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Microchip Technology 24AA02T-I/OT
- Part No.:
- 24AA02T-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24AA02T-I/OT.pdf
- Description:
- IC EEPROM 2KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:21,511
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Product details
Overview
24AA02T-I/OT from Microchip Technology Inc. is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protection, 1.7V–5.5V operation, and industrial temperature range (–40°C to +85°C). It supports up to 400 kHz clock frequency, features 8-byte page write buffer, and delivers ≤1 µA standby current - used for secure device identification and configuration storage in embedded controllers.
For engineers reviewing the 24AA02T-I/OT datasheet, 24AA02T-I/OT pinout, 24AA02T-I/OT application, or 24AA02T-I/OT equivalent, key selection considerations include its I²C address compatibility (fixed 1010xxx0/1), WP pin-controlled full-array write protection, low-voltage operation down to 1.7V, and AEC-Q100 qualification for automotive subsystems.
Technical Context
The 24AA02T-I/OT implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer enables current-address, random, and sequential read modes without external addressing logic.
It uses self-timed erase/write cycles with 5 ms maximum page write time and supports acknowledge polling to determine write completion. The device contains no internal connections to A0/A1/A2 pins - simplifying PCB layout and eliminating address conflicts in multi-device I²C buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) - sufficient for MAC address storage, calibration data, or boot configuration in space-constrained designs |
| Interface | I²C (Two-Wire Serial) - compatible with standard microcontroller I²C peripherals without protocol translation |
| Supply Voltage | 1.7V–5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V systems without level shifters |
| Max Clock Frequency | 400 kHz (at VCC ≥ 2.5V); 100 kHz (at 1.7V ≤ VCC < 2.5V) - defines achievable write throughput and bus timing margins |
| Write Endurance | 1,000,000 cycles - supports frequent field updates such as logging or parameter tuning over product lifetime |
| Data Retention | 200 years - ensures long-term reliability of stored identifiers or calibration coefficients without refresh |
| Standby Current | ≤1 µA (I-temp.) - critical for battery-powered nodes where EEPROM must remain powered during sleep |
Pinout & Package
24AA02T-I/OT is packaged in a 5-lead SC-70 (Microchip package code LT), measuring 2.00 mm × 1.25 mm × 0.80 mm, with wettable flanks for automated optical inspection. Pin 1 is marked by a dot; leads are matte tin-plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock Input | Asynchronous master-generated clock synchronizing all I²C transactions; requires external pull-up |
| SDA | Serial Data I/O | Bidirectional open-drain line shared across I²C bus; requires external pull-up resistor (2 kΩ typical at 400 kHz) |
| WP | Write-Protect Input | Logic-high disables all writes to entire memory array (00h–FFh); tied to VSS for full read/write access |
| VSS | Ground Reference | System ground return path; must be low-impedance to minimize noise coupling into SDA/SCL |
| VCC | Power Supply | Single supply input supporting 1.7V–5.5V; decoupling capacitor (0.1 µF) required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC eliminates false triggering from bus noise in electrically noisy environments |
| Output Slope Control | Controlled SDA/SCL rise/fall times prevent ground bounce and EMI during high-speed switching |
| Page Write Buffer | 8-byte buffer enables burst writes within one I²C transaction - reduces bus arbitration overhead vs. byte-by-byte writes |
| Hardware Write-Protection | WP pin directly gates internal write logic - provides tamper-resistant configuration lock without firmware involvement |
| AEC-Q100 Qualified | Qualified for automotive applications (Grade 2: –40°C to +105°C ambient) - validated for engine control, body electronics, and ADAS modules |
Applications
| Secure Device Identity Storage | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing unique 48-bit IEEE MAC address and device serial number in networked edge sensors. IC Role / Device Role / Timing Role: Nonvolatile identity register accessed once at power-on via I²C; no timing-critical operation. Use Value: Enables plug-and-play deployment without manual provisioning; leverages factory-programmable capability and 200-year data retention. | Use Scenario: Saving temperature-compensated offset/gain coefficients after factory calibration of pressure transducers. IC Role / Device Role / Timing Role: Configuration memory written once per unit during test; read at startup to initialize ADC scaling. Use Value: Eliminates need for external calibration storage; 1M endurance supports re-calibration in field service units. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Holding user-configurable settings (e.g., mirror position, seat memory) in automotive door modules. IC Role / Device Role / Timing Role: Persistent settings store accessed via I²C during wake-up; WP pin tied to VCC when module enters sleep mode. Use Value: Hardware-level write protection prevents accidental corruption during power transients; AEC-Q100 qualification ensures reliability under vehicle vibration/thermal stress. | Use Scenario: Storing regulatory-compliant device ID, firmware version history, and usage counters in portable ultrasound probes. IC Role / Device Role / Timing Role: Secure audit log memory updated after each diagnostic session; accessed only during maintenance mode. Use Value: Tamper-evident storage enabled by WP pin; 1.7V operation allows retention during brown-out conditions common in battery-backed medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC02B-I/OT | Requires minimum 2.5V VCC; max 400 kHz only above 2.5V; no 1.7V support | Not suitable for 1.8V systems or battery-powered devices operating below 2.5V | Select only if system VCC is guaranteed ≥2.5V and AEC-Q100 is not required |
| 24FC02-I/OT | Supports 1 MHz I²C clock; higher speed but identical pinout and memory map | Enables faster configuration loading in high-throughput production test environments | Choose when bus bandwidth is constrained and host controller supports 1 MHz I²C timing |
Compared with 24LC02B-I/OT, the 24AA02T-I/OT enables lower-voltage operation and automotive qualification; compared with 24FC02-I/OT, it trades maximum speed for broader voltage compatibility and cost efficiency in non-bandwidth-limited applications.
Availability
24AA02T-I/OT is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, and medical diagnostic equipment requiring stable component supply, long-term traceability, and AEC-Q100 compliance.
Supply support for 24AA02T-I/OT 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 Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.
The 24AA02T-I/OT belongs to Microchip's 24XX02 family of I²C EEPROMs designed specifically for secure, low-power, and automotive-grade device identification and configuration storage.
FAQ
What is the I²C address of the 24AA02T-I/OT?
The 24AA02T-I/OT uses a fixed 7-bit I²C client address of 1010xxx, where the three least-significant bits (xxx) are "don't care" - resulting in a single hardwired address (0xA0 for write, 0xA1 for read). This eliminates address conflict risks in multi-device buses and simplifies firmware implementation. No external A0/A1/A2 pull-ups are needed since those pins are internally unconnected.
Does the 24AA02T-I/OT support 1.8V operation?
Yes, the 24AA02T-I/OT fully supports 1.8V operation: its VCC range is 1.7V–5.5V, and it maintains full I²C functionality at 1.8V (with 100 kHz clock limit per datasheet Table 1-2). This makes the 24AA02T-I/OT suitable for modern ultra-low-power microcontrollers and battery-operated devices where 1.8V rails are standard.
How does the WP pin function on the 24AA02T-I/OT?
On the 24AA02T-I/OT, the WP pin is a dedicated hardware write-protection input: when tied to VCC, all write operations (byte and page) to the entire 256-byte memory array are inhibited; reads remain fully functional. When tied to VSS (or left floating, though VSS is recommended), normal read/write access is enabled. This provides deterministic, firmware-independent protection against accidental or malicious writes.
Is the 24AA02T-I/OT pin-compatible with other 24XX02 variants?
Yes, the 24AA02T-I/OT shares identical pinout, footprint, and signal mapping with all members of the 24XX02 family in the same package - including 24LC02B-I/OT and 24FC02-I/OT in SC-70 (LT) packaging. All use the same 5-pin SCL/SDA/WP/VSS/VCC arrangement with no internal A0–A2 connections, enabling drop-in replacement where voltage and speed requirements align.
What is the maximum write cycle time for the 24AA02T-I/OT?
The maximum write cycle time for the 24AA02T-I/OT is 5 ms for both byte and page writes (per datasheet parameter TWC). During this time, the device does not acknowledge I²C commands - a behavior leveraged by acknowledge polling to detect write completion. This fixed timing enables predictable firmware delay handling without reliance on status registers.
24AA02T-I/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 400 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 900 ns
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24AA02T-I/OT FAQ
1.How can I place an order for 24AA02T-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA02T-I/OT 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 24AA02T-I/OT reliable?
The price and inventory of 24AA02T-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24AA02T-I/OT is usually 5 days.
3.What payment methods are accepted for 24AA02T-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA02T-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA02T-I/OT?
24AA02T-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA02T-I/OT 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 24AA02T-I/OT?
For technical support, including 24AA02T-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA02T-I/OT requirements.
6.How does Aetrix verify that 24AA02T-I/OT is sourced from the original manufacturer or authorized distributors?
All 24AA02T-I/OT 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 24AA02T-I/OT meets industry standards.
7.What is the process for return or replacement of 24AA02T-I/OT?
All 24AA02T-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24AA02T-I/OT, 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 24AA02T-I/OT part is unused and in its original packaging.
Return procedure for 24AA02T-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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