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Microchip Technology 24AA02T-I/ST
- Part No.:
- 24AA02T-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24AA02T-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,646
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Product details
Overview
24AA02T-I/ST 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, 400 kHz max clock frequency, and industrial temperature range (–40°C to +85°C). It supports byte and 8-byte page writes, delivers ≤1 µA standby current, and is used for secure device identification storage in embedded controllers and IoT edge nodes.
For engineers reviewing the 24AA02T-I/ST datasheet, 24AA02T-I/ST pinout, 24AA02T-I/ST application, or 24AA02T-I/ST equivalent, key selection criteria include low-voltage I²C compatibility, factory-programmable MAC address capability, WP pin-based hardware write protection, and ST (8-lead SOIC) package suitability for space-constrained industrial PCBs.
Technical Context
The 24AA02T-I/ST 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 an on-chip 8-byte page buffer and supports acknowledge polling to determine write completion. The device does not use A0–A2 pins-addressing is fixed at 1010xxx0/1-and relies solely on the WP pin for hardware-level write inhibition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for storing IEEE EUI-48 MAC address plus configuration flags |
| VCC Range | 1.7V–5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V microcontrollers without level shifters |
| I²C Clock Max | 400 kHz at VCC ≥ 2.5V - supports standard-mode I²C timing for robust communication in noisy environments |
| Write Cycle Time | ≤5 ms per byte or page - defines minimum inter-write interval for firmware timing control |
| Endurance | 1,000,000 erase/write cycles - ensures reliable field updates over 10+ years of daily reprogramming |
| Data Retention | >200 years at +85°C - guarantees persistent identity storage across product lifecycle without refresh |
| Standby Current | ≤1 µA at I-temp - minimizes quiescent power in battery-backed or energy-harvested systems |
Pinout & Package
24AA02T-I/ST is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, 3.9 mm body width, and wettable flanks for automated optical inspection (AOI) during SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Not connected | No internal bond; may be left floating or tied to VSS/VCC without functional impact |
| A1 | Not connected | No internal bond; no effect on device addressing or operation |
| A2 | Not connected | No internal bond; eliminates need for external pull-up/down resistors |
| VSS | Ground reference | Primary return path for all I/O and core logic; must be low-impedance for noise immunity |
| SDA | Serial data bidirectional I/O | Open-drain output requiring external pull-up; carries address, data, and ACK/NACK signals |
| SCL | Serial clock input | Master-generated synchronous timing signal; edge-sensitive for Start/Stop detection |
| WP | Hardware write-protect input | Logic-high disables all writes to entire memory array; critical for preventing accidental firmware corruption |
| VCC | Power supply | Supplies core EEPROM and interface logic; bypass capacitor required per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed EUI-48 MAC address | Enables plug-and-play network identity without host-side provisioning or one-time programming steps |
| Hardware write-protection via WP pin | Prevents unintended writes during power transients or firmware faults-no software lock required |
| 8-byte page write buffer | Reduces I²C bus occupancy by up to 8× versus byte-wise writes, improving system throughput |
| Schmitt-trigger inputs with 50 ns spike suppression | Ensures reliable Start/Stop detection on electrically noisy industrial buses without external filtering |
| 1.7V operation with 1 µA standby current | Supports ultra-low-power sleep modes in battery-powered sensors and wearables |
Applications
| Industrial Sensor Node ID Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing unique device identifiers and firmware revision codes in wireless temperature/humidity sensors deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile identity register accessed only at boot or commissioning; no real-time timing function. Use Value: Eliminates manual MAC assignment and enables zero-touch provisioning via standardized I²C read at power-on. | Use Scenario: Holding calibrated offset/gain coefficients for analog front-end circuits in portable ECG monitors. IC Role / Device Role / Timing Role: Read-once-at-boot parameter store; write access restricted to certified calibration stations via WP pin control. Use Value: Guarantees calibration integrity across battery cycles and prevents field tampering without secure MCU involvement. |
| IoT Gateway Secure Boot Key | Automotive Body Control Module ID |
Use Scenario: Storing cryptographic keys used to verify signed firmware images during secure boot on Linux-based gateways. IC Role / Device Role / Timing Role: Static key repository accessed once per boot; write-protected after initial provisioning. Use Value: Provides hardware-rooted trust anchor independent of main processor security state or flash reliability. | Use Scenario: Holding vehicle-specific configuration data (e.g., mirror fold settings, lighting profiles) in BCMs compliant with AEC-Q100 Grade 2. IC Role / Device Role / Timing Role: Persistent configuration memory with guaranteed 125°C extended temp support (via 24LC02B/24FC02 variants); 24AA02T-I/ST covers industrial-grade use. Use Value: Enables dealership-level personalization without requiring full ECU reflash or cloud connectivity. |
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/ST | Requires minimum 2.5V VCC; same 400 kHz I²C speed and SOIC-8 package | Not suitable for 1.8V systems; otherwise identical functionality and pinout | Select when operating exclusively above 2.5V and cost sensitivity outweighs low-voltage flexibility |
| 24AA02E48T-I/ST | Same 2-Kbit EEPROM but pre-programmed with globally unique EUI-48 address; identical electrical specs | Eliminates need for post-manufacture MAC programming; higher unit cost for guaranteed uniqueness | Select when end-product certification requires traceable, factory-assigned MAC addresses |
Compared with 24LC02B-I/ST, the 24AA02T-I/ST enables 1.7V operation critical for modern ultra-low-power designs; compared with 24AA02E48T-I/ST, it offers lower cost where user-programmed identifiers suffice.
Availability
24AA02T-I/ST is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration storage, and automotive body control modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 24AA02T-I/ST 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 leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24AA02 family is designed specifically for secure, low-power device identification and configuration storage in embedded systems-emphasizing factory-programmability, hardware write protection, and broad voltage compatibility.
FAQ
What is the maximum I²C clock frequency supported by the 24AA02T-I/ST?
The 24AA02T-I/ST supports up to 400 kHz I²C clock frequency when VCC is 2.5V or higher. At VCC between 1.7V and 2.5V, the maximum clock frequency is reduced to 100 kHz to ensure reliable timing margins. This dual-speed capability allows seamless integration across mixed-voltage systems without protocol translation.
Does the 24AA02T-I/ST require external pull-up resistors on SDA and SCL lines?
Yes, the 24AA02T-I/ST requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. Typical values are 10 kΩ for 100 kHz operation and 2 kΩ for 400 kHz, referenced to VCC. Proper resistor selection ensures rise time compliance per I²C specification and avoids bus contention.
Can the A0, A1, and A2 pins of the 24AA02T-I/ST be used to configure device addressing?
No-the A0, A1, and A2 pins of the 24AA02T-I/ST are not internally connected and serve no addressing function. The device uses a fixed I²C client address (1010xxxR/W) where the three middle bits are "don't care," resulting in a single hardwired address. This simplifies multi-device bus design by eliminating address jumpers or configuration resistors.
How does hardware write-protection work on the 24AA02T-I/ST?
Hardware write-protection on the 24AA02T-I/ST is controlled by the WP pin: when tied to VCC, all write operations (byte and page) to the entire 256-byte memory array are inhibited while read operations remain fully functional. When WP is tied to VSS or left floating, normal read/write access is enabled. This provides fail-safe protection against accidental or malicious overwrites.
Is the 24AA02T-I/ST qualified for automotive applications?
The 24AA02T-I/ST is rated for industrial temperature range (–40°C to +85°C) and is RoHS compliant, but it is not AEC-Q100 qualified. For automotive applications requiring qualification, Microchip offers the 24LC02B and 24FC02 variants-both AEC-Q100 Grade 2 qualified and available in compatible SOIC-8 packages such as 24LC02B-I/ST.
24AA02T-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- 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:
- 8-TSSOP
24AA02T-I/ST FAQ
1.How can I place an order for 24AA02T-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24AA02T-I/ST 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/ST reliable?
The price and inventory of 24AA02T-I/ST 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/ST is usually 5 days.
3.What payment methods are accepted for 24AA02T-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24AA02T-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24AA02T-I/ST?
24AA02T-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24AA02T-I/ST 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/ST?
For technical support, including 24AA02T-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24AA02T-I/ST requirements.
6.How does Aetrix verify that 24AA02T-I/ST is sourced from the original manufacturer or authorized distributors?
All 24AA02T-I/ST 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/ST meets industry standards.
7.What is the process for return or replacement of 24AA02T-I/ST?
All 24AA02T-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24AA02T-I/ST, 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/ST part is unused and in its original packaging.
Return procedure for 24AA02T-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24AA02T-I/ST Tags
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