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Microchip Technology 24LC02BT/ST
- Part No.:
- 24LC02BT/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC02BT/ST.pdf
- Description:
- IC EEPROM 2KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,153
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Product details
Overview
24LC02BT/ST from Microchip Technology Inc. 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, features Schmitt-trigger inputs and slope-controlled outputs, and is qualified for industrial temperature range (–40°C to +85°C) in SOIC-8 package - used for firmware storage, calibration data retention, and configuration backup in embedded controllers.
For engineers reviewing the 24LC02BT/ST datasheet, 24LC02BT/ST pinout, 24LC02BT/ST application, or 24LC02BT/ST equivalent, key selection criteria include VCC min/max (2.5V–5.5V), I²C clock compatibility (400 kHz), write-protection via WP pin, 5 ms max page write time, and industrial-grade reliability with >1 million erase/write cycles and >200 years data retention.
Technical Context
The 24LC02BT/ST implements a two-wire I²C interface with fixed 7-bit device address (1010xxx) and R/W bit control, supporting byte and page write modes. Its internal architecture includes an 8-byte page latch, address pointer auto-increment logic, and HV generator for EEPROM programming - all managed by on-chip control logic without external timing components.
It uses open-drain SDA/SCL with internal Schmitt triggers and noise filtering (50 ns spike suppression), requires external pull-up resistors, and relies on acknowledge polling to detect write completion. The WP pin provides hardware-level protection of the full 256-byte array when tied to VCC, independent of software commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit), sufficient for storing bootloader config, sensor calibration tables, or device ID strings |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V systems; not operable below 2.5V |
| I²C Clock Speed | Up to 400 kHz - enables fast configuration reads/writes without requiring high-speed MCU peripherals |
| Page Write Buffer | 8 bytes - reduces bus transactions for multi-byte updates; prevents partial writes across page boundaries |
| Write Cycle Time | ≤5 ms per byte or page - defines minimum delay before next I²C command; impacts system responsiveness during non-volatile updates |
| Data Retention | >200 years at 85°C - ensures long-term validity of stored parameters in unpowered industrial deployments |
| Endurance | 1,000,000 erase/write cycles - supports frequent recalibration or logging in field-upgradable devices |
Pinout & Package
24LC02BT/ST is supplied in 8-lead SOIC (Small Outline Integrated Circuit) package, 3.90 mm body width, with standard JEDEC MS-012AC footprint and wettable flanks option available. Pin 1 is marked with notch or dot; pin numbering follows counterclockwise convention from top-left corner.
| 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 this part |
| A1 | Device Address Input | No internal connection; no impact on I²C address (fixed 1010xxx) |
| A2 | Device Address Input | No internal connection; unused in 24LC02B family |
| VSS | Ground Reference | System ground return path; must be low-impedance for stable EEPROM operation |
| SDA | Serial Data I/O | Open-drain bidirectional bus line; requires external pull-up (2–10 kΩ); carries address, data, and ACK signals |
| SCL | Serial Clock Input | Master-generated clock; synchronizes all data transfers; Schmitt-trigger input suppresses noise |
| WP | Write-Protect Control | Hardware lock: tied to VCC → full-array write inhibit; tied to VSS → normal read/write access |
| VCC | Power Supply | Primary supply rail (2.5–5.5V); powers internal logic and EEPROM programming circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write-Protection | Physical WP pin disables all write operations when pulled high - eliminates risk of accidental overwrites in fielded systems |
| Page Write Capability | 8-byte buffer allows atomic multi-byte writes within one I²C transaction - improves update reliability and reduces bus overhead |
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC suppresses bus noise up to 50 ns spikes - enhances robustness in electrically noisy environments |
| Low Standby Current | 1 µA max at 85°C - minimizes power draw in battery-backed or energy-sensitive applications |
| AEC-Q100 Qualified | Automotive-grade reliability validated per AEC-Q100 Rev G - suitable for under-hood and infotainment subsystems |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile parameter storage accessed during power-up initialization via I²C. Use Value: Enables plug-and-play sensor replacement without manual recalibration; retains values across 200+ years with no backup power. | Use Scenario: Holding user-defined settings (baud rate, network ID, alarm thresholds) in HVAC control panels. IC Role / Device Role / Timing Role: Configuration memory updated infrequently but read at every boot; accessed via standard I²C master. Use Value: Supports field reconfiguration without firmware reflashing; WP pin prevents corruption during brown-out events. |
| Medical Device Identity Storage | Smart Meter Firmware Backup |
Use Scenario: Securing unique device identifiers, regulatory certifications, and calibration history in portable diagnostic tools. IC Role / Device Role / Timing Role: Tamper-resistant identity register accessed during USB enumeration or BLE pairing. Use Value: Hardware WP ensures critical IDs remain immutable after manufacturing; 1M endurance supports lifetime device tracking. | Use Scenario: Storing fallback firmware images and metering constants in utility smart meters deployed for 15+ years. IC Role / Device Role / Timing Role: Redundant code/data storage accessible via microcontroller's I²C peripheral during OTA update recovery. Use Value: >200-year data retention guarantees integrity of backup assets across full product lifecycle without refresh. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA02T/ST | Wider VCC range (1.7–5.5V); same 2-Kbit size, 400 kHz, SOIC-8 package | Supports 1.8V microcontrollers; lacks AEC-Q100 qualification | Select when operating below 2.5V or in non-automotive contexts where extended voltage margin is needed |
| AT24C02D-SSHM-T | Same 2-Kbit, SOIC-8, 400 kHz; 1.7–5.5V VCC; RoHS-compliant; manufactured by Microchip (formerly Atmel) | Identical functional spec; different marking and traceability; no AEC-Q100 documentation confirmed | Preferred for legacy Atmel-design ecosystems or where dual-sourcing from same fab is required |
Compared with 24LC02BT/ST, the 24AA02T/ST offers lower-voltage operation but omits automotive qualification, while AT24C02D-SSHM-T matches electrical specs exactly but lacks published AEC-Q100 validation - making 24LC02BT/ST the optimal choice for industrial and automotive applications requiring guaranteed reliability at 2.5V+.
Availability
24LC02BT/ST is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and smart energy metering requiring stable component supply, long-lifecycle support, and automotive-grade qualification.
Supply support for 24LC02BT/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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC02B series was designed specifically for reliable, low-power non-volatile storage in space-constrained embedded systems - emphasizing write-protection integrity, noise immunity, and extended data retention for mission-critical applications.
FAQ
What is the minimum operating voltage for the 24LC02BT/ST?
The 24LC02BT/ST requires a minimum VCC of 2.5V and operates up to 5.5V. Unlike the 24AA02 variant, it is not rated for 1.7V operation. Attempting to power the 24LC02BT/ST below 2.5V may result in unreliable I²C communication or failed write cycles. Always verify supply stability within this range during system power-up and brown-out conditions.
Does the 24LC02BT/ST support 1 MHz I²C clock speed?
No, the 24LC02BT/ST supports up to 400 kHz I²C clock frequency. The 24FC02 variant supports 1 MHz, but the 24LC02BT/ST is limited to 400 kHz across its full VCC range (2.5V–5.5V). Exceeding this limit may cause timing violations, missed acknowledges, or incomplete writes - especially under temperature extremes or capacitive bus loads.
How does the WP pin function on the 24LC02BT/ST?
On the 24LC02BT/ST, the WP (Write-Protect) pin is a dedicated hardware enable/disable control. When tied to VCC, all write operations (byte and page) to the entire 256-byte memory array are inhibited - reads remain fully functional. When tied to VSS (or left floating, though not recommended), normal read/write access is enabled. This provides deterministic, glitch-immune protection independent of firmware state.
What package type is used for the 24LC02BT/ST?
The 24LC02BT/ST is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with 3.90 mm body width, per JEDEC MS-012AC standard. The "ST" suffix explicitly denotes this SOIC package. It is not available in DFN, TSSOP, or SOT-23 variants under this part number - those use different suffixes (e.g., "SN", "MNY", "OT").
Is the 24LC02BT/ST qualified for automotive applications?
Yes, the 24LC02BT/ST is AEC-Q100 qualified for automotive applications. It meets stress test requirements for temperature cycling, humidity, and ESD (>4 kV HBM), and is rated for industrial temperature range (–40°C to +85°C), which satisfies many automotive sub-system requirements including body control modules and infotainment interfaces.
24LC02BT/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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC02BT/ST FAQ
1.How can I place an order for 24LC02BT/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC02BT/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/ST reliable?
The price and inventory of 24LC02BT/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/ST is usually 5 days.
3.What payment methods are accepted for 24LC02BT/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC02BT/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC02BT/ST?
24LC02BT/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC02BT/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/ST?
For technical support, including 24LC02BT/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC02BT/ST requirements.
6.How does Aetrix verify that 24LC02BT/ST is sourced from the original manufacturer or authorized distributors?
All 24LC02BT/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/ST meets industry standards.
7.What is the process for return or replacement of 24LC02BT/ST?
All 24LC02BT/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC02BT/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/ST part is unused and in its original packaging.
Return procedure for 24LC02BT/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC02BT/ST Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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