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Microchip Technology 24LC04BHT-I/MS
- Part No.:
- 24LC04BHT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24LC04BHT-I/MS.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,747
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Product details
Overview
24LC04BHT-I/MS from Microchip Technology Inc. is a 4-Kbit I²C-compatible serial EEPROM organized as two 256 × 8-bit blocks, operating from 2.5V to 5.5V with 400 kHz max clock frequency, 1 µA standby current, and hardware write-protect for the upper half-array (100h–1FFh). It is used in embedded systems for storing calibration data, configuration settings, and firmware parameters.
For engineers reviewing the 24LC04BHT-I/MS datasheet, 24LC04BHT-I/MS pinout, 24LC04BHT-I/MS application, or 24LC04BHT-I/MS equivalent, this page delivers verified electrical specs, MSOP-8 package details, I²C timing constraints, endurance (1M cycles), and real-world use cases in industrial control, automotive subsystems, and IoT edge nodes.
Technical Context
The 24LC04BHT-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address counter supports current-address, random, and sequential read modes, while the 16-byte page buffer enables efficient burst writes.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to addresses 100h–1FFh; tied to VSS, full-array access is enabled. The device uses self-timed erase/write cycles with 5 ms maximum page write time and supports ACK polling to detect write completion without fixed delays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 bytes), organized as two independent 256 × 8-bit blocks for flexible addressing |
| Supply Voltage | 2.5V to 5.5V - compatible with standard 3.3V and 5V logic rails; not operable below 2.5V |
| Max Clock Frequency | 400 kHz - supports high-speed I²C mode; no 1 MHz capability (reserved for 24FC04H) |
| Write Endurance | 1,000,000 cycles - ensures long-term reliability in frequent-update applications like sensor calibration storage |
| Data Retention | 200 years - guarantees nonvolatile data integrity over extended product lifecycles |
| Standby Current | 1 µA at I-temp (−40°C to +85°C) - enables ultra-low-power operation in battery-backed systems |
| Page Write Buffer | 16 bytes - reduces bus transactions for multi-byte updates and improves write throughput |
Pinout & Package
24LC04BHT-I/MS is housed in an 8-lead MSOP (Mini Small Outline Package) with 3.0 mm × 3.0 mm body, 0.65 mm pitch, and exposed pad option (not electrically connected). Pin 1 is marked by a beveled corner or dot; pins A0–A2 are unconnected internally and may be left floating or tied to VSS/VCC without effect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1, A2 | Address Input (NC) | No internal connection; unused for 24LC04BH family - no device addressing function |
| VSS | Ground Reference | Primary return path for all internal circuits; must be low-impedance to ensure noise immunity |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ typical for 400 kHz); carries address, data, and ACK signals |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; determines timing of all I²C transfers |
| WP | Write-Protect Control | Logic-high (VCC) enables half-array protection (100h–1FFh); logic-low (VSS) enables full-array write access |
| VCC | Power Supply | Single 2.5–5.5V supply powering EEPROM core, interface logic, and charge pump for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | 5% hysteresis (0.05×VCC) on SDA/SCL - rejects sub-50 ns noise spikes and ensures robust bus operation in EMI-prone environments |
| Output slope control | Controlled rise/fall times - eliminates ground bounce during switching, critical for mixed-signal PCB layouts |
| Hardware write-protect | Dedicated WP pin enabling selective lock of upper 2 Kbit block - prevents accidental firmware corruption without software overhead |
| 100 kHz / 400 kHz compatibility | Supports standard and fast-mode I²C - interoperable with legacy and modern microcontrollers without protocol translation |
| ACK polling support | Host can detect write completion via repeated control-byte transmission - eliminates fixed 5 ms delays and maximizes bus utilization |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in factory automation equipment. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up and recalibration routines via I²C; no real-time timing constraints. Use Value: Enables field-replaceable sensor modules with persistent calibration data across power cycles and firmware updates. |
Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration in vehicle door modules. IC Role / Device Role / Timing Role: I²C slave EEPROM interfacing with 8-bit MCU; accessed during wake-up and user input events. Use Value: Provides AEC-Q100 qualified, 1M-cycle endurance storage for user preferences without MCU flash wear. |
| IoT Edge Node Configuration | Medical Device Setup Parameters |
|
Use Scenario: Saving Wi-Fi credentials, OTA update flags, and sensor sampling intervals in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power I²C EEPROM with 1 µA standby current; written infrequently, read at boot and on command. Use Value: Extends coin-cell battery life beyond 5 years while retaining critical network and operational settings. |
Use Scenario: Storing FDA-mandated device ID, calibration history, and usage counters in portable diagnostic tools. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory with write-protect for regulatory audit logs. Use Value: Ensures traceability and compliance via hardware-enforced write protection of critical medical records. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04HT-I/MS | Lower VCC min (1.7V), same 400 kHz max, identical pinout and memory map | Better suited for 1.8V systems; not rated for 2.5V-only operation | Select when operating below 2.5V; avoid if system VCC never drops below 2.5V |
| AT24C04-MAHM-T | Same 4-Kbit size, 1.8–5.5V range, 400 kHz, but lacks half-array write-protect (full-array or none) | Requires software-based protection; no hardware WP pin functionality | Choose only if write-protect granularity is unnecessary and Atmel/Dialog sourcing is preferred |
Compared with 24LC04BHT-I/MS, the 24AA04HT-I/MS offers wider voltage flexibility but identical packaging and timing, while the AT24C04-MAHM-T trades hardware write-protect for broader voltage support and different endurance specs - making the 24LC04BHT-I/MS optimal where deterministic half-array protection is required in 2.5–5.5V industrial designs.
Availability
24LC04BHT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and IoT edge node configuration requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 24LC04BHT-I/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 infrastructure.
The 24LC04BHT-I/MS belongs to Microchip's 24XX04H family of I²C EEPROMs, designed specifically for reliable, low-power nonvolatile storage in space-constrained industrial, automotive, and consumer applications where hardware write-protect and AEC-Q100 qualification matter.
FAQ
What is the minimum operating voltage for 24LC04BHT-I/MS?
The 24LC04BHT-I/MS requires a minimum supply voltage of 2.5V and operates up to 5.5V. Unlike the 24AA04H variant, it is not specified for operation below 2.5V - attempting to power it at 1.8V will result in undefined behavior or failure to respond on the I²C bus. This voltage range aligns with standard 3.3V and 5V system rails.
Does 24LC04BHT-I/MS support 1 MHz I²C clock speed?
No, the 24LC04BHT-I/MS supports a maximum clock frequency of 400 kHz. The 1 MHz capability is exclusive to the 24FC04H variant within the same family. Using 24LC04BHT-I/MS at 1 MHz violates its AC specifications and may cause communication failures, missed ACKs, or corrupted writes.
How does the write-protect feature work on 24LC04BHT-I/MS?
The WP pin on 24LC04BHT-I/MS enables hardware-level protection: when tied to VCC, writes to memory addresses 100h–1FFh (upper 2 Kbit block) are inhibited while reads remain functional; when tied to VSS, full-array write access is enabled. This is implemented entirely in silicon - no firmware or configuration register is involved.
What is the endurance rating of 24LC04BHT-I/MS?
The 24LC04BHT-I/MS is rated for 1,000,000 erase/write cycles per memory location under standard conditions (25°C, 5.5V). This endurance is validated in page-write mode and ensures reliable operation in applications requiring frequent updates, such as logging or calibration storage, over multi-year product lifetimes.
Is 24LC04BHT-I/MS AEC-Q100 qualified?
Yes, the 24LC04BHT-I/MS is AEC-Q100 qualified for automotive applications. Its "I" temperature grade (−40°C to +85°C) and qualification testing cover stress tests including HTOL, TCT, and ESD, making it suitable for use in body electronics, infotainment interfaces, and other non-safety-critical automotive subsystems.
24LC04BHT-I/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:
- 4Kbit
- Memory Organization:
- 256 x 8 x 2
- 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-MSOP
24LC04BHT-I/MS FAQ
1.How can I place an order for 24LC04BHT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BHT-I/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 24LC04BHT-I/MS reliable?
The price and inventory of 24LC04BHT-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC04BHT-I/MS is usually 5 days.
3.What payment methods are accepted for 24LC04BHT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BHT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BHT-I/MS?
24LC04BHT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BHT-I/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 24LC04BHT-I/MS?
For technical support, including 24LC04BHT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BHT-I/MS requirements.
6.How does Aetrix verify that 24LC04BHT-I/MS is sourced from the original manufacturer or authorized distributors?
All 24LC04BHT-I/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 24LC04BHT-I/MS meets industry standards.
7.What is the process for return or replacement of 24LC04BHT-I/MS?
All 24LC04BHT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BHT-I/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 24LC04BHT-I/MS part is unused and in its original packaging.
Return procedure for 24LC04BHT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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