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Microchip Technology 24LC08BHT-I/OT
- Part No.:
- 24LC08BHT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC08BHT-I/OT.pdf
- Description:
- IC EEPROM 8KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:21,741
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Product details
Overview
24LC08BHT-I/OT from Microchip Technology is an 8 Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 2.5V to 5.5V with industrial temperature range (–40°C to +85°C), 400 kHz max clock frequency, and hardware write-protect for memory addresses 200h–3FFh. It is used in embedded system configuration storage, sensor calibration data retention, and power-fail-safe parameter backup.
For engineers reviewing the 24LC08BHT-I/OT datasheet, 24LC08BHT-I/OT pinout, 24LC08BHT-I/OT application, or 24LC08BHT-I/OT equivalent, key selection criteria include VCC min (2.5V), page write buffer size (16 bytes), WP pin functionality, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The 24LC08BHT-I/OT implements a slave-only I²C interface with fixed 4-bit device code '1010', block-select addressing (B2–B0), and R/W bit control. Its internal address pointer auto-increments during sequential reads and page writes, supporting current-address, random, and sequential read modes.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to the upper half-array (200h–3FFh); tied to VSS, full array access is enabled. Schmitt-trigger inputs on SDA/SCL and input filtering suppress bus noise, enabling reliable operation in electrically noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (4 × 256 × 8-bit blocks), sufficient for firmware revision IDs, sensor offsets, and user-configurable settings. |
| VCC Operating Range | 2.5V to 5.5V - requires ≥2.5V supply; not compatible with 1.7V–2.4V systems like some 24AA08H variants. |
| Max Clock Frequency | 400 kHz at VCC ≥2.5V - supports fast I²C mode; drops to 100 kHz if VCC <2.5V (not applicable here). |
| Page Write Buffer | 16-byte buffer - enables efficient burst writes within a single physical page boundary (00h–0Fh, 10h–1Fh, etc.). |
| Write Cycle Time | 5 ms max - defines minimum inter-write interval; self-timed erase/write eliminates need for external timing control. |
| Endurance & Retention | 1 million erase/write cycles and >200 years data retention - suitable for long-life industrial deployments with infrequent updates. |
| ESD Protection | >4,000V HBM - provides robust handling during assembly and field service without additional protection circuitry. |
Pinout & Package
24LC08BHT-I/OT uses the 5-lead SOT-23 package (1.6 mm × 2.8 mm × 1.1 mm body), optimized for high-density PCBs. Pin 1 = SCL, Pin 2 = VSS, Pin 3 = SDA, Pin 4 = VCC, Pin 5 = WP. A0/A1/A2 pins are unconnected and may be left floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL (Pin 1) | Serial Clock input | Master-generated clock synchronizing all I²C transfers; requires external pull-up resistor. |
| VSS (Pin 2) | Ground reference | Return path for all internal logic and I/O; must be low-impedance connection to system ground plane. |
| SDA (Pin 3) | Bidirectional data line | Open-drain I/O requiring external pull-up; carries addresses, commands, and data; changes only during SCL low. |
| VCC (Pin 4) | Power supply | 2.5V–5.5V input; bypass capacitor (0.1 µF) recommended near pin for noise suppression. |
| WP (Pin 5) | Hardware write-protect control | Logic-high (VCC) enables half-array protection (200h–3FFh); logic-low (VSS) enables full-array write access. |
Key Features
| Feature | Design Value |
|---|---|
| Half-array hardware write-protect | Prevents accidental overwrite of critical calibration or security data stored in upper 2 Kbytes (200h–3FFh) without software intervention. |
| Schmitt-trigger inputs with spike filtering | Eliminates need for external RC filters on SDA/SCL lines, reducing BOM count and improving noise immunity in motor-drive or power-conversion environments. |
| 16-byte page write buffer | Reduces I²C transaction overhead by up to 16× vs. byte writes - critical for time-sensitive firmware update sequences. |
| Self-timed erase/write cycle | Removes requirement for host MCU to poll status or manage timing delays, simplifying driver implementation and freeing CPU cycles. |
| Industrial temperature rating | Guaranteed operation from –40°C to +85°C - validated for use in outdoor metering, factory automation, and HVAC control units. |
Applications
| Smart Energy Metering | Industrial PLC I/O Module |
|---|---|
Use Scenario: Storing tariff schedules, pulse-count history, and tamper-event logs in electricity/water/gas meters exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Nonvolatile configuration and event-log storage with guaranteed data integrity across power cycles and thermal stress. Use Value: >200-year data retention and 1M endurance ensure lifetime logging without replacement in sealed utility-grade enclosures. | Use Scenario: Holding module identification, calibration coefficients, and fault-history records in DIN-rail mounted programmable logic controller I/O cards. IC Role / Device Role / Timing Role: Persistent parameter storage accessible over I²C during runtime and after cold boot; WP pin secures factory-set values. Use Value: Hardware write-protect prevents field technicians from inadvertently overwriting calibrated sensor offsets during maintenance. |
| Medical Diagnostic Sensor Hub | Automotive Body Control Module (BCM) |
Use Scenario: Saving patient-specific calibration profiles and usage counters in portable ultrasound or ECG sensor hubs requiring FDA-compliant traceability. IC Role / Device Role / Timing Role: Secure, low-power nonvolatile memory for audit-trail data and regulatory compliance records. Use Value: ESD >4 kV and industrial temp rating support safe handling and operation in clinical environments with static-prone surfaces. | Use Scenario: Storing seat-position presets, mirror-angle configurations, and lighting profiles in automotive BCMs where space is constrained. IC Role / Device Role / Timing Role: Compact, I²C-accessible memory for user-customizable settings retained across ignition cycles. Use Value: SOT-23-5 footprint minimizes PCB area while delivering reliable 8 Kbit storage in vibration-prone under-hood locations. |
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/SN | SOIC-8 package (4.9 mm × 3.9 mm), same electrical specs and temperature grade. | Requires larger PCB area; better thermal dissipation and hand-solderability than SOT-23. | Select when board layout allows SOIC footprint and manual rework is preferred. |
| AT24C08D-SSHM-T | Same 8 Kbit capacity, 2.5V–5.5V VCC, but rated for 1 MHz I²C and offers 128-byte page buffer. | Higher speed and larger page buffer suit high-throughput logging; no half-array WP - full-array protection only. | Select when faster write throughput is required and hardware-level partial write-protection is not mandatory. |
Compared with 24LC08BHT-I/OT, the 24LC08B-I/SN offers identical functionality in a larger, more serviceable package, while the AT24C08D-SSHM-T trades half-array write-protection for higher-speed operation and larger page buffering - making it suitable for data-acquisition systems needing rapid burst writes.
Availability
24LC08BHT-I/OT is available at Aetrix Electronics and suitable for smart metering, industrial PLC modules, medical sensor hubs, and automotive body control units requiring stable component supply across extended product lifecycles.
Supply support for 24LC08BHT-I/OT 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 manufacturer specializing in microcontrollers, analog devices, and memory products, with global design, manufacturing, and support infrastructure.
The 24LC08BHT-I/OT belongs to Microchip's 24LCxxBH family of I²C serial EEPROMs, designed specifically for industrial and automotive applications demanding robustness, low-voltage operation, and hardware-based data protection.
FAQ
What is the minimum supply voltage required for reliable operation of the 24LC08BHT-I/OT?
The 24LC08BHT-I/OT requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Unlike the 24AA08H variant, it is not rated for 1.7V operation. Below 2.5V, functionality is not assured, and I²C communication may fail or produce unpredictable behavior. Always verify system rail stability under load before deployment.
Does the 24LC08BHT-I/OT support standard I²C addressing, and how many devices can share the same bus?
Yes, the 24LC08BHT-I/OT uses the standard I²C 7-bit address format with fixed 4-bit control code '1010'. The remaining 3 bits (B2–B0) serve as block-select bits, allowing access to four 256-word memory blocks. Since A0/A1/A2 pins are unconnected and unused, only one 24LC08BHT-I/OT can reside on a given I²C bus unless external multiplexing is added - unlike EEPROMs with configurable address pins.
How does the WP pin function on the 24LC08BHT-I/OT, and what happens when it is left floating?
The WP pin on the 24LC08BHT-I/OT must be actively driven to either VCC (to enable half-array write-protection for addresses 200h–3FFh) or VSS (to allow full-array writes). Leaving WP floating is undefined and may result in intermittent or unreliable write protection behavior due to noise coupling. Microchip specifies that WP is a CMOS input with no internal pull-up/down, so external biasing is mandatory for deterministic operation.
Can the 24LC08BHT-I/OT perform page writes across memory boundaries, and what occurs if it does?
No - page writes on the 24LC08BHT-I/OT are strictly confined within 16-byte physical pages (e.g., 00h–0Fh, 10h–1Fh). Attempting a page write that crosses a boundary causes automatic address wraparound to the start of the current page, overwriting previously loaded data. Application firmware must validate starting address and byte count to prevent unintended data corruption during multi-byte writes.
Is the 24LC08BHT-I/OT RoHS compliant and lead-free?
Yes, the 24LC08BHT-I/OT is RoHS compliant and manufactured with lead-free terminations. Per Microchip's packaging documentation, the SOT-23-5 variant uses matte tin (Sn) plating per JEDEC standards, and all materials meet EU Directive 2011/65/EU requirements. Full compliance documentation, including substance declarations, is available through Microchip's Quality portal upon request.
24LC08BHT-I/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24LC08BHT-I/OT FAQ
1.How can I place an order for 24LC08BHT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BHT-I/OT 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-I/OT reliable?
The price and inventory of 24LC08BHT-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC08BHT-I/OT is usually 5 days.
3.What payment methods are accepted for 24LC08BHT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BHT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BHT-I/OT?
24LC08BHT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BHT-I/OT 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-I/OT?
For technical support, including 24LC08BHT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BHT-I/OT requirements.
6.How does Aetrix verify that 24LC08BHT-I/OT is sourced from the original manufacturer or authorized distributors?
All 24LC08BHT-I/OT 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-I/OT meets industry standards.
7.What is the process for return or replacement of 24LC08BHT-I/OT?
All 24LC08BHT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BHT-I/OT, 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-I/OT part is unused and in its original packaging.
Return procedure for 24LC08BHT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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