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Microchip Technology 24LC02BHT-I/ST
- Part No.:
- 24LC02BHT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC02BHT-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,257
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Product details
Overview
24LC02BHT-I/ST from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protect for the upper half-array (80h–FFh), 400 kHz max clock frequency at VCC ≥ 2.5 V, and industrial temperature range (–40°C to +85°C). It operates down to 2.5 V, supports 8-byte page writes with ≤5 ms self-timed erase/write cycle, and is packaged in an 8-lead SOIC (ST) with matte tin leads.
For engineers reviewing the 24LC02BHT-I/ST datasheet, 24LC02BHT-I/ST pinout, 24LC02BHT-I/ST application, or 24LC02BHT-I/ST equivalent, this page delivers verified electrical specs, validated pin functions, confirmed package dimensions, and real-world use cases for embedded system configuration storage, calibration data retention, and secure device identity management.
Technical Context
The 24LC02BHT-I/ST implements a two-wire I²C interface with Schmitt-trigger inputs on SDA and SCL for noise immunity, output slope control to suppress ground bounce, and programmable write protection via the WP pin. Its internal address pointer enables current-address, random, and sequential read modes without external address latching.
It uses low-power CMOS technology with ≤1 mA active read current and ≤1 µA standby current (I-temp), supports acknowledge polling to detect write completion, and features built-in ESD protection (>4 kV) and >1 million endurance cycles with >200 years data retention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for firmware revision stamps, sensor calibration coefficients, or MAC address storage |
| VCC Range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic systems without level shifting |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5 V - enables faster configuration loading vs. legacy 100 kHz EEPROMs |
| Page Write Buffer | 8 bytes - reduces I²C transaction count when updating multi-byte parameters |
| Write Protection | Hardware-enabled half-array (80h–FFh) write-protect via WP pin tied to VCC - prevents accidental overwrites of critical firmware metadata |
| Data Retention | >200 years at 85°C - ensures long-term reliability in unattended industrial deployments |
| Endurance | >1,000,000 erase/write cycles - supports frequent recalibration in test equipment or field-upgradable devices |
Pinout & Package
8-Lead SOIC (ST) package per Microchip Drawing C04-057-SN Rev F: 3.90 mm body width, 1.27 mm pitch, matte tin (Sn) finish, RoHS compliant. Pin 1 marked by notch or bevel; exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Device Address Input | No internal connection - may be left floating or tied to VSS/VCC; does not affect addressing for 24LC02BH family |
| A1 | Device Address Input | No internal connection - same as A0; no impact on I²C client address (fixed '1010') |
| A2 | Device Address Input | No internal connection - all three address pins are unused; device responds only to 4-bit control code '1010' |
| VSS | Ground Reference | System return path for I²C bus and internal logic; must be low-impedance for stable noise suppression |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ for 400 kHz); carries address, data, and ACK/NACK signals |
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transfers; Schmitt trigger input rejects noise spikes up to 50 ns |
| WP | Write-Protect Control | Active-high enable: tied to VCC locks addresses 80h–FFh; tied to VSS enables full-array write access |
| VCC | Power Supply | Primary supply for EEPROM core and I/O buffers; must remain stable during write cycles to prevent corruption |
Key Features
| Feature | Design Value |
|---|---|
| Half-Array Hardware Write-Protect | Prevents firmware corruption by locking critical upper memory block (80h–FFh) without software overhead |
| 8-Byte Page Write Buffer | Reduces I²C bus occupancy by up to 8× vs. byte-write for multi-parameter updates (e.g., sensor calibration sets) |
| Schmitt Trigger Inputs (SDA/SCL) | Eliminates need for external RC filters on noisy industrial PCBs while maintaining timing compliance |
| Self-Timed Write Cycle (≤5 ms) | Removes requirement for host-side delay timers; enables deterministic firmware flow with ACK polling |
| 1 µA Standby Current (I-temp) | Extends battery life in portable medical devices or IoT edge nodes operating in deep sleep mode |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in PLC modules. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed at power-on reset via I²C; WP pin hardwired to VSS during calibration, then to VCC for field operation. Use Value: Eliminates recalibration labor and ensures traceable metrology across product lifetime using >200-year data retention. | Use Scenario: Holding user-configurable settings (baud rate, network ID, alarm thresholds) in HVAC controllers. IC Role / Device Role / Timing Role: I²C slave storing persistent configuration updated only on menu save; accessed during boot and runtime reads. Use Value: Enables field reconfiguration without firmware reflashing; 8-byte page writes reduce UI latency during multi-field saves. |
| Secure Device Identity Storage | Medical Device Usage Log |
Use Scenario: Storing unique MAC address, serial number, and cryptographic keys in networked diagnostic equipment. IC Role / Device Role / Timing Role: Read-only memory block (80h–FFh) write-protected via WP=VCC; lower block (00h–7Fh) used for operational logs. Use Value: Prevents tampering with regulatory-mandated identifiers while allowing field-updatable service records. | Use Scenario: Recording procedure timestamps, error codes, and maintenance events in portable ultrasound units. IC Role / Device Role / Timing Role: Circular log buffer written sequentially via current-address reads; WP pin grounded to permit full-array updates. Use Value: Supports FDA audit trails with >1M endurance cycles and guaranteed data integrity under battery-backed operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC02BT-I/ST | Same die, identical electrical specs and pinout; differs only in tape-and-reel packaging (T vs. H suffix) | No functional difference; suitable for automated SMT assembly where reel format required | Select 24LC02BT-I/ST for high-volume pick-and-place; 24LC02BHT-I/ST for tube-based prototyping or low-volume builds |
| AT24C02D-SSHM-T | 2 Kbit I²C EEPROM with 1.7–5.5 V VCC, 1 MHz max clock, but no hardware write-protect pin | Lacks dedicated WP pin - requires software-based protection or external logic for half-array lock | Choose AT24C02D-SSHM-T only if higher speed (1 MHz) is critical and write-protection can be implemented in firmware |
Compared with 24LC02BT-I/ST, the 24LC02BHT-I/ST offers identical functionality in tube packaging for flexibility in small-batch production; versus AT24C02D-SSHM-T, it provides hardware-enforced write protection essential for safety-critical medical or industrial identity storage.
Availability
24LC02BHT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and medical device usage logging requiring stable component supply across extended product lifecycles.
Supply support for 24LC02BHT-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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The 24LC02BH family was designed for reliable, low-power configuration and identity storage in space-constrained embedded systems where I²C bus simplicity and hardware write security are mandatory.
FAQ
What is the maximum I²C clock frequency supported by the 24LC02BHT-I/ST?
The 24LC02BHT-I/ST supports up to 400 kHz I²C clock frequency when VCC is 2.5 V or higher. At VCC < 2.5 V, the maximum clock drops to 100 kHz per Microchip DS20002105B. This dual-speed capability allows interoperability with both legacy and modern I²C masters without protocol changes. The 24LC02BHT-I/ST maintains full timing compliance across its specified industrial temperature range (–40°C to +85°C).
How does the WP pin function on the 24LC02BHT-I/ST?
The WP (Write-Protect) pin on the 24LC02BHT-I/ST enables hardware-level memory protection: when tied to VCC, it locks the upper half of memory (addresses 80h–FFh) against write operations while permitting full read access; when tied to VSS, all 256 bytes are writable. This feature is implemented entirely within the 24LC02BHT-I/ST silicon and requires no firmware intervention, making it ideal for safeguarding immutable device identifiers or calibration data.
Can the 24LC02BHT-I/ST operate from a 3.3 V supply?
Yes, the 24LC02BHT-I/ST operates reliably from a 3.3 V supply, which falls within its specified VCC range of 2.5 V to 5.5 V. At 3.3 V, it supports the full 400 kHz I²C speed, draws ≤1 mA during read operations, and maintains ≤1 µA standby current. Its Schmitt-trigger inputs ensure robust noise immunity on mixed-voltage boards, and the 24LC02BHT-I/ST's 8-lead SOIC package is compatible with standard 3.3 V PCB layout practices.
What is the endurance rating of the 24LC02BHT-I/ST?
The 24LC02BHT-I/ST is rated for more than 1,000,000 erase/write cycles at 25°C and 5.5 V, as characterized by Microchip. This endurance is maintained across its industrial temperature range (–40°C to +85°C), enabling frequent updates in applications like test equipment calibration logs or field-serviceable device configuration. Each write cycle is self-timed (≤5 ms), and the 24LC02BHT-I/ST supports ACK polling to confirm completion before initiating subsequent operations.
Is the 24LC02BHT-I/ST RoHS compliant and AEC-Q100 qualified?
The 24LC02BHT-I/ST is RoHS compliant per Microchip documentation and meets AEC-Q100 Grade 2 qualification (–40°C to +105°C ambient), though its specified industrial temperature range is –40°C to +85°C. This dual qualification confirms suitability for automotive subsystems requiring enhanced reliability, including infotainment configuration storage and ADAS sensor calibration memory. The 24LC02BHT-I/ST's 8-lead SOIC package uses matte tin (Sn) terminations, fully compliant with lead-free soldering processes.
24LC02BHT-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:
- Not 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
24LC02BHT-I/ST FAQ
1.How can I place an order for 24LC02BHT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC02BHT-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 24LC02BHT-I/ST reliable?
The price and inventory of 24LC02BHT-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 24LC02BHT-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC02BHT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC02BHT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC02BHT-I/ST?
24LC02BHT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC02BHT-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 24LC02BHT-I/ST?
For technical support, including 24LC02BHT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC02BHT-I/ST requirements.
6.How does Aetrix verify that 24LC02BHT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC02BHT-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 24LC02BHT-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC02BHT-I/ST?
All 24LC02BHT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC02BHT-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 24LC02BHT-I/ST part is unused and in its original packaging.
Return procedure for 24LC02BHT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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