STMicroelectronics M24M01-DFCS6TP/K

Overview

M24M01-DFCS6TP/K from STMicroelectronics is a 1-Mbit I²C serial EEPROM organized as 128 K × 8 bits, operating from 1.7 V to 5.5 V across –40 °C to +85 °C. It supports 1 MHz I²C bus speed, features 256-byte page write (≤5 ms), and includes an additional lockable Identification Page for secure parameter storage - used in industrial control modules for firmware revision tracking and calibration data persistence.

For engineers reviewing the M24M01-DFCS6TP/K datasheet, M24M01-DFCS6TP/K pinout, M24M01-DFCS6TP/K application, or M24M01-DFCS6TP/K equivalent, key selection criteria include I²C voltage range compatibility (1.7–5.5 V), guaranteed 4 million write cycles, 200-year data retention, WC-controlled full-memory write protection, and SO8 ECOPACK2® package footprint compliance.

Technical Context

The device implements a standard I²C slave interface with dual Chip Enable inputs (E1, E2) that configure the upper two bits of the 7-bit device address, enabling up to four devices on the same bus. Its internal high-voltage generator enables byte/page writes without external programming voltage.

It integrates power-on reset (POR) and enhanced ESD/latch-up protection, ensuring robust operation during supply ramp-up/down. The Write Control (WC) pin provides hardware-level memory lock: when driven high, all write operations (including Identification Page access) are inhibited while read and address acknowledgment remain functional.

Key Specifications

Pinout & Package

Package: SO8 ECOPACK2® (MN, 150 mil width), RoHS-compliant, surface-mount plastic small outline with standard 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24CM01-SSHD-T and BR24M10YFVM-WE2, M24M01-DFCS6TP/K uniquely delivers both 4 million write cycles and a lockable Identification Page - making it the only option among the three qualified for medical calibration vaults and industrial firmware metadata with permanent write lock assurance.

Availability

M24M01-DFCS6TP/K is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply, long-lifecycle support, and RoHS-compliant SO8 packaging.

Supply support for M24M01-DFCS6TP/K 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 ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M24M01 series belongs to ST's high-reliability serial EEPROM product line, engineered specifically for mission-critical nonvolatile storage in harsh environments - emphasizing extended data retention, wide voltage operation, and hardware-based write security.

FAQ

What is the function of the DU pin on M24M01-DFCS6TP/K?

Pin 8 is marked "DU" (Do Not Use) and has no internal connection. If physically routed on the PCB, it must be tied to VSS (ground); leaving it floating or driving it high/low may cause unpredictable behavior or increased leakage. This pin is reserved for future use and must not be assigned a signal function in layout.

Can the Identification Page be unlocked after being permanently locked?

No - once the Identification Page is locked via the dedicated lock command sequence with WC = 1, the lock is irreversible. The page becomes permanently read-only for the device's lifetime. This one-time lock ensures tamper-proof storage of calibration or security parameters, and no factory or field method exists to restore write access.

How does the WC pin behave during power-up and brown-out conditions?

The WC pin is sampled after internal power-on reset (POR) completes. During power-up, the device ignores WC state until VCC exceeds the POR threshold (~1.2 V), then enters standby mode. If WC is high at that point, full write protection activates immediately. During brown-out, WC remains effective until VCC drops below the POR release threshold, preventing partial writes.

Is M24M01-DFCS6TP/K compatible with standard I²C bus pull-up resistor values?

Yes - it complies with standard I²C open-drain specifications. For 1 MHz operation, ST recommends a 1.8 kΩ pull-up to VCC (per Figure 13); for 400 kHz, 4.7 kΩ is typical. Bus capacitance must stay ≤400 pF to meet timing; actual resistor value depends on total bus capacitance and VCC level, as defined in Figures 12–13 of the datasheet.