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STMicroelectronics M95040-DFMN6TP
- Part No.:
- M95040-DFMN6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M95040-DFMN6TP.pdf
- Description:
- IC EEPROM 4KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:24,701
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Product details
Overview
M95040-DFMN6TP from STMicroelectronics is a 4-Kbit (512-byte) serial SPI bus EEPROM with 1.7 V to 5.5 V single-supply operation, 20 MHz max clock frequency, and an additional 16-byte identification page permanently lockable in read-only mode. It delivers byte/page write times ≤5 ms, >4 million write cycles, and >200-year data retention, deployed in industrial control modules for nonvolatile parameter storage under extended temperature (-40 °C to +85 °C).
For engineers reviewing the M95040-DFMN6TP datasheet, M95040-DFMN6TP pinout, M95040-DFMN6TP application, or M95040-DFMN6TP equivalent, key selection criteria include supply voltage range (1.7–5.5 V), identification page lockability, ECC-protected reads, quarter/half/whole-array software write protection, and SO8N/TSSOP8/UFDFPN8 ECOPACK2 package compatibility.
Technical Context
The M95040-DF implements a standard SPI interface with CPOL=0/CPHA=0 or CPOL=1/CPHA=1 mode support, using dedicated D (input), Q (output), C (clock), S (chip select), W (write protect), and HOLD (communication pause) signals. Its internal architecture includes an ECC x1 logic per memory byte, a status register with WIP/WEL/BP1/BP0 bits, and a high-voltage generator for write operations.
It features a 512 × 8-bit memory array organized into 32 pages of 16 bytes each, plus one dedicated 16-byte identification page accessible only via RDID/WRID/LID instructions. The identification page supports permanent read-only locking via LID command, enabling secure storage of calibration data or device-specific keys without risk of overwrite.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Kbit (512 bytes), organized as 32 × 16-byte pages + 1 × 16-byte identification page |
| Supply voltage | 1.7 V to 5.5 V - enables direct interfacing with 1.8 V logic and legacy 3.3/5 V systems |
| Max SPI clock | 20 MHz - supports high-throughput configuration updates in real-time embedded systems |
| Write endurance | >4 million cycles - suitable for frequent firmware parameter logging in field-deployed equipment |
| Data retention | >200 years at +25 °C - ensures long-term reliability in unattended infrastructure applications |
| ECC protection | Single-bit error correction per byte - improves read reliability in electrically noisy industrial environments |
| Operating temp | -40 °C to +85 °C - certified for use in automotive body control modules and outdoor IoT gateways |
Pinout & Package
Package: SO8N (ECOPACK2, 150 mil width), RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S | Chip select | Active-low enable signal; falling edge initiates instruction decoding and must precede all valid SPI transactions |
| C | Serial clock | Timing reference for data sampling (rising edge for input, falling edge for output); supports CPOL/CPHA modes 0,0 and 1,1 |
| D | Serial data input | Carries instruction codes, addresses, and write data; latched on rising edge of C |
| Q | Serial data output | Transfers read data and status register contents; driven on falling edge of C |
| W | Write protect | Hardware-level write disable when low; overrides software BP bits and prevents accidental writes during power transients |
| HOLD | Communication hold | Pauses ongoing SPI transfer without deselecting device; requires S low and C low for clean entry/exit |
| VCC | Supply voltage | 1.7–5.5 V power rail; decoupling capacitor (10–100 nF) required near pins for stable write operation |
| VSS | Ground | Reference for all I/O and internal circuitry; must be low-impedance connection to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Identification page | 16-byte dedicated memory area with LID command for irreversible read-only locking - used for storing immutable calibration constants or cryptographic keys |
| Software write protection | BP1/BP0 bits configure quarter/half/whole-array lock via WRSR instruction - enables flexible partitioning of user-accessible vs. factory-protected zones |
| Embedded ECC | Per-byte single-bit error correction - eliminates need for external CRC checks in safety-critical sensor node configurations |
| Fast write timing | ≤5 ms byte and page write - reduces system latency during dynamic configuration updates in PLC I/O modules |
| Enhanced ESD | Robust protection exceeding 4 kV HBM - improves manufacturing yield and field reliability in handling-intensive industrial assembly lines |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Storing calibrated ADC offset/gain values and channel mapping for analog input cards operating across temperature extremes. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with ECC-protected reads and hardware write lock during runtime. Use Value: Prevents corruption of critical calibration data during EMI events or brownout conditions, ensuring measurement accuracy over 10+ year service life. | Use Scenario: Retaining seat position memory, mirror angle presets, and lighting profiles across vehicle ignition cycles. IC Role / Device Role / Timing Role: Low-voltage (1.8 V) EEPROM for infotainment subsystems requiring fast, reliable parameter recall at startup. Use Value: Enables sub-100 ms user profile restoration after power-on using 1.7 V minimum supply compatibility with automotive battery droop. |
| Smart Energy Meters | Medical Diagnostic Equipment |
Use Scenario: Logging tamper events, firmware version stamps, and tariff schedule changes in revenue-grade electricity meters. IC Role / Device Role / Timing Role: Secure, high-endurance data logger with identification page locked to prevent unauthorized firmware modification. Use Value: Meets IEC 62056-21 requirements for tamper-evident storage with >4M write cycles and 200-year retention for audit trail integrity. | Use Scenario: Storing sensor calibration coefficients, usage counters, and regulatory compliance flags in portable ultrasound devices. IC Role / Device Role / Timing Role: Medical-grade nonvolatile memory with ECC and lockable ID page for FDA 21 CFR Part 11 electronic record integrity. Use Value: Ensures traceable, unalterable device history and calibration provenance required for Class II medical device certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF041A-SSH-T | 4 Mbit density, no identification page, 2.7–3.6 V supply only | Lacks lockable ID page and 1.7 V operation; suited for higher-density boot code storage, not calibration security | Select only if memory capacity >4 Kbit is required and 1.7 V operation is unnecessary |
| M95040-DWDW6TP | Same 4 Kbit array and ID page, but TSSOP8 package (169 mil width) instead of SO8N | Identical functionality and electrical specs; differs only in mechanical footprint and thermal resistance | Choose for space-constrained PCB layouts where TSSOP8's smaller body improves routing density |
Compared with AT25DF041A-SSH-T and M95040-DWDW6TP, the M95040-DFMN6TP uniquely combines ultra-low-voltage operation (1.7 V), lockable identification page, and SO8N package - making it optimal for cost-sensitive, safety-critical industrial nodes requiring guaranteed parameter immutability and wide supply tolerance.
Availability
M95040-DFMN6TP is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, smart energy meters, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for M95040-DFMN6TP 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, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and memory products for industrial, automotive, and consumer markets.
The M950x0 family targets cost-sensitive, high-reliability embedded systems needing robust serial EEPROM with enhanced data integrity features - especially where secure parameter storage, wide voltage operation, and long-term field stability are mandatory.
FAQ
What is the purpose of the identification page in M95040-DFMN6TP?
The identification page is a dedicated 16-byte memory region accessible only via RDID/WRID/LID instructions. Once locked using the LID command, it becomes permanently read-only, preventing overwrite of critical data such as calibration constants, device serial numbers, or cryptographic keys - a feature absent in standard M95040-W/R variants.
How does the HOLD pin function during SPI communication?
The HOLD pin pauses active SPI transfers without deselecting the device or resetting internal state. It requires S low and C low for clean activation/deactivation. During HOLD, Q goes high-impedance and D/C are ignored, allowing the host MCU to service higher-priority interrupts while preserving transaction context - essential for deterministic real-time systems.
Can M95040-DFMN6TP operate reliably at 1.7 V supply?
Yes - the -DF suffix explicitly denotes 1.7 V to 5.5 V operation. At 1.7 V, it maintains full 20 MHz SPI capability, 5 ms write timing, and -40 °C to +85 °C temperature range. This enables direct integration with 1.8 V logic families and battery-powered edge devices experiencing deep brownout conditions.
What write protection mechanisms does M95040-DFMN6TP support?
It supports three layered protections: (1) Hardware W pin - disables all writes when low; (2) Software BP1/BP0 bits - configure quarter/half/whole-array lock via WRSR; (3) Identification page lock - irreversible via LID command. These operate independently, allowing simultaneous use - e.g., W pin guards against power-up glitches while BP bits protect user data zones.
M95040-DFMN6TP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
M95040-DFMN6TP FAQ
1.How can I place an order for M95040-DFMN6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M95040-DFMN6TP 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 M95040-DFMN6TP reliable?
The price and inventory of M95040-DFMN6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M95040-DFMN6TP is usually 5 days.
3.What payment methods are accepted for M95040-DFMN6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M95040-DFMN6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M95040-DFMN6TP?
M95040-DFMN6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M95040-DFMN6TP 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 M95040-DFMN6TP?
For technical support, including M95040-DFMN6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M95040-DFMN6TP requirements.
6.How does Aetrix verify that M95040-DFMN6TP is sourced from the original manufacturer or authorized distributors?
All M95040-DFMN6TP 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 M95040-DFMN6TP meets industry standards.
7.What is the process for return or replacement of M95040-DFMN6TP?
All M95040-DFMN6TP units undergo pre-shipment inspection (PSI). If there is an issue with M95040-DFMN6TP, 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 M95040-DFMN6TP part is unused and in its original packaging.
Return procedure for M95040-DFMN6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M95040-DFMN6TP Tags
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