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Microchip Technology 24LC04BT-I/MC
- Part No.:
- 24LC04BT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
24LC04BT-I/MC.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:13,028
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Product details
Overview
24LC04BT-I/MC 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 DFN.
For engineers reviewing the 24LC04BT-I/MC datasheet, 24LC04BT-I/MC pinout, 24LC04BT-I/MC application, or 24LC04BT-I/MC equivalent, key selection considerations include VCC voltage compliance (2.5V min), I²C timing at 400 kHz, page write buffer size (16 bytes), endurance (1 million cycles), and DFN package thermal/mechanical constraints for PCB layout and reflow.
Technical Context
The 24LC04BT-I/MC implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer supports current-address, random, and sequential read modes, while the 16-byte page write buffer enables efficient multi-byte programming within physical page boundaries (0x000–0x0FF and 0x100–0x1FF).
Write protection is implemented via a dedicated WP pin tied to VCC (full array protected) or VSS (read/write enabled). Acknowledge polling allows host firmware to detect write cycle completion without fixed delays, improving bus utilization in time-critical embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (2 × 256 × 8-bit blocks), enabling compact nonvolatile storage for configuration, calibration, or event logging in space-constrained designs |
| VCC Range | 2.5V to 5.5V - requires stable supply above 2.5V; not compatible with 1.8V or 2.0V logic domains |
| Max Clock Frequency | 400 kHz - limits maximum I²C throughput to ~40 kB/s (including overhead); not suitable for 1 MHz high-speed I²C buses |
| Page Write Time | 5 ms maximum - defines worst-case blocking time for host CPU during write operations |
| Endurance | 1,000,000 erase/write cycles - supports frequent updates over product lifetime (e.g., daily writes for >27 years) |
| Data Retention | 200 years at +25°C - ensures long-term reliability of stored parameters without refresh |
| Standby Current | 1 µA maximum (I-temp.) - enables ultra-low-power operation in battery-backed or energy-harvesting systems |
Pinout & Package
Package: 8-Lead DFN (2 mm × 3 mm, wettable flanks), RoHS-compliant, with exposed pad optionally connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address Input | No internal connection; may be left floating or tied to VSS/VCC - no device addressing capability |
| A1 | Address Input | No internal connection; no effect on I²C client address (fixed as 1010xxx0/1) |
| A2 | Address Input | No internal connection; unused per datasheet - eliminates need for external pull-up/down resistors |
| VSS | Ground | Reference node for all signals; must be low-impedance path to system ground plane |
| SDA | Serial Data I/O | Open-drain bidirectional line requiring external pull-up (2 kΩ typical for 400 kHz); carries addresses, data, and ACK/NACK |
| SCL | Serial Clock Input | Input-only clock line driven by host controller; synchronizes all data transfers and timing windows |
| WP | Write-Protect Control | Logic-level input: VSS = write enabled, VCC = full-array write protection - critical for firmware update safety |
| VCC | Power Supply | Primary power rail; must be decoupled with ≥0.1 µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| I²C Compatibility | Fully compliant with standard-mode I²C protocol (100 kHz) and fast-mode (400 kHz), including Start/Stop detection, ACK/NACK, and arbitration support |
| Hardware Write Protection | Dedicated WP pin provides fail-safe, pin-level disable of all write operations - prevents accidental corruption during power transitions or firmware faults |
| Noise Immunity | Schmitt-trigger inputs and 50 ns input filter on SDA/SCL reject EMI and bus transients, ensuring reliable operation in noisy industrial environments |
| Page Write Buffer | 16-byte on-chip buffer enables burst writes within a single page boundary, reducing I²C transaction overhead by up to 94% vs. byte-write mode |
| Low-Power Operation | 1 µA standby current and 1 mA active read current allow integration into always-on sensor nodes and battery-powered edge devices |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in programmable logic controllers and environmental monitors. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during boot or recalibration; I²C interface synchronized to host MCU's clock domain. Use Value: Enables field-replaceable sensors without firmware reflash; 200-year data retention guarantees accuracy across equipment lifetime. | Use Scenario: Holding user-selectable therapy parameters, device ID, and usage logs in portable infusion pumps and diagnostic handhelds. IC Role / Device Role / Timing Role: Secure, low-power configuration memory interfaced to ARM Cortex-M host via I²C; WP pin tied to system security controller. Use Value: Hardware write-protection prevents unauthorized parameter changes; 1 µA standby current extends battery life between charges. |
| Automotive Body Control Module | Consumer Appliance Settings |
Use Scenario: Saving seat/mirror position presets, lighting profiles, and door lock configurations in AEC-Q100 qualified body control units. IC Role / Device Role / Timing Role: I²C EEPROM accessed by microcontroller during wake-up; operates across –40°C to +85°C ambient range. Use Value: AEC-Q100 qualification ensures reliability under automotive thermal cycling and vibration; 1M-cycle endurance supports daily user adjustments. | Use Scenario: Retaining user preferences (temperature setpoints, cycle selections, language) in smart refrigerators and washing machines after power loss. IC Role / Device Role / Timing Role: Low-cost, pin-compatible memory mapped to I²C bus of appliance MCU; powered from 3.3V or 5V rail. Use Value: 400 kHz I²C speed enables fast UI response; DFN package saves board space in crowded control boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04T-I/MC | Wider VCC range (1.7V–5.5V); supports 100 kHz at 1.7V–2.49V, but only 400 kHz above 2.5V | Enables direct use in 1.8V systems where 24LC04BT-I/MC cannot operate | Select when system VCC may dip below 2.5V or when 1.8V compatibility is required |
| AT24C04D-SSHM-T | Same 4-Kbit capacity, 2.5V–5.5V VCC, 400 kHz, but uses different I²C address scheme (1010A2A1A0R/W) and lacks AEC-Q100 qualification | Not automotive-qualified; requires address pin handling in software | Choose for cost-sensitive industrial or consumer designs where AEC-Q100 is unnecessary and address flexibility is desired |
Compared with 24LC04BT-I/MC, the 24AA04T-I/MC offers lower-voltage operation at the expense of identical 400 kHz performance only above 2.5V, while the AT24C04D-SSHM-T trades automotive qualification for configurable addressing - making 24LC04BT-I/MC optimal for industrial and automotive applications demanding guaranteed write-protection and temperature robustness.
Availability
24LC04BT-I/MC is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-term data retention, and AEC-Q100-compliant reliability.
Supply support for 24LC04BT-I/MC 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 family delivers cost-optimized, I²C-based serial EEPROMs targeting industrial, automotive, and consumer applications requiring robust nonvolatile storage with hardware write protection and extended temperature operation.
FAQ
What is the minimum VCC voltage required for reliable operation of the 24LC04BT-I/MC?
The 24LC04BT-I/MC 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 unreliable I²C communication, incomplete writes, or data corruption. This distinguishes it from the 24AA04 variant, which supports down to 1.7V.
Does the 24LC04BT-I/MC support 1 MHz I²C clock frequency?
No, the 24LC04BT-I/MC does not support 1 MHz I²C operation. Its maximum clock frequency is 400 kHz, as confirmed in the Device Selection Table and AC Characteristics section of the datasheet. The 24FC04 variant is the only member of the 24XX04 family rated for 1 MHz operation.
How many I²C addresses does the 24LC04BT-I/MC support?
24LC04BT-I/MC supports a single fixed I²C client address: 0xA0 (write) / 0xA1 (read), derived from the 4-bit control code '1010' and block-select bit B0. Pins A0, A1, and A2 are not internally connected and have no effect on addressing - unlike some other EEPROM families, this device does not support address pin multiplexing.
What is the function of the WP pin on the 24LC04BT-I/MC, and how should it be used?
The WP (Write-Protect) pin on the 24LC04BT-I/MC enables hardware-level inhibition of all write operations. When tied to VCC, the entire 4-Kbit memory array (addresses 0x000–0x1FF) becomes read-only; when tied to VSS, full read/write access is enabled. This provides deterministic, glitch-immune protection against unintended writes during power-up/down or firmware errors.
Is the 24LC04BT-I/MC qualified for automotive applications?
Yes, the 24LC04BT-I/MC is AEC-Q100 qualified for automotive applications. It meets stress test requirements for temperature cycling, humidity, and electrical robustness, and is rated for the industrial temperature range (–40°C to +85°C), making it suitable for body control modules, infotainment subsystems, and other non-safety-critical automotive electronics.
24LC04BT-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- 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-DFN (2x3)
24LC04BT-I/MC FAQ
1.How can I place an order for 24LC04BT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04BT-I/MC 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/MC reliable?
The price and inventory of 24LC04BT-I/MC 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/MC is usually 5 days.
3.What payment methods are accepted for 24LC04BT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04BT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04BT-I/MC?
24LC04BT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04BT-I/MC 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/MC?
For technical support, including 24LC04BT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04BT-I/MC requirements.
6.How does Aetrix verify that 24LC04BT-I/MC is sourced from the original manufacturer or authorized distributors?
All 24LC04BT-I/MC 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/MC meets industry standards.
7.What is the process for return or replacement of 24LC04BT-I/MC?
All 24LC04BT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04BT-I/MC, 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/MC part is unused and in its original packaging.
Return procedure for 24LC04BT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC04BT-I/MC Tags
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