STMicroelectronics M24128-BFMH6TG

Overview

M24128-BFMH6TG from STMicroelectronics is a 128-Kbit I²C-compatible serial EEPROM organized as 16 K × 8 bits, operating across 1.7 V–5.5 V supply and -40 °C to +85 °C ambient range. It supports 1 MHz Fast-mode Plus, 400 kHz Fast-mode, and 100 kHz Standard-mode I²C bus operation, features 64-byte page write capability, hardware write protection via WC pin, and includes enhanced ESD/latch-up protection with >4 million write cycles and >200-year data retention. It is used in industrial sensor calibration storage and embedded system configuration backup.

For engineers reviewing the M24128-BFMH6TG datasheet, M24128-BFMH6TG pinout, M24128-BFMH6TG application, or M24128-BFMH6TG equivalent, key selection considerations include I²C clock compatibility up to 1 MHz, 1.7 V minimum operating voltage, 64-byte page size for efficient firmware parameter updates, hardware write control (WC) for robust field-programming safety, and ECOPACK2-compliant TSSOP8 package suitability for space-constrained PCB layouts.

Technical Context

The device implements a standard I²C target protocol with 7-bit device address (1010xxxR/W), where E2–E0 pins configure the three LSBs of the address-on TSSOP8, these are bonded and fixed to logic low (000), yielding device address 0xA0 for memory array access. Internal architecture includes an ECC engine (process-dependent) that corrects single-bit errors per 4-byte group without protocol visibility.

Write operations require a STOP condition to trigger internal t_W ≤ 5 ms write cycle; polling on ACK enables host synchronization. Read modes support random, current-address, and sequential reads-with automatic address rollover at memory boundary-and are fully independent of WC state. The WC pin disables all writes when high, but allows address byte acknowledgment.

Key Specifications

Pinout & Package

Package: TSSOP8 (169 mil width), ECOPACK2-compliant, surface-mount, 8-pin thin shrink small outline package with exposed pad option not applicable. Pin 1 marked by notch or dot; pin numbering follows standard counter-clockwise convention from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C128C and BR24G128FJ, M24128-BFMH6TG uniquely combines 64-byte page writes, hardware WC pin, and 4M-cycle endurance in a TSSOP8 ECOPACK2 package - making it optimal for industrial and medical designs demanding both robustness and bus efficiency.

Availability

M24128-BFMH6TG is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and medical device bootloader settings requiring stable component supply across extended product lifecycles.

Supply support for M24128-BFMH6TG 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, designing and manufacturing microcontrollers, power ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

M24128-BFMH6TG belongs to the M24 serial EEPROM product line, engineered specifically for high-reliability, low-power, I²C-based non-volatile storage in space- and power-constrained embedded systems.

FAQ

Does M24128-BFMH6TG support 1 MHz I²C operation across its full temperature range?

Yes, M24128-BFMH6TG guarantees 1 MHz Fast-mode Plus I²C operation from -40 °C to +85 °C, as confirmed in DS6639 Rev 33 Section 8 AC characteristics. This includes full timing compliance for setup, hold, and pulse widths under worst-case voltage (1.7 V) and temperature conditions - no derating required for industrial use cases.

What is the function of the WC pin, and can it be left floating?

The WC (Write Control) pin disables all write operations when driven high. When left floating or pulled low, writes are enabled. Per Section 2.4 of DS6639, floating WC is interpreted as logic low - but for robust field operation, ST recommends explicit pull-down to avoid noise-induced write inhibition. It does not affect read operations.

Is the identification page available on M24128-BFMH6TG?

No. The 64-byte identification page is exclusive to M24128-D variants (e.g., M24128-DF). M24128-BF series, including M24128-BFMH6TG, lacks this feature - its memory map consists solely of the main 16-Kbyte array. Device select code for ID page access (1011xxxx) is not recognized.

How does the ECC functionality behave in M24128-BFMH6TG?

ECC is process-dependent: present only in devices marked with process letter A or K (visible in top-marking laser code). When active, it transparently corrects single-bit errors per 4-byte group during reads. Writes to any byte in a group cycle all four bytes - so endurance is allocated at group level, not per byte, as defined in Table 11 of DS6639.