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Microchip Technology 24LC02BT-I/OT
- Part No.:
- 24LC02BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC02BT-I/OT.pdf
- Description:
- IC EEPROM 2KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,723
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Product details
Overview
24LC02BT-I/OT from Microchip Technology Inc. is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protection, 400 kHz max clock frequency, and industrial temperature range (–40°C to +85°C). It operates from 2.5V to 5.5V, supports 8-byte page writes, and is used for parameter storage in embedded controllers, sensor calibration data retention, and configuration backup in power-constrained systems.
For engineers reviewing the 24LC02BT-I/OT datasheet, 24LC02BT-I/OT pinout, 24LC02BT-I/OT application, or 24LC02BT-I/OT equivalent, this page delivers verified electrical specs, package mapping to SOT-23-5, I²C timing constraints, endurance and retention data, and real-world use context for reliable BOM selection and firmware integration.
Technical Context
The 24LC02BT-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, while the 8-byte page buffer allows burst writes within a single physical page boundary.
Write protection is implemented via the dedicated WP pin: tied to VSS for full read/write access, tied to VCC to inhibit all write operations across the entire 256-byte array. The device uses self-timed erase/write cycles with no external timing components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for storing calibration coefficients, device IDs, or small firmware flags |
| Interface | I²C-compatible two-wire bus, compatible with standard microcontroller I²C peripherals without protocol translation |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V, enabling ~400 byte/s write throughput in page mode |
| Write Cycle Time | 5 ms maximum per byte or page, defining minimum inter-write delay in time-critical logging |
| Endurance | 1 million erase/write cycles, supporting daily reconfiguration over 27 years of operation |
| Data Retention | 200 years at +85°C, ensuring long-term reliability in unpowered storage applications |
| Supply Voltage | 2.5V to 5.5V, matching standard logic rails and eliminating need for level shifters in 3.3V/5V systems |
Pinout & Package
24LC02BT-I/OT is packaged in a 5-lead SOT-23 (SC-70) surface-mount package with wettable flanks, measuring 2.2 mm × 1.35 mm × 1.0 mm (L × W × H), optimized for space-constrained PCB layouts and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock Input | Asynchronous master-generated clock synchronizing all I²C transfers; requires external pull-up resistor |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O leakage currents; must be low-impedance |
| SDA | Serial Data I/O | Bidirectional open-drain line for address/data transfer; requires external pull-up resistor (2 kΩ typical for 400 kHz) |
| WP | Write-Protect Control | Logic-level input: VSS enables full read/write, VCC disables all writes (read-only mode) |
| VCC | Power Supply | Single supply input (2.5–5.5V); powers EEPROM core, interface logic, and charge pump for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt Trigger Inputs | Noise immunity on SCL/SDA lines up to 50 ns spike suppression, enabling robust operation in electrically noisy environments |
| Output Slope Control | Controlled rise/fall times prevent ground bounce during bus transitions, reducing EMI and signal integrity issues |
| Hardware Write-Protection | Dedicated WP pin provides tamper-resistant, non-volatile lockout of memory writes without firmware intervention |
| Page Write Buffer | 8-byte internal buffer enables efficient burst writes-reducing host CPU overhead and I²C bus occupancy by 8× vs. byte writes |
| Low-Power Operation | 1 µA max standby current at I-temp ensures minimal battery drain in always-on or sleep-mode applications |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain values for analog sensors in HVAC control units operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at power-up via I²C; retains data through 10+ year product lifecycle. Use Value: Eliminates need for external calibration trimmers or reprogramming during field service, reducing BOM cost and maintenance labor. | Use Scenario: Holding user-defined settings (e.g., display brightness, network timeout) in smart thermostats with battery backup. IC Role / Device Role / Timing Role: Parameter storage IC interfaced to MCU's I²C peripheral; accessed during boot and runtime updates. Use Value: Enables persistent settings across power cycles with <1 µA standby draw, extending coin-cell life beyond 5 years. |
| Medical Device Safety Logs | IoT Edge Node Identity Storage |
Use Scenario: Recording critical fault timestamps and error codes in portable diagnostic equipment requiring regulatory-compliant data retention. IC Role / Device Role / Timing Role: Tamper-evident log memory with hardware WP enabled during normal operation to prevent accidental overwrite. Use Value: Meets IEC 62304 data integrity requirements via 1M-cycle endurance and 200-year retention at end-of-life temperature. | Use Scenario: Storing unique device identifiers (MAC, serial number) and cryptographic keys in battery-powered asset trackers. IC Role / Device Role / Timing Role: Secure identity vault accessed once at initialization; WP pin tied to VCC after provisioning to lock contents. Use Value: Prevents unauthorized key extraction or cloning via physical pin-level write disable-no software vulnerability surface. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA02T-I/OT | Lower VCC min (1.7V), same 400 kHz speed, identical SOT-23-5 package and pinout | Better suited for 1.8V systems; not rated for 2.5V-only operation like 24LC02BT-I/OT | Select when system supply drops below 2.5V; verify WP behavior and timing under 1.7–2.4V conditions |
| AT24C02D-SSHM-T | Same 2-Kbit size, 400 kHz I²C, but uses 8-lead SOIC package and has different WP implementation (active-high enable) | Requires PCB layout change; lacks SOT-23 footprint compatibility and industrial temp validation per Microchip spec | Choose only if SOIC packaging is preferred and AT24C02D's A0/A1 addressing flexibility is needed for multi-device buses |
Compared with 24AA02T-I/OT, the 24LC02BT-I/OT offers tighter voltage-range assurance above 2.5V and guaranteed industrial-temp performance, while AT24C02D-SSHM-T introduces package and addressing differences that impact layout and firmware portability.
Availability
24LC02BT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and medical device safety logs requiring stable component supply and long-term traceability.
Supply support for 24LC02BT-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 with a focus on embedded control and connectivity.
The 24LC02B family was designed for cost-sensitive, space-constrained applications needing reliable nonvolatile storage with minimal external components and robust I²C interoperability.
FAQ
What is the operating voltage range for the 24LC02BT-I/OT?
The 24LC02BT-I/OT operates from 2.5V to 5.5V DC. This range ensures compatibility with common 3.3V and 5V logic systems while excluding sub-2.5V operation-unlike the 24AA02 variant. Operation outside this window may cause unreliable writes or data corruption, and the device is not characterized for voltages below 2.5V.
Does the 24LC02BT-I/OT support 1 MHz I²C communication?
No, the 24LC02BT-I/OT does not support 1 MHz I²C. Its maximum clock frequency is 400 kHz at VCC ≥ 2.5V. The 24FC02 variant supports 1 MHz, but the 24LC02BT-I/OT is specifically rated for 400 kHz only-exceeding this limit violates AC timing specifications and risks data loss or bus lockup.
How is write protection implemented on the 24LC02BT-I/OT?
Write protection on the 24LC02BT-I/OT is controlled by the WP pin: tying it to VCC disables all write operations (including page and byte writes) across the full 256-byte memory array, while reads remain fully functional. Tying WP to VSS enables normal read/write access. No internal register programming is required-protection is purely hardware-based and immediate.
What package type is used for the 24LC02BT-I/OT?
The 24LC02BT-I/OT uses a 5-lead SOT-23 (also labeled SC-70) package with wettable flanks, measuring 2.2 mm × 1.35 mm × 1.0 mm. Pin 1 is SCL, pin 2 is VSS, pin 3 is SDA, pin 4 is WP, and pin 5 is VCC. This compact footprint supports high-density PCB layouts and automated optical inspection.
Can the 24LC02BT-I/OT be used in automotive applications?
The 24LC02BT-I/OT is rated for industrial temperature (–40°C to +85°C) and is not AEC-Q100 qualified. While some 24LC02B variants (e.g., 24LC02BT-E/OT) carry AEC-Q100 Grade 2 qualification, the -I/OT suffix indicates industrial grade only. For automotive use, select the -E/OT or explicitly AEC-Q100–certified version of the 24LC02B family.
24LC02BT-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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24LC02BT-I/OT FAQ
1.How can I place an order for 24LC02BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC02BT-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 24LC02BT-I/OT reliable?
The price and inventory of 24LC02BT-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 24LC02BT-I/OT is usually 5 days.
3.What payment methods are accepted for 24LC02BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC02BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC02BT-I/OT?
24LC02BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC02BT-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 24LC02BT-I/OT?
For technical support, including 24LC02BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC02BT-I/OT requirements.
6.How does Aetrix verify that 24LC02BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 24LC02BT-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 24LC02BT-I/OT meets industry standards.
7.What is the process for return or replacement of 24LC02BT-I/OT?
All 24LC02BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC02BT-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 24LC02BT-I/OT part is unused and in its original packaging.
Return procedure for 24LC02BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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