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Microchip Technology 24LC08BHT-I/ST
- Part No.:
- 24LC08BHT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
24LC08BHT-I/ST.pdf
- Description:
- IC EEPROM 8KBIT I2C 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,072
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Product details
Overview
24LC08BHT-I/ST from Microchip Technology Inc. is an 8 Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit memory 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 the upper half-array (200h–3FFh). It enables nonvolatile data storage in space-constrained embedded control systems.
For engineers reviewing the 24LC08BHT-I/ST datasheet, 24LC08BHT-I/ST pinout, 24LC08BHT-I/ST application, or 24LC08BHT-I/ST equivalent, key selection criteria include VCC min (2.5V), page write buffer size (16 bytes), WP-enabled half-array protection, I²C timing compliance (400 kHz), and TSSOP-8 package compatibility with standard PCB footprints.
Technical Context
The 24LC08BHT-I/ST implements a slave-only I²C interface with fixed 7-bit device 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 implemented via the WP pin: tied to VCC, it disables writes to addresses 200h–3FFh while permitting full read access; tied to VSS, full read/write operation is enabled. 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 (four 256 × 8-bit blocks), enabling compact firmware parameter or calibration storage |
| VCC Operating Range | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level shifting |
| Max Clock Frequency | 400 kHz - supports high-speed I²C mode for reduced transaction latency in real-time systems |
| Page Write Buffer | 16 bytes - minimizes I²C bus occupancy during multi-byte updates versus byte-write mode |
| Write Endurance | 1 million cycles - ensures long-term reliability in logging or configuration update applications |
| Data Retention | 200 years - guarantees persistent storage integrity across product lifecycle without refresh |
| ESD Protection | >4 kV HBM - provides robust handling margin during board assembly and field service |
Pinout & Package
24LC08BHT-I/ST is supplied in an 8-lead TSSOP (4.4 mm body) package, RoHS-compliant, with 0.65 mm lead pitch and exposed pad optional per Microchip packaging spec. Pin 1 is A0 (NC), Pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | No-connect (NC) | Internally unconnected; may be left floating or tied to VSS/VCC with no functional impact |
| VSS | Ground reference | Common return path for all I/O and core logic; requires low-impedance PCB connection |
| SDA | Serial data bidirectional I/O | Open-drain output requiring external pull-up (2 kΩ for 400 kHz); carries address/data/control bits |
| SCL | Serial clock input | Master-generated synchronous timing signal; Schmitt-triggered for noise rejection |
| WP | Hardware write-protect enable | Logic-high (VCC) disables writes to 200h–3FFh; logic-low (VSS) enables full array access |
| VCC | Power supply | 2.5–5.5V input; must be decoupled with ≥0.1 µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Half-array hardware write-protect | Prevents accidental overwrites of critical calibration or security data stored in upper 2 Kbytes (200h–3FFh) |
| 16-byte page write buffer | Reduces I²C bus utilization by up to 94% vs. byte-write for 16-byte updates, improving system responsiveness |
| Schmitt-trigger inputs on SDA/SCL | Eliminates false Start/Stop detection on noisy industrial buses without external filtering components |
| Self-timed write cycle | Removes need for external delay timers or polling overhead - host proceeds after Stop condition |
| 1 μA max standby current | Enables ultra-low-power operation in battery-backed or energy-harvesting systems |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed at power-up and during field recalibration via I²C master controller. Use Value: Ensures measurement accuracy across temperature and lifetime without requiring external NVRAM or microcontroller flash partitioning. | Use Scenario: Holding user-configurable therapy parameters (e.g., dosage limits, alarm thresholds) in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store with WP-enabled protection of safety-critical upper memory region. Use Value: Prevents unauthorized modification of life-safety settings while allowing clinical staff to update operational parameters. |
| Automotive Body Control Module EEPROM | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Recording door lock actuation counts, mirror position presets, and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: Low-power, AEC-Q100-qualified (E-temp variant available) serial EEPROM interfaced to 8-bit MCU over I²C. Use Value: Provides reliable, high-endurance storage for infrequently updated but mission-critical vehicle personalization data. | Use Scenario: Storing field-deployed firmware patches and metering algorithm updates in utility-grade smart meters. IC Role / Device Role / Timing Role: Secure boot-time configuration store with write-protection preventing corruption during brown-out conditions. Use Value: Enables safe over-the-air updates without risk of bricking the device due to partial write failures. |
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/ST | No tape-and-reel suffix; identical electrical specs and TSSOP-8 package | Same functionality; differs only in packaging format (bulk vs. reel) | Select 24LC08BHT-I/ST for automated SMT assembly; use 24LC08B-I/ST for manual prototyping or low-volume builds |
| AT24C08D-SSHM-T | 1.7–5.5V VCC range, 1 MHz max clock, 128-byte page buffer, different I²C address mapping | Broader voltage support and faster timing, but requires firmware adaptation for address and page boundary handling | Choose AT24C08D-SSHM-T only when 1.7V operation or higher throughput is mandatory and layout changes are acceptable |
Compared with 24LC08BHT-I/ST, the 24LC08B-I/ST offers identical performance in a non-reel format, while the AT24C08D-SSHM-T extends voltage range and speed at the cost of firmware compatibility and requires validation of WP behavior and page wrap logic.
Availability
24LC08BHT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 24LC08BHT-I/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, FPGA, and memory solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and development tools.
The 24LC08BHT-I/ST belongs to Microchip's 24LCxxH family of I²C serial EEPROMs, designed specifically for reliable, low-power, pin-efficient nonvolatile storage in resource-constrained embedded systems.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24LC08BHT-I/ST?
The 24LC08BHT-I/ST requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Below 2.5V, the device is not specified - unlike the 24AA08H variant which supports down to 1.7V. This threshold ensures proper internal voltage regulation and EEPROM cell programming margins.
Does the 24LC08BHT-I/ST support standard I²C addressing, and what is its 7-bit device address?
Yes, the 24LC08BHT-I/ST uses standard I²C addressing with a fixed 4-bit control code '1010' followed by three block-select bits (B2–B0) and the R/W bit. Its base 7-bit address is 0x50 (1010000b) when all block-select bits are zero. A0–A2 pins are NC and do not affect addressing - unlike some other EEPROM families.
How does hardware write-protection work on the 24LC08BHT-I/ST, and which memory region does it protect?
When the WP pin of the 24LC08BHT-I/ST is tied to VCC, writes to memory addresses 200h–3FFh (upper 2 Kbits) are disabled; reads remain fully functional. Addresses 000h–1FFh (lower 2 Kbits) remain writable. When WP is tied to VSS, full read/write access to the entire 8 Kbit array is enabled. No software command is needed - protection is purely hardware-based.
What is the maximum number of bytes that can be written in a single page write operation for the 24LC08BHT-I/ST?
The 24LC08BHT-I/ST supports a 16-byte page write buffer. A single page write operation can transfer up to 16 bytes starting from any address aligned to a 16-byte boundary (e.g., 000h, 010h, 020h). Writing across a page boundary causes wraparound within the same page - not continuation into the next - so firmware must enforce alignment or split writes accordingly.
Is the 24LC08BHT-I/ST RoHS-compliant and qualified for industrial temperature operation?
Yes, the 24LC08BHT-I/ST is RoHS-compliant and rated for industrial temperature operation from –40°C to +85°C, as indicated by the 'I' suffix in its part number. It meets JEDEC standards for moisture sensitivity level (MSL) and is qualified per Microchip's industrial reliability test flow, including HTOL and ESD testing (>4 kV HBM).
24LC08BHT-I/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:
- 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:
- 8-TSSOP
24LC08BHT-I/ST FAQ
1.How can I place an order for 24LC08BHT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC08BHT-I/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 24LC08BHT-I/ST reliable?
The price and inventory of 24LC08BHT-I/ST 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/ST is usually 5 days.
3.What payment methods are accepted for 24LC08BHT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC08BHT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC08BHT-I/ST?
24LC08BHT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC08BHT-I/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 24LC08BHT-I/ST?
For technical support, including 24LC08BHT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC08BHT-I/ST requirements.
6.How does Aetrix verify that 24LC08BHT-I/ST is sourced from the original manufacturer or authorized distributors?
All 24LC08BHT-I/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 24LC08BHT-I/ST meets industry standards.
7.What is the process for return or replacement of 24LC08BHT-I/ST?
All 24LC08BHT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 24LC08BHT-I/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 24LC08BHT-I/ST part is unused and in its original packaging.
Return procedure for 24LC08BHT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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