STMicroelectronics M24C02-FMN6TP

Overview

M24C02-FMN6TP from STMicroelectronics is a 2-Kbit (256-byte) I²C-compatible serial EEPROM organized as 256 × 8 bits, operating as a slave device on standard and fast-mode I²C buses up to 400 kHz. It supports 1.7 V to 5.5 V supply across –40 °C to +85 °C, features hardware write protection via WC pin, 16-byte page write capability, and delivers >4 million write cycles with >200-year data retention - deployed in industrial sensor calibration storage and embedded system configuration memory.

For engineers reviewing the M24C02-FMN6TP datasheet, M24C02-FMN6TP pinout, M24C02-FMN6TP application, or M24C02-FMN6TP equivalent, key selection considerations include its 1.7 V minimum VCC operation at full temperature range, DFN5 (UFDFPN5) 5-pin package with unconnected E0–E2 pins, hardware write control (WC) logic, and I²C address compatibility with 1010xxxR/W format under constrained bus topology.

Technical Context

The M24C02-FMN6TP implements a synchronous I²C slave interface with start/stop detection, ACK/NACK handshaking, and internal address counter auto-increment. Its memory array uses floating-gate EEPROM technology with on-chip charge pump for byte/page write operations, and integrates a power-on-reset (POR) circuit that prevents spurious writes during VCC ramp-up.

It supports three read modes - random, current-address, and sequential - all independent of WC state, and enforces hardware-level write inhibition when WC is high. The DFN5 package omits E0–E2 pins, fixing device address bits b3–b1 to 000, requiring exclusive use of I²C address 0xA0–0xA7 with RW bit.

Key Specifications

Pinout & Package

Package: UFDFPN5 (ECOPACK2), 1.7 mm × 1.4 mm, 0.5 mm pitch, RoHS-compliant and halogen-free. Pin 1 marked by top-side dot; no exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C02D-SSHM-T and BR24G02FJ-3GE2, the M24C02-FMN6TP uniquely combines DFN5 miniaturization, active-high WC pin, and guaranteed 1.7 V operation across full industrial temperature range - making it optimal for space- and power-constrained embedded nodes where hardware write lock is mandatory.

Availability

M24C02-FMN6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, IoT edge device configuration, and automotive body control unit trim requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for M24C02-FMN6TP 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 M24C02-FMN6TP belongs to ST's M24C serial EEPROM product line, engineered specifically for reliable, low-voltage, I²C-based nonvolatile storage in space-constrained and power-sensitive embedded systems.

FAQ

What is the function of the WC pin on the M24C02-FMN6TP?

The WC (Write Control) pin is an active-high hardware enable for write operations. When driven high, it disables all byte and page writes to the entire memory array while allowing unrestricted read access. This provides deterministic, glitch-immune protection against accidental overwrites during power transitions or firmware faults - unlike software-only locks that depend on MCU execution state.

Does the M24C02-FMN6TP support I²C clock stretching?

No, the M24C02-FMN6TP does not implement clock stretching. It relies on fixed internal timing for ACK generation and write-cycle completion. Bus masters must observe the maximum write time (t_W = 5 ms) and use ACK polling (repeated START + device address until ACK received) to detect write completion before issuing subsequent commands.

How does the DFN5 package affect I²C addressing compared to SO8N or TSSOP8 variants?

In the DFN5 package, E0–E1–E2 pins are not bonded out, fixing the three least-significant address bits to 000. This restricts the device to I²C addresses 0xA0 (write) and 0xA1 (read) only. Unlike SO8N/TSSOP8 versions, no external address configuration is possible, eliminating bus conflicts but requiring dedicated address allocation on shared I²C segments.

Can the M24C02-FMN6TP retain data during extended power-off periods in automotive under-hood environments?

Yes - the device guarantees >200 years of data retention at 55 °C, validated per JEDEC JESD22-A117. At typical under-hood ambient temperatures (up to 85 °C), retention remains >10 years based on Arrhenius modeling. Its 1.7–5.5 V operation also supports direct connection to automotive 12 V systems via LDO, avoiding voltage translation losses.