My Inquiry
My Account
Microchip Technology 24LC04B-I/MC
- Part No.:
- 24LC04B-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
24LC04B-I/MC.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,607
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
24LC04B-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 24LC04B-I/MC datasheet, 24LC04B-I/MC pinout, 24LC04B-I/MC application, or 24LC04B-I/MC equivalent, this device serves as a low-power, noise-immune nonvolatile memory for configuration storage, calibration data retention, and system parameter backup in space-constrained embedded designs.
Technical Context
The 24LC04B-I/MC implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress ground bounce and bus noise. Its internal address pointer supports current-address, random, and sequential read modes, while the 16-byte page write buffer enables efficient multi-byte updates without host-side timing overhead.
Write protection is implemented via a dedicated WP pin tied to VCC to disable all write operations across the full 000h–1FFh address space. The device uses self-timed erase/write cycles and supports acknowledge polling to determine write completion-no fixed delay required between write commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Kbit (512 bytes), organized as two independent 256 × 8-bit blocks for flexible block-level access |
| VCC Range | 2.5V to 5.5V - ensures compatibility with 3.3V and 5V logic systems; excludes sub-2.5V operation unlike 24AA04/24FC04 |
| Max Clock Frequency | 400 kHz - defines maximum I²C bus speed; supports standard-mode I²C without requiring fast-mode controllers |
| Page Write Time | 5 ms maximum - determines minimum interval between successive page writes; impacts firmware write-loop timing |
| Endurance | 1,000,000 erase/write cycles - guarantees long-term reliability for frequently updated configuration data |
| Data Retention | 200 years at +25°C - ensures persistent storage of critical calibration or security parameters over product lifetime |
| Standby Current | 1 µA maximum (I-temp.) - enables ultra-low-power operation in battery-backed or energy-harvesting systems |
Pinout & Package
24LC04B-I/MC is supplied in an 8-lead DFN (Dual Flat No-lead) package with wettable flanks, measuring 2 mm × 3 mm × 0.75 mm (typical), optimized for automated optical inspection (AOI) and 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 operation |
| A1 | Address Input | No internal connection; unused per device architecture; no impact on I²C addressing |
| A2 | Address Input | No internal connection; functionally inert; does not participate in slave address generation |
| VSS | Ground Reference | Primary return path for all internal circuitry; must be low-impedance to ensure noise immunity |
| SDA | Serial Data I/O | Open-drain bidirectional bus line requiring external pull-up; transmits addresses, data, and ACK/NACK |
| SCL | Serial Clock Input | Master-generated clock synchronizing all I²C transactions; edge-sensitive timing governs setup/hold windows |
| WP | Write-Protect Control | Logic-high disables all write operations (byte/page); logic-low enables full read/write access |
| VCC | Power Supply | Single 2.5–5.5V supply powering EEPROM core, interface logic, and charge pump for write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Provides 0.05×VCC hysteresis on SDA/SCL to reject bus noise up to 50 ns spikes without false triggering |
| Output slope control | Slows signal edges to eliminate ground bounce during switching-critical for stable I²C communication in mixed-signal PCBs |
| 16-byte page write buffer | Reduces I²C transaction count by up to 16× versus byte-write mode, improving firmware efficiency and bus utilization |
| Hardware write-protection | Physically disables write operations when WP = VCC-prevents accidental or malicious firmware corruption without software overhead |
| ESD protection >4 kV | Meets HBM Class 2 requirements, enabling robust handling during assembly and field service without external protection diodes |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in pressure, temperature, or flow sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 200-year data retention and 1M-cycle endurance for field recalibration events. Use Value: Eliminates need for external calibration trimmers or reprogramming jigs; enables one-time factory programming and field updates via I²C. |
Use Scenario: Holding user-selectable therapy parameters, device ID, usage counters, and safety-critical defaults in portable infusion pumps or diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store with hardware write-protection (WP pin) to prevent unauthorized modification. Use Value: Meets IEC 62304 software safety requirements by isolating configuration from main MCU flash; supports audit-ready traceability. |
| Automotive Body Control Module | Consumer Appliance Settings |
|
Use Scenario: Retaining seat/mirror position memory, lighting profiles, and door lock preferences in 12V automotive ECUs. IC Role / Device Role / Timing Role: AEC-Q100 qualified EEPROM interfacing directly with CAN/LIN gateway MCUs via I²C for low-pin-count integration. Use Value: Operates reliably across –40°C to +125°C ambient; withstands load-dump transients due to internal charge-pump isolation. |
Use Scenario: Saving user preferences (cook time, temperature, cycle type) and maintenance logs (filter replacement counter) in smart ovens and washing machines. IC Role / Device Role / Timing Role: Low-power (1 µA standby) memory enabling battery-backed settings retention during AC power loss. Use Value: Enables "instant-on" UX with zero boot-time configuration reload; eliminates capacitor-based backup solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 24AA04-I/MC | Wider VCC range (1.7–5.5V); supports 100 kHz below 2.5V; same 4-Kbit capacity and pinout | Better suited for 1.8V/2.5V systems; lacks extended temp grade option; lower max clock limits performance in high-speed buses | Select when operating below 2.5V or requiring broader voltage flexibility; verify I²C controller compatibility with reduced clock rates |
| AT24C04-SSHM-T | Same 4-Kbit size, I²C interface, and 8-lead SOIC package; rated for industrial temp only; 1 MHz max clock | Offers faster write cycles (max 10 ms vs. 5 ms) but higher standby current (3 µA vs. 1 µA); different manufacturer qualification | Choose for legacy SOIC footprint compatibility or where higher clock speed justifies increased power; confirm AEC-Q100 not required |
Compared with 24LC04B-I/MC, the 24AA04-I/MC extends voltage range downward at the cost of speed, while the AT24C04-SSHM-T trades lower power for higher speed and different qualification-making 24LC04B-I/MC optimal for 2.5–5.5V industrial designs prioritizing ultra-low standby current and AEC-Q100 readiness.
Availability
24LC04B-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 obsolescence management, and RoHS-compliant sourcing.
Supply support for 24LC04B-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 24LC04B belongs to Microchip's 24XX04 family of I²C serial EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in space-constrained embedded systems across industrial, automotive, and medical markets.
FAQ
What is the operating voltage range for the 24LC04B-I/MC?
The 24LC04B-I/MC operates from 2.5V to 5.5V. Unlike the 24AA04 or 24FC04 variants, it does not support voltages below 2.5V-this is a hard specification limit confirmed in the DC characteristics table under Industrial temperature conditions. Operation outside this range may result in undefined behavior or failure to acknowledge I²C commands.
Does the 24LC04B-I/MC support page write operations?
Yes, the 24LC04B-I/MC supports page write operations with a 16-byte buffer. Each page write must remain within a single 16-byte physical boundary (e.g., addresses 00h–0Fh, 10h–1Fh); crossing boundaries causes wraparound within the same page. This capability reduces I²C transaction overhead compared to byte-write mode and is fully supported across its specified VCC and temperature ranges.
How does the WP pin function on the 24LC04B-I/MC?
The WP (Write-Protect) pin on the 24LC04B-I/MC is a logic-level input: when tied to VCC, it disables all write operations (byte and page) across the entire 000h–1FFh memory space while allowing unrestricted reads; when tied to VSS or left floating, full read/write access is enabled. This hardware-level protection requires no firmware intervention and is active immediately upon power-up.
Is the 24LC04B-I/MC AEC-Q100 qualified?
Yes, the 24LC04B-I/MC is explicitly listed as Automotive AEC-Q100 qualified in the official Microchip datasheet (DS20001708P, page 1). This qualification covers stress testing for temperature cycling, humidity, ESD, and other automotive-grade reliability requirements-making it suitable for use in body control modules, infotainment interfaces, and other vehicle subsystems.
What packages are available for the 24LC04B-I/MC?
The 24LC04B-I/MC is offered in multiple packages including 8-Lead DFN (MC), 8-Lead MSOP (MS), 8-Lead PDIP (P), 8-Lead SOIC (SN), 5-Lead SOT-23 (OT), 8-Lead TDFN (MNY), 8-Lead TSSOP (ST), 8-Lead UDFN, and 8-Lead Wettable Flanks UDFN. The "/MC" suffix specifically denotes the 8-Lead DFN variant with wettable flanks for enhanced solder-joint inspection.
24LC04B-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tube
- 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-DFN (2x3)
24LC04B-I/MC FAQ
1.How can I place an order for 24LC04B-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 24LC04B-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 24LC04B-I/MC reliable?
The price and inventory of 24LC04B-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 24LC04B-I/MC is usually 5 days.
3.What payment methods are accepted for 24LC04B-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 24LC04B-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 24LC04B-I/MC?
24LC04B-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 24LC04B-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 24LC04B-I/MC?
For technical support, including 24LC04B-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 24LC04B-I/MC requirements.
6.How does Aetrix verify that 24LC04B-I/MC is sourced from the original manufacturer or authorized distributors?
All 24LC04B-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 24LC04B-I/MC meets industry standards.
7.What is the process for return or replacement of 24LC04B-I/MC?
All 24LC04B-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 24LC04B-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 24LC04B-I/MC part is unused and in its original packaging.
Return procedure for 24LC04B-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
24LC04B-I/MC Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
