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Microchip Technology 24LC08B-E/ST
- Part No.:
- 24LC08B-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC08B-E/ST.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,746
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Product details
Overview
24LC08B-E/ST 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, 5 ms max page write time, and industrial/extended temperature support (–40°C to +125°C). It features hardware write-protection via the WP pin, Schmitt-trigger inputs, and 16-byte page write buffer - used for configuration storage in embedded controllers and sensor calibration data retention.
For engineers reviewing the 24LC08B-E/ST datasheet, 24LC08B-E/ST pinout, 24LC08B-E/ST application, or 24LC08B-E/ST equivalent, this page delivers verified electrical specs, SOIC-8 package details, I²C timing constraints, endurance (1M cycles), and real-world use cases in automotive and industrial systems requiring nonvolatile memory with noise-immune bus interface.
Technical Context
The 24LC08B-E/ST implements a two-wire I²C interface with open-drain SDA/SCL pins, internal address pointer, and page latches enabling up to 16-byte buffered writes. Its architecture includes HV generator for EEPROM programming, sense amplifiers, and memory control logic synchronized to external SCL.
It supports standard-mode I²C (400 kHz) at VCC ≥ 2.5V, uses fixed 4-bit device code '1010', and selects one of four 256-word blocks via B1/B0 bits in the control byte. Write protection is implemented via dedicated WP pin tied to VCC (full-array lock) or VSS (enabled).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), organized as four independent 256-word blocks - enables segmented firmware/config storage without cross-block interference. |
| VCC Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains; excludes sub-2.5V operation unlike 24AA08/24FC08 variants. |
| Max Clock Frequency | 400 kHz - defines maximum I²C bus throughput; requires ≤2 kΩ pull-up for reliable timing at full speed. |
| Page Write Buffer | 16 bytes - allows burst writes within a single physical page (0–15, 16–31, etc.), reducing host overhead vs. byte-by-byte writes. |
| Write Cycle Time | 5 ms maximum - determines minimum interval between write commands; impacts system responsiveness during config updates. |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable applications like metering or telemetry loggers. |
| Data Retention | 200 years - guarantees persistent storage integrity across product lifecycle without refresh. |
Pinout & Package
24LC08B-E/ST is supplied in 8-Lead SOIC (SN) package per Microchip drawing C04-057-SN Rev F, with 1.27 mm pitch, 3.90 mm body width, and exposed pad not present. Pin 1 is marked by notch or bevel; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS | Ground reference | Return path for all internal circuits; must be low-impedance connection to system GND plane. |
| WP | Hardware write-protect input | Logic-high disables all write operations (000h–3FFh); tied to VSS for full read/write access. |
| SCL | Serial clock input | Asynchronous edge-triggered clock for I²C synchronization; requires external pull-up resistor. |
| SDA | Serial data bidirectional I/O | Open-drain bus line shared with other I²C devices; requires external pull-up and supports multi-master arbitration. |
| VCC | Power supply | 2.5V–5.5V input powering EEPROM core and interface; decoupling capacitor (0.1 µF) required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs on SDA/SCL | 5% VCC hysteresis (min) suppresses bus noise and prevents false edge detection in electrically noisy environments. |
| Output slope control | Controlled rise/fall times eliminate ground bounce during switching - critical for stable I²C communication on dense PCBs. |
| Self-timed erase/write cycle | No external timing components needed; internal state machine manages charge pump and verify sequence automatically. |
| ESD protection >4 kV | HBM rating exceeds IEC 61000-4-2 Level 2, enabling robust handling during assembly and field service. |
| RoHS-compliant & AEC-Q100 qualified | Meets automotive reliability standards (Grade 1: –40°C to +125°C), supporting under-hood and ADAS module integration. |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Storing calibrated offset/gain coefficients and fault history logs in temperature/humidity sensors deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding device-specific trim values accessed at power-on reset. Use Value: Enables plug-and-play sensor replacement without manual recalibration; 200-year data retention ensures lifetime accuracy. |
Use Scenario: Saving seat position memory, mirror angle presets, and door lock status across ignition cycles in passenger vehicles. IC Role / Device Role / Timing Role: Persistent parameter store interfaced directly to microcontroller I²C peripheral with WP pin grounded for runtime writes. Use Value: Supports AEC-Q100 Grade 1 operation at 125°C ambient, meeting under-dash thermal requirements. |
| Smart Energy Meter | Medical Diagnostic Equipment |
Use Scenario: Recording tariff schedules, billing cycle counters, and tamper-event timestamps in utility meters with 10+ year field life. IC Role / Device Role / Timing Role: Secure configuration vault storing cryptographic keys and firmware version metadata. Use Value: 1M write cycles allow daily logging over 27 years; hardware WP prevents accidental overwrite during firmware updates. |
Use Scenario: Storing calibration constants for analog front-end channels and user-defined test protocols in portable ultrasound devices. IC Role / Device Role / Timing Role: Low-power I²C slave memory accessed only during boot or maintenance mode to minimize active current draw. Use Value: 1 µA standby current extends battery life; 2.5V min VCC supports operation from partially discharged Li-ion cells. |
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/ST | Wider VCC range (1.7V–5.5V); lower 100 kHz max clock below 2.5V; same 8-Kbit organization and SOIC-8 package. | Preferred for battery-powered systems operating down to 1.8V; unsuitable where 400 kHz I²C speed is mandatory at low voltage. | Select 24AA08-I/ST when sub-2.5V operation is required; retain 24LC08B-E/ST for fixed 3.3V/5V designs needing guaranteed 400 kHz performance. |
| 24FC08-E/ST | 1 MHz max clock frequency; 1.7V–5.5V VCC; identical pinout and memory map; no WP pin on CSP variant (not applicable here). | Enables higher-throughput configuration loading in high-speed microcontroller systems; shares same extended temp grade. | Choose 24FC08-E/ST when I²C bus bandwidth exceeds 400 kHz; otherwise, 24LC08B-E/ST offers optimal cost/performance balance for standard-speed applications. |
Compared with 24AA08-I/ST and 24FC08-E/ST, the 24LC08B-E/ST provides deterministic 400 kHz I²C operation across its full 2.5V–5.5V range - making it the most suitable choice for industrial and automotive designs where timing predictability and voltage margin are prioritized over ultra-low-voltage or maximum-speed operation.
Availability
24LC08B-E/ST is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and smart energy meters requiring stable component supply, AEC-Q100 qualification, and long-term data retention.
Supply support for 24LC08B-E/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 infrastructure.
The 24LC08B belongs to Microchip's legacy serial EEPROM product line, engineered for cost-sensitive, high-reliability applications demanding proven I²C compatibility, extended temperature operation, and robust write-protection - especially in automotive and industrial control systems.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC08B-E/ST?
The 24LC08B-E/ST requires a minimum VCC of 2.5V for guaranteed functionality across its full temperature range (–40°C to +125°C). Operation below 2.5V is not supported - unlike the 24AA08 or 24FC08 variants - and may result in undefined behavior or I²C communication failure. Always maintain VCC ≥2.5V in designs using the 24LC08B-E/ST.
Does the 24LC08B-E/ST support page write operations, and what is the maximum buffer size?
Yes, the 24LC08B-E/ST supports page write operations with a 16-byte page buffer. This allows up to 16 sequential bytes to be loaded into the internal latch before initiating the self-timed write cycle. Writes crossing physical page boundaries (every 16 bytes) wrap around within the same page - so software must enforce alignment to avoid unintended overwrites in the 24LC08B-E/ST.
How does the Write-Protect (WP) pin function on the 24LC08B-E/ST?
On the 24LC08B-E/ST, the WP pin is a dedicated hardware input: tying WP to VCC disables all write operations (including byte and page writes) across the entire 8-Kbit array (addresses 000h–3FFh), while reads remain fully functional. Tying WP to VSS enables normal read/write access. The SOIC-8 package fully supports this feature - unlike the CSP variant.
What I²C clock frequencies are supported by the 24LC08B-E/ST, and are there voltage dependencies?
The 24LC08B-E/ST supports up to 400 kHz I²C clock frequency across its entire specified VCC range (2.5V–5.5V), with no reduction at lower voltages. This differs from the 24AA08 (100 kHz below 2.5V) and ensures consistent high-speed communication in 3.3V and 5V systems - a key differentiator confirmed in the DS20001710M datasheet for the 24LC08B-E/ST.
Is the 24LC08B-E/ST qualified for automotive applications, and what standards does it meet?
Yes, the 24LC08B-E/ST is AEC-Q100 qualified (Grade 1) and rated for extended temperature operation from –40°C to +125°C. It meets automotive reliability requirements including HTOL, TC, and ESD testing, and is RoHS compliant. These qualifications make the 24LC08B-E/ST suitable for under-hood and cabin electronics where environmental stress and long-term stability are critical.
24LC08B-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
24LC08B-E/ST FAQ
1.How can I place an order for 24LC08B-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08B-E/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 24LC08B-E/ST reliable?
The price and inventory of 24LC08B-E/ST 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/ST is usually 5 days.
3.What payment methods are accepted for 24LC08B-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08B-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08B-E/ST?
24LC08B-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08B-E/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 24LC08B-E/ST?
For technical support, including 24LC08B-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08B-E/ST requirements.
6.How does Aetrix verify that 24LC08B-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC08B-E/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 24LC08B-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC08B-E/ST?
All 24LC08B-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08B-E/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 24LC08B-E/ST part is unused and in its original packaging.
Return procedure for 24LC08B-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08B-E/ST Tags
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