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Microchip Technology 24LC04BT/SN
- Part No.:
- 24LC04BT/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
24LC04BT/SN.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:15,754
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Product details
Overview
24LC04BT/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, 5 ms max page write time, and industrial temperature range (–40°C to +85°C). It features hardware write-protection via the WP pin and is packaged in an 8-lead narrow SOIC (SN).
For engineers reviewing the 24LC04BT/SN datasheet, 24LC04BT/SN pinout, 24LC04BT/SN application, or 24LC04BT/SN equivalent, this device serves as a low-power, noise-immune nonvolatile memory for embedded system configuration storage, sensor calibration data retention, and firmware parameter backup where I²C bus simplicity and AEC-Q100-qualified reliability are required.
Technical Context
The 24LC04BT/SN implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and bus noise. Its internal architecture includes a 16-byte page write buffer, self-timed erase/write cycle, and address pointer logic supporting current-address, random, and sequential read modes.
It uses open-drain SDA/SCL signaling requiring external pull-ups, supports ACK polling to detect write completion, and enforces strict timing per I²C specification - including 600 ns minimum THD:STA and TSU:STA at 2.5V–5.5V - with no internal connection to A0/A1/A2 pins, simplifying address selection in multi-device systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks), enabling compact storage of boot parameters or device IDs without external address decoding |
| Interface | I²C-compatible two-wire serial interface (SDA/SCL), reducing PCB routing complexity vs. parallel or SPI EEPROMs |
| Write Speed | 5 ms maximum page write time (16 bytes), allowing rapid batch updates while maintaining deterministic latency |
| VCC Range | 2.5V to 5.5V, compatible with 3.3V and 5V microcontroller I/O domains without level shifting |
| Endurance | 1 million erase/write cycles, supporting frequent field-updatable configuration logging in industrial controllers |
| Data Retention | 200 years at +25°C, ensuring long-term validity of stored calibration or security keys across product lifecycle |
| Temperature Range | Industrial grade (–40°C to +85°C), validated for operation in automotive ECUs and factory automation equipment |
Pinout & Package
8-Lead Plastic Small Outline (SN) package - narrow body, 3.90 mm width, 1.27 mm pitch - with gull-wing leads suitable for reflow soldering and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection; may be left floating or tied to VSS/VCC without affecting operation |
| A1 | Address Input | No internal connection; unused in 24LC04B family; eliminates need for external address resistors |
| A2 | Address Input | No internal connection; simplifies board layout by removing three address lines and associated passives |
| VSS | Ground | Reference node for all digital and analog circuitry; must be low-impedance to minimize noise coupling into SDA/SCL |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up (2 kΩ typical for 400 kHz); transmits addresses, data, and ACK/NACK |
| SCL | Serial Clock Input | Master-generated clock synchronizing all transfers; Schmitt-trigger input rejects sub-50 ns noise spikes |
| WP | Write-Protect Control | Active-high hardware lock: tied to VCC disables all writes (read-only mode), enabling safe field firmware reads |
| VCC | Power Supply | 2.5V–5.5V supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable I²C timing |
Key Features
| Feature | Design Value |
|---|---|
| Page Write Buffer | 16-byte on-chip buffer enables burst writes without host intervention, reducing I²C transaction overhead by up to 94% vs. byte-write mode |
| Schmitt Trigger Inputs | Hysteresis ≥0.05×VCC on SDA/SCL ensures reliable signal detection in electrically noisy environments like motor drives or power supplies |
| Hardware Write-Protection | WP pin directly gates internal write logic - no software vulnerability; prevents accidental overwrites during brown-out or reset conditions |
| Low Standby Current | 1 µA maximum at I-temp ensures minimal battery drain in always-on IoT nodes or energy-harvesting sensors |
| AEC-Q100 Qualification | Qualified for automotive applications (Grade 2), validating robustness against thermal cycling, humidity, and ESD (>4 kV HBM) |
Applications
| Motor Control Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing motor phase alignment offsets, PID tuning constants, and fault history logs in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed via I²C during MCU boot and runtime recalibration. Use Value: Enables field-upgradable motor profiles without firmware reflashing; 1M endurance supports daily recalibration over 10+ years. | Use Scenario: Retaining sensor gain/offset coefficients and patient-specific therapy parameters in portable infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory holding FDA-mandated calibration records accessible only via authenticated I²C commands. Use Value: Meets IEC 62304 data integrity requirements; WP pin prevents unauthorized parameter modification during clinical use. |
| Industrial PLC I/O Module Settings | Automotive Body Control Unit (BCU) |
Use Scenario: Saving channel-specific scaling factors, alarm thresholds, and communication baud rates in modular analog input/output cards. IC Role / Device Role / Timing Role: Persistent settings store accessed at power-up to configure FPGA or ASIC peripherals before real-time control loop activation. Use Value: Eliminates manual DIP-switch configuration; 200-year data retention guarantees settings survive 20+ year plant deployments. | Use Scenario: Storing seat position memory, mirror fold/unfold presets, and lighting scene configurations in vehicle door modules. IC Role / Device Role / Timing Role: AEC-Q100-qualified EEPROM interfacing with CAN-connected microcontroller for user preference persistence across ignition cycles. Use Value: Supports OEM-level personalization features with automotive-grade reliability; 400 kHz I²C allows fast recall during <500 ms wake-up sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04T/SN | Wider VCC range (1.7V–5.5V); lower 100 kHz max clock below 2.5V; same pinout and memory map | Better suited for battery-powered devices operating down to 1.8V; not rated for automotive temp range | Select when ultra-low-voltage operation is required and 400 kHz speed is unnecessary |
| AT24C04-PU | Same 4-Kbit capacity and SOIC-8 package; 1 MHz max clock; 100-year data retention; no AEC-Q100 qualification | Lacks automotive qualification and extended temperature support; higher write-cycle endurance (1M vs. 1M - identical) | Choose for cost-sensitive consumer electronics where AEC-Q100 is not mandated |
Compared with 24LC04BT/SN, the 24AA04T/SN offers broader voltage flexibility but sacrifices high-speed I²C performance, while the AT24C04-PU provides faster clocking and lower cost but lacks automotive qualification and industrial temperature assurance.
Availability
24LC04BT/SN is available at Aetrix Electronics and suitable for motor control configuration storage, medical device calibration data retention, and industrial PLC I/O module settings requiring stable component supply and long-term obsolescence management.
Supply support for 24LC04BT/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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC04B series belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in space-constrained embedded systems requiring I²C simplicity and industrial-grade durability.
FAQ
What is the maximum I²C clock frequency supported by the 24LC04BT/SN?
The 24LC04BT/SN supports a maximum I²C clock frequency of 400 kHz when operated within its specified VCC range of 2.5V to 5.5V. At voltages below 2.5V, the device is not rated for operation - unlike the 24AA04 variant - so 400 kHz is its guaranteed high-speed mode. This enables efficient data transfer in real-time control applications without requiring protocol translation or additional bus arbitration logic.
Does the 24LC04BT/SN require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC04BT/SN requires external pull-up resistors on both SDA and SCL lines because it uses open-drain outputs. For reliable 400 kHz operation, a 2 kΩ pull-up to VCC is recommended; for 100 kHz legacy systems, 10 kΩ is acceptable. The 24LC04BT/SN itself does not integrate pull-ups, and omitting them will prevent proper I²C bus signaling and ACK generation.
How does the WP pin function on the 24LC04BT/SN?
The WP (Write-Protect) pin on the 24LC04BT/SN is an active-high hardware enable that disables all write operations when tied to VCC. When WP = VSS, full read/write access is granted. This pin operates independently of software commands, providing fail-safe protection against unintended writes during power transitions or firmware errors - a critical feature for safety-critical applications using the 24LC04BT/SN.
Can the 24LC04BT/SN be used in automotive applications?
Yes, the 24LC04BT/SN is AEC-Q100 qualified (Grade 2) and rated for the industrial temperature range (–40°C to +85°C), making it suitable for under-hood and cabin automotive applications such as body control modules, seat memory systems, and lighting controllers. Its qualification covers stress testing for thermal cycling, humidity, and ESD, confirming reliability in harsh vehicle environments where the 24LC04BT/SN is deployed.
What is the purpose of the A0, A1, and A2 pins on the 24LC04BT/SN?
The A0, A1, and A2 pins on the 24LC04BT/SN have no internal connection and are unused in this device. They may be left floating or tied to VSS or VCC without affecting functionality. This design eliminates external address-select resistors and simplifies PCB layout - a key distinction from higher-density EEPROMs like the 24LC256, where these pins determine I²C slave address.
24LC04BT/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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
24LC04BT/SN FAQ
1.How can I place an order for 24LC04BT/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BT/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 24LC04BT/SN reliable?
The price and inventory of 24LC04BT/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 24LC04BT/SN is usually 5 days.
3.What payment methods are accepted for 24LC04BT/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BT/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BT/SN?
24LC04BT/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BT/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 24LC04BT/SN?
For technical support, including 24LC04BT/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BT/SN requirements.
6.How does Aetrix verify that 24LC04BT/SN is sourced from the original manufacturer or authorized distributors?
All 24LC04BT/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 24LC04BT/SN meets industry standards.
7.What is the process for return or replacement of 24LC04BT/SN?
All 24LC04BT/SN units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BT/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 24LC04BT/SN part is unused and in its original packaging.
Return procedure for 24LC04BT/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC04BT/SN Tags
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