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Microchip Technology 24LC08B-I/SN
- Part No.:
- 24LC08B-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC08B-I/SN.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,654
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Product details
Overview
24LC08B-I/SN from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit memory blocks. It operates from 2.5V to 5.5V, supports up to 400 kHz clock frequency, features hardware write-protection via the WP pin, and delivers ≤1 µA standby current at industrial temperature (–40°C to +85°C). It is commonly used in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.
For engineers reviewing the 24LC08B-I/SN datasheet, 24LC08B-I/SN pinout, 24LC08B-I/SN application, or 24LC08B-I/SN equivalent, key selection criteria include VCC range compatibility (2.5–5.5V), I²C timing compliance at 400 kHz, SOIC-8 package footprint, WP-enabled hardware lock, and guaranteed 1 million write cycles with >200-year data retention.
Technical Context
The 24LC08B-I/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 write buffer, self-timed erase/write cycle, and address pointer logic enabling current-address, random, and sequential read modes.
It uses a fixed 4-bit device identifier (1010) with 2-bit block select (B1/B0) for accessing four 256-word memory blocks. Write protection is implemented via a dedicated WP pin tied to VCC to inhibit all writes while permitting reads - a feature supported in SOIC-8 but not in CSP packages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), organized as four independent 256-word blocks for segmented access control |
| VCC Range | 2.5V to 5.5V - ensures compatibility with 3.3V and 5V microcontroller I/O domains without level shifting |
| Max Clock Frequency | 400 kHz - enables fast byte/page writes while maintaining robustness on noisy PCBs |
| Page Write Buffer | 16 bytes - reduces bus overhead by allowing burst writes within a single I²C transaction |
| Write Endurance | 1,000,000 cycles - supports frequent recalibration or logging in industrial monitoring systems |
| Data Retention | >200 years - guarantees long-term integrity of factory-trimmed coefficients or security keys |
| Standby Current | ≤1 µA (I-temp.) - critical for battery-powered IoT nodes requiring multi-year operation |
Pinout & Package
24LC08B-I/SN is supplied in an 8-lead narrow-body SOIC (SN) package per Microchip drawing C04-057-SN Rev F, with standard 1.27 mm pitch and 3.90 mm body width. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pin 4) | Ground reference | Must be connected to system GND; serves as return path for all I/O and internal logic |
| WP (Pin 7) | Hardware write-protect input | Tie to VCC to disable all write operations; tie to VSS to enable full read/write access |
| SCL (Pin 6) | Serial clock input | Open-drain input synchronized to host MCU's I²C clock; requires external pull-up resistor |
| SDA (Pin 5) | Serial data I/O | Bidirectional open-drain line for address/data transfer; requires external pull-up resistor |
| VCC (Pin 8) | Power supply | Supplies core logic and EEPROM array; must be decoupled with ≥0.1 µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Eliminates false triggering from bus noise by providing ≥50 mV hysteresis on SDA/SCL lines |
| Output slope control | Slows edge rates to prevent ground bounce and EMI during I²C transitions |
| Page write capability | Reduces firmware overhead by enabling up to 16-byte writes in one Stop-initiated transaction |
| Hardware write-protect | Physically disables write commands without software intervention - essential for field-deployed calibration safety |
| ESD protection | >4 kV HBM rating ensures robustness during handling and board-level integration |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-calibrated gain/offset coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding trim values accessed at power-on reset. Use Value: Enables plug-and-play sensor replacement without reprogramming; leverages 1M-cycle endurance for periodic recalibration. | Use Scenario: Saving user-defined settings (e.g., display brightness, network parameters) in medical infusion pumps. IC Role / Device Role / Timing Role: Persistent parameter store updated only when settings change, accessed via I²C during boot or menu navigation. Use Value: Guarantees settings survive power loss; low 1 µA standby current extends battery life in portable units. |
| Power-Fail Data Backup | Firmware Patch Storage |
Use Scenario: Capturing last-known operational state (e.g., valve position, motor speed) during unexpected AC mains dropout in HVAC controllers. IC Role / Device Role / Timing Role: Fast-write-capable memory triggered by brown-out detection circuitry before shutdown. Use Value: 5 ms max write cycle allows safe save within typical capacitor hold-up time; hardware WP prevents corruption during fault conditions. | Use Scenario: Holding field-upgradable firmware patches in smart metering gateways prior to secure execution. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for signed update binaries verified before loading into main flash. Use Value: Hardware write-protect (WP = VCC) prevents accidental overwrites; >200-year retention ensures patch validity across product lifetime. |
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); supports 100 kHz below 2.5V; same 8Kbit capacity and SOIC-8 package | Preferred for 1.8V/2.5V systems where 24LC08B-I/SN cannot operate | Select 24AA08-I/SN if supply voltage may dip below 2.5V; otherwise 24LC08B-I/SN offers higher speed at 400 kHz across full 2.5–5.5V range |
| AT24C08C-SSHM-T | Same 8Kbit size, SOIC-8, I²C interface; rated for 1 MHz clock (vs. 400 kHz), lower 0.5 µA standby current | Requires verification of timing margin in high-noise environments due to faster edges | Choose AT24C08C-SSHM-T for higher throughput in clean 3.3V designs; retain 24LC08B-I/SN for proven noise immunity in industrial settings |
Compared with 24AA08-I/SN and AT24C08C-SSHM-T, the 24LC08B-I/SN provides optimal balance of speed (400 kHz), noise resilience (Schmitt triggers + slope control), and industrial-grade reliability - making it preferred for mission-critical configuration storage where deterministic timing and robustness outweigh raw bandwidth.
Availability
24LC08B-I/SN is available at Aetrix Electronics and suitable for industrial automation, medical device configuration, and automotive subsystems requiring stable component supply and long-term obsolescence management.
Supply support for 24LC08B-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 components, and nonvolatile memory solutions, serving industrial, automotive, and consumer markets with high-reliability silicon.
The 24LC08B belongs to Microchip's legacy 24XX08 EEPROM family, designed specifically for low-power, noise-immune I²C-based configuration and calibration data storage in space-constrained embedded systems.
FAQ
What is the minimum operating voltage for 24LC08B-I/SN?
The 24LC08B-I/SN requires a minimum VCC of 2.5V, as specified in its electrical characteristics table. Unlike the 24AA08 variant, it is not rated for operation below 2.5V - attempting to power it at 1.8V or 2.3V will result in undefined behavior or failure to respond on the I²C bus. Always verify supply rail stability within 2.5V–5.5V during design validation.
Does 24LC08B-I/SN support page write operations, and what is the maximum page size?
Yes, the 24LC08B-I/SN supports page write operations with a maximum buffer size of 16 bytes. This allows up to 16 consecutive bytes to be loaded into the on-chip latch and written to memory in a single internal cycle after the Stop condition. Page boundaries align to 16-byte offsets (e.g., 0x00–0x0F, 0x10–0x1F), and crossing a boundary causes wraparound - so firmware must enforce alignment.
How does the WP pin function on 24LC08B-I/SN, and is it active-high or active-low?
The WP pin on 24LC08B-I/SN is active-high: when tied to VCC, it disables all write operations (including byte, page, and write-enable commands) while permitting unrestricted reads. When tied to VSS (or left floating, though not recommended), full read/write access is enabled. This hardware lock provides fail-safe protection against accidental overwrites during field updates or power transients.
What is the maximum I²C clock frequency supported by 24LC08B-I/SN?
The 24LC08B-I/SN supports a maximum I²C clock frequency of 400 kHz across its full operating voltage range of 2.5V to 5.5V. It does not support the 1 MHz mode available in the 24FC08 variant. Timing parameters such as THIGH, TLOW, and TSU:DAT are guaranteed only up to 400 kHz - exceeding this may cause ACK failures or data corruption.
Is 24LC08B-I/SN qualified for automotive applications?
No, the 24LC08B-I/SN is rated for Industrial temperature range (–40°C to +85°C) and is not AEC-Q100 qualified. While the broader 24XX08 family includes AEC-Q100 qualified variants (e.g., 24LC08BT-I/SN with "T" suffix), the 24LC08B-I/SN part number itself carries no automotive qualification. For automotive use, confirm the exact suffix and consult Microchip's automotive product matrix before selection.
24LC08B-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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC08B-I/SN FAQ
1.How can I place an order for 24LC08B-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08B-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 24LC08B-I/SN reliable?
The price and inventory of 24LC08B-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 24LC08B-I/SN is usually 5 days.
3.What payment methods are accepted for 24LC08B-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08B-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08B-I/SN?
24LC08B-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08B-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 24LC08B-I/SN?
For technical support, including 24LC08B-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08B-I/SN requirements.
6.How does Aetrix verify that 24LC08B-I/SN is sourced from the original manufacturer or authorized distributors?
All 24LC08B-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 24LC08B-I/SN meets industry standards.
7.What is the process for return or replacement of 24LC08B-I/SN?
All 24LC08B-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08B-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 24LC08B-I/SN part is unused and in its original packaging.
Return procedure for 24LC08B-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08B-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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AT24CS02-SSHM-T
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93LC46BT-I/OT
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