handling during multi-byte writes.
Its memory architecture features 128 pages of 32 bytes each, with random word addressing requiring a 12-bit address. Write operations are self-timed (max 5 ms), and standby current is 2.0 µA at VCC = 2.7V - optimized for low-power battery-backed systems and industrial control nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32,768 bits (4096 × 8), enabling storage of firmware configuration, calibration coefficients, or event logs in compact embedded systems. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration with 3.3V and 5V microcontroller I/O domains without level shifting. |
| I²C Clock Rate | 400 kHz at VCC ≥ 2.5V - enables fast parameter updates while maintaining noise immunity via Schmitt-trigger inputs. |
| Page Write Capacity | 32-byte page writes - reduces transaction overhead vs. byte writes, improving efficiency in burst data logging applications. |
| Write Endurance | 1 million write cycles - ensures long-term reliability in field-updatable systems such as smart meters and industrial sensors. |
| Data Retention | 100 years at +25°C - guarantees persistent storage integrity across product lifecycles without refresh. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade operation in motor drives, PLCs, and automotive body control modules. |
| Standby Current | 2.0 µA at VCC = 2.7V - minimizes quiescent power draw in always-on monitoring circuits and battery-powered IoT endpoints. |
Pinout & Package
AT24C32A-10TI-2.7 is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 0.170" wide, with 0.65 mm lead pitch and exposed pad not present. Pin 1 is marked by a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Device Address Inputs | Hardwired or floating inputs that configure one of eight possible I²C addresses (0x50–0x57); internally pulled down if left unconnected. |
| SDA | Serial Data I/O | Open-drain bidirectional line for I²C data transfer; requires external pull-up resistor and supports wire-OR with other I²C devices. |
| SCL | Serial Clock Input | Input-only clock line with Schmitt-trigger input for noise immunity; controls timing of all read/write transactions. |
| WP | Write Protect Control | Hardware-enabled lock: tied to VCC to inhibit all writes; tied to GND for normal operation; floating defaults to write-enable. |
| VCC | Power Supply | Primary supply rail (2.7–5.5V); powers internal logic and memory array; decoupling capacitor required near pin. |
| GND | Ground Reference | System ground return path; must be low-impedance and shared with host controller to ensure signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| 2-Wire Serial Interface | Reduces PCB routing complexity and I/O count versus SPI/parallel EEPROMs; compatible with standard I²C master peripherals. |
| Schmitt Trigger Inputs | Suppresses noise on SCL/SDA lines in electrically noisy environments (e.g., motor control boards), eliminating false start/stop detection. |
| Hardware Write Protection | WP pin provides fail-safe, non-software-dependent memory lock - critical for preventing corruption during brown-out or firmware faults. |
| Self-Timed Write Cycle | Internal 5 ms max write completion eliminates need for host polling delay; ACK polling supported for precise timing control. |
| Cascadable Architecture | Up to eight AT24C32A-10TI-2.7 devices share one I²C bus using unique A0–A2 combinations - simplifies multi-sensor BOM consolidation. |
| Low-Voltage Operation | Valid down to 2.7V enables direct use with Li-ion battery-powered systems (3.0–3.7V nominal) without regulator overhead. |
Applications
| Industrial Sensor Calibration | Power Supply Configuration |
|---|---|
Use Scenario: Storing factory-trimmed gain/offset values and temperature compensation coefficients for analog sensor front-ends. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at system boot; retains data across power cycles and thermal stress. Use Value: Eliminates need for external calibration hardware; enables field recalibration via I²C without firmware update. |
Use Scenario: Holding output voltage/current setpoints, protection thresholds, and startup sequencing parameters in programmable DC-DC modules. IC Role / Device Role / Timing Role: Persistent configuration register mapped into host MCU's I²C address space; updated only during service mode. Use Value: Allows OEM customization without changing power IC firmware; supports multiple SKUs from single hardware design. |
| Smart Meter Firmware Logs | Automotive Body Control Module |
Use Scenario: Recording tamper events, voltage sags, and metering anomalies over 10+ years in utility-grade electricity meters. IC Role / Device Role / Timing Role: High-endurance data logger with atomic page writes; synchronized to real-time clock interrupts. Use Value: Meets ANSI C12.22 compliance for secure, long-life event storage without wear leveling firmware overhead. |
Use Scenario: Saving user preferences (mirror position, seat memory, lighting profiles) and diagnostic trouble codes in vehicle ECUs. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced to CAN gateway MCU via I²C; powered from always-on 3.3V rail. Use Value: Maintains settings through ignition cycles and battery disconnects; qualified per AEC-Q100 Grade 2 requirements. |
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 TSSOP-8 package, but rated for 1.7–5.5V operation and includes enhanced ESD protection (4 kV HBM). | Preferred for ultra-low-voltage designs (e.g., coin-cell IoT sensors) and high-noise automotive interiors where robustness is prioritized. | Select AT24C32D-SSHM-T when operating below 2.7V or requiring higher ESD immunity; otherwise, AT24C32A-10TI-2.7 offers proven industrial stability. |
| M24C32-WMN6TP | STMicroelectronics 32K I²C EEPROM in TSSOP-8; identical 2.5–5.5V range and 400 kHz speed, but specifies 1.8 µA standby current at 2.7V. | Used in cost-sensitive industrial HMIs and white goods where ST's qualification ecosystem aligns with existing supply chain. | Choose M24C32-WMN6TP for dual-sourcing flexibility or ST-designated platforms; AT24C32A-10TI-2.7 remains optimal for legacy Atmel/Microchip design continuity. |
Compared with AT24C32D-SSHM-T and M24C32-WMN6TP, the AT24C32A-10TI-2.7 delivers consistent 2.7–5.5V operation, industry-standard timing margins, and broad validation across industrial control and metering applications - making it the reference choice where design heritage and long-term availability are critical.
Availability
AT24C32A-10TI-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, power supply configuration, and automotive body control modules requiring stable component supply, extended lifecycle support, and guaranteed traceability.
Supply support for AT24C32A-10TI-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 AT24Cxx EEPROM family.
The AT24C32A-10TI-2.7 belongs to Microchip's serial EEPROM product line, engineered for reliable nonvolatile data storage in resource-constrained embedded systems where low power, small footprint, and I²C simplicity are essential.
FAQ
What is the maximum I²C clock frequency supported by AT24C32A-10TI-2.7?
The AT24C32A-10TI-2.7 supports up to 400 kHz I²C clock frequency when VCC is 2.5V or higher. At 1.8V operation (not applicable to this -2.7 variant), the max clock is 100 kHz. The 400 kHz rating enables efficient parameter updates in real-time control loops without introducing bus contention delays.
Does AT24C32A-10TI-2.7 require external pull-up resistors on SDA and SCL lines?
Yes, AT24C32A-10TI-2.7 requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values range from 1.8 kΩ to 10 kΩ depending on bus capacitance and clock speed; 4.7 kΩ is commonly used for 400 kHz operation with ≤400 pF total bus capacitance.
How does the WP pin function on AT24C32A-10TI-2.7?
On AT24C32A-10TI-2.7, the WP (Write Protect) pin disables all write operations when pulled high to VCC. When grounded, normal read/write access is enabled. If left floating, internal circuitry pulls it low - enabling writes by default - though Microchip recommends hardwiring WP to GND or VCC for deterministic behavior.
What package type is used for AT24C32A-10TI-2.7?
AT24C32A-10TI-2.7 uses an 8-lead Thin Shrink Small Outline Package (TSSOP), designated as 8A2 in Microchip's ordering nomenclature. It measures 3.0 mm × 4.4 mm with 0.65 mm lead pitch and is RoHS-compliant and halogen-free.
Can AT24C32A-10TI-2.7 be used in automotive applications?
AT24C32A-10TI-2.7 is rated for industrial temperature (−40°C to +85°C) and is widely deployed in automotive body control modules, infotainment settings storage, and ADAS calibration data retention. While not AEC-Q200 qualified out-of-box, it meets functional requirements for non-safety-critical automotive subsystems when validated per customer-specific stress testing.
AT24C32A-10TI-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT24C32A-10TI-2.7 FAQ
1.How can I place an order for AT24C32A-10TI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT24C32A-10TI-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 AT24C32A-10TI-2.7 reliable?
The price and inventory of AT24C32A-10TI-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 AT24C32A-10TI-2.7 is usually 5 days.
3.What payment methods are accepted for AT24C32A-10TI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT24C32A-10TI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT24C32A-10TI-2.7?
AT24C32A-10TI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT24C32A-10TI-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 AT24C32A-10TI-2.7?
For technical support, including AT24C32A-10TI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT24C32A-10TI-2.7 requirements.
6.How does Aetrix verify that AT24C32A-10TI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT24C32A-10TI-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 AT24C32A-10TI-2.7 meets industry standards.
7.What is the process for return or replacement of AT24C32A-10TI-2.7?
All AT24C32A-10TI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT24C32A-10TI-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 AT24C32A-10TI-2.7 part is unused and in its original packaging.
Return procedure for AT24C32A-10TI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT24C32A-10TI-2.7 Tags
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