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Microchip Technology 24LC02BH-I/ST
- Part No.:
- 24LC02BH-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC02BH-I/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,323
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Product details
Overview
24LC02BH-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). It operates from 2.5V to 5.5V, supports up to 400 kHz clock frequency, and delivers ≤1 mA read current and ≤1 µA standby current over –40°C to +85°C. It is used in embedded systems for storing calibration data, configuration settings, and device identifiers.
For engineers reviewing the 24LC02BH-I/ST datasheet, 24LC02BH-I/ST pinout, 24LC02BH-I/ST application, or 24LC02BH-I/ST equivalent, key selection criteria include its half-array write-protection capability, 8-byte page buffer, Schmitt-trigger inputs for noise immunity, self-timed 5 ms write cycle, and AEC-Q100 qualification for automotive use.
Technical Context
The 24LC02BH-I/ST implements a two-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit control. Its internal architecture includes an Address Pointer that auto-increments during sequential reads/writes and a dedicated 8-byte page buffer enabling burst writes within physical page boundaries (0–7, 8–15, etc.).
Write protection is implemented via the WP pin: tied to VCC, it disables writes to addresses 80h–FFh while permitting full read access; tied to VSS, full read/write operation is enabled. The device uses Schmitt-trigger inputs on SDA/SCL and input filtering (50 ns spike suppression) to ensure robust operation on noisy buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for firmware revision logs or sensor calibration tables |
| VCC Range | 2.5V–5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| Max Clock Frequency | 400 kHz - enables fast configuration loading in real-time systems |
| Page Write Buffer | 8 bytes - reduces I²C transaction count when updating multi-byte parameters |
| Write Cycle Time | 5 ms max - deterministic erase/write timing simplifies host polling and timeout design |
| Data Retention | >200 years - ensures long-term reliability in unpowered storage applications |
| Endurance | 1 million erase/write cycles - supports frequent field updates in industrial controllers |
Pinout & Package
24LC02BH-I/ST is supplied in an 8-lead SOIC package (SN) with standard 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Address Input (NC) | No internal connection - may be left floating or tied to VSS/VCC without affecting function |
| VSS | Ground Reference | Return path for all internal circuitry; must be low-impedance for stable I²C signaling |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ @ 400 kHz) |
| SCL | Serial Clock Input | Master-generated clock synchronizing all data transfers; Schmitt-triggered for noise immunity |
| WP | Write-Protect Control | Logic-high enables half-array (80h–FFh) write inhibition; critical for safeguarding boot code or security keys |
| VCC | Power Supply | Primary supply rail; decoupling capacitor (0.1 µF) recommended near pin for transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write-Protect | Physically blocks writes to upper 128 bytes (80h–FFh) when WP = VCC - prevents accidental corruption of critical firmware metadata |
| Schmitt Trigger Inputs | 50 mV hysteresis on SDA/SCL - rejects sub-50 ns noise spikes common in motor-driven or switching-power environments |
| Page Write Capability | Accepts up to 8 bytes per STOP condition - cuts I²C overhead by 87.5% vs. byte-write for contiguous parameter sets |
| AEC-Q100 Qualified | Qualified for automotive Grade 2 (–40°C to +105°C ambient) - validated for under-hood and infotainment subsystems |
| ESD Protection | >4 kV HBM - withstands handling and board-level ESD events without latch-up or parametric shift |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients and runtime compensation values for temperature/humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at power-up and during field recalibration via I²C. Use Value: Enables plug-and-play sensor replacement without manual reprogramming; 200-year retention guarantees calibration integrity across product lifetime. | Use Scenario: Holding door lock actuator profiles, mirror position presets, and seat memory maps in entry-level vehicles. IC Role / Device Role / Timing Role: Secure parameter vault with hardware write-protect guarding safety-critical defaults. Use Value: WP pin tied to VCC prevents firmware update routines from overwriting factory-set fail-safe positions during OTA updates. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Recording dose history, alarm thresholds, and user-defined therapy modes in battery-backed portable devices. IC Role / Device Role / Timing Role: Low-power persistent log storage interfaced to MCU via 100 kHz I²C during sleep mode. Use Value: 1 µA standby current extends battery life; 1M-cycle endurance supports daily logging for >27 years. | Use Scenario: Storing tariff schedules, meter ID, CT/PT ratios, and tamper-event timestamps in utility-grade meters. IC Role / Device Role / Timing Role: Tamper-resistant configuration register bank with write-lock for regulatory compliance fields. Use Value: Half-array protection isolates immutable utility parameters (80h–FFh) from field-updatable billing logic (00h–7Fh). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C02D-SSHM-T | Same 2 Kbit capacity, 1.7–5.5V VCC, but supports 1 MHz I²C; no built-in half-array write-protect | Lacks hardware WP pin - requires software-based protection or external logic for secure regions | Choose when higher-speed communication is required and write protection can be managed in firmware. |
| BR24G02NUX-10 | 2 Kbit, 1.6–5.5V, supports 1 MHz I²C; write-protect covers entire array only (no half-array option) | Global WP only - cannot isolate critical vs. volatile data segments within same device | Prefer when full-memory lock-down suffices and ultra-low 1.6V operation is needed for energy-harvesting designs. |
Compared with AT24C02D-SSHM-T and BR24G02NUX-10, the 24LC02BH-I/ST uniquely provides hardware-enforced partial write protection (80h–FFh), making it optimal for systems where firmware metadata must remain immutable while application data remains field-updatable - a distinction not achievable with full-array or software-only protection schemes.
Availability
24LC02BH-I/ST is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for 24LC02BH-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.
The 24LC02BH belongs to Microchip's 24XX02H family of I²C EEPROMs, designed specifically for reliable, low-power nonvolatile storage in automotive, industrial, and medical applications demanding AEC-Q100 qualification and extended data retention.
FAQ
What is the maximum clock frequency supported by the 24LC02BH-I/ST?
The 24LC02BH-I/ST supports up to 400 kHz I²C clock frequency when VCC ≥ 2.5V. At voltages below 2.5V, the maximum clock rate drops to 100 kHz per datasheet DS20002105B. This dual-speed capability allows flexible integration across both 3.3V and legacy 5V systems while maintaining signal integrity.
How does the write-protect feature work on the 24LC02BH-I/ST?
The WP pin on the 24LC02BH-I/ST enables hardware-based write protection: when tied to VCC, writes to memory addresses 80h–FFh are inhibited while reads remain fully functional; when tied to VSS, full read/write access is granted. This allows secure segregation of immutable firmware metadata from field-updatable parameters without software overhead.
Is the 24LC02BH-I/ST pin-compatible with other 24XX02H-series EEPROMs?
Yes - the 24LC02BH-I/ST shares identical pinout, package dimensions, and electrical interface with all 24XX02H variants (e.g., 24AA02H, 24LC02B) in the same package type (e.g., SOIC-8). However, voltage range differs: 24LC02BH-I/ST requires ≥2.5V, whereas 24AA02H operates down to 1.7V.
What is the purpose of the A0, A1, and A2 pins on the 24LC02BH-I/ST?
The A0, A1, and A2 pins on the 24LC02BH-I/ST are not internally connected and serve no functional role. They may be left floating or tied to VSS or VCC without affecting device operation - a design choice that simplifies PCB layout and eliminates address conflict concerns in single-device I²C configurations.
Does the 24LC02BH-I/ST require external pull-up resistors on SDA and SCL lines?
Yes - the 24LC02BH-I/ST has open-drain SDA and SCL outputs and requires external pull-up resistors. For 400 kHz operation, a 2 kΩ resistor to VCC is recommended; for 100 kHz, 10 kΩ is typical. Proper pull-up strength ensures valid logic levels and meets rise-time specifications (≤300 ns at VCC ≥ 2.5V).
24LC02BH-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
24LC02BH-I/ST FAQ
1.How can I place an order for 24LC02BH-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC02BH-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 24LC02BH-I/ST reliable?
The price and inventory of 24LC02BH-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 24LC02BH-I/ST is usually 5 days.
3.What payment methods are accepted for 24LC02BH-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC02BH-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC02BH-I/ST?
24LC02BH-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC02BH-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 24LC02BH-I/ST?
For technical support, including 24LC02BH-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC02BH-I/ST requirements.
6.How does Aetrix verify that 24LC02BH-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC02BH-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 24LC02BH-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC02BH-I/ST?
All 24LC02BH-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC02BH-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 24LC02BH-I/ST part is unused and in its original packaging.
Return procedure for 24LC02BH-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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