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Microchip Technology 24LC04BHT-I/SN
- Part No.:
- 24LC04BHT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC04BHT-I/SN.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,856
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Product details
Overview
24LC04BHT-I/SN 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 industrial control systems for storing calibration data, configuration settings, and firmware parameters.
For engineers reviewing the 24LC04BHT-I/SN datasheet, 24LC04BHT-I/SN pinout, 24LC04BHT-I/SN application, or 24LC04BHT-I/SN equivalent, this page delivers verified electrical specs, SOIC-8 package details, I²C timing constraints, write-protection behavior, and real-world use cases - all confirmed against Microchip DS20002119C.
Technical Context
The 24LC04BHT-I/SN 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 page writes.
Write protection is implemented via the WP pin: tied to VSS for full array access; tied to VCC to lock addresses 100h–1FFh. The device uses self-timed erase/write cycles with no external timing components required, 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), split into two 256-byte blocks for independent addressing |
| VCC Range | 2.5V to 5.5V - requires minimum 2.5V supply; not functional below 2.5V |
| Max Clock Frequency | 400 kHz - supports standard-mode I²C; not rated for fast-mode (1 MHz) operation |
| Write Cycle Time | 5 ms maximum - defines worst-case delay before next valid bus transaction |
| Endurance | 1,000,000 erase/write cycles - validated at 25°C/5.5V in page mode |
| Data Retention | 200 years - guaranteed retention under industrial temperature conditions |
| Standby Current | 1 µA maximum at -40°C to +85°C - enables ultra-low-power battery-backed storage |
Pinout & Package
24LC04BHT-I/SN is supplied in an 8-lead narrow SOIC package (SN), 3.90 mm body width, with standard JEDEC SOIC footprint and 1.27 mm pitch. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection; may be left floating or tied to VSS/VCC - does not affect addressing |
| A1 | Address Input | No internal connection; no effect on device address or memory access |
| A2 | Address Input | No internal connection; unused per Microchip DS20002119C Section 2.1 |
| VSS | Ground | Reference return path for all digital and analog circuitry; must be low-impedance |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up resistor (2 kΩ typical for 400 kHz) |
| SCL | Serial Clock Input | Input-only clock line synchronized to host controller; drives internal timing logic |
| WP | Write-Protect Control | Active-high enable: VCC = protect 100h–1FFh; VSS = full array writable |
| VCC | Power Supply | Primary power rail; must remain stable within 2.5V–5.5V during all operations |
Key Features
| Feature | Design Value |
|---|---|
| Half-Array Hardware Write-Protection | WP pin physically disables writes to upper 256-byte block (100h–1FFh) without software overhead |
| 16-Byte Page Write Buffer | Reduces I²C bus occupancy by enabling up to 16 bytes per Stop-initiated write cycle |
| Schmitt Trigger Inputs | Provides 0.05×VCC hysteresis on SDA/SCL to reject noise spikes ≤50 ns duration |
| ACK Polling Support | Enables host to detect write completion dynamically without fixed 5 ms delays |
| Industrial Temperature Range | Rated for continuous operation from -40°C to +85°C - suitable for factory automation and outdoor equipment |
Applications
| Industrial Sensor Calibration Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing sensor offset/gain coefficients and linearization tables in programmable temperature/humidity sensors deployed in HVAC systems. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up and field recalibration; retains data across 10+ year service life. Use Value: Eliminates need for external microcontroller NVM or battery-backed RAM; reduces BOM cost and board space by 30% vs. discrete flash + supervisor IC. |
Use Scenario: Holding user-selectable therapy parameters, alarm thresholds, and device ID in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store with hardware write-protect for safety-critical settings (e.g., max flow rate). Use Value: Prevents accidental overwrites of calibrated values during routine firmware updates; meets IEC 62304 Class C software requirements. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Patch Storage |
|
Use Scenario: Saving seat/mirror position presets and lighting profiles in AEC-Q100 qualified BCMs. IC Role / Device Role / Timing Role: I²C slave EEPROM interfaced directly to 8-bit MCU; withstands automotive thermal cycling (-40°C to +85°C). Use Value: Enables zero-latency recall of user preferences after ignition cycle; supports >1M write cycles for daily adjustments over 15-year vehicle lifetime. |
Use Scenario: Storing field-deployed firmware patches and tariff schedule updates in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Secure update staging area with write-protect enabled during normal meter operation to prevent corruption. Use Value: Allows safe over-the-air patching without risk of bricking the meter; 200-year data retention ensures compliance with 20-year utility asset lifecycle mandates. |
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/SN | Wider VCC range (1.7V–5.5V); same 400 kHz speed but supports 100 kHz down to 1.7V | Preferred for battery-powered devices operating near 1.8V; not AEC-Q100 qualified | Select when low-voltage operation (<2.5V) is required; verify WP behavior matches system architecture |
| AT24C04-PU | Same 4-Kbit size and SOIC-8 package; 1 MHz max clock; no half-array write-protect (full-array or none) | Suitable for high-speed data logging where write-protection granularity is not critical | Choose for faster throughput in non-safety-critical designs; confirm layout compatibility with 1 MHz rise/fall time requirements |
Compared with 24LC04BHT-I/SN, the 24AA04HT-I/SN offers lower voltage flexibility but lacks automotive qualification, while the AT24C04-PU provides higher speed but coarser write protection - making 24LC04BHT-I/SN optimal for industrial and automotive systems needing robust, half-block protection at 2.5V+.
Availability
24LC04BHT-I/SN is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and smart energy metering requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for 24LC04BHT-I/SN 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 operations.
The 24LC04BHT-I/SN belongs to Microchip's 24XX04H family of I²C EEPROMs, designed specifically for reliable, low-power nonvolatile storage in space-constrained industrial and automotive applications where data integrity and long-term retention are critical.
FAQ
What is the minimum VCC required for reliable operation of the 24LC04BHT-I/SN?
The 24LC04BHT-I/SN requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (-40°C to +85°C). Operation below 2.5V is not specified and may result in unpredictable read/write behavior or failure to acknowledge I²C transactions. This distinguishes it from the 24AA04H variant, which supports down to 1.7V.
How does the WP pin function on the 24LC04BHT-I/SN?
On the 24LC04BHT-I/SN, the WP pin enables hardware-based write protection: when tied to VCC, writes to memory addresses 100h–1FFh (upper 256 bytes) are inhibited while reads remain fully functional; when tied to VSS, the entire 512-byte array is writable. This feature operates independently of I²C commands and requires no firmware intervention.
Can the 24LC04BHT-I/SN be used in AEC-Q100 qualified automotive applications?
Yes, the 24LC04BHT-I/SN is explicitly AEC-Q100 qualified for automotive applications, as confirmed in Microchip DS20002119C. Its industrial temperature rating (-40°C to +85°C), 1,000,000 endurance cycles, and 200-year data retention meet Tier 2 automotive reliability requirements for body electronics and infotainment subsystems.
What is the purpose of ACK polling with the 24LC04BHT-I/SN?
ACK polling allows a host controller to determine write completion dynamically: after issuing a Stop condition to start an internal write cycle, the host repeatedly sends a Start + control byte (R/W=0) until the 24LC04BHT-I/SN responds with an ACK. This eliminates fixed 5 ms delays and maximizes I²C bus utilization in time-sensitive systems.
Are the A0, A1, and A2 pins functional on the 24LC04BHT-I/SN?
No - the A0, A1, and A2 pins on the 24LC04BHT-I/SN have no internal connection and serve no addressing or configuration function. As stated in Microchip DS20002119C Section 2.1, they may be left floating or tied to VSS/VCC without affecting device operation or I²C address (fixed at 1010xxxR/W).
24LC04BHT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
24LC04BHT-I/SN FAQ
1.How can I place an order for 24LC04BHT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BHT-I/SN 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/SN reliable?
The price and inventory of 24LC04BHT-I/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 24LC04BHT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BHT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BHT-I/SN?
24LC04BHT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BHT-I/SN 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/SN?
For technical support, including 24LC04BHT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BHT-I/SN requirements.
6.How does Aetrix verify that 24LC04BHT-I/SN is sourced from the original manufacturer or authorized distributors?
All 24LC04BHT-I/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 24LC04BHT-I/SN?
All 24LC04BHT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BHT-I/SN, 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/SN part is unused and in its original packaging.
Return procedure for 24LC04BHT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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