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Microchip Technology 24LC04BT-I/MS
- Part No.:
- 24LC04BT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
24LC04BT-I/MS.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,380
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Product details
Overview
24LC04BT-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-protection via the WP pin - used for configuration storage in embedded controllers and power management systems.
For engineers reviewing the 24LC04BT-I/MS datasheet, 24LC04BT-I/MS pinout, 24LC04BT-I/MS application, or 24LC04BT-I/MS equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), MSOP-8 package compatibility, I²C bus timing compliance at 400 kHz, and page-write capability supporting up to 16 bytes per cycle.
Technical Context
The 24LC04BT-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. It supports standard-mode (100 kHz) and fast-mode (400 kHz) operation under industrial temperature conditions.
Its internal architecture includes a 16-byte page write buffer, self-timed erase/write cycles, and an Address Pointer that auto-increments during sequential reads. The device uses no internal connection for A0–A2 pins, enabling simplified board layout and eliminating address conflicts on shared buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks), sufficient for storing calibration data, device IDs, or boot configuration in space-constrained designs |
| Interface | I²C-compatible two-wire serial interface with 400 kHz max clock rate at VCC ≥ 2.5V, ensuring interoperability with standard microcontroller peripherals |
| Supply Voltage | 2.5V to 5.5V - compatible with 3.3V and 5V logic domains without level-shifting circuitry |
| Write Cycle Time | ≤5 ms per byte or page - enables deterministic firmware update latency and predictable system response during nonvolatile writes |
| Endurance | 1,000,000 erase/write cycles - supports long-term field deployment in telemetry loggers and industrial sensors |
| Data Retention | >200 years at +85°C - guarantees persistent storage integrity across product lifecycles without refresh mechanisms |
| Temperature Range | Industrial grade: –40°C to +85°C - validated for use in automotive body control modules and factory automation equipment |
Pinout & Package
8-Lead MSOP (MS) package with exposed pad option; compact 3 mm × 3 mm footprint ideal for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection - may be left floating or tied to VSS/VCC without affecting functionality |
| A1 | Address Input | No internal connection - eliminates need for external pull-up/down resistors and simplifies routing |
| A2 | Address Input | No internal connection - allows direct pin-to-pin replacement with other 24XX04 family members regardless of A0–A2 state |
| VSS | Ground | Reference node for all digital and analog circuitry; must be low-impedance connection to minimize noise coupling |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up resistor (2 kΩ typical for 400 kHz operation) |
| SCL | Serial Clock Input | Input-only synchronous clock signal; edge-triggered sampling ensures robust timing margin under bus capacitance loads |
| WP | Write-Protect Control | Logic-high disables all write operations - provides hardware-level security against accidental firmware corruption |
| VCC | Power Supply | Primary supply rail; decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable I²C communication |
Key Features
| Feature | Design Value |
|---|---|
| Page Write Buffer | 16-byte on-chip buffer enables burst writes without host intervention, reducing I²C bus occupancy by up to 94% vs. byte-by-byte writes |
| Schmitt Trigger Inputs | Hysteresis ≥0.05×VCC on SDA/SCL rejects noise spikes up to 50 ns, improving reliability in electrically noisy environments like motor drives |
| Output Slope Control | Controlled rise/fall times prevent ground bounce during switching, eliminating false Start/Stop condition generation on shared bus lines |
| Hardware Write Protection | WP pin ties directly to VCC to lock entire memory array (000h–1FFh), preventing overwrite during brown-out or software faults |
| ESD Robustness | >4 kV HBM rating protects against handling damage and transient events in assembly and field service scenarios |
Applications
| Smart Energy Meters | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Storing tariff schedules, meter calibration constants, and tamper-event logs across 15+ year field deployments. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed data retention >200 years and 1M endurance cycles. Use Value: Eliminates battery-backed SRAM and reduces BOM cost while meeting IEC 62056-21 data integrity requirements. | Use Scenario: Saving module identification, channel calibration offsets, and firmware update flags in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: I²C slave device providing persistent parameter storage accessible during cold start and runtime reconfiguration. Use Value: Enables zero-latency recovery after power loss and supports field-upgradable I/O mapping without external programming tools. |
| Automotive Body Control Units | Medical Infusion Pumps |
Use Scenario: Recording seat position presets, mirror angles, and lighting profiles in vehicles compliant with AEC-Q100 Grade 2. IC Role / Device Role / Timing Role: Automotive-qualified EEPROM interfacing directly with CAN/LIN gateway MCUs via I²C. Use Value: Meets AEC-Q100 qualification and supports fail-safe write abort during voltage dips below 2.5V. | Use Scenario: Storing drug library parameters, dose limits, and usage history in Class II medical devices requiring FDA 21 CFR Part 11 compliance. IC Role / Device Role / Timing Role: Secure, traceable configuration storage with hardware write-protection to prevent unauthorized parameter changes. Use Value: WP pin enables audit-trail integrity; 1 µA standby current extends battery life in portable infusion systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04T-I/MS | Lower VCC min (1.7V), same 400 kHz max clock, identical pinout and memory map | Better suited for battery-powered systems with brown-out conditions below 2.5V | Select when operating from single-cell Li-ion or coin-cell sources where 2.5V minimum cannot be guaranteed |
| AT24C04-MAHM-T | Same 4-Kbit capacity, 1 MHz I²C support, but requires 1.8V min and lacks AEC-Q100 qualification | Higher-speed bus operation possible, but not qualified for automotive environments | Choose for consumer electronics or industrial controls where speed matters more than automotive qualification |
Compared with 24LC04BT-I/MS, the 24AA04T-I/MS offers wider voltage flexibility at the cost of reduced noise immunity at low VCC, while the AT24C04-MAHM-T trades automotive qualification for higher clock speed - making the 24LC04BT-I/MS optimal for cost-sensitive, temperature-stable industrial and automotive applications requiring guaranteed 2.5V–5.5V operation.
Availability
24LC04BT-I/MS is available at Aetrix Electronics and suitable for smart energy meters, industrial PLC I/O modules, and automotive body control units requiring stable component supply with full traceability and extended lifecycle support.
Supply support for 24LC04BT-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 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, I²C-based configuration and data logging in industrial, automotive, and consumer applications.
FAQ
What is the maximum I²C clock frequency supported by the 24LC04BT-I/MS?
The 24LC04BT-I/MS supports up to 400 kHz I²C clock frequency when VCC is between 2.5V and 5.5V. At voltages below 2.5V, it defaults to 100 kHz operation - a limitation inherent to its 24LC04B variant design, unlike the 24FC04 which supports 1 MHz across the full 1.7V–5.5V range. This ensures timing compliance without external clock dividers.
Does the 24LC04BT-I/MS require external pull-up resistors on SDA and SCL lines?
Yes, the 24LC04BT-I/MS requires external pull-up resistors on both SDA and SCL lines because its I²C interface uses open-drain outputs. For 400 kHz operation, a 2 kΩ resistor to VCC is recommended; for 100 kHz, 10 kΩ is typical. These values ensure proper rise time and noise margin while maintaining bus capacitance compliance per I²C specification.
Can the 24LC04BT-I/MS be used in automotive applications?
Yes, the 24LC04BT-I/MS is AEC-Q100 qualified for automotive applications and rated for the industrial temperature range (–40°C to +85°C). Its hardware write-protection, 1 µA standby current, and robust ESD protection (>4 kV HBM) make it suitable for body control modules, infotainment configuration storage, and ADAS sensor calibration data retention.
What is the function of the A0, A1, and A2 pins on the 24LC04BT-I/MS?
The A0, A1, and A2 pins on the 24LC04BT-I/MS have no internal connection and are unused. They may be left floating or tied to VSS or VCC without affecting device operation. This design simplifies PCB layout and eliminates address conflict concerns when multiple 24LC04BT-I/MS devices share the same I²C bus.
How does the write-protection feature work on the 24LC04BT-I/MS?
The 24LC04BT-I/MS uses the WP (Write-Protect) pin to enable hardware-level memory locking: when WP is tied to VCC, all write operations to the full 4-Kbit array (addresses 000h–1FFh) are inhibited, while read operations remain fully functional. This prevents accidental overwrites during power transients or firmware errors, and requires no software overhead to enforce.
24LC04BT-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:
- 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
24LC04BT-I/MS FAQ
1.How can I place an order for 24LC04BT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BT-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 24LC04BT-I/MS reliable?
The price and inventory of 24LC04BT-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 24LC04BT-I/MS is usually 5 days.
3.What payment methods are accepted for 24LC04BT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BT-I/MS?
24LC04BT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BT-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 24LC04BT-I/MS?
For technical support, including 24LC04BT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BT-I/MS requirements.
6.How does Aetrix verify that 24LC04BT-I/MS is sourced from the original manufacturer or authorized distributors?
All 24LC04BT-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 24LC04BT-I/MS meets industry standards.
7.What is the process for return or replacement of 24LC04BT-I/MS?
All 24LC04BT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BT-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 24LC04BT-I/MS part is unused and in its original packaging.
Return procedure for 24LC04BT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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