STMicroelectronics

M95512-RMN6TP

A: The M95512-RMN6TP is designed for a wide operating voltage range, low power consumption, and high reliability. The table below summarises its core specifications, drawn directly from manufacturer data and multiple distributor sources: Specification Value Memory Capacity 512 Kbit (64 Kbyte) Memory Organization 64K × 8 bits Memory Interface SPI (Serial Peripheral Interface) Clock Frequency (fSCLK) 16 MHz (max) Access Time 80 ns (max) Write Cycle Time (tWC) 5 ms (max, self‑timed) Supply Voltage (VCC) 1.8V to 5.5V Active Read Current 2.5 mA (max) Standby Current 5 µA (max) Write Endurance 4,000,000 (4 million) write cycles (minimum) Data Retention 200 years (minimum) Operating Temperature –40°C to +85°C (industrial grade) Package Type 8‑pin SOIC (SO8N, 150 mil) MSL (Moisture Sensitivity Level) 1 (unlimited) RoHS Status RoHS compliant, ECOPACK®2 (halogen‑free) Additional features include: 128‑byte Page Write Mode – Supports writing up to 128 bytes of data in a single self‑timed write cycle, improving programming efficiency. Self‑timed Write Cycle – No external timing control required; the device automatically completes the write operation within 5 ms. Additional Write‑Lockable Identification Page – A separate 128‑byte page that can be permanently locked for storing unique device identification, serial numbers, or security data. Selectable Write Protection – Hardware and software write protection options allow protection of quarter, half, or the entire memory array via the Status Register (BP1, BP0, TB bits) and the Write Protect (W) pin. Built‑in ECC (Error Correction Code) – Enhances data integrity by detecting and correcting bit errors that may occur during read/write operations. Write Enable Latch (WEL) and Power‑On Reset (POR) – Prevent accidental writes during power‑up and power‑down transitions. Enhanced ESD Protection – Provides robust protection against electrostatic discharge events during handling and operation.

A: The M95512-RMN6TP uses a standard 4‑wire SPI (Serial Peripheral Interface) bus for communication. The 8‑pin SOIC package provides the following signal connections: Pin Number Pin Name Function 1 S (Chip Select) Enables the device when driven low 2 Q (Serial Data Output) Transmits data from the device to the host 3 W (Write Protect) When tied to VSS, write operations to the protected blocks are inhibited 4 VSS Ground 5 D (Serial Data Input) Transmits data from the host to the device 6 C (Serial Clock) Provides the clock signal for data transfer (up to 16 MHz) 7 HOLD Allows the host to pause an ongoing serial communication without resetting the instruction 8 VCC Power supply (1.8V to 5.5V) The 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. Communication begins when the host drives the Chip Select (S) pin low. The first byte sent to the device after S is low is the Opcode, which defines the operation to be performed (READ, WRITE, WREN, WRDI, RDSR, WRSR, etc.). The HOLD pin is particularly useful in multi‑device SPI bus systems: when a higher‑priority task requires the bus, the host can assert HOLD to pause the EEPROM transaction, service the higher‑priority task, and then resume the EEPROM transaction exactly where it was paused without resetting the command sequence.

A: The M95512-RMN6TP is engineered for extremely high reliability. Key specifications include: 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) Built‑in ECC Yes – enhances data integrity by detecting and correcting bit errors Enhanced ESD Protection Yes – exceeds industry standards for ESD immunity MSL (Moisture Sensitivity Level) 1 (Unlimited) – No special handling requirements These outstanding reliability figures, particularly the 4 million write cycles and 200‑year data retention, are significantly higher than industry‑standard EEPROMs (which typically offer 1 million cycles and 40 years retention). This makes the device exceptionally well‑suited for applications that require frequent data updates (e.g., data logging, storing frequently changing configuration parameters) while also guaranteeing ultra‑long‑term data integrity.

A: Thanks to its 512‑Kbit capacity, high‑speed 16 MHz SPI interface, wide operating voltage range (1.8V to 5.5V), industrial temperature rating (–40°C to +85°C), and superior reliability (4 million cycles, 200 years retention), the M95512-RMN6TP is well‑suited for a broad range of applications where reliable non‑volatile data storage is required. Typical use cases include: Industrial automation and control systems – Storing configuration parameters, calibration constants, and operational logs in PLCs, HMIs, sensors, and measurement equipment Automotive electronics – For engine control units (ECUs), body control modules, infotainment systems, and telematics units (subject to AEC‑Q100 qualification for specific variants) Consumer electronics – Storing user settings, device preferences, and calibration constants in smart appliances, wearables, and portable devices Smart meters and 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 Medical devices – Securely storing critical device identification, calibration information, and usage logs in diagnostic equipment and patient monitors ⚠️ Important Lifecycle Information: The product lifecycle status for the M95512-RMN6TP is contradictory across authoritative distributor databases and the manufacturer. Manufacturer and Major Distributors (Active Status): STMicroelectronics’ official eStore lists the related M95512-RDW6TP as Active, and DigiKey explicitly lists the part status as Active with over 24,000 units in stock (verified June 2025). The DigiKey product page states “Part Status: Active – DigiKey Programmable Verified” and “Memory Format: EEPROM” with full technical specifications. Future Electronics also lists the Part Status as Active. The Part Life Cycle Code from manufacturer‑affiliated sources is Active. Conflicting Reports: However, multiple distributor databases list the lifecycle status as Obsolete or End‑of‑Life (EOL) , and the official AVAG distributor page explicitly states “Lifecycle Status: Obsolete”. Some sources also list the part as “No Longer Stocked” or “No Longer Manufactured”. Given the conflicting lifecycle reports (Manufacturer indicates Active / Mass Production, but authoritative distributor states Obsolete), engineers are strongly advised to verify current lifecycle status, availability, and lead times directly with an authorised STMicroelectronics distributor (such as DigiKey, Mouser, Future Electronics, or Arrow) before committing this part to a new high‑volume design. For projects requiring long‑term supply assurance, the pin‑compatible M95512-RDW6TP (TSSOP‑8 package) remains a viable active alternative with the same family of specifications. However, the conflicting lifecycle information suggests that the M95512-RMN6TP should be treated with caution for new designs, and the manufacturer’s recommendation should be sought for the most current production status.