STMicroelectronics M24128-BRMN6P

Overview

M24128-BRMN6P from STMicroelectronics is a 128-Kbit (16-Kbyte) I²C-compatible serial EEPROM organized as 16 K × 8 bits, operating across 1.7 V to 5.5 V at -40 °C to +85 °C. It supports 1 MHz Fast-mode Plus, 400 kHz Fast-mode, and 100 kHz Standard-mode I²C bus protocols, features 64-byte page write capability, hardware write protection via WC pin, and delivers >4 million write cycles with >200-year data retention.

For engineers reviewing the M24128-BRMN6P datasheet, M24128-BRMN6P pinout, M24128-BRMN6P application, or M24128-BRMN6P equivalent, key selection considerations include supply voltage range compatibility (1.7–5.5 V), I²C clock mode support (up to 1 MHz), page write timing (≤5 ms), WC-controlled hardware write lock, and package-specific chip enable behavior in DFN5 and WLCSP variants.

Technical Context

This device implements a fully I²C-compliant target interface with start/stop detection, ACK/NACK handshaking, and 7-bit device addressing with three programmable chip-enable inputs (E2–E0). Its internal architecture includes an HV generator, ECC logic (on process-A/K variants), page latches, and a sequencer enabling atomic 64-byte page writes without external address management.

Write control (WC) operates as a hardwired inhibit: when high, all data bytes are rejected with NO ACK while device select and address bytes remain acknowledged. The identification page (64 bytes, M24128-D variant only) supports permanent read-only locking via dedicated instruction with A10=1, but M24128-BRMN6P is not the -D variant and lacks this feature.

Key Specifications

Pinout & Package

Package: UFDFPN8 (2 mm × 3 mm, ECOPACK2-compliant DFN8). Pin numbering follows top-view marking-side orientation with pin 1 at bottom-left corner (see ST DS6639 Fig. 3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C128C-SSHL-T and BR24G128FJ-WE2, M24128-BRMN6P uniquely combines industrial-grade temperature range, hardware WC lock, and ECOPACK2-compliant DFN8 packaging-making it optimal for space-constrained, safety-critical embedded systems requiring guaranteed write integrity.

Availability

M24128-BRMN6P is available at Aetrix Electronics and suitable for smart metering, automotive body control units, industrial HMI panels, and medical diagnostic equipment requiring stable component supply across extended temperature and voltage ranges.

Supply support for M24128-BRMN6P 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-BRMN6P belongs to ST's M24 serial EEPROM product line, engineered for robust, low-power, I²C-based nonvolatile storage in space- and reliability-constrained embedded systems.

FAQ

Does M24128-BRMN6P support the identification page feature?

No. The identification page (64-byte locked read-only area) is exclusive to M24128-D variants (e.g., M24128-DF). M24128-BRMN6P is a standard -BR version and does not implement the 1011 device type identifier or lock ID instruction. Its memory map consists solely of the main 16-Kbyte array.

What is the function of the E0, E1, and E2 pins in the UFDFPN8 package?

In the UFDFPN8 (2 × 3 mm) package, E0, E1, and E2 are bonded but not routed to external terminals-they are internally tied low. Therefore, the device always responds to I²C address 0xA0 (1010000b) for memory array access, regardless of external connections. This simplifies design but removes address multiplexing capability.

Can M24128-BRMN6P operate reliably at 1.6 V?

No. M24128-BRMN6P is rated for 1.7 V minimum supply voltage across its full -40°C to +85°C operating range. While some -BF/-DF variants support 1.6 V under restricted conditions (e.g., limited temperature range or reduced speed), the -BR suffix explicitly specifies 1.7 V as the absolute lower limit per DS6639 Rev 33.

Is ECC (error correction code) implemented in M24128-BRMN6P?

ECC is present only in devices marked with process letters A or K (e.g., M24128-BRMN6PT/A or /K). Standard M24128-BRMN6P units (no process suffix) do not include ECC logic. When ECC is absent, single-bit errors are not corrected during read-designers must implement application-level CRC or redundancy if required.