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Microchip Technology 24LC02BT-I/ST
- Part No.:
- 24LC02BT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC02BT-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:860
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Product details
Overview
24LC02BT-I/ST from Microchip Technology is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protection, 8-byte page buffer, and operation from 2.5V to 5.5V. It supports 400 kHz clock frequency, delivers ≤1 mA read current and ≤1 µA standby current (I-temp), and is qualified for industrial temperature range (–40°C to +85°C). It is used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the 24LC02BT-I/ST datasheet, 24LC02BT-I/ST pinout, 24LC02BT-I/ST application, or 24LC02BT-I/ST equivalent, key selection considerations include VCC voltage compliance (2.5–5.5V), I²C timing at 400 kHz, WP pin functionality for hardware-level write protection, and SOIC-8 package compatibility with standard PCB footprints.
Technical Context
The 24LC02BT-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 architecture includes an 8-byte page write buffer, self-timed erase/write cycle, and address pointer logic enabling current-address, random, and sequential read modes.
It uses open-drain SDA/SCL signaling requiring external pull-up resistors (e.g., 2 kΩ for 400 kHz), supports ACK polling to detect write completion, and enforces strict bus protocol adherence-including Start/Stop condition generation, data validity windows, and hold/setup timing per I²C specification across its rated voltage and temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) - sufficient for device ID, calibration coefficients, or small configuration tables. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic systems; not operable below 2.5V. |
| Max Clock Frequency | 400 kHz - supports medium-speed I²C communication without requiring high-frequency layout controls. |
| Page Write Buffer | 8 bytes - enables efficient burst writes within a single physical page boundary (0x00–0x07, 0x08–0x0F, etc.). |
| Write Cycle Time | 5 ms maximum - defines minimum inter-write interval; impacts real-time logging latency. |
| Endurance | 1 million erase/write cycles - ensures long-term reliability in field-updatable applications. |
| Data Retention | 200 years - guarantees nonvolatile storage integrity over product lifetime without refresh. |
| Temperature Range | –40°C to +85°C (Industrial) - validated for use in automotive ECUs, industrial controllers, and outdoor IoT nodes. |
Pinout & Package
24LC02BT-I/ST is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, 3.90 mm body width, and wettable flanks for automated optical inspection (AOI). Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection; may be left floating or tied to VSS/VCC without affecting operation. |
| A1 | Address Input | No internal connection; unused in 2-Kbit variant; no impact on I²C address (fixed to 1010xxx). |
| A2 | Address Input | No internal connection; identical behavior to A0/A1; no address selection capability. |
| VSS | Ground | Reference return path for all internal circuitry and I/O signals; must be low-impedance. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; carries address, data, and ACK/NACK. |
| SCL | Serial Clock Input | Input-only; synchronizes all data transfers; host-generated; edge-sensitive timing critical. |
| WP | Write-Protect Control | Active-high enable: tied to VCC blocks all writes; tied to VSS enables full read/write access. |
| VCC | Power Supply | Primary supply rail; must be stable within 2.5–5.5V; decoupling capacitor recommended near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt Trigger Inputs | Provides 0.05×VCC hysteresis on SDA/SCL, rejecting noise spikes up to 50 ns and ensuring robust operation on noisy PCBs. |
| Output Slope Control | Controls SDA/SCL rise/fall edges to limit ground bounce, eliminating signal integrity issues in dense mixed-signal layouts. |
| Hardware Write-Protection | WP pin directly disables all write operations when pulled high, providing tamper-resistant configuration lock without software overhead. |
| I²C Bus Compatibility | Fully compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C protocols, including Start/Stop, ACK polling, and addressing. |
| Low-Power Operation | 1 µA max standby current at I-temp enables battery-powered devices to retain settings for years without significant drain. |
Applications
| Embedded System Configuration Storage | Sensor Calibration Data Retention |
|---|---|
Use Scenario: Storing boot-time configuration parameters (e.g., display brightness, network timeout, default language) in microcontroller-based appliances. IC Role / Device Role / Timing Role: Nonvolatile memory client on I²C bus; responds to host-initiated reads/writes with fixed 1010xxx address and ACK/NACK handshaking. Use Value: Enables field-upgradable settings without firmware reflash; 256-byte capacity accommodates 20+ configurable parameters with checksums. | Use Scenario: Holding factory-trimmed offset/gain coefficients for analog sensors (e.g., temperature, pressure) in industrial monitoring nodes. IC Role / Device Role / Timing Role: Calibration data repository accessed during power-on initialization; write-protected after calibration via WP pin. Use Value: Eliminates need for recalibration in field; hardware WP prevents accidental overwrite during sensor self-test routines. |
| Firmware Parameter Backup | Automotive ECU Settings Storage |
Use Scenario: Backing up runtime-modified firmware parameters (e.g., motor PID gains, fault thresholds) before shutdown in motor control systems. IC Role / Device Role / Timing Role: I²C slave storing volatile parameter snapshots; supports sequential reads for bulk restore and page writes for efficient save. Use Value: Ensures consistent behavior across power cycles; 8-byte page buffer reduces I²C transaction count by up to 8× versus byte writes. | Use Scenario: Storing vehicle-specific settings (e.g., seat position memory, mirror fold/unfold logic) in body control modules (BCMs). IC Role / Device Role / Timing Role: AEC-Q100 qualified EEPROM interfacing with MCU over I²C; operates reliably across –40°C to +85°C ambient. Use Value: Meets automotive reliability requirements; 1M endurance supports >10 years of daily user adjustments under worst-case usage. |
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/ST | Wider VCC range (1.7–5.5V); same 400 kHz max clock; identical SOIC-8 package and pinout. | Supports 1.8V/2.5V/3.3V/5V systems; suitable where main supply drops below 2.5V during brown-out. | Select when operating below 2.5V is required; otherwise 24LC02BT-I/ST offers tighter VCC spec and lower cost. |
| AT24C02D-SSHM-T | Same 2-Kbit size, SOIC-8, and I²C interface; rated for 1 MHz clock; higher 3.5 mA max ICCWRITE. | Enables faster writes in high-throughput logging; less suitable for ultra-low-power sleep states due to higher leakage. | Choose for speed-critical data capture; avoid if standby current <1 µA is mandatory for battery life. |
Compared with 24AA02T-I/ST, the 24LC02BT-I/ST trades wider voltage flexibility for guaranteed 2.5V+ operation and lower active current; versus AT24C02D-SSHM-T, it prioritizes ultra-low standby power over maximum clock speed-making it optimal for energy-constrained industrial and automotive applications.
Availability
24LC02BT-I/ST is available at Aetrix Electronics and suitable for embedded system configuration storage, sensor calibration data retention, and automotive ECU settings storage requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for 24LC02BT-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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC02B family is designed for reliable, low-power nonvolatile data storage in space-constrained embedded systems where I²C interface simplicity, hardware write protection, and industrial temperature resilience are essential.
FAQ
What is the exact I²C address of the 24LC02BT-I/ST?
The 24LC02BT-I/ST has a fixed 7-bit I²C address of 0b1010xxx, where the three least-significant bits (xxx) are "don't care" and unused. This results in a single hardwired address of 0x50 for write operations (0b1010000) and 0x51 for read (0b1010001). Pins A0–A2 have no internal connection and do not affect addressing.
Does the 24LC02BT-I/ST support 1 MHz I²C operation?
No, the 24LC02BT-I/ST is rated for a maximum clock frequency of 400 kHz across its specified VCC range (2.5V–5.5V). For 1 MHz operation, Microchip's 24FC02 family is required. Attempting 1 MHz communication with the 24LC02BT-I/ST will result in timing violations and unreliable data transfer.
How does the WP pin function on the 24LC02BT-I/ST?
The WP (Write-Protect) pin on the 24LC02BT-I/ST is an active-high input. When tied to VCC, it disables all write operations-including byte and page writes-while permitting unlimited reads. When tied to VSS (or left floating, though not recommended), full read/write access is enabled. This provides hardware-level security against accidental or malicious firmware corruption.
What is the page write boundary for the 24LC02BT-I/ST?
The 24LC02BT-I/ST has an 8-byte page write buffer, and physical page boundaries align to integer multiples of 8 addresses: 0x00–0x07, 0x08–0x0F, ..., 0xF8–0xFF. Writing across a boundary (e.g., starting at 0x07 with 8 bytes) causes wraparound to the start of the same page, overwriting prior data. Application firmware must enforce alignment to prevent unintended data loss.
Is the 24LC02BT-I/ST RoHS compliant and AEC-Q100 qualified?
Yes, the 24LC02BT-I/ST is RoHS compliant and AEC-Q100 qualified for Grade 2 (–40°C to +105°C ambient) and Grade 3 (–40°C to +125°C ambient) stress testing. Its qualification covers thermal cycling, humidity bias, and ESD performance, confirming suitability for automotive body electronics and industrial control environments.
24LC02BT-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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC02BT-I/ST FAQ
1.How can I place an order for 24LC02BT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC02BT-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 24LC02BT-I/ST reliable?
The price and inventory of 24LC02BT-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 24LC02BT-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC02BT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC02BT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC02BT-I/ST?
24LC02BT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC02BT-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 24LC02BT-I/ST?
For technical support, including 24LC02BT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC02BT-I/ST requirements.
6.How does Aetrix verify that 24LC02BT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC02BT-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 24LC02BT-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC02BT-I/ST?
All 24LC02BT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC02BT-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 24LC02BT-I/ST part is unused and in its original packaging.
Return procedure for 24LC02BT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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