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Microchip Technology 24LC08BHT-E/MS
- Part No.:
- 24LC08BHT-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24LC08BHT-E/MS.pdf
- Description:
- IC EEPROM 8KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,145
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Product details
Overview
24LC08BHT-E/MS 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-protect for memory addresses 200h–3FFh. It targets embedded system configuration storage, sensor calibration data retention, and industrial control parameter backup.
For engineers reviewing the 24LC08BHT-E/MS datasheet, 24LC08BHT-E/MS pinout, 24LC08BHT-E/MS application, or 24LC08BHT-E/MS equivalent, key selection criteria include VCC min (2.5V), automotive temperature range (–40°C to +125°C), half-array write-protection behavior, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The 24LC08BHT-E/MS implements a slave-only I²C interface with fixed 7-bit address prefix '1010', block-select addressing via B2–B0 bits (B2 unused), and Schmitt-triggered SDA/SCL inputs for noise immunity. Its internal address pointer auto-increments during sequential reads and wraps within 16-byte physical pages.
Write protection is controlled solely by the WP pin: tied to VCC disables writes to addresses 200h–3FFh while permitting full read access; tied to VSS enables full read/write. The device uses self-timed erase/write cycles with no external timing components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (4 × 256 × 8-bit blocks), enabling compact nonvolatile storage for firmware flags and calibration coefficients |
| VCC operating range | 2.5V to 5.5V - supports direct connection to 3.3V or 5V logic rails without level shifting |
| Max clock frequency | 400 kHz at VCC ≥ 2.5V - delivers up to 400 kbps effective throughput in standard-mode I²C systems |
| Page write buffer | 16 bytes - reduces bus transactions by up to 16× versus byte-write for contiguous data updates |
| Endurance | 1 million erase/write cycles - ensures reliable operation over 10+ years in daily-configurable industrial nodes |
| Data retention | 200 years at +25°C - guarantees long-term integrity of stored calibration or security keys |
| ESD protection | >4,000V HBM - withstands handling and board-level ESD events without latch-up or parametric shift |
Pinout & Package
24LC08BHT-E/MS is housed in an 8-pin MSOP package (3.0 mm × 3.0 mm × 1.0 mm body height) with exposed pad option not specified. Pin 1 is A0 (no internal connection); pins 2–3 are A1/A2 (unconnected); pin 4 is VSS (ground reference); pin 5 is SDA (bidirectional open-drain I²C data line requiring external pull-up); pin 6 is SCL (input-only I²C clock); pin 7 is WP (active-high write-protect control); pin 8 is VCC (power supply input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | No-connect | Internally unconnected; may be left floating or tied to VSS/VCC without functional impact |
| A1 | No-connect | Internally unconnected; no effect on addressing or operation |
| A2 | No-connect | Internally unconnected; does not participate in device addressing |
| VSS | Ground reference | Primary return path for all internal circuitry; must be low-impedance connection to system ground plane |
| SDA | I²C bidirectional data line | Open-drain output requires external pull-up resistor (2 kΩ typical for 400 kHz); changes only during SCL low |
| SCL | I²C clock input | Master-generated synchronous clock; edge-sensitive input with Schmitt trigger for noise rejection |
| WP | Write-protect enable | High = write-disable for addresses 200h–3FFh; low = full read/write access; no pull-up/pull-down required |
| VCC | Power supply | Supplies core logic and EEPROM array; bypass capacitor (0.1 µF ceramic) recommended near pin |
Key Features
| Feature | Design Value |
|---|---|
| Half-array hardware write-protect | WP pin directly gates write access to upper 2 Kbytes (200h–3FFh), eliminating need for software lock bits or firmware overhead |
| 16-byte page write buffer | Reduces I²C transaction count by factor of 16 for burst writes, lowering bus arbitration latency and master CPU load |
| Schmitt-trigger inputs on SDA/SCL | Provides 50 mV hysteresis (0.05 × VCC) to reject sub-50 ns noise spikes, ensuring robust operation in electrically noisy environments |
| Self-timed write cycle | Eliminates requirement for external delay timers or polling loops - host can issue ACK polling immediately after STOP |
| Automotive temperature grade | Qualified from –40°C to +125°C per AEC-Q100 stress test conditions, supporting under-hood and powertrain applications |
Applications
| Industrial PLC Configuration Storage | Automotive Sensor Calibration Data Retention |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent state across power cycles and firmware updates. Use Value: Enables zero-downtime field reconfiguration without battery-backed SRAM or external backup power circuitry. | Use Scenario: Holding factory-trimmed offset/gain coefficients for pressure, temperature, and position sensors in engine control modules. IC Role / Device Role / Timing Role: Calibration data vault accessed once at startup; write-protected during runtime to prevent corruption. Use Value: WP pin hardens against accidental overwrites during CAN diagnostics or flash programming sequences. |
| Medical Device Parameter Backup | Smart Energy Meter Firmware Flags |
Use Scenario: Saving user-adjusted therapy settings (e.g., infusion rate limits, alarm volumes) in portable infusion pumps with strict regulatory data integrity requirements. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store with 200-year data retention validated per IEC 62304. Use Value: Meets Class C software safety requirements by decoupling critical settings from volatile RAM and main MCU flash. | Use Scenario: Recording tariff schedules, metering event logs, and firmware update status flags in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: High-endurance event logger interfacing via I²C to metrology SoC with minimal GPIO usage. Use Value: 1M-cycle endurance supports daily logging for >27 years without wear leveling or garbage collection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24LC08B-I/MS | Industrial temp range (–40°C to +85°C) vs. automotive (–40°C to +125°C); identical electrical specs and pinout | Not qualified for under-hood or powertrain locations requiring AEC-Q100 Grade 1 | Select 24LC08BHT-E/MS when operating ambient exceeds +85°C or automotive qualification is mandated |
| AT24C08D-MAHM-T | Same 8 Kbit capacity, 2.5–5.5V VCC, but supports 1 MHz Fast Mode Plus; different pinout (SOIC-8 only) | Lacks hardware write-protect; relies on software lock mechanisms and page write disable commands | Choose AT24C08D-MAHM-T only if higher-speed I²C (1 MHz) is required and WP functionality is implemented in firmware |
Compared with 24LC08B-I/MS, the 24LC08BHT-E/MS adds automotive-grade reliability and extended temperature margin; compared with AT24C08D-MAHM-T, it provides deterministic hardware-based write protection but operates at lower maximum I²C speed.
Availability
24LC08BHT-E/MS is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive sensor calibration data retention, and medical device parameter backup requiring stable component supply across extended product lifecycles.
Supply support for 24LC08BHT-E/MS 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 operations.
The 24LC08BHT-E/MS belongs to Microchip's legacy I²C EEPROM product line, engineered specifically for high-reliability, low-power, and space-constrained embedded systems requiring guaranteed data integrity over decades.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24LC08BHT-E/MS?
The 24LC08BHT-E/MS requires a minimum VCC of 2.5V for guaranteed operation across its full automotive temperature range (–40°C to +125°C). Below 2.5V, the device is not characterized - unlike the 24AA08H variant which supports down to 1.7V. This 2.5V threshold ensures stable EEPROM programming margins and I²C signal integrity under worst-case thermal and voltage conditions. Always verify VCC remains ≥2.5V during all operational modes including write cycles.
How does the WP pin function on the 24LC08BHT-E/MS, and what memory region does it protect?
The WP pin on the 24LC08BHT-E/MS is an active-high hardware write-protect input. When tied to VCC, it disables write operations to memory addresses 200h–3FFh (the upper 2 Kbytes), while allowing full read access to the entire 8 Kbit array. When tied to VSS, all addresses (000h–3FFh) are writable. This protection is implemented entirely in hardware - no firmware intervention or command sequence is needed. The 24LC08BHT-E/MS does not support software write protection.
Can the 24LC08BHT-E/MS perform page writes across multiple 16-byte boundaries?
No, the 24LC08BHT-E/MS cannot perform page writes across 16-byte physical page boundaries. If a page write command attempts to write past the end of the current page (e.g., starting at address 00Fh and writing 16 bytes), the address counter wraps around to the start of that same page (000h), overwriting previously loaded data. Application firmware must explicitly split multi-page writes into aligned 16-byte chunks. This behavior is inherent to the on-chip page buffer architecture and is documented in Figure 4-2 of the DS20002084B datasheet.
What is the maximum I²C clock frequency supported by the 24LC08BHT-E/MS, and under what conditions?
The 24LC08BHT-E/MS supports a maximum I²C clock frequency of 400 kHz when VCC is between 2.5V and 5.5V, across its full automotive temperature range (–40°C to +125°C). This is Standard Mode Plus speed - not Fast Mode Plus (1 MHz). The device does not support clock rates above 400 kHz, and operation at 100 kHz is only required below 2.5V (which is outside its specified VCC range). System designers must ensure SCL rise/fall times meet AC specs (TR/TF ≤ 300 ns at 2.5V–5.5V) using appropriate pull-up resistors.
Is the 24LC08BHT-E/MS pin-compatible with other Microchip 8 Kbit I²C EEPROMs in MSOP-8 packaging?
Yes, the 24LC08BHT-E/MS is pin-compatible with other Microchip 8 Kbit I²C EEPROMs offered in MSOP-8 packages, including the 24AA08HT-I/MS and 24LC08B-I/MS. All share identical pin assignments: A0/A1/A2 (no-connect), VSS, SDA, SCL, WP, and VCC in pins 1–8 respectively. However, voltage range (1.7V vs. 2.5V min), temperature grade (industrial vs. automotive), and marking differ - so electrical and qualification compatibility must be verified per application requirements before substitution.
24LC08BHT-E/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not 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-MSOP
24LC08BHT-E/MS FAQ
1.How can I place an order for 24LC08BHT-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BHT-E/MS 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 24LC08BHT-E/MS reliable?
The price and inventory of 24LC08BHT-E/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC08BHT-E/MS is usually 5 days.
3.What payment methods are accepted for 24LC08BHT-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BHT-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BHT-E/MS?
24LC08BHT-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BHT-E/MS 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 24LC08BHT-E/MS?
For technical support, including 24LC08BHT-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BHT-E/MS requirements.
6.How does Aetrix verify that 24LC08BHT-E/MS is sourced from the original manufacturer or authorized distributors?
All 24LC08BHT-E/MS 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 24LC08BHT-E/MS meets industry standards.
7.What is the process for return or replacement of 24LC08BHT-E/MS?
All 24LC08BHT-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BHT-E/MS, 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 24LC08BHT-E/MS part is unused and in its original packaging.
Return procedure for 24LC08BHT-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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