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Microchip Technology 24LC08B-E/SN
- Part No.:
- 24LC08B-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC08B-E/SN.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:275
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Product details
Overview
24LC08B-E/SN from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 16-byte page write buffer, and hardware write-protection via WP pin. It supports industrial (–40°C to +85°C) and extended (–40°C to +125°C) temperature ranges in 8-lead SOIC (SN) package and is used for configuration storage in embedded controllers and power management systems.
For engineers reviewing the 24LC08B-E/SN datasheet, 24LC08B-E/SN pinout, 24LC08B-E/SN application, or 24LC08B-E/SN equivalent, key selection criteria include VCC range (2.5–5.5V), I²C timing compliance at 400 kHz, WP-enabled hardware protection, 5 ms max page write time, and SOIC-8 thermal/physical compatibility in space-constrained industrial PCBs.
Technical Context
The 24LC08B-E/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 a 16-byte page latch, address pointer, and HV generator for EEPROM programming - enabling self-timed erase/write cycles without external timing components.
It uses a fixed 4-bit device identifier (1010) with 2-bit block select (B1/B0) and R/W bit for addressing four independent 256-word memory blocks. Write protection is implemented via dedicated WP pin tied to VCC (full-array lock) or VSS (enabled), with no internal connection to A0–A2 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.5V to 5.5V - defines minimum system supply voltage for reliable operation; excludes 1.7V low-voltage capability of 24AA08/24FC08 variants |
| Max Clock Frequency | 400 kHz - sets maximum I²C bus speed under full VCC range; not rated for 1 MHz like 24FC08 |
| Memory Organization | 4 × 256 × 8-bit blocks - enables independent addressing of 1K-word segments using B1/B0 bits in control byte |
| Page Write Buffer | 16 bytes - allows burst writes within one physical page boundary (0–15, 16–31, etc.), reducing host transaction overhead |
| Write Cycle Time | 5 ms maximum - determines minimum interval between successive write commands; impacts firmware polling or timeout design |
| Data Retention | 200 years - specifies guaranteed nonvolatile data integrity under specified temperature and voltage conditions |
| Endurance | 1 million erase/write cycles - defines usable lifetime for frequently updated configuration or calibration data |
Pinout & Package
24LC08B-E/SN is packaged in 8-lead SOIC (SN), 3.90 mm body width, with gull-wing leads and JEDEC-standard pinout. The exposed pad is not present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Primary return path for all internal circuitry; must be low-impedance connection to system GND plane |
| WP | Hardware write-protect input | Logic-high (VCC) disables all write operations to entire 8-Kbit array; logic-low (VSS) enables full read/write access |
| SCL | Serial clock input | Asynchronous master-generated clock synchronizing all I²C transactions; requires external pull-up resistor |
| SDA | Bidirectional data I/O | Open-drain line shared across I²C bus; requires external pull-up; carries addresses, data, and ACK/NACK signals |
| VCC | Power supply | Single 2.5–5.5V supply powering EEPROM core, interface logic, and charge pump; decoupling capacitor required |
| A0, A1, A2 | No-connect terminals | Internally unconnected; may be left floating or tied to VSS/VCC without functional impact |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | 5% VCC hysteresis on SDA/SCL - rejects sub-50 ns noise spikes and ensures robust operation on electrically noisy industrial buses |
| Output slope control | Controlled rise/fall times - eliminates ground bounce during switching, preventing false logic transitions in mixed-signal systems |
| Page write capability | 16-byte buffer - reduces I²C transaction count by up to 16× versus byte-write mode, improving firmware efficiency and bus utilization |
| Hardware write-protection | Dedicated WP pin - provides tamper-resistant configuration locking without software intervention or firmware vulnerability |
| Extended temperature support | –40°C to +125°C operation - enables deployment in automotive engine compartments, industrial motor drives, and outdoor power electronics |
Applications
| Industrial Sensor Calibration Storage | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in HVAC, pressure, or current-sense modules deployed in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at power-up by MCU over I²C. Use Value: Enables field-replaceable sensors with pre-loaded calibration; 200-year retention ensures accuracy over product lifetime without battery backup. | Use Scenario: Saving user-defined settings (e.g., display brightness, communication baud rate, alarm thresholds) in medical infusion pumps or programmable logic controllers. IC Role / Device Role / Timing Role: System-level configuration EEPROM interfaced directly to main controller's I²C peripheral. Use Value: Survives >1M power cycles; WP pin prevents accidental overwrite during firmware updates or brown-out events. |
| Power Management Unit (PMU) Trim Data | Automotive Body Control Module (BCM) |
Use Scenario: Holding voltage/current trim values for DC-DC converters in telecom power supplies requiring precise output regulation. IC Role / Device Role / Timing Role: Dedicated trim memory accessed only during PMU initialization sequence via I²C. Use Value: 5 ms max write time allows fast calibration updates during production test; 1 µA standby current minimizes system quiescent draw. | Use Scenario: Storing door lock actuator profiles, mirror position presets, and lighting behavior maps in AEC-Q100-compliant BCMs. IC Role / Device Role / Timing Role: Automotive-grade EEPROM integrated into CAN gateway subsystem for nonvolatile parameter storage. Use Value: Extended temperature rating (–40°C to +125°C) and AEC-Q100 qualification ensure reliability in under-hood and cabin environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA08-I/SN | Wider VCC range (1.7–5.5V); 100 kHz max clock below 2.5V; same 8-Kbit organization and SOIC-8 package | Supports ultra-low-voltage systems (e.g., coin-cell-powered IoT nodes); lacks extended temperature grade | Select when operating below 2.5V or requiring industrial-only temp range without extended grade |
| 24FC08-I/SN | 1 MHz I²C clock support; 1.7–5.5V VCC; identical pinout and memory map but higher-speed timing | Enables faster configuration loading in high-throughput test fixtures or real-time control loops | Select when bus speed >400 kHz is required and 1.7V operation is needed; verify timing margins in target system |
Compared with 24AA08-I/SN and 24FC08-I/SN, the 24LC08B-E/SN trades lower voltage flexibility and reduced clock speed for guaranteed extended temperature operation and tighter VCC regulation - making it optimal for automotive and industrial applications where thermal stability outweighs raw speed or ultra-low-VCC needs.
Availability
24LC08B-E/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24LC08B-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 24LC08B belongs to Microchip's legacy serial EEPROM product line, designed specifically for reliable, low-power, I²C-based nonvolatile storage in cost-sensitive industrial and automotive applications where extended temperature operation and hardware write protection are critical.
FAQ
What is the minimum VCC required for reliable operation of the 24LC08B-E/SN?
The 24LC08B-E/SN requires a minimum VCC of 2.5V for guaranteed operation across its full temperature range. Unlike the 24AA08 or 24FC08 variants, it is not rated for 1.7V operation. Operating below 2.5V may result in undefined behavior, failed writes, or incomplete acknowledge responses. Always maintain VCC ≥2.5V in designs using the 24LC08B-E/SN.
Does the 24LC08B-E/SN support 1 MHz I²C communication?
No, the 24LC08B-E/SN is rated for a maximum clock frequency of 400 kHz across its full VCC range (2.5V–5.5V). It does not support 1 MHz operation - that capability is exclusive to the 24FC08 family. Attempting 1 MHz signaling will violate AC timing parameters (e.g., THIGH, TLOW) and cause communication failures. Use 24FC08-I/SN if 1 MHz I²C is required.
How does the WP pin function on the 24LC08B-E/SN?
The WP (Write-Protect) pin on the 24LC08B-E/SN is a dedicated hardware enable/disable control: when tied to VCC, all write operations (byte and page) to the entire 8-Kbit memory array are inhibited while reads remain fully functional; when tied to VSS, full read/write access is enabled. This provides deterministic, glitch-immune protection independent of firmware state.
What is the maximum number of bytes that can be written in a single page write cycle for the 24LC08B-E/SN?
The 24LC08B-E/SN supports a 16-byte page write buffer. A single page write operation can transfer up to 16 bytes before issuing the STOP condition. Writing beyond 16 bytes without an intervening STOP causes address pointer rollover and data overwrite within the same physical page - crossing page boundaries (e.g., address 15 → 16) results in wraparound, not sequential advancement.
Is the 24LC08B-E/SN qualified for automotive applications?
Yes, the 24LC08B-E/SN is AEC-Q100 qualified and rated for extended temperature operation from –40°C to +125°C. This qualification covers stress testing for temperature cycling, humidity, ESD, and electrical performance - confirming suitability for automotive body electronics, infotainment interfaces, and powertrain auxiliary modules where reliability under thermal extremes is mandatory.
24LC08B-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:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 256 x 8 x 4
- 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
24LC08B-E/SN FAQ
1.How can I place an order for 24LC08B-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08B-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 24LC08B-E/SN reliable?
The price and inventory of 24LC08B-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 24LC08B-E/SN is usually 5 days.
3.What payment methods are accepted for 24LC08B-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08B-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08B-E/SN?
24LC08B-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08B-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 24LC08B-E/SN?
For technical support, including 24LC08B-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08B-E/SN requirements.
6.How does Aetrix verify that 24LC08B-E/SN is sourced from the original manufacturer or authorized distributors?
All 24LC08B-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 24LC08B-E/SN meets industry standards.
7.What is the process for return or replacement of 24LC08B-E/SN?
All 24LC08B-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08B-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 24LC08B-E/SN part is unused and in its original packaging.
Return procedure for 24LC08B-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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