STMicroelectronics M24512E-FDW6TP

Overview

M24512E-FDW6TP from STMicroelectronics is a 512-Kbit (64-Kbyte) I²C-compatible serial EEPROM organized as 64 K × 8 bits, operating from 1.6 V to 5.5 V with 1 MHz Fast-mode Plus support, -40 °C to +85 °C industrial temperature range, and 128-byte identification page for secure parameter storage. It serves as nonvolatile configuration memory in microcontroller-based systems requiring field-updatable calibration data, device identity, or firmware metadata.

For engineers reviewing the M24512E-FDW6TP datasheet, M24512E-FDW6TP pinout, M24512E-FDW6TP application, or M24512E-FDW6TP equivalent, key selection criteria include configurable I²C address (C2–C0), software/hardware write protection granularity, 4 ms typical page write time, and ECOPACK2-compliant SO8N/TSSOP8/UFDFPN8 packaging for space-constrained embedded designs.

Technical Context

The M24512E-FDW6TP implements a dedicated I²C target interface with open-drain SDA and input-only SCL, supporting Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz) clock rates. Its internal architecture includes an HV generator and sequencer for EEPROM programming, ECC-enabled sense amplifiers, and dual-latch address/data registers for reliable random/sequential read and page write operations.

Three user-accessible 8-bit registers - Device Type Identifier (DTI), Configurable Device Address (CDA), and Software Write Protection (SWP) - are mapped via dedicated I²C command codes (MSB address = 111, 110, 101 respectively). The identification page (128 bytes) is writable until permanently locked in read-only mode using DTI/CDA/SWP register protocols, enabling one-time provisioning of immutable device-specific parameters.

Key Specifications

Pinout & Package

Available in SO8N (150 mil width), TSSOP8 (169 mil width), and UFDFPN8 (2×3 mm) ECOPACK2 packages. Pin numbering follows standard 8-pin top-view layout with pin 1 marked by notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C512-SSHL-T and BR24G512FJ-3GE2, the M24512E-FDW6TP uniquely integrates configurable addressing, software-defined block protection, and a permanently lockable identification page - enabling higher security, reduced external components, and simplified qualification for regulated end equipment.

Availability

M24512E-FDW6TP is available at Aetrix Electronics and suitable for smart metering, industrial PLC I/O modules, medical diagnostic sensors, and automotive body control units requiring stable component supply, long-term lifecycle support, and ECOPACK2-compliant packaging.

Supply support for M24512E-FDW6TP 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 M24512E-FDW6TP belongs to ST's M24 series of I²C EEPROMs engineered for robustness in harsh environments, featuring enhanced ESD/latch-up immunity, extended voltage range, and advanced register-based security features for mission-critical embedded systems.

FAQ

What is the function of the WC pin on the M24512E-FDW6TP?

The WC (Write Control) pin is an active-high hardware write protect input. When driven high, it disables all write operations to the entire memory array - including page writes, identification page writes, and register updates - while still allowing read access and acknowledgment of device select codes. This provides fail-safe protection against unintended writes during power-up, brown-out, or firmware errors, and is independent of software write protection settings.

How does the identification page differ from standard EEPROM memory?

The identification page is a dedicated 128-byte memory region accessible via unique I²C command codes (MSB address = 000). Unlike main memory, it can be permanently locked in read-only mode using the DTI/CDA/SWP register protocol, preventing any further writes after initial provisioning. It is factory-initialized to 0xFF and intended for storing immutable data such as calibration coefficients, device serial numbers, or cryptographic keys that must survive field updates.

Can the configurable device address be changed after power-up?

Yes - the configurable device address (C2/C1/C0 bits in the CDA register) can be rewritten at any time when the DAL (Device Address Lock) bit is 0. However, setting DAL = 1 permanently freezes the CDA register in read-only mode, making the address immutable. For M24512E-FDW6TP, the "DW6" suffix indicates delivery with preprogrammed address and DAL = 1, so address reconfiguration is disabled and only read access is permitted.

What I²C clock frequencies does the M24512E-FDW6TP support, and how is mode selection handled?

The M24512E-FDW6TP supports Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz) I²C clock frequencies. Mode selection is automatic and determined solely by the SCL clock rate applied by the master - no configuration bits or external components are required. Internal timing circuits adapt to the incoming clock, ensuring reliable ACK/NACK generation and data sampling across all supported speeds without software intervention.