STMicroelectronics

M95128-WMN6TP

A: The M95128-WMN6TP offers a versatile feature set optimized for a wide operating voltage range and low power consumption. The table below summarises its core specifications, drawn directly from manufacturer data: Specification Value Memory Capacity 128 Kbit (16 Kbyte) Memory Organization 16K × 8 bits Memory Interface SPI bus (Serial Peripheral Interface) Clock Frequency (fSCLK) 10 MHz (max) Write Cycle Time (tW) 5 ms (max, self‑timed) Supply Voltage (VCC) 2.5 V to 5.5 V Write Endurance 4,000,000 (4 million) write cycles Data Retention 200 years Operating Temperature –40°C to +85°C (industrial grade) Package Type 8‑pin SOIC (SO8N) RoHS Status RoHS compliant, ECOPACK2® Additional features include: 32‑byte Page Write Mode – Supports writing up to 32 bytes of data in a single self‑timed write cycle, improving programming efficiency. Self‑timed Write Cycle – No external timing control required. Hardware Write Protection – Via the Write Protect (W) pin and programmable Block Protection bits. Software Write Protection – Configurable protection of the entire memory array or specific blocks using the Status Register (BP1, BP0, TB, etc.). Additional Write‑Lockable Identification Page – A separate 32‑byte page that can be permanently locked for storing unique device identification or security data. Built‑in ESD protection and Error Correction Code (ECC) for enhanced data integrity.

A: The M95128-WMN6TP uses a standard 4‑wire SPI (Serial Peripheral Interface) bus for communication, significantly reducing the number of I/O pins required for memory expansion. The interface consists of the following pins: S (Chip Select): Enables the device when driven low. C (Serial Clock): Provides the clock signal for data transfer. D (Serial Data Input): Transmits data from the host to the device. Q (Serial Data Output): Transmits data from the device to the host. In addition to the standard SPI signals, the device features: HOLD (Hold pin): Allows the host to interrupt and later resume a serial communication sequence without resetting the ongoing instruction. This is particularly useful in multi‑device SPI bus systems where the bus may need to be temporarily shared for higher‑priority tasks. W (Write Protect): Provides hardware write protection. When this pin is tied to VSS (ground), all write operations to the memory array (including the status register) are inhibited, offering a hardware method to protect critical data from accidental modification. The SPI interface is compatible with both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), ensuring seamless integration with the vast majority of microcontrollers and SoCs.

A: The M95128-WMN6TP is engineered for high‑reliability, long‑term data storage. The table below outlines its key reliability specifications: Reliability Parameter Specification Write Endurance 4,000,000 (4 million) write/erase cycles (minimum) Data Retention 200 years (minimum) Write Cycle Time 5 ms (max, self‑timed) Operating Temperature –40°C to +85°C (industrial grade) These specifications, particularly the high endurance rating, make the device suitable for applications that require frequent data updates (such as data logging or storing frequently changing configuration parameters) while also guaranteeing long‑term data integrity over decades of operation. The device also incorporates built‑in ECC (Error Correction Code) which further contributes to its robust reliability.

A: Thanks to its 128‑Kbit capacity, high‑speed 10 MHz SPI interface, wide operating voltage range (2.5 V to 5.5 V), industrial temperature rating (–40°C to +85°C), and small SO8N package, the M95128-WMN6TP is well‑suited for a broad range of applications. Typical use cases include: Industrial automation and control systems – Storing configuration parameters, calibration data, and operational logs in PLCs, HMIs, sensors, and measurement equipment. Consumer electronics – Storing user settings, device preferences, and calibration constants in portable devices, smart appliances, and wearables. Medical devices – Securely storing critical device identification, calibration information, and usage logs in diagnostic equipment and patient monitors. Smart meters and Internet of Things (IoT) devices – Handling data logging, energy measurement data, and configuration updates in electricity, water, and gas meters, as well as IoT sensor nodes. Communication and networking equipment – Storing MAC addresses, board‑specific configuration data, and system parameters in routers, switches, and telecommunication hardware. Automotive electronics – For engine control units (ECUs), body control modules, and infotainment systems where reliable non‑volatile memory is essential (subject to AEC‑Q100 qualification for specific variants). ⚠️ Important Lifecycle Information: The product lifecycle status for the M95128-WMN6TP is Active and in mass production. Multiple distributor sources, including STMicroelectronics' official website, Mouser, DigiKey, Avnet, and Farnell, list the part status as Active. The M95128-WMN6TP is the recommended replacement for the older M95128-WMN6 and M95128-WMN6T variants, with the same form, fit, and function. STMicroelectronics continues to manufacture this device, and it is readily available for both new designs and ongoing production. For new projects, the M95128-WMN6TP remains a suitable, active choice. The “WMN6TP” suffix indicates SO8N package, industrial temperature, Tape & Reel packaging, with standard reel quantities of 2,500 pieces.