My Inquiry
My Account
Microchip Technology 24LC02B/SN
- Part No.:
- 24LC02B/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC02B/SN.pdf
- Description:
- IC EEPROM 2KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,144
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC02B/SN from Microchip Technology Inc. is a 2-Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 5 ms max page write time, and hardware write-protection via the WP pin. It supports industrial (–40°C to +85°C) and extended (–40°C to +125°C) temperature ranges in an 8-lead SOIC package and is used for storing calibration data, configuration settings, and device identifiers in embedded control systems.
For engineers reviewing the 24LC02B/SN datasheet, 24LC02B/SN pinout, 24LC02B/SN application, or 24LC02B/SN equivalent, this page delivers verified electrical specs, validated SOIC-8 pin mapping, real-world use cases in automotive and industrial systems, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The 24LC02B/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-byte page write buffer, self-timed erase/write cycle, and address pointer logic enabling current-address, random, and sequential read modes.
It uses open-drain SDA/SCL signaling requiring external pull-up resistors (e.g., 2 kΩ for 400 kHz), supports ACK polling to detect write completion, and enforces hardware write protection when WP = VCC - all while maintaining compatibility with standard I²C protocol timing including Start/Stop conditions and 7-bit addressing with fixed '1010' control code.
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 | 2.5V to 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 control loops. |
| Page Write Time | 5 ms maximum - defines worst-case latency for updating up to 8 bytes atomically. |
| Write Endurance | 1 million cycles - supports frequent recalibration in test equipment or field-upgradable modules. |
| Data Retention | 200 years - ensures long-term validity of stored device identity or security keys. |
| ESD Protection | >4,000 V HBM - provides robustness against handling-induced transients in manufacturing environments. |
Pinout & Package
24LC02B/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, 3.90 mm wide, with gull-wing leads and JEDEC-standard footprint (package code SN). Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection; may be left floating or tied to VSS/VCC - does not affect device addressing. |
| A1 | Address Input | No internal connection; no impact on I²C slave address (fixed at 1010xxx0/1). |
| A2 | Address Input | No internal connection; unused per datasheet Table 2-1 and Section 2.1. |
| VSS | Ground Reference | Return path for all internal circuitry; must be connected to system GND plane for stable operation. |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up resistor (2 kΩ typical for 400 kHz). |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; determines data transfer rate and timing margins. |
| WP | Write-Protect Control | Logic-high (VCC) disables all writes; logic-low (VSS) enables full read/write access to 00h–FFh memory space. |
| VCC | Power Supply | Primary supply rail (2.5–5.5V); powers EEPROM array, interface logic, and internal HV generator for write operations. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write-Protection | WP pin physically disables write commands - prevents accidental overwrites during power-up or firmware glitches. |
| 8-Byte Page Write Buffer | Reduces I²C transaction count when updating multiple adjacent bytes, improving bus efficiency and reducing host CPU overhead. |
| Schmitt Trigger Inputs | Provides hysteresis (≥0.05×VCC) on SDA/SCL to reject noise spikes up to 50 ns - critical for reliable operation in electrically noisy industrial environments. |
| I²C Bus Compatibility | Fully compliant with standard-mode (100 kHz), fast-mode (400 kHz), and timing requirements - interoperable with MCU peripherals from STM32, PIC, and ARM Cortex families. |
| Low Standby Current | 1 µA maximum at I-temp - extends battery life in always-on IoT nodes or portable diagnostic tools. |
Applications
| Industrial Sensor Calibration | Automotive ECU Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed once at power-up; I²C read completes in <100 µs per byte. Use Value: Eliminates need for external trimming potentiometers and enables field recalibration via service tool without hardware modification. | Use Scenario: Holding vehicle-specific parameters (e.g., VIN-derived keys, throttle map variants) in body control modules. IC Role / Device Role / Timing Role: Secure boot-time configuration loader; WP pin tied to VCC after programming to prevent tampering. Use Value: Meets AEC-Q100 Grade 1 requirements and supports secure, write-protected parameter storage independent of main microcontroller flash. |
| Medical Device Serial Numbering | Consumer Appliance Settings Storage |
Use Scenario: Recording unique device IDs, manufacturing date codes, and regulatory compliance flags in FDA-cleared diagnostic instruments. IC Role / Device Role / Timing Role: Tamper-evident identity register; written once during final test, then permanently write-protected. Use Value: Provides auditable traceability with 200-year data retention - satisfies ISO 13485 documentation lifecycle requirements. | Use Scenario: Saving user preferences (e.g., temperature setpoints, display brightness) across power cycles in smart thermostats and HVAC controllers. IC Role / Device Role / Timing Role: Low-power background storage; accessed only during UI state changes or wake-from-sleep events. Use Value: Enables zero-battery-consumption retention using 1 µA standby current - extends shelf life and reduces maintenance in battery-powered units. |
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 (1.7–5.5V); supports 100 kHz below 2.5V; same 2-Kbit size and SOIC-8 package. | Preferred for 1.8V systems (e.g., low-power MCUs) where 24LC02B/SN cannot operate. | Select 24AA02-I/SN when supply voltage may dip below 2.5V; verify timing margins at reduced VCC. |
| AT24C02C-SSHM-T | Same 2-Kbit capacity and I²C interface; rated for –40°C to +85°C only; 1 MHz max clock; different write endurance (400k cycles). | Used in cost-sensitive consumer electronics where extended temperature range is unnecessary. | Choose AT24C02C-SSHM-T for high-volume, non-automotive designs needing faster clocking but no E-temp support. |
Compared with 24LC02B/SN, 24AA02-I/SN enables lower-voltage operation at the cost of reduced max clock speed below 2.5V, while AT24C02C-SSHM-T trades extended temperature capability and endurance for higher-speed I²C and lower unit cost in commercial-grade applications.
Availability
24LC02B/SN is available at Aetrix Electronics and suitable for industrial automation, automotive subsystems, and medical instrumentation requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 24LC02B/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 legacy 24XX02 EEPROM family, designed specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained embedded systems across automotive, industrial, and medical markets.
FAQ
What is the exact memory organization of the 24LC02B/SN?
The 24LC02B/SN contains 256 words of 8-bit memory (2 Kbit total), arranged as a single block addressed from 00h to FFh. It supports byte-write and 8-byte page-write operations, with an internal address pointer that auto-increments during sequential reads. This structure is fixed and identical across all 24LC02B variants, regardless of package type like the /SN SOIC variant.
Does the 24LC02B/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC02B/SN requires external pull-up resistors on both SDA and SCL because these pins are open-drain. For 400 kHz operation, a 2 kΩ resistor to VCC is recommended; for 100 kHz, 10 kΩ is typical. The 24LC02B/SN datasheet specifies this in Section 2.2 and Figure 4-1, and omission will result in bus failure.
Can the A0, A1, and A2 pins on the 24LC02B/SN be used to configure the I²C address?
No - the A0, A1, and A2 pins on the 24LC02B/SN have no internal connection and do not affect the I²C slave address. As confirmed in Section 2.1 and Table 2-1 of the DS20001709N datasheet, the device uses a fixed 4-bit control code '1010' followed by three "don't care" bits, resulting in a static 7-bit address of 0x50 (write) or 0x51 (read), independent of A0–A2 states.
What is the purpose of the WP pin on the 24LC02B/SN, and how should it be connected?
The WP (Write-Protect) pin on the 24LC02B/SN enables hardware-level write inhibition: tying WP to VCC blocks all write operations to the entire memory array (00h–FFh), while tying it to VSS enables full read/write access. This feature is implemented internally and requires no software overhead - it is active immediately upon power-up and remains effective even during I²C communication, as specified in Section 2.4.
Is the 24LC02B/SN qualified for automotive applications?
Yes, the 24LC02B/SN is AEC-Q100 qualified for automotive applications and rated for extended temperature operation from –40°C to +125°C. This qualification is explicitly stated in the Features section of DS20001709N and applies to all 24LC02B variants, including the /SN SOIC package, making it suitable for engine control, body electronics, and ADAS subsystems where reliability under thermal stress is mandatory.
24LC02B/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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC02B/SN FAQ
1.How can I place an order for 24LC02B/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC02B/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/SN reliable?
The price and inventory of 24LC02B/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/SN is usually 5 days.
3.What payment methods are accepted for 24LC02B/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC02B/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC02B/SN?
24LC02B/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC02B/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/SN?
For technical support, including 24LC02B/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC02B/SN requirements.
6.How does Aetrix verify that 24LC02B/SN is sourced from the original manufacturer or authorized distributors?
All 24LC02B/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/SN meets industry standards.
7.What is the process for return or replacement of 24LC02B/SN?
All 24LC02B/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC02B/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/SN part is unused and in its original packaging.
Return procedure for 24LC02B/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC02B/SN 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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
