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Microchip Technology 24LC02BH-E/SN
- Part No.:
- 24LC02BH-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC02BH-E/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,988
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Product details
Overview
24LC02BH-E/SN 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 +125°C. It is used in embedded systems for storing calibration data, configuration parameters, and device identifiers.
For engineers reviewing the 24LC02BH-E/SN datasheet, 24LC02BH-E/SN pinout, 24LC02BH-E/SN application, or 24LC02BH-E/SN equivalent, key selection considerations include its extended temperature range (–40°C to +125°C), half-array write-protection via WP pin, 8-byte page write buffer, Schmitt-trigger inputs for noise immunity, and compatibility with standard I²C bus timing at both 100 kHz and 400 kHz.
Technical Context
The 24LC02BH-E/SN implements a two-wire I²C interface with open-drain SDA/SCL pins requiring external pull-ups. Its internal address pointer enables current-address, random, and sequential read modes. Write operations are self-timed with a maximum 5 ms byte/page cycle time and support acknowledge polling for bus efficiency.
It features Schmitt-trigger inputs on SDA and SCL with ≥50 ns spike suppression and hysteresis of 0.05 × VCC, ensuring robust operation on noisy buses. The WP pin provides hardware-level protection: tied to VCC, it disables writes to addresses 80h–FFh while allowing full read access across the entire 256-byte array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) - sufficient for firmware revision stamps, MAC address storage, or sensor calibration coefficients in compact designs. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting. |
| Max Clock Frequency | 400 kHz (≥2.5V) - enables faster configuration loading than legacy 100 kHz EEPROMs, reducing boot-time latency. |
| Write Cycle Time | ≤5 ms (byte or page) - deterministic erase/write timing simplifies host firmware timeout handling. |
| Endurance & Retention | 1 million erase/write cycles; >200 years data retention - suitable for field-updatable systems with infrequent but critical parameter changes. |
| Temperature Range | –40°C to +125°C (Extended grade) - qualified for under-hood automotive, industrial motor control, and outdoor IoT node applications. |
| ESD Protection | >4,000 V HBM - reduces need for external ESD protection components on I²C lines in harsh environments. |
Pinout & Package
24LC02BH-E/SN is packaged in an 8-lead narrow SOIC (SN) with 1.27 mm pitch, 3.90 mm body width, and JEDEC-standard footprint. Pin 1 is marked with a beveled corner or dot; the package is RoHS-compliant and AEC-Q100 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Device Address Inputs | No internal connection - may be left floating or tied to VSS/VCC without affecting operation; simplifies PCB layout and eliminates address conflict risk. |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be low-impedance to ensure stable I²C signaling and noise immunity. |
| SDA | Serial Data I/O | Bidirectional open-drain line - requires external pull-up (2 kΩ typical for 400 kHz); carries address, command, and data during I²C transactions. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all data transfers; Schmitt-trigger input rejects noise spikes up to 50 ns. |
| WP | Write-Protect Control | Active-high enable: tied to VCC blocks writes to upper 128 bytes (80h–FFh); tied to VSS enables full memory access. |
| VCC | Power Supply | Single 2.5–5.5V supply powers EEPROM core and I/O buffers; no separate logic or analog rail required. |
Key Features
| Feature | Design Value |
|---|---|
| Half-Array Hardware Write-Protect | WP pin physically disables writes to 80h–FFh - prevents accidental corruption of critical firmware or security keys without software overhead. |
| 8-Byte Page Write Buffer | Enables burst programming of up to 8 contiguous bytes per Stop condition - cuts write time by ~75% vs. individual byte writes. |
| Schmitt Trigger + Input Filtering | Combined 0.05×VCC hysteresis and 50 ns spike suppression - eliminates need for external RC filters on SDA/SCL in electrically noisy environments. |
| Self-Timed Erase/Write Cycle | No external timing components or host-controlled delays needed - simplifies firmware integration and guarantees consistent 5 ms max write duration. |
| AEC-Q100 Qualified (Grade 1) | Validated for automotive applications including body control modules and ADAS sensors - meets stress test requirements for temperature cycling, HTOL, and ESD. |
Applications
| Automotive Body Control Module | Industrial Sensor Node |
|---|---|
Use Scenario: Storing seat position presets, mirror calibration offsets, and door lock configuration in a vehicle body controller. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed data integrity across ignition cycles and thermal extremes. Use Value: WP pin protects factory-set calibration data (80h–FFh) from overwrite during dealer reprogramming of user preferences (00h–7Fh). | Use Scenario: Recording sensor calibration coefficients, firmware version ID, and last-known fault codes in a wireless temperature/humidity node. IC Role / Device Role / Timing Role: Low-power, I²C-accessible memory supporting infrequent writes and long-term retention in battery-operated edge devices. Use Value: 1 µA standby current extends 10-year battery life; 400 kHz interface allows fast parameter updates during brief wake-up windows. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Archiving dose history, alarm thresholds, and user-defined therapy profiles in Class II medical equipment. IC Role / Device Role / Timing Role: Safety-critical nonvolatile storage with write-protection for regulatory-mandated audit logs. Use Value: AEC-Q100 qualification and >200-year data retention meet IEC 62304 traceability and longevity requirements. | Use Scenario: Storing tariff schedules, metering constants, and tamper-event timestamps in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure, high-endurance memory interfacing directly with metrology SoC over I²C. Use Value: 1 million write cycles withstand daily billing updates for >27 years; ESD >4 kV survives field installation surges. |
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 rated only to +85°C (Industrial grade); no AEC-Q100 qualification. | Lacks extended temperature and automotive qualification - unsuitable for under-hood or high-reliability industrial deployments. | Select when cost sensitivity outweighs extended temp/AEC-Q100 needs and ambient stays ≤85°C. |
| BR24G02-3MNUC | 2 Kbit, 1.6–5.5V, supports 1 MHz I²C; built-in write-protect register (software-configurable), not hardware WP pin. | Software-based protection requires MCU coordination; lacks direct hardware lockout for critical upper memory region. | Choose for higher-speed bus operation and flexible protection schemes where MCU firmware can manage access control. |
Compared with AT24C02D-SSHM-T and BR24G02-3MNUC, the 24LC02BH-E/SN uniquely combines extended temperature operation, AEC-Q100 qualification, and dedicated hardware write-protect for the upper memory block - making it the preferred choice for automotive and mission-critical industrial applications demanding physical-level data integrity.
Availability
24LC02BH-E/SN is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24LC02BH-E/SN 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, FPGA, and memory solutions, serving automotive, industrial, consumer, and communications markets with vertically integrated silicon and development tools.
The 24LC02BH belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained and thermally demanding applications - emphasizing hardware write protection, noise immunity, and automotive-grade reliability.
FAQ
What is the maximum clock frequency supported by the 24LC02BH-E/SN?
The 24LC02BH-E/SN supports up to 400 kHz I²C clock frequency when VCC is ≥2.5V. At voltages below 2.5V, the maximum clock rate drops to 100 kHz. This dual-speed capability ensures interoperability with legacy 100 kHz systems while enabling faster configuration loads in modern 3.3V/5V designs. The 24LC02BH-E/SN does not support frequencies above 400 kHz.
How does the WP pin function on the 24LC02BH-E/SN?
On the 24LC02BH-E/SN, the WP (Write-Protect) pin is a hardware-level control: when tied to VCC, it permanently disables write operations to memory addresses 80h–FFh (upper 128 bytes), while allowing full read access. When tied to VSS, all 256 bytes are writable. This feature is implemented entirely within the 24LC02BH-E/SN die and requires no firmware intervention.
Is the 24LC02BH-E/SN pin-compatible with other Microchip 2 Kbit EEPROMs like the 24AA02H?
Yes, the 24LC02BH-E/SN shares identical pinout, package dimensions, and I²C protocol with the 24AA02H-SN, but differs in voltage range (2.5–5.5V vs. 1.7–5.5V) and temperature grade (–40°C to +125°C vs. –40°C to +85°C). Both use the same SOIC-8 (SN) footprint and pin assignments, enabling drop-in replacement where extended temperature and higher minimum VCC are acceptable.
What is the endurance rating of the 24LC02BH-E/SN?
The 24LC02BH-E/SN is rated for more than 1 million erase/write cycles at 25°C and 5.5V, with data retention exceeding 200 years. This endurance is validated through characterization (not 100% tested per unit) and applies to both byte and page write modes. Real-world wear leveling is unnecessary due to the high cycle count relative to typical field usage.
Does the 24LC02BH-E/SN require external pull-up resistors on SDA and SCL?
Yes, the 24LC02BH-E/SN requires external pull-up resistors on both SDA and SCL lines because these pins are open-drain. For 400 kHz operation, a 2 kΩ pull-up to VCC is recommended; for 100 kHz, 10 kΩ is typical. Pull-up values must be selected based on bus capacitance and rise-time requirements - the 24LC02BH-E/SN itself does not integrate internal pull-ups.
24LC02BH-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC02BH-E/SN FAQ
1.How can I place an order for 24LC02BH-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC02BH-E/SN 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-E/SN reliable?
The price and inventory of 24LC02BH-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC02BH-E/SN is usually 5 days.
3.What payment methods are accepted for 24LC02BH-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC02BH-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC02BH-E/SN?
24LC02BH-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC02BH-E/SN 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-E/SN?
For technical support, including 24LC02BH-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC02BH-E/SN requirements.
6.How does Aetrix verify that 24LC02BH-E/SN is sourced from the original manufacturer or authorized distributors?
All 24LC02BH-E/SN 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-E/SN meets industry standards.
7.What is the process for return or replacement of 24LC02BH-E/SN?
All 24LC02BH-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC02BH-E/SN, 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-E/SN part is unused and in its original packaging.
Return procedure for 24LC02BH-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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