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Microchip Technology 24LC08BT/SN
- Part No.:
- 24LC08BT/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC08BT/SN.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,661
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Product details
Overview
24LC08BT/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, 5 ms max page write time, and hardware write-protection via the WP pin. It supports industrial temperature range (–40°C to +85°C) in 8-lead SOIC (SN) package and is used for configuration storage in embedded controllers and power management systems.
For engineers reviewing the 24LC08BT/SN datasheet, 24LC08BT/SN pinout, 24LC08BT/SN application, or 24LC08BT/SN equivalent, this page delivers verified electrical specs, SOIC-8 terminal mapping, I²C timing constraints, endurance (1M cycles), data retention (>200 years), and real-world substitution guidance - all specific to the 24LC08B variant in SN package.
Technical Context
The 24LC08BT/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, address pointer logic, and HV generator for EEPROM programming, enabling byte- and page-write operations with self-timed erase/write cycles.
It uses a fixed 4-bit device identifier (1010) plus 2-bit block select (B1/B0) for addressing four 256-word memory blocks, with R/W bit determining operation mode. Write protection is controlled solely by the WP pin state (VSS = enabled, VCC = disabled), and acknowledge polling is supported to detect write completion without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), organized as four independent 256-word blocks - enables segmented configuration storage with isolated access. |
| VCC Range | 2.5V to 5.5V - restricts use to systems with stable ≥2.5V supply; not compatible with 1.7V–2.49V low-voltage rails. |
| Max Clock Frequency | 400 kHz - defines maximum I²C bus speed; requires SCL rise/fall times ≤300 ns at VCC ≥2.5V. |
| Page Write Buffer | 16 bytes - allows burst writes within one physical page boundary (0–15, 16–31, etc.); crossing boundaries wraps data. |
| Write Cycle Time | 5 ms maximum - sets minimum inter-write interval; critical for firmware update sequencing and timeout design. |
| Endurance & Retention | 1,000,000 erase/write cycles and >200 years data retention - qualifies for long-life industrial logging and calibration storage. |
| Temperature Range | Industrial: –40°C to +85°C - validated for operation in automotive ECUs, industrial PLCs, and outdoor sensor nodes. |
Pinout & Package
24LC08BT/SN is supplied in 8-lead narrow SOIC (SN) package per Microchip drawing C04-057-SN Rev F, with standard 1.27 mm pitch, 3.90 mm body width, and gull-wing leads. Pin 1 is marked by notch or bevel on left end of top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (A0) | Not connected | No internal connection; may be left floating or tied to VSS/VCC without functional impact. |
| 2 (A1) | Not connected | No internal connection; no effect on addressing or operation regardless of state. |
| 3 (A2) | Not connected | No internal connection; unused in all 24LC08B variants including 24LC08BT/SN. |
| 4 (VSS) | Ground reference | Primary return path for all internal circuitry; must be low-impedance connection to system GND plane. |
| 5 (SDA) | Serial data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ typical for 400 kHz); carries addresses, data, and ACK/NACK. |
| 6 (SCL) | Serial clock input | Input-only clock line synchronized to host controller; rising edge samples SDA, falling edge permits SDA change. |
| 7 (WP) | Write-protect control | Active-high enable: tied to VCC locks entire memory (000–3FF hex); tied to VSS enables full read/write access. |
| 8 (VCC) | Power supply | Must be stabilized between 2.5V–5.5V; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Input hysteresis ≥0.05×VCC on SDA/SCL - rejects noise spikes up to 50 ns, ensuring reliable bus communication in EMI-prone environments. |
| Output slope control | Controlled SDA/SCL rise/fall rates - eliminates ground bounce during switching, preventing false Start/Stop detection on shared PCB planes. |
| Hardware write-protect | Dedicated WP pin with VCC/VSS logic-level enable - provides tamper-resistant configuration lock without software overhead or firmware vulnerability. |
| Page write capability | 16-byte buffer with auto-incrementing address pointer - reduces I²C transaction count by 16× versus byte writes, improving bus efficiency in bulk updates. |
| ESD robustness | ≥4,000 V HBM on all pins - meets industrial immunity requirements and survives handling without additional protection circuitry. |
Applications
| Smart Energy Metering | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing tariff tables, calibration coefficients, and event logs in utility-grade electricity meters operating continuously for 15+ years. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed >200-year data retention and 1M-cycle endurance under frequent metering updates. Use Value: Eliminates battery-backed SRAM; enables zero-maintenance field deployment with deterministic lifetime assurance. |
Use Scenario: Holding I/O mapping, PID tuning parameters, and safety thresholds in programmable logic controllers exposed to factory floor vibration and thermal cycling. IC Role / Device Role / Timing Role: Industrial-grade parameter store interfaced via isolated I²C bus, supporting write-protection during runtime to prevent accidental corruption. Use Value: Ensures deterministic boot behavior after power loss and prevents unauthorized configuration changes via hardware WP pin. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and fault history in AEC-Q100 qualified BCMs across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 qualified EEPROM providing secure, low-power nonvolatile storage for user preferences and diagnostics. Use Value: Meets automotive reliability standards while consuming only 1 µA standby current - extends battery life in always-on modules. |
Use Scenario: Archiving calibration constants, sensor offsets, and regulatory audit trails in FDA-cleared diagnostic devices requiring traceable, immutable settings. IC Role / Device Role / Timing Role: Tamper-evident configuration vault using hardware WP pin to lock critical parameters post-calibration. Use Value: Supports ISO 13485 compliance by enabling write-locking of calibrated values without software intervention or risk of overwrite. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA08T/SN | Wider VCC range (1.7V–5.5V); same 400 kHz max clock but de-rates to 100 kHz below 2.5V. | Supports battery-powered devices down to 1.7V; unsuitable where strict 2.5V min supply is enforced. | Select 24AA08T/SN only if system operates below 2.5V; otherwise 24LC08BT/SN offers tighter voltage spec and identical footprint. |
| AT24C08D-SSHM-T | Same 8-Kbit size, SOIC-8, and I²C interface; rated for 1M cycles but specifies 100-year retention (vs. >200 years). | Lacks extended temperature validation beyond industrial grade; no AEC-Q100 qualification. | Choose AT24C08D-SSHM-T for cost-sensitive consumer designs; retain 24LC08BT/SN for automotive or long-lifetime industrial use. |
Compared with 24AA08T/SN and AT24C08D-SSHM-T, the 24LC08BT/SN provides superior long-term data integrity (>200 years), AEC-Q100 qualification, and guaranteed 400 kHz operation across its full 2.5V–5.5V range - making it optimal for mission-critical industrial and automotive storage where retention and reliability are non-negotiable.
Availability
24LC08BT/SN is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC configuration, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 24LC08BT/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 memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 24LC08B family was designed specifically for reliable, low-power nonvolatile storage in space-constrained embedded systems - emphasizing write-protection, noise immunity, and extended data retention for industrial and automotive applications.
FAQ
What is the minimum VCC required for reliable operation of the 24LC08BT/SN?
The 24LC08BT/SN requires a minimum VCC of 2.5V for guaranteed operation across its full specification, including 400 kHz I²C communication, 5 ms write cycle timing, and industrial temperature range (–40°C to +85°C). Operation below 2.5V is not characterized and may result in undefined behavior or failure to acknowledge I²C transactions.
Does the 24LC08BT/SN support page writes across memory block boundaries?
No. The 24LC08BT/SN restricts page writes to within a single 16-byte physical page (e.g., addresses 0x00–0x0F). Attempting to write across a boundary (e.g., starting at 0x0E with 4 bytes) causes wraparound to the start of the same page, overwriting prior data. Software must enforce page alignment - the 24LC08BT/SN does not auto-segment writes across blocks.
How is write protection implemented on the 24LC08BT/SN, and what happens when WP is left unconnected?
Write protection on the 24LC08BT/SN is controlled exclusively by the WP pin: tied to VCC disables all write operations (read-only mode), while tied to VSS enables full read/write access. If left unconnected, WP floats high internally due to weak pull-up, resulting in unintended write protection - so VSS termination is mandatory for normal operation.
Can the 24LC08BT/SN be used in AEC-Q100 qualified automotive applications?
Yes. The 24LC08BT/SN is explicitly AEC-Q100 qualified for automotive applications, validated across the full industrial temperature range (–40°C to +85°C) and tested for reliability under thermal cycling, humidity, and vibration per AEC-Q100 stress test requirements - making it suitable for body control modules and dashboard systems.
What is the function of pins A0, A1, and A2 on the 24LC08BT/SN?
Pins A0, A1, and A2 on the 24LC08BT/SN have no internal connection and serve no functional purpose. They may be left floating, tied to VSS, or tied to VCC without affecting device operation, addressing, or I²C communication - unlike higher-density EEPROMs, the 24LC08B uses only fixed device address bits (1010) and block-select bits (B1/B0) for addressing.
24LC08BT/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC08BT/SN FAQ
1.How can I place an order for 24LC08BT/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BT/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 24LC08BT/SN reliable?
The price and inventory of 24LC08BT/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC08BT/SN is usually 5 days.
3.What payment methods are accepted for 24LC08BT/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BT/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BT/SN?
24LC08BT/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BT/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 24LC08BT/SN?
For technical support, including 24LC08BT/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BT/SN requirements.
6.How does Aetrix verify that 24LC08BT/SN is sourced from the original manufacturer or authorized distributors?
All 24LC08BT/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 24LC08BT/SN meets industry standards.
7.What is the process for return or replacement of 24LC08BT/SN?
All 24LC08BT/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BT/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 24LC08BT/SN part is unused and in its original packaging.
Return procedure for 24LC08BT/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08BT/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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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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