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STMicroelectronics M95512-WMN6P
- Part No.:
- M95512-WMN6P
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M95512-WMN6P.pdf
- Description:
- IC EEPROM 512KBIT SPI 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,785
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Product details
Overview
M95512-WMN6P from STMicroelectronics is a 512-Kbit (64-Kbyte) serial SPI EEPROM organized as 65536 × 8 bits, operating from 2.5 V to 5.5 V over –40 °C to +85 °C. It supports 16 MHz SPI clock, features 128-byte page write with ≤5 ms latency, includes hardware write protection (quarter/half/whole array), and offers an identification page for secure parameter storage in industrial control and automotive body electronics.
For engineers reviewing the M95512-WMN6P datasheet, M95512-WMN6P pinout, M95512-WMN6P application, or M95512-WMN6P equivalent, key selection criteria include supply voltage range compatibility (2.5–5.5 V), SPI mode support (CPOL/CPHA = 0/0 or 1/1), write endurance (>4 million cycles), data retention (>200 years), and ECOPACK2-compliant packaging options including SO8N and TSSOP8.
Technical Context
The M95512-WMN6P implements a standard SPI interface with dedicated HOLD and W signals for real-time communication suspension and hardware-based memory protection. Its internal architecture includes a high-voltage generator, ECC-enabled sense amplifiers, and a status register with non-volatile BP1/BP0 and SRWD bits controlling block lock granularity and register write disable behavior.
It operates in two power modes: Active (S low, ICC typical 5 mA at 16 MHz) and Standby (S high, ICC1 typical 1 µA), with built-in POR ensuring reliable reset during power-up. The device accepts only 8-bit-aligned instructions and requires WREN before WRITE/WRSR, enforcing protocol-level data integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (64 Kbyte), organized as 65536 × 8 bits - directly addressable via 16-bit SPI address field |
| SPI clock speed | Up to 16 MHz - enables 2 MB/s max read throughput and reduces firmware wait time in high-throughput logging |
| Write time | ≤5 ms per byte or per 128-byte page - deterministic latency critical for real-time calibration storage |
| Endurance | >4 million write cycles - supports frequent field updates in programmable logic controllers and sensor calibration systems |
| Data retention | >200 years at 25 °C - ensures long-term reliability in infrastructure monitoring and automotive ECU nonvolatile storage |
| Supply voltage | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V microcontroller I/O domains without level shifting |
| Operating temp | –40 °C to +85 °C - qualified for under-hood automotive and industrial ambient environments |
| ESD protection | Enhanced HBM ESD rating - improves robustness in manufacturing handling and field deployment |
Pinout & Package
Package: SO8N (150 mil width), ECOPACK2-compliant 8-pin small outline package with standard pin 1 marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S | Chip select | Active-low enable signal; falling edge required after power-up to initiate first instruction; controls active/standby power mode |
| C | Serial clock | Input timing reference; latches D on rising edge, drives Q on falling edge; supports CPOL/CPHA = 0/0 or 1/1 |
| D | Serial data input | MSB-first input for instructions, addresses, and write data; sampled on rising edge of C |
| Q | Serial data output | MSB-first output for read data and status register; driven on falling edge of C; high-impedance when S high or HOLD active |
| W | Write protect | Hardware lock input; used with SRWD bit to freeze BP1/BP0 configuration and prevent accidental status register modification |
| HOLD | Hold control | Active-low pause signal; suspends ongoing SPI transfer without deselecting device or resetting internal state |
| VCC | Supply voltage | 2.5–5.5 V core and I/O supply; requires local 10–100 nF decoupling capacitor near pins |
| VSS | Ground | Reference for all signals; must be connected to system ground plane with low-inductance path |
Key Features
| Feature | Design Value |
|---|---|
| Identification page | 128-byte dedicated area for storing immutable parameters (e.g., calibration coefficients, MAC addresses), lockable permanently via LID instruction |
| Flexible write protection | Configurable via BP1/BP0 bits and W pin: quarter-array (C000h–FFFFh), half-array (8000h–FFFFh), or full-array lock - prevents firmware corruption during field updates |
| Protocol-level data integrity | Instruction validation requiring 8-bit alignment, mandatory WREN preface for writes, and automatic rejection of invalid opcodes - eliminates spurious writes from noise or bus glitches |
| Power-aware operation | Integrated POR circuit ensures no instruction execution until VCC reaches valid threshold; standby current <1 µA reduces system quiescent power in battery-backed applications |
| ECOPACK2 compliance | Halogen-free, RoHS-compliant packaging across SO8N, TSSOP8, UFDFPN8, and WLCSP8 variants - meets industrial and automotive environmental requirements |
Applications
| Automotive Body Control Module | Industrial PLC Configuration Storage |
|---|---|
|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in vehicle BCMs across product lifecycle. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 3.3 V MCU SPI peripheral with hold capability during CAN message bursts. Use Value: >200-year data retention ensures settings persist over full vehicle service life; 4M-cycle endurance supports dealer reprogramming and OTA updates. |
Use Scenario: Retaining ladder logic parameters, I/O mapping, and calibration offsets in modular PLC backplanes exposed to vibration and thermal cycling. IC Role / Device Role / Timing Role: SPI EEPROM co-located with FPGA or ARM Cortex-M7 controller; uses W pin for hardware lock during firmware boot sequence. Use Value: Quarter-array protection isolates factory-set parameters from user-modifiable zones; 16 MHz clock enables fast configuration reload during hot-swap module insertion. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Patch Storage |
|
Use Scenario: Securely storing flow-rate calibration coefficients and safety-critical limits in Class II medical devices requiring ISO 13485 traceability. IC Role / Device Role / Timing Role: Identification page stores encrypted calibration keys; locked via LID after factory programming to prevent runtime tampering. Use Value: Hardware-enforced read-only lock provides audit-ready evidence of unmodified calibration; >4M write cycles support recalibration during maintenance intervals. |
Use Scenario: Holding firmware patch images and cryptographic signatures in utility-grade meters deployed in remote substations with infrequent maintenance windows. IC Role / Device Role / Timing Role: Dual-page architecture separates main firmware (64 KB array) from patch metadata (128-byte ID page); accessed via dedicated RDID/WRID instructions. Use Value: Independent lock control allows patch verification before activation while preserving original firmware integrity; ECOPACK2 packaging withstands outdoor humidity and temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF512C-SSHN-B | 512 Kbit SPI flash (not EEPROM); lacks identification page; 100K write cycles; no hardware W pin | Requires software-managed wear leveling; unsuitable for frequent parameter updates or secure key storage | Select only if cost-sensitive and write frequency <1K cycles/year; verify MCU driver compatibility with flash-specific commands |
| BR24G512FJ-WE2 | 512 Kbit I²C EEPROM; 1.7–5.5 V; 1 million write cycles; no HOLD pin; no identification page | Limited to single-master I²C buses; no real-time communication pause capability; slower max clock (1 MHz) | Choose only for space-constrained designs where I²C routing simplifies layout; avoid in noise-prone environments due to lack of HOLD resilience |
Compared with AT25DF512C-SSHN-B and BR24G512FJ-WE2, the M95512-WMN6P uniquely combines SPI speed (16 MHz), hardware-assisted security (W + ID page lock), and ultra-high endurance (>4M cycles), making it optimal for mission-critical parameter storage where reliability and update frequency intersect.
Availability
M95512-WMN6P is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical infusion pumps, and smart energy metering requiring stable component supply across multi-year production cycles.
Supply support for M95512-WMN6P 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.
The M95512-W series belongs to ST's serial EEPROM product line, engineered specifically for robust, high-reliability nonvolatile storage in harsh environments where data integrity, long-term retention, and secure parameter management are essential.
FAQ
What is the function of the HOLD pin on M95512-WMN6P?
The HOLD pin pauses ongoing SPI communication without deselecting the device or resetting internal state. When driven low while Chip Select (S) is active, it places Serial Data Output (Q) in high-impedance and ignores Serial Clock (C) and Serial Data Input (D). This enables time-critical MCU tasks-such as servicing CAN interrupts or ADC conversions-to preempt EEPROM access without losing transaction context or requiring reinitialization.
How does the Identification page differ from the main memory array?
The Identification page is a dedicated 128-byte region accessible only via RDID/WRID instructions-not through standard READ/WRITE-and supports permanent read-only locking via the LID instruction. Unlike the main array, its contents survive SRWD+WP hardware lock activation, enabling secure storage of calibration keys, device IDs, or cryptographic seeds that must remain immutable after factory programming.
Can M95512-WMN6P operate reliably at 1.8 V?
No. The M95512-WMN6P variant is rated for 2.5 V to 5.5 V operation only. For 1.8 V compatibility, ST specifies the M95512-R variant (1.8–5.5 V) or M95512-DF (1.7–5.5 V). Using M95512-WMN6P below 2.5 V violates absolute maximum ratings and may cause unpredictable read/write failures, status register corruption, or premature endurance degradation.
What SPI modes does M95512-WMN6P support, and why does it matter?
M95512-WMN6P supports only CPOL=0/CPHA=0 and CPOL=1/CPHA=1 modes-both sampling input on the rising clock edge and outputting on the falling edge. This restricts use with MCUs configured for CPOL=0/CPHA=1 or CPOL=1/CPHA=0. Correct mode selection ensures timing compliance with tSU and tH specifications; mismatch causes command misreads, failed writes, or status register read errors during high-speed operation.
M95512-WMN6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 16 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
M95512-WMN6P FAQ
1.How can I place an order for M95512-WMN6P through Aetrix?
Please submit a Request for Quotation (RFQ) for M95512-WMN6P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for M95512-WMN6P reliable?
The price and inventory of M95512-WMN6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M95512-WMN6P is usually 5 days.
3.What payment methods are accepted for M95512-WMN6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M95512-WMN6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M95512-WMN6P?
M95512-WMN6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M95512-WMN6P order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for M95512-WMN6P?
For technical support, including M95512-WMN6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M95512-WMN6P requirements.
6.How does Aetrix verify that M95512-WMN6P is sourced from the original manufacturer or authorized distributors?
All M95512-WMN6P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M95512-WMN6P meets industry standards.
7.What is the process for return or replacement of M95512-WMN6P?
All M95512-WMN6P units undergo pre-shipment inspection (PSI). If there is an issue with M95512-WMN6P, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The M95512-WMN6P part is unused and in its original packaging.
Return procedure for M95512-WMN6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M95512-WMN6P Tags
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M24C02-WMN6TP
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