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Microchip Technology 24LC04BHT-I/OT
- Part No.:
- 24LC04BHT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC04BHT-I/OT.pdf
- Description:
- IC EEPROM 4KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,225
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Product details
Overview
24LC04BHT-I/OT 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/OT datasheet, 24LC04BHT-I/OT pinout, 24LC04BHT-I/OT application, or 24LC04BHT-I/OT equivalent, this page delivers verified electrical specs, package mapping, I²C timing constraints, write-protection behavior, and real-world use cases aligned to industrial temperature operation (–40°C to +85°C).
Technical Context
The 24LC04BHT-I/OT 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 no external timing components required and supports ACK polling to detect write completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks), enabling storage of up to 512 bytes of nonvolatile configuration or calibration data. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with standard 3.3V and 5V logic domains without level shifting. |
| Max Clock Frequency | 400 kHz at VCC ≥ 2.5V - supports high-speed I²C communication in industrial control and sensor nodes. |
| Standby Current | 1 µA maximum at I-temp - ensures ultra-low power consumption during system sleep or idle states. |
| Page Write Time | 5 ms maximum - defines worst-case latency for committing up to 16 bytes per write cycle. |
| Endurance | 1,000,000 erase/write cycles - guarantees long-term reliability in frequently updated parameter storage applications. |
| Data Retention | Greater than 200 years - ensures persistent data integrity across product lifecycles without refresh. |
Pinout & Package
24LC04BHT-I/OT is supplied in an 8-lead SOT-23 package (5-pin variant with pins 1=SCL, 2=VSS, 3=SDA, 4=VCC, 5=WP). Pins A0–A2 are not connected internally and may be left floating or tied to VSS/VCC without functional impact.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL | Serial Clock Input | Synchronizes all I²C transactions; requires external pull-up; must meet THIGH/TLOW timing per AC specs. |
| VSS | Ground Reference | Primary return path for all internal circuitry and I/O; must be low-impedance to minimize noise coupling. |
| SDA | Bidirectional Data I/O | Open-drain bus line requiring external pull-up; transmits/receives addresses, commands, and data under SCL control. |
| VCC | Power Supply | Supplies core logic and EEPROM array; must remain within 2.5V–5.5V during all operations including write cycles. |
| WP | Hardware Write-Protect Input | When high (VCC), disables writes to memory addresses 100h–1FFh; when low (VSS), enables full-array write access. |
Key Features
| Feature | Design Value |
|---|---|
| Half-Array Hardware Write-Protection | Physically disables writes to upper 256-byte block (100h–1FFh) via single WP pin state - eliminates need for software lock bits or firmware overhead. |
| 16-Byte Page Write Buffer | Reduces I²C bus occupancy by allowing up to 16 bytes to be loaded before initiating internal write - improves throughput vs. byte-write-only devices. |
| Schmitt Trigger Inputs | Provides hysteresis (≥0.05×VCC) on SDA/SCL - rejects noise spikes up to 50 ns and enables reliable operation on electrically noisy PCBs or long traces. |
| Self-Timed Erase/Write Cycle | Eliminates requirement for external timing components or host-driven delays - simplifies firmware design and guarantees consistent 5 ms max write latency. |
| I²C Clock Compatibility | Supports 100 kHz, 400 kHz, and (via 24FC04H variant) 1 MHz - but 24LC04BHT-I/OT is rated only to 400 kHz at VCC ≥ 2.5V per DS20002119C. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-on initialization via I²C; WP pin tied to VCC to prevent accidental overwrites during field servicing. Use Value: Ensures measurement accuracy remains traceable across device lifetime without requiring recalibration tools at end-user sites. | Use Scenario: Holding user-selectable therapy parameters (e.g., dose rate, duration) in portable infusion pumps with battery backup. IC Role / Device Role / Timing Role: Low-power EEPROM interfaced to microcontroller during active mode; retains settings through >10-year shelf life and repeated power cycles. Use Value: Meets IEC 62304 safety requirements for persistent data integrity and enables audit-ready parameter history logging. |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Saving seat/mirror position presets and lighting profiles in automotive BCMs compliant with AEC-Q100 Grade 2. IC Role / Device Role / Timing Role: I²C slave device operating across –40°C to +85°C; WP pin monitored by MCU to enforce secure update protocols before writing new profiles. Use Value: Provides certified data retention >200 years and 1M endurance - exceeds OEM requirements for 15-year vehicle service life. | Use Scenario: Storing signed firmware patches for over-the-air updates in ANSI C12.22-compliant smart meters deployed in harsh outdoor environments. IC Role / Device Role / Timing Role: Secure configuration store with hardware write-protect enabled during normal operation; accessed only during authenticated bootloader sessions. Use Value: Prevents unauthorized or corrupted patch writes while maintaining compatibility with legacy I²C host stacks and minimal BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04HT-I/OT | Lower VCC min (1.7V), same 400 kHz max, identical pinout and memory map. | Enables operation in 1.8V systems where 24LC04BHT-I/OT cannot function. | Select when supply voltage may dip below 2.5V; verify system-level noise immunity is sufficient for lower-voltage I²C signaling. |
| AT24C04-SSHM-T | Same 4-Kbit size, 2.5V–5.5V range, but rated to 1 MHz clock and lacks half-array WP (full-array or none). | Requires software-managed write protection; better suited for high-throughput logging where speed outweighs selective protection. | Choose if higher bandwidth is critical and hardware-based partial write-protection is unnecessary. |
Compared with 24LC04BHT-I/OT, 24AA04HT-I/OT extends voltage range downward without sacrificing temperature grade or pin compatibility, while AT24C04-SSHM-T trades selective hardware write-protection for faster I²C timing - making each alternative optimal only under specific system-level constraints.
Availability
24LC04BHT-I/OT is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive electronics requiring stable component supply, extended temperature operation, and certified data retention.
Supply support for 24LC04BHT-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 leading provider of microcontrollers, analog devices, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability silicon and development tools.
The 24LC04BHT-I/OT belongs to Microchip's 24XX04H family of I²C EEPROMs, designed specifically for robust, low-power, and secure nonvolatile data storage in space-constrained embedded systems operating across extended industrial temperatures.
FAQ
What is the maximum clock frequency supported by the 24LC04BHT-I/OT?
The 24LC04BHT-I/OT supports a maximum I²C clock frequency of 400 kHz when VCC is between 2.5V and 5.5V. This is confirmed in the Device Selection Table and AC Characteristics section of DS20002119C. Frequencies above 400 kHz are not guaranteed for this variant - the 24FC04H supports 1 MHz, but 24LC04BHT-I/OT does not.
Does the 24LC04BHT-I/OT require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC04BHT-I/OT requires external pull-up resistors on both SDA and SCL lines because its I/O pins are open-drain. Typical values are 2 kΩ for 400 kHz operation, as specified in the Serial Address/Data I/O description. Pull-ups must connect to the same VCC domain used by the 24LC04BHT-I/OT to ensure valid logic levels.
How does the WP pin function on the 24LC04BHT-I/OT?
On the 24LC04BHT-I/OT, the WP pin enables hardware write-protection for the upper 256-byte memory block (addresses 100h–1FFh) when tied to VCC. When WP is tied to VSS, full-array write access is enabled. This behavior is explicitly defined in Section 2.4 and Figure 6-3 of DS20002119C and applies directly to the 24LC04BH variant.
Can the 24LC04BHT-I/OT operate at 1.8V?
No, the 24LC04BHT-I/OT has a minimum supply voltage of 2.5V, as stated in the Device Selection Table and Electrical Characteristics. Operation below 2.5V is not guaranteed and may result in unreliable reads/writes or failure to acknowledge I²C transactions. For 1.7V–5.5V operation, consider the 24AA04HT-I/OT instead.
What is the endurance rating of the 24LC04BHT-I/OT?
The 24LC04BHT-I/OT is rated for 1,000,000 erase/write cycles at 25°C and 5.5V, as specified in Table 1-1 (Parameter D18) of DS20002119C. This endurance applies to both byte and page write modes and is validated under industrial temperature conditions per Microchip's characterization methodology.
24LC04BHT-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:
- 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:
- SOT-23-5
24LC04BHT-I/OT FAQ
1.How can I place an order for 24LC04BHT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BHT-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 24LC04BHT-I/OT reliable?
The price and inventory of 24LC04BHT-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 24LC04BHT-I/OT is usually 5 days.
3.What payment methods are accepted for 24LC04BHT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BHT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BHT-I/OT?
24LC04BHT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BHT-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 24LC04BHT-I/OT?
For technical support, including 24LC04BHT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BHT-I/OT requirements.
6.How does Aetrix verify that 24LC04BHT-I/OT is sourced from the original manufacturer or authorized distributors?
All 24LC04BHT-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 24LC04BHT-I/OT meets industry standards.
7.What is the process for return or replacement of 24LC04BHT-I/OT?
All 24LC04BHT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BHT-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 24LC04BHT-I/OT part is unused and in its original packaging.
Return procedure for 24LC04BHT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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