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Microchip Technology 24LC04BHT-E/OT
- Part No.:
- 24LC04BHT-E/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SC-74A, SOT-753
- Datasheet:
-
24LC04BHT-E/OT.pdf
- Description:
- IC EEPROM 4KBIT I2C SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,217
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Product details
Overview
24LC04BHT-E/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 (I-temp), and hardware write-protect for half-array (100h–1FFh). It supports industrial and extended temperature ranges and is used in embedded system configuration storage where low-power nonvolatile memory is required.
For engineers reviewing the 24LC04BHT-E/OT datasheet, 24LC04BHT-E/OT pinout, 24LC04BHT-E/OT application, or 24LC04BHT-E/OT equivalent, this page delivers verified electrical specs, package mapping, I²C timing compliance, write-protection behavior, and real-world use context - all confirmed against Microchip DS20002119C.
Technical Context
The 24LC04BHT-E/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 enables current-address, random, and sequential read modes, while the 16-byte page buffer supports efficient page writes.
Write protection is implemented via the WP pin: tied to VCC, it disables writes to addresses 100h–1FFh (half-array); tied to VSS, full-array access 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 | 4 Kbit (2 × 256 × 8-bit blocks), enabling compact firmware parameter or calibration data storage |
| Supply Voltage | 2.5V–5.5V - compatible with standard 3.3V and 5V logic systems without level shifting |
| Max Clock Frequency | 400 kHz - supports high-speed I²C communication while maintaining robustness on noisy PCBs |
| Page Write Buffer | 16 bytes - reduces bus transactions by up to 16× vs. byte-write for contiguous data updates |
| Write Cycle Time | 5 ms maximum - defines worst-case latency before next I²C command can be issued |
| Endurance | 1 million erase/write cycles - ensures long-term reliability in field-updatable systems |
| Data Retention | 200 years - guarantees persistent storage integrity across product lifecycle without refresh |
Pinout & Package
24LC04BHT-E/OT is supplied in an 8-lead SOT-23 package (5-pin variant, pin 1 = SCL, pin 2 = VSS, pin 3 = SDA, pin 4 = VCC, pin 5 = WP). Pins A0–A2 are not internally connected 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 transfers; requires external pull-up; must meet THIGH/TLOW timing per VCC |
| VSS | Ground Reference | Return path for all internal circuitry; must be low-impedance connection to system GND plane |
| SDA | Bidirectional Data I/O | Open-drain output requiring external pull-up; changes only during SCL low except for Start/Stop |
| VCC | Power Supply | 2.5V–5.5V input; decoupling capacitor (0.1 µF) recommended within 10 mm of pin |
| WP | Hardware Write-Protect | Tied to VCC → protects 100h–1FFh; tied to VSS → enables full-array write access |
Key Features
| Feature | Design Value |
|---|---|
| I²C Bus Compatibility | Fully compliant with Philips I²C specification, supporting standard-mode (100 kHz), fast-mode (400 kHz), and multi-master arbitration |
| Schmitt Trigger Inputs | Input hysteresis ≥0.05×VCC eliminates false triggering from EMI or slow-rising signals on SCL/SDA |
| Output Slope Control | Controlled rise/fall times prevent ground bounce and reduce EMI during SDA transitions |
| Half-Array Write Protection | Hardware-enforced lock on upper 2 Kbit block (100h–1FFh) prevents accidental firmware corruption |
| Extended Temperature Range | -40°C to +125°C operation validated for automotive and industrial under-hood applications |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-on reset via I²C to initialize ADC reference points. Use Value: Enables one-time calibration during manufacturing and eliminates need for external trim pots or reprogramming during field service. |
Use Scenario: Retaining user-configurable settings (e.g., mirror position, seat memory, lighting profiles) in vehicle body control units. IC Role / Device Role / Timing Role: Low-power I²C slave storing persistent user preferences with guaranteed retention over 200 years. Use Value: Survives battery disconnect events and maintains settings across vehicle lifetime without backup capacitors. |
| Medical Device Configuration | Smart Energy Meter Firmware Patch Storage |
|
Use Scenario: Holding regulatory-compliant device identification, calibration history, and audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for traceability data accessed only during maintenance mode via authenticated I²C session. Use Value: Meets IEC 62304 data integrity requirements with 1M-cycle endurance for frequent log updates. |
Use Scenario: Storing field-deployed firmware patches that are applied after power cycle in utility-grade electricity meters. IC Role / Device Role / Timing Role: Dual-block architecture allows patch code to reside in protected block (100h–1FFh) while active config remains in unprotected block (000h–0FFh). Use Value: Prevents accidental overwrite of critical patch data during routine configuration writes. |
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/OT | Lower VCC min (1.7V), same 400 kHz max clock, but rated only for -40°C to +85°C (I-temp) | Lacks extended temperature support; unsuitable for under-hood or high-ambient industrial environments | Select when 1.7V operation is required and ambient stays ≤85°C; verify WP behavior matches design intent |
| AT24C04-SSH-T | Same 4-Kbit size, 2.5V–5.5V, 400 kHz, but offers 2-wire interface with different ACK polling timing and no factory-programmable marking option | Microchip-specific features like half-array write-protect and AEC-Q100 qualification are absent | Choose for cost-sensitive consumer designs where AEC-Q100 and hardware write-protect are not mandatory |
Compared with 24LC04BHT-E/OT, the 24AA04HT-I/OT trades extended temperature capability for lower-voltage operation, while the AT24C04-SSH-T omits automotive qualification and half-array protection - making the 24LC04BHT-E/OT uniquely suited for safety-critical, high-reliability deployments requiring both environmental robustness and selective memory locking.
Availability
24LC04BHT-E/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical device configuration, and smart energy meter firmware patch storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 24LC04BHT-E/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 company specializing in microcontrollers, analog devices, and memory solutions, with global manufacturing and quality certifications including ISO 9001 and IATF 16949.
The 24LC04BHT-E/OT belongs to Microchip's 24XX04H family of I²C EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in automotive, industrial, and medical systems demanding AEC-Q100 qualification and extended temperature operation.
FAQ
What is the minimum supply voltage required for 24LC04BHT-E/OT operation?
The 24LC04BHT-E/OT requires a minimum supply voltage of 2.5V, as specified in its DC characteristics table for both industrial and extended temperature ranges. Operation below 2.5V is not guaranteed and may result in unreliable I²C communication or write failures. This distinguishes it from the 24AA04H variant, which supports down to 1.7V.
How does the WP pin function on the 24LC04BHT-E/OT?
On the 24LC04BHT-E/OT, the WP pin enables hardware write protection: when tied to VCC, writes to memory addresses 100h–1FFh (upper 2 Kbit block) are inhibited while reads remain fully functional; when tied to VSS, full-array write access is enabled. This behavior is electrically verified and documented in Section 2.4 and Figure 6-3 of DS20002119C.
Is the 24LC04BHT-E/OT pin-compatible with other 24XX04H family members in SOT-23 packages?
Yes - the 24LC04BHT-E/OT shares identical 5-pin SOT-23 pinout (SCL, VSS, SDA, VCC, WP) and footprint with 24AA04HT-I/OT and 24FC04HT-E/OT. However, voltage range, clock speed, and temperature rating differ; substituting without verifying these parameters may cause functional failure.
What is the maximum page write size supported by the 24LC04BHT-E/OT?
The 24LC04BHT-E/OT supports a maximum page write size of 16 bytes, as confirmed in the Features section and Section 6.2 of DS20002119C. Attempting to write more than 16 bytes before issuing a Stop condition causes address wraparound within the current page, potentially overwriting previously loaded data.
Does the 24LC04BHT-E/OT require external pull-up resistors on SDA and SCL lines?
Yes - the 24LC04BHT-E/OT has open-drain SDA and SCL pins, mandating external pull-up resistors. Recommended values are 2 kΩ for 400 kHz operation and 10 kΩ for 100 kHz, connected to VCC. Pull-up strength directly affects rise time compliance per AC timing Table 1-2.
24LC04BHT-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
24LC04BHT-E/OT FAQ
1.How can I place an order for 24LC04BHT-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BHT-E/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-E/OT reliable?
The price and inventory of 24LC04BHT-E/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-E/OT is usually 5 days.
3.What payment methods are accepted for 24LC04BHT-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BHT-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BHT-E/OT?
24LC04BHT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BHT-E/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-E/OT?
For technical support, including 24LC04BHT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BHT-E/OT requirements.
6.How does Aetrix verify that 24LC04BHT-E/OT is sourced from the original manufacturer or authorized distributors?
All 24LC04BHT-E/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-E/OT meets industry standards.
7.What is the process for return or replacement of 24LC04BHT-E/OT?
All 24LC04BHT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BHT-E/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-E/OT part is unused and in its original packaging.
Return procedure for 24LC04BHT-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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