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Home > Products > Integrated Circuits (ICs) > Memory > Memory

STMicroelectronics M24C01-WMN6P

Name: M24C01-WMN6P
Brand: STMicroelectronics
SKU: M24C01-WMN6P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M24C01-WMN6P

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: M24C01-WMN6P.pdf

Description:: IC EEPROM 1KBIT I2C 400KHZ 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

M24C01-WMN6P from STMicroelectronics is a 1-Kbit (128-byte) I²C-compatible serial EEPROM organized as 128 × 8 bits, operating as a slave device on standard and fast-mode I²C buses up to 400 kHz. It supports 2.5 V to 5.5 V supply voltage, -40 °C to +85 °C operation, hardware write protection via WC pin, and 16-byte page write capability - deployed in industrial control panels for parameter storage and calibration data retention.

For engineers reviewing the M24C01-WMN6P datasheet, M24C01-WMN6P pinout, M24C01-WMN6P application, or M24C01-WMN6P equivalent, key selection considerations include I²C address configuration (E0–E2), WC-controlled full-array write lock, SO8N ECOPACK2 package compatibility, and guaranteed 4 million write cycles with 200-year data retention at 55 °C.

Technical Context

The M24C01-WMN6P implements a synchronous I²C slave interface with start/stop detection, ACK/NACK handshaking, and internal address counter auto-increment during sequential reads. Its block diagram includes HV generator + sequencer for EEPROM programming, page latches for 16-byte burst writes, and SDA open-drain I/O requiring external pull-up.

Device addressing uses a fixed 7-bit code (1010xxx) where E0–E2 pins set the three LSBs; in the SO8N package (MN), all three are bonded and accessible. Write control (WC) disables all write operations when high, independent of clock or address - a hardware-level safeguard against corruption during power transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	1-Kbit (128 × 8 bits) - sufficient for firmware revision flags, sensor calibration coefficients, or small configuration tables.
I²C clock frequency	Up to 400 kHz (Fast mode) - enables ~1.6 ms max byte write time and supports real-time parameter updates in responsive systems.
Supply voltage range	2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level-shifting in mixed-voltage designs.
Write endurance	4 million write cycles at 25 °C - supports daily reconfiguration over 10+ years in field-deployed equipment.
Data retention	200 years at 55 °C - ensures long-term reliability for unattended infrastructure devices like smart meters or remote sensors.
Operating temperature	-40 °C to +85 °C - validated for use in automotive body control modules and industrial PLC I/O expansion cards.
Page size	16 bytes - optimizes firmware patching efficiency while minimizing bus occupancy during bulk writes.

Pinout & Package

Package: SO8N (ECOPACK2), 150 mil width, RoHS-compliant and halogen-free.

Pin/Terminal	Circuit Role	Design Meaning
VSS	Ground reference	Common return path for all signals and VCC decoupling; must be low-impedance connection to minimize noise coupling.
WC	Hardware write control	Active-high signal that globally disables all write operations - tied high for permanent protection or controlled by MCU GPIO for selective locking.
E1	Chip enable bit 1	Configures 2nd LSB of 7-bit I²C address (1010xxx); must be hard-wired to VCC or VSS - floating defaults to logic 0.
E0	Chip enable bit 0	Configures LSB of I²C address; determines unique bus address among up to eight M24C01-W devices sharing one I²C segment.
VCC	Supply voltage	2.5–5.5 V DC input; requires local 10–100 nF ceramic decoupling capacitor placed adjacent to pin.
E2	Chip enable bit 2	Configures 3rd LSB of I²C address; enables multi-device topology without software address remapping.
SCL	Serial clock input	Master-generated clock (≤400 kHz); rise/fall time ≤50 ns; defines timing for SDA sampling on rising edge.
SDA	Serial data I/O	Open-drain bidirectional line; requires external pull-up resistor (value calculated per Figure 11 in DS9398); supports wired-AND bus sharing.

Key Features

Feature	Design Value
Hardware write protection (WC pin)	Prevents accidental writes during power-up/down or firmware glitches - no software dependency required for critical memory safety.
16-byte page write capability	Reduces I²C transaction overhead by 87% vs. single-byte writes for contiguous data blocks like calibration arrays.
Enhanced ESD/latch-up protection	Withstands ±3000 V HBM ESD pulses - eliminates need for external TVS diodes in cost-sensitive consumer and industrial PCBs.
Random and sequential read modes	Enables efficient firmware boot loading (sequential) and dynamic parameter lookup (random) without address retransmission.
Power-on reset (POR) circuit	Blocks instruction execution until VCC stabilizes above threshold - prevents spurious writes during brown-out conditions.

Applications

Industrial Sensor Calibration

Smart Meter Firmware Storage

Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers.

IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed at system boot and during field recalibration via I²C.

Use Value: Enables traceable, field-updatable calibration without requiring MCU flash reprogramming or external programming fixtures.

Use Scenario: Holding tariff tables, metering constants, and security keys in utility-grade electricity meters with 10+ year field life.

IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store synchronized with metrology IC via I²C at power-on.

Use Value: Meets IEC 62056-21 requirements for data integrity with 200-year retention and hardware write lock during firmware updates.

Automotive Body Control Module

IoT Edge Device Configuration

Use Scenario: Saving user preferences (window position, mirror angle, seat settings) in 12 V automotive BCMs operating across cold cranking conditions.

IC Role / Device Role / Timing Role: Low-voltage-tolerant EEPROM interfaced directly to 3.3 V microcontroller I²C peripheral.

Use Value: Guaranteed operation down to 2.5 V allows reliable parameter save during battery voltage sag below 9 V.

Use Scenario: Storing Wi-Fi credentials, OTA update signatures, and device-specific identifiers in battery-powered environmental monitors.

IC Role / Device Role / Timing Role: Power-fail-safe configuration vault accessed only during initialization or secure provisioning events.

Use Value: 4 million write cycles support frequent credential rotation in zero-touch deployment workflows without wear-out risk.

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT24C01D-SSHM-T (Microchip)	1-Kbit, 1.7–5.5 V supply, 400 kHz I²C, same SO8 package but no WC pin.	Lacks hardware write protection - requires software-based lock mechanisms or external logic for equivalent security.	Select when WC functionality is unnecessary and lower minimum voltage (1.7 V) is prioritized over write-lock assurance.
BR24G01FJ-WE2 (ROHM)	1-Kbit, 1.6–5.5 V, 400 kHz I²C, SO8N, includes WC pin and identical E0–E2 addressing.	Same functional footprint and protection scheme; differs in AC timing specs (t_BUF, t_HD:STA) and ESD rating (±2000 V HBM).	Choose for drop-in replacement where tighter timing margins or higher ESD immunity are not design-critical.

Compared with AT24C01D-SSHM-T and BR24G01FJ-WE2, the M24C01-WMN6P provides guaranteed 4 million write cycles at 25 °C and integrated POR - making it preferable for mission-critical industrial and automotive applications where write reliability and power-up safety are non-negotiable.

Availability

M24C01-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 product lifecycles.

Supply support for M24C01-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, designing and manufacturing microcontrollers, power management ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M24C01-W series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, I²C-based nonvolatile storage in space-constrained and thermally demanding environments.

FAQ

What is the function of the WC pin on M24C01-WMN6P?

The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. When WC is low or floating, writes are enabled. This feature prevents accidental overwrites during power transitions or firmware errors - no software intervention is required for protection.

Can M24C01-WMN6P operate at 1.8 V?

No. The M24C01-WMN6P variant is rated for 2.5 V to 5.5 V operation only. For 1.8 V compatibility, ST offers the M24C01-R series (e.g., M24C01-RMN6TP), which shares identical pinout and functionality but extends the lower supply limit to 1.8 V while maintaining the same -40 °C to +85 °C temperature range.

How many unique I²C addresses can be configured using E0–E2 pins?

The E0, E1, and E2 pins configure the three least significant bits of the 7-bit I²C device address (1010xxx), enabling up to eight unique addresses (000 to 111 binary) on the same bus. All three pins must be hard-wired to VCC or VSS; floating pins default to logic 0, limiting address flexibility if left unconnected.

Is the SO8N package of M24C01-WMN6P lead-free and RoHS-compliant?

Yes. The SO8N package is ECOPACK2 certified - fully RoHS-compliant (2011/65/EU) and halogen-free, with lead-free matte tin terminations. It meets JEDEC J-STD-020 reflow profiles and supports both Sn-Pb and Pb-free soldering processes without derating.

M24C01-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:: 1Kbit

Memory Organization:: 128 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

M24C01-WMN6P FAQ

1.How can I place an order for M24C01-WMN6P through Aetrix?

Please submit a Request for Quotation (RFQ) for M24C01-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 M24C01-WMN6P reliable?

The price and inventory of M24C01-WMN6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24C01-WMN6P is usually 5 days.

3.What payment methods are accepted for M24C01-WMN6P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24C01-WMN6P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M24C01-WMN6P?

M24C01-WMN6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M24C01-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 M24C01-WMN6P?

For technical support, including M24C01-WMN6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24C01-WMN6P requirements.

6.How does Aetrix verify that M24C01-WMN6P is sourced from the original manufacturer or authorized distributors?

All M24C01-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 M24C01-WMN6P meets industry standards.

7.What is the process for return or replacement of M24C01-WMN6P?

All M24C01-WMN6P units undergo pre-shipment inspection (PSI). If there is an issue with M24C01-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 M24C01-WMN6P part is unused and in its original packaging.

Return procedure for M24C01-WMN6P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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