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Microchip Technology 24LC02B-I/SN
- Part No.:
- 24LC02B-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC02B-I/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,976
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Product details
Overview
24LC02B-I/SN 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 operation from 2.5V to 5.5V. It supports page writes (up to 8 bytes), features Schmitt-trigger inputs for noise immunity, and is rated for industrial temperature (-40°C to +85°C). It is commonly used in embedded systems for storing calibration data, configuration settings, and device identifiers.
For engineers reviewing the 24LC02B-I/SN datasheet, 24LC02B-I/SN pinout, 24LC02B-I/SN application, or 24LC02B-I/SN equivalent, key selection criteria include its 2.5V minimum VCC, 400 kHz I²C speed at full voltage, 5 ms max write cycle time, hardware WP pin control, and SOIC-8 package compatibility with legacy board layouts.
Technical Context
The 24LC02B-I/SN implements a two-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit control. Its internal architecture includes an 8-byte page buffer, self-timed erase/write cycles, and an Address Pointer that auto-increments during sequential reads. The device operates as a slave-only node on the bus, requiring host-generated Start/Stop conditions and clock synchronization via SCL.
It uses CMOS technology with Schmitt-trigger inputs and output slope control to suppress ground bounce and bus noise. Write protection is implemented via the dedicated WP pin - tied to VSS for full read/write access or VCC to inhibit all writes while preserving read functionality across the entire 256-byte array.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for small firmware parameters or device-specific configuration tables |
| VCC Range | 2.5V–5.5V - requires stable supply above 2.5V; not compatible with 1.8V logic domains |
| I²C Clock Speed | Max 400 kHz at VCC ≥ 2.5V - supports standard-mode I²C without timing margin compromises |
| 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 - defines minimum interval between write commands; impacts firmware polling or timeout design |
| Data Retention | >200 years - ensures long-term reliability for infrequently updated nonvolatile storage |
| Endurance | 1 million erase/write cycles - suitable for applications with moderate update frequency (e.g., daily logging) |
Pinout & Package
24LC02B-I/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, 3.90 mm wide, with gull-wing leads and standard JEDEC MS-012AC footprint. 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 effect on operation |
| A1 | Address Input | No internal connection; no impact on device addressing or functionality |
| A2 | Address Input | No internal connection; unused in 24LC02B family; does not affect I²C address (fixed 1010xxx) |
| VSS | Ground Reference | System ground return path; must be low-impedance for stable I²C signaling and noise immunity |
| SDA | Serial Data I/O | Open-drain bidirectional bus line; requires external pull-up resistor (2–10 kΩ depending on speed) |
| SCL | Serial Clock Input | Input-only clock line driven by host; synchronizes all data transfers and timing windows |
| WP | Write-Protect Control | Logic-level input: VSS enables full read/write; VCC locks entire memory against writes |
| VCC | Power Supply | Primary power rail; must remain within 2.5V–5.5V during all operations including write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write-Protection | Physical WP pin enables system-level memory lockdown without software intervention or firmware dependency |
| Schmitt Trigger Inputs | Input hysteresis (≥0.05×VCC) rejects sub-50 ns noise spikes on SDA/SCL, improving robustness in electrically noisy environments |
| Page Write Capability | 8-byte buffer reduces I²C transaction overhead by up to 8× versus byte-write mode for contiguous data updates |
| Low Standby Current | ≤1 µA at I-temp ensures minimal battery drain in always-on or energy-sensitive applications |
| I²C Bus Compatibility | Fully compliant with Philips I²C specification - interoperable with standard microcontroller peripherals and bus analyzers |
Applications
| Industrial Sensor Calibration | Consumer Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in programmable temperature or pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization; no real-time timing constraints. Use Value: Enables field-replaceable sensors with pre-loaded calibration data, eliminating per-unit firmware flashing. | Use Scenario: Saving user preferences (volume, display brightness, language) in smart speakers or remote controls. IC Role / Device Role / Timing Role: Low-frequency, infrequent write storage; accessed only on setting change or boot. Use Value: Preserves user experience across power cycles with minimal firmware complexity and zero external components. |
| Medical Device Serial Numbering | Automotive ECU Parameter Storage |
Use Scenario: Recording unique device ID, manufacturing date, and regulatory compliance codes in portable diagnostic tools. IC Role / Device Role / Timing Role: One-time or rare-write identity storage; read at startup for traceability reporting. Use Value: Meets FDA UDI requirements using AEC-Q100 qualified component with >200-year data retention. | Use Scenario: Holding adaptive learning values (e.g., throttle position offsets, idle air control trim) in engine control units. IC Role / Device Role / Timing Role: Infrequent write during vehicle operation; read at each ignition cycle. Use Value: Supports self-learning behavior without requiring reprogramming; withstands under-hood thermal cycling (-40°C to +85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA02-I/SN | Wider VCC range (1.7V–5.5V); supports 100 kHz at 1.7V–2.49V; same pinout and memory map | Enables use in 1.8V systems where 24LC02B-I/SN cannot operate | Select when interfacing with ultra-low-voltage MCUs or battery-powered devices below 2.5V |
| AT24C02D-SSHM-T | Same 2-Kbit capacity, SOIC-8, and I²C interface; rated for -40°C to +125°C; slightly higher standby current (3 µA) | Better suited for extended temperature automotive or industrial deployments beyond 85°C | Choose for high-temperature environments where 24LC02B-I/SN's 85°C upper limit is insufficient |
Compared with 24LC02B-I/SN, 24AA02-I/SN adds 1.7V operation but lacks AEC-Q100 qualification, while AT24C02D-SSHM-T extends temperature range to +125°C but increases standby leakage-making each optimal for distinct voltage or thermal requirements.
Availability
24LC02B-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer device configuration, medical device serialization, and automotive ECU parameter storage requiring stable component supply, long-term data integrity, and RoHS-compliant packaging.
Supply support for 24LC02B-I/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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC02B belongs to Microchip's 24XX02 family of I²C serial EEPROMs, designed specifically for reliable, low-power, pin-efficient nonvolatile storage in space-constrained embedded systems across industrial, automotive, and consumer markets.
FAQ
What is the minimum operating voltage for 24LC02B-I/SN?
The 24LC02B-I/SN requires a minimum VCC of 2.5V. Unlike the 24AA02 variant, it is not rated for operation below this threshold - attempting to power it at 1.8V or lower will result in undefined behavior or failure to respond on the I²C bus. This limitation is defined in the Absolute Maximum Ratings and DC Characteristics tables of the official DS20001709N datasheet.
Does 24LC02B-I/SN support multi-master I²C configurations?
Yes, 24LC02B-I/SN fully supports multi-master I²C bus topologies because it complies with the standard I²C protocol, including arbitration and clock stretching. As a slave-only device, it responds only to its assigned address (1010xxx) and never initiates communication - allowing seamless integration into systems with multiple master controllers sharing the same SDA/SCL lines.
How does the WP pin function on 24LC02B-I/SN?
The WP (Write-Protect) pin on 24LC02B-I/SN is a logic-level control: when tied to VCC, it disables all write operations to the entire 256-byte memory array while permitting unrestricted reads; when tied to VSS (or left floating, though not recommended), full read/write access is enabled. This hardware-based protection operates independently of I²C commands and provides fail-safe memory lockdown.
Can 24LC02B-I/SN be used in automotive applications?
Yes, 24LC02B-I/SN is AEC-Q100 qualified for automotive use and specified for industrial temperature range (-40°C to +85°C), making it suitable for cabin-located ECUs, infotainment modules, and body control units. Its 1 million endurance cycles and >200-year data retention meet automotive reliability standards for parameter storage and calibration data retention over vehicle lifetime.
What is the maximum page write size for 24LC02B-I/SN?
The 24LC02B-I/SN supports a maximum page write size of 8 bytes. Page writes must remain within a single physical page boundary (e.g., addresses 0x00–0x07 or 0x08–0x0F); crossing boundaries causes wraparound within the current page. This constraint requires firmware to align multi-byte writes to 8-byte boundaries or implement split-page logic before issuing the Stop condition.
24LC02B-I/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:
- 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-SOIC
24LC02B-I/SN FAQ
1.How can I place an order for 24LC02B-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC02B-I/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 24LC02B-I/SN reliable?
The price and inventory of 24LC02B-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC02B-I/SN is usually 5 days.
3.What payment methods are accepted for 24LC02B-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC02B-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC02B-I/SN?
24LC02B-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC02B-I/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 24LC02B-I/SN?
For technical support, including 24LC02B-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC02B-I/SN requirements.
6.How does Aetrix verify that 24LC02B-I/SN is sourced from the original manufacturer or authorized distributors?
All 24LC02B-I/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 24LC02B-I/SN meets industry standards.
7.What is the process for return or replacement of 24LC02B-I/SN?
All 24LC02B-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC02B-I/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 24LC02B-I/SN part is unused and in its original packaging.
Return procedure for 24LC02B-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC02B-I/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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