STMicroelectronics M24128-BRMN6TP

Overview

M24128-BRMN6TP from STMicroelectronics is a 128-Kbit (16-Kbyte) I²C-compatible serial EEPROM organized as 16 K × 8 bits, operating from 1.7 V to 5.5 V over –40 °C to +85 °C, supporting 1 MHz Fast-mode Plus, 400 kHz Fast-mode, and 100 kHz Standard-mode I²C bus protocols, with 64-byte page write capability and hardware write protection via WC pin - used in industrial sensor calibration storage and embedded system configuration retention.

For engineers reviewing the M24128-BRMN6TP datasheet, M24128-BRMN6TP pinout, M24128-BRMN6TP application, or M24128-BRMN6TP equivalent, key selection considerations include supply voltage range compatibility (1.7–5.5 V), I²C clock mode support (up to 1 MHz), page size (64 bytes), write endurance (>4 million cycles), and package-specific pin mapping for TSSOP8 and UFDFPN8 footprints.

Technical Context

The device implements a standard I²C target protocol with start/stop detection, ACK/NACK handshaking, and 7-bit device addressing with three chip-enable inputs (E2–E0) for multi-device bus arbitration. It uses internal high-voltage generation and ECC logic (on process-A/K variants) for single-bit error correction across 4-byte groups.

Memory access supports random address read (via dummy write + restart), current address read, and sequential read with automatic address rollover. Write operations are gated by the WC pin and trigger internal t_W ≤ 5 ms write cycles; polling on ACK enables host-driven readiness detection without fixed delays.

Key Specifications

Pinout & Package

Package: TSSOP8 (169 mil width) - surface-mount, gull-wing leads, RoHS-compliant ECOPACK2 footprint with exposed pad option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C128C and BR24G128FJ, M24128-BRMN6TP uniquely combines hardware WC-based write lock, 64-byte identification page, and ECC-enabled reliability - making it optimal for safety-critical or security-sensitive embedded storage where data integrity and permanent parameter binding are required.

Availability

M24128-BRMN6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and medical device settings backup requiring stable component supply, long-life data retention, and I²C bus compatibility across 1.7–5.5 V systems.

Supply support for M24128-BRMN6TP 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 management ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.

The M24128 series belongs to ST's serial EEPROM product line, engineered specifically for reliable, low-power, I²C-based nonvolatile storage in space-constrained and mission-critical embedded systems.

FAQ

What is the function of the WC pin on M24128-BRMN6TP?

The WC (Write Control) pin is a hardware-level write protection input. When driven high, it disables all write operations-including byte, page, and identification page writes-regardless of I²C command sequence. This prevents accidental or malicious modification during power transitions, firmware updates, or system faults. The pin is active-low enabled: floating or pulled low permits writes.

Does M24128-BRMN6TP support the identification page feature?

Yes - M24128-BRMN6TP includes a dedicated 64-byte identification page accessible via I²C device select code 1011xxxR/W. This page can be written once and permanently locked in read-only mode using the lock ID instruction. It is intended for storing immutable device-specific data such as serial numbers, calibration keys, or cryptographic seeds.

What package type does M24128-BRMN6TP use, and how is pin 1 identified?

M24128-BRMN6TP uses the TSSOP8 package (169 mil width). Pin 1 is located at the top-left corner when the marking side faces up and the notch or dot is oriented leftward. The pinout follows standard TSSOP orientation: VSS (1), WC (2), E1 (3), E0 (4), VCC (5), E2 (6), SCL (7), SDA (8).

How does ECC work in M24128-BRMN6TP, and which variants include it?

ECC (Error Correction Code) is implemented only in M24128 devices marked with process letters A or K - detectable in the full part number suffix. It operates transparently on 4-byte groups, correcting single-bit errors during read. When writing one byte, ECC logic also cycles the other three bytes in the same group, so endurance is shared across each 4-byte block - not per individual byte.