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STMicroelectronics M24C04-WMN6P
- Part No.:
- M24C04-WMN6P
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M24C04-WMN6P.pdf
- Description:
- IC EEPROM 4KBIT I2C 400KHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,727
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Product details
Overview
M24C04-WMN6P from STMicroelectronics is a 4-Kbit I²C-compatible serial EEPROM organized as 512 × 8 bits, operating at up to 400 kHz clock frequency with 2.5 V to 5.5 V supply voltage. It features 16-byte page write capability, 4 million write cycles endurance, and 200-year data retention at 55 °C. Used for firmware parameter storage in industrial controllers and sensor calibration data logging.
For engineers reviewing the M24C04-WMN6P datasheet, M24C04-WMN6P pinout, M24C04-WMN6P application, or M24C04-WMN6P equivalent, key selection criteria include I²C bus timing compliance, WC-controlled hardware write protection, SO8N (ECOPACK2) package compatibility, and guaranteed operation across –40 °C to +85 °C ambient range.
Technical Context
The M24C04-WMN6P implements a standard I²C slave protocol with start/stop detection, 7-bit device addressing (1010xxA8), and ACK/NACK handshaking. Its internal architecture includes a page latch, HV generator for write operations, and automatic address counter increment during sequential reads.
It supports three read modes - random address, current address, and sequential - all independent of WC state, and enforces hardware-level write protection when WC is high. The device integrates power-on-reset (POR) circuitry to prevent spurious writes during power ramp-up or down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Kbit (512 × 8 bits), sufficient for storing configuration registers or calibration coefficients in compact embedded systems. |
| I²C clock frequency | Up to 400 kHz, enabling fast parameter updates without requiring high-speed MCU peripherals. |
| Supply voltage range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level shifting. |
| Write cycle time | ≤5 ms per byte or page - deterministic timing allows precise host-side polling or timeout handling. |
| Data retention | 200 years at 55 °C - ensures long-term reliability in unattended equipment like utility meters or remote sensors. |
| Endurance | 4 million write cycles at 25 °C - supports frequent field-updatable parameters in test instrumentation or PLC modules. |
| Operating temperature | –40 °C to +85 °C - qualified for industrial automation, automotive body control, and outdoor IoT gateways. |
Pinout & Package
Package: SO8N (ECOPACK2), 150 mil width, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: E2 | Chip enable (MSB of device address) | Hardwired to VCC or VSS to set b3b2 = 10, 00, 01, or 11; determines I²C slave address on shared bus. |
| 2: VSS | Ground reference | Common return path for all signals; must be low-impedance to ensure noise immunity during SDA transitions. |
| 3: SCL | Serial clock input | Master-generated clock synchronizing all data transfers; requires external pull-up resistor (typically 2.2–10 kΩ). |
| 4: WC | Write control input | Active-high hardware lock: disables all write operations (byte/page) while preserving read functionality. |
| 5: NC | No connection | Not bonded in SO8N package; left unconnected per design - no routing or termination required. |
| 6: VCC | Supply voltage | 2.5–5.5 V DC input; requires local 10–100 nF decoupling capacitor near pins 6/2 to suppress switching noise. |
| 7: SDA | Serial data bidirectional line | Open-drain I/O requiring external pull-up; supports wired-AND with other I²C devices on same bus segment. |
| 8: E1 | Chip enable (LSB of device address) | Paired with E2 to configure full 7-bit I²C address; floating defaults to logic 0, but stable biasing is recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection via WC pin | Prevents accidental overwrites during power transients or firmware bugs - no software dependency required. |
| Page write (16 bytes) | Reduces I²C transaction overhead by up to 16× vs. byte writes, accelerating bulk configuration updates. |
| Enhanced ESD/latch-up protection | Withstands ±3000 V HBM ESD - improves robustness in handling-sensitive manufacturing and field service environments. |
| Automatic address roll-over in sequential read | Enables continuous streaming from end-of-memory back to start without host-side address wrap logic. |
| Power-on reset (POR) circuit | Guarantees device remains unresponsive until VCC stabilizes within operating range - eliminates startup glitches. |
Applications
| Industrial Sensor Calibration | Smart Meter Firmware Storage |
|---|---|
|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during boot or recalibration routines via I²C. Use Value: Enables field-replaceable sensor modules without reprogramming MCU firmware - coefficients persist across power cycles and firmware updates. |
Use Scenario: Holding tariff tables, billing counters, and communication stack configuration in electricity/water meters. IC Role / Device Role / Timing Role: Secure, low-power memory for critical metering data updated infrequently but read continuously. Use Value: Meets IEC 62056 requirements for data integrity under brownout conditions - WC pin prevents corruption during grid instability. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
|
Use Scenario: Saving user preferences (mirror position, seat settings) and fault logs in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: I²C slave memory interfaced to 3.3 V microcontroller with extended voltage tolerance (2.5–5.5 V). Use Value: Operates reliably across automotive battery voltage swings (9–16 V) using simple LDO - no additional level-shifting needed. |
Use Scenario: Storing calibration curves and safety-critical self-test results in portable ultrasound or ECG analyzers. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with hardware write lock activated during diagnostic mode. Use Value: WC pin enables secure "lock-down" of calibration data post-certification - meets FDA 21 CFR Part 11 audit trail requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C04D-SSHM-T (Microchip) | Same 4-Kbit capacity, 1.7–5.5 V supply, but lacks WC pin - write protection relies solely on software address locking. | Requires firmware-level access control; unsuitable where hardware-enforced lockout is mandated (e.g., medical device certification). | Select when cost sensitivity outweighs need for hardware write disable, and system already implements robust I²C command filtering. |
| BR24G04FJ-WE2 (ROHM) | Identical SO8N package and pinout, 1.7–5.5 V operation, but rated only to 1 million write cycles and 100-year retention at 85 °C. | Lower endurance limits use in high-write-frequency applications like real-time logging or adaptive learning systems. | Choose for consumer-grade products with shorter lifecycle expectations and lower qualification burden. |
Compared with AT24C04D-SSHM-T and BR24G04FJ-WE2, the M24C04-WMN6P uniquely combines hardware WC-based write disable, 4 million write cycles, and 200-year data retention - making it optimal for industrial and regulated equipment where data integrity is non-negotiable.
Availability
M24C04-WMN6P is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter firmware storage, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for M24C04-WMN6P 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, and memory solutions for industrial, automotive, and consumer markets.
The M24C04 series belongs to ST's serial EEPROM product line, engineered specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained and thermally demanding embedded systems.
FAQ
What is the function of the WC pin on M24C04-WMN6P?
The WC (Write Control) pin is an active-high hardware lock that disables all write operations - including byte and page writes - while leaving read functionality fully operational. When driven high, the device acknowledges device select and address bytes but returns NACK on data bytes, preventing unintended memory modification during power transitions or firmware errors.
Can M24C04-WMN6P operate on a 3.3 V I²C bus with 5 V-tolerant SDA/SCL?
Yes - the M24C04-WMN6P operates natively from 2.5 V to 5.5 V and accepts I²C signal levels referenced to its own VCC. Its SDA pin is open-drain with 8 pF input capacitance, compatible with standard 3.3 V pull-ups. No level shifter is needed when interfacing with 3.3 V MCUs, provided VCC is set to 3.3 V and bus timing complies with 400 kHz AC specs.
Does the SO8N package of M24C04-WMN6P include exposed thermal pad?
No - the SO8N (ECOPACK2) package used for M24C04-WMN6P is a standard plastic small-outline IC with 150 mil width and no exposed thermal pad. Thermal dissipation relies on PCB copper area connected to pins 2 (VSS) and 6 (VCC); junction-to-ambient thermal resistance is specified at 140 °C/W under JEDEC JESD51-7 conditions.
How does the device handle sequential read beyond the last memory address (0x1FF)?
During sequential read, the internal address counter automatically rolls over from 0x1FF to 0x00, allowing continuous data streaming without host intervention. This behavior is guaranteed for SO8N, TSSOP8, and UFDFPN8 packages. Note: DFN5-package variants do not support roll-over and return undefined data after 0x1FF.
M24C04-WMN6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8
- 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
M24C04-WMN6P FAQ
1.How can I place an order for M24C04-WMN6P through Aetrix?
Please submit a Request for Quotation (RFQ) for M24C04-WMN6P 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 M24C04-WMN6P reliable?
The price and inventory of M24C04-WMN6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C04-WMN6P is usually 5 days.
3.What payment methods are accepted for M24C04-WMN6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C04-WMN6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24C04-WMN6P?
M24C04-WMN6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24C04-WMN6P 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 M24C04-WMN6P?
For technical support, including M24C04-WMN6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C04-WMN6P requirements.
6.How does Aetrix verify that M24C04-WMN6P is sourced from the original manufacturer or authorized distributors?
All M24C04-WMN6P 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 M24C04-WMN6P meets industry standards.
7.What is the process for return or replacement of M24C04-WMN6P?
All M24C04-WMN6P units undergo pre-shipment inspection (PSI). If there is an issue with M24C04-WMN6P, 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 M24C04-WMN6P part is unused and in its original packaging.
Return procedure for M24C04-WMN6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M24C04-WMN6P Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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24AA02UIDT-I/OT
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