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Microchip Technology 24LC08BT-E/ST
- Part No.:
- 24LC08BT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC08BT-E/ST.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,134
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Product details
Overview
24LC08BT-E/ST from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating at 2.5V–5.5V with 400 kHz max clock frequency and industrial/extended temperature support (–40°C to +125°C). It features hardware write-protection via the WP pin, 16-byte page write buffer, and 1 µA standby current - deployed in embedded system configuration storage and sensor calibration data retention.
For engineers reviewing the 24LC08BT-E/ST datasheet, 24LC08BT-E/ST pinout, 24LC08BT-E/ST application, or 24LC08BT-E/ST equivalent, this page delivers verified electrical specs, SOIC-8 package mapping, I²C timing compliance (400 kHz @ VCC ≥ 2.5V), endurance (1M cycles), and real-world use cases in automotive body control modules and industrial PLC firmware parameter storage.
Technical Context
The 24LC08BT-E/ST implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and bus noise. Its internal architecture includes a 16-byte page latch, HV generator for EEPROM programming, and address pointer logic supporting current-address, random, and sequential read modes.
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 for A0–A2 pins across all packages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8), split into four 256-word blocks for isolated firmware/config partitioning |
| VCC Range | 2.5V–5.5V - compatible with 3.3V and 5V microcontroller I/O domains without level shifting |
| Max Clock Frequency | 400 kHz - supports high-speed I²C mode for faster parameter updates in real-time systems |
| Page Write Buffer | 16 bytes - enables burst writes within single physical page boundaries (0–15, 16–31, etc.) |
| Write Cycle Time | 5 ms maximum - deterministic erase/write latency critical for fail-safe logging sequences |
| Endurance | 1,000,000 erase/write cycles - ensures >10 years of daily 274-cycle operation in telemetry nodes |
| Data Retention | 200 years at 25°C - guarantees long-term integrity of calibration coefficients and security keys |
| Temp Range | –40°C to +125°C (Extended grade) - qualified for under-hood automotive and industrial motor drive environments |
Pinout & Package
24LC08BT-E/ST is supplied in 8-Lead SOIC (SN) package per Microchip drawing C04-057-SN Rev F, with standard 1.27 mm pitch, 3.90 mm body width, and JEDEC-compliant lead finish. Pin 1 is marked by notch or bevel on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS (Pin 4) | Ground reference | Return path for all internal logic and EEPROM array; must be low-impedance to prevent write corruption during power transients |
| SDA (Pin 5) | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz); carries addresses, data, and ACK/NACK signals |
| SCL (Pin 6) | Serial Clock input | Master-generated synchronous clock; rising edge samples SDA, falling edge drives SDA - defines I²C timing compliance window |
| WP (Pin 7) | Hardware Write-Protect | Logic-high = full-array write inhibit (000h–3FFh locked); logic-low = normal read/write; no function in CSP variants |
| VCC (Pin 8) | Power supply | 2.5V–5.5V tolerant; decoupling capacitor (100 nF ceramic) required within 10 mm for stable internal HV generation |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Noise immunity up to 50 ns spike suppression on SDA/SCL - eliminates false Start/Stop detection in EMI-heavy motor control environments |
| Output slope control | Controlled rise/fall times prevent ground bounce-induced bus contention during multi-drop I²C writes |
| Self-timed write cycle | Internal 5 ms timeout eliminates need for host polling delay - simplifies firmware and improves deterministic response |
| ESD protection | ≥4 kV HBM - meets IEC 61000-4-2 Level 3 for robustness in field-serviceable industrial interfaces |
| RoHS & AEC-Q100 | Qualified for automotive Grade 1 (–40°C to +125°C) - validated for body electronics, HVAC, and ADAS sensor modules |
Applications
| Automotive Body Control Unit | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing door lock actuator calibration offsets and seat position presets across vehicle lifetime. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during MCU boot and runtime reconfiguration. Use Value: 200-year data retention ensures factory-set values survive 15+ year vehicle service life without battery backup. | Use Scenario: Holding user-defined I/O mapping tables and PID tuning constants in modular automation controllers. IC Role / Device Role / Timing Role: Persistent configuration store updated only during commissioning or firmware upgrade - not during cyclic scan. Use Value: 1 million endurance cycles support >270 daily updates over 10 years, exceeding typical maintenance intervals. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Securing flow-rate calibration coefficients and safety-critical alarm thresholds against power loss. IC Role / Device Role / Timing Role: Tamper-resistant memory block write-protected via WP pin during normal operation. Use Value: Hardware WP prevents accidental overwrites during firmware updates - eliminating risk of corrupted dose delivery logic. | Use Scenario: Storing tariff schedules, meter ID, and cryptographic keys in utility-grade electricity meters. IC Role / Device Role / Timing Role: Secure nonvolatile storage accessible only by trusted host MCU during secure boot and key provisioning. Use Value: AEC-Q100 qualification ensures reliability under wide ambient swings (-40°C to +125°C) in outdoor meter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA08T-I/ST | Lower VCC min (1.7V), same 400 kHz speed, Industrial temp only (–40°C to +85°C) | Not rated for extended temperature operation; unsuitable for under-hood or high-ambient industrial use | Select when 3.3V/5V systems require wider voltage margin and extended temp is unnecessary |
| AT24C08D-SSHM-T | Same 8-Kbit size, 1 MHz I²C, 1.7V–5.5V, but no hardware WP pin; uses software write protection | Lacks dedicated WP pin - requires firmware-level lock enforcement, increasing attack surface in safety-critical apps | Choose for higher-speed I²C buses where software-controlled protection suffices and layout space is constrained |
Compared with 24LC08BT-E/ST, the 24AA08T-I/ST trades extended temperature support for lower-voltage operation, while AT24C08D-SSHM-T offers faster I²C but removes hardware write protection - making 24LC08BT-E/ST the only option combining AEC-Q100, WP pin, and +125°C rating in SOIC-8.
Availability
24LC08BT-E/ST is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 24LC08BT-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded, automotive, and industrial markets.
The 24LC08B family was designed for reliable, low-power nonvolatile storage in resource-constrained systems requiring I²C interface simplicity, hardware write protection, and extended temperature resilience.
FAQ
What is the maximum I²C clock frequency supported by the 24LC08BT-E/ST?
The 24LC08BT-E/ST supports up to 400 kHz I²C clock frequency when VCC is 2.5V or higher. This is specified in Microchip's DS20001710M datasheet Section 1.0 AC Characteristics. Operation below 2.5V is not supported for this variant, unlike the 24AA08. The 400 kHz rate enables efficient parameter updates in real-time control loops without bus congestion.
Does the 24LC08BT-E/ST have hardware write protection, and how is it implemented?
Yes, the 24LC08BT-E/ST includes a dedicated Write-Protect (WP) pin (Pin 7). When WP is tied to VCC, the entire 8-Kbit memory array (addresses 000h–3FFh) is locked against write operations while reads remain fully functional. When WP is tied to VSS, normal read/write access is enabled. This hardware-level lock operates independently of firmware and provides tamper resistance in safety-critical applications like medical devices.
What package type does the 24LC08BT-E/ST use, and what are its key mechanical dimensions?
The 24LC08BT-E/ST uses the 8-Lead SOIC (SN) package per Microchip drawing C04-057-SN Rev F: 3.90 mm body width, 4.90 mm length, 1.27 mm pitch, and 1.75 mm max molded thickness. It features standard gull-wing leads, matte tin finish, and JEDEC-compliant marking including "24LC08BT" and date code. This package is compatible with standard reflow profiles and automated optical inspection.
How many erase/write cycles can the 24LC08BT-E/ST endure, and what is its data retention period?
The 24LC08BT-E/ST is rated for 1,000,000 erase/write cycles at 25°C and 5.5V (page mode), with data retention exceeding 200 years under the same conditions. These values are guaranteed per Microchip's characterization testing in DS20001710M. Real-world endurance scales inversely with temperature and voltage - e.g., at 125°C and 2.5V, retention drops to ~10 years, still sufficient for most automotive applications.
Is the 24LC08BT-E/ST AEC-Q100 qualified, and for which automotive grade?
Yes, the 24LC08BT-E/ST is AEC-Q100 qualified for Grade 1 (–40°C to +125°C), as confirmed in the Device Selection Table and Package Types section of DS20001710M. This qualification covers stress tests including HTOL, TCT, ESD, and AC/DC parametric limits - validating its suitability for body electronics, climate control, and ADAS sensor modules where extended temperature operation is mandatory.
24LC08BT-E/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
24LC08BT-E/ST FAQ
1.How can I place an order for 24LC08BT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BT-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 24LC08BT-E/ST reliable?
The price and inventory of 24LC08BT-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 24LC08BT-E/ST is usually 5 days.
3.What payment methods are accepted for 24LC08BT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BT-E/ST?
24LC08BT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BT-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 24LC08BT-E/ST?
For technical support, including 24LC08BT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BT-E/ST requirements.
6.How does Aetrix verify that 24LC08BT-E/ST is sourced from the original manufacturer or authorized distributors?
All 24LC08BT-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 24LC08BT-E/ST meets industry standards.
7.What is the process for return or replacement of 24LC08BT-E/ST?
All 24LC08BT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BT-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 24LC08BT-E/ST part is unused and in its original packaging.
Return procedure for 24LC08BT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC08BT-E/ST Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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