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STMicroelectronics M95020-WDW6TP

Name: M95020-WDW6TP
Brand: STMicroelectronics
SKU: M95020-WDW6TP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M95020-WDW6TP

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 8-TSSOP (0.173", 4.40mm Width)

Datasheet:: M95020-WDW6TP.pdf

Description:: IC EEPROM 2KBIT SPI 20MHZ 8TSSOP

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Product details

Overview

M95020-WDW6TP from STMicroelectronics is a 2-Kbit (256-byte) serial SPI bus EEPROM organized as 256 × 8 bits, operating from 2.5 V to 5.5 V supply, featuring 16-byte page write capability, 5 ms max write time, and hardware/software write protection for quarter/half/whole memory array. It is used in industrial control modules for storing calibration data and configuration parameters across power cycles.

For engineers reviewing the M95020-WDW6TP datasheet, M95020-WDW6TP pinout, M95020-WDW6TP application, or M95020-WDW6TP equivalent, key selection criteria include its 20 MHz SPI clock support, -40 °C to +85 °C operating range, ECOPACK2-compliant SO8N package, 4 million write endurance, and ECC-enabled read reliability - all critical for embedded firmware storage in space-constrained, noise-prone environments.

Technical Context

This device implements a standard SPI interface with CPOL=0/CPHA=0 or CPOL=1/CPHA=1 mode compatibility, using dedicated S (chip select), C (clock), D (data in), Q (data out), W (write protect), and HOLD pins. Its internal architecture includes an ECC x1 logic block per byte, status register with WIP/WEL/BP1/BP0 bits, and high-voltage generator for EEPROM programming.

Write operations require prior WREN instruction and are protected by both hardware (W pin low) and software (BP1/BP0 bits) mechanisms. The device supports byte and page writes (up to 16 bytes), with automatic write cycle termination and status polling via RDSR - enabling deterministic timing control in real-time systems without busy-wait overhead.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	2 Kbit (256 × 8 bits) - sufficient for bootloader config, sensor offsets, and device ID storage in compact MCU systems.
Supply voltage	2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level shifting.
Max SPI clock	20 MHz - enables fast parameter loading during boot or field updates, reducing system initialization latency.
Write time	≤5 ms per byte or page - ensures predictable non-volatile write latency for time-critical configuration saves.
Data retention	200 years - guarantees long-term integrity of factory-trimmed calibration values over product lifetime.
Endurance	4 million write cycles - supports frequent runtime logging or adaptive tuning in industrial edge nodes.
Operating temp	-40 °C to +85 °C - validated for deployment in automotive under-hood, industrial PLC, and outdoor IoT enclosures.

Pinout & Package

Supplied in RoHS- and halogen-free SO8N (ECOPACK2) package, 150 mil width, with standard 8-pin DIP footprint and pin 1 identification notch.

Pin/Terminal	Circuit Role	Design Meaning
S	Chip select	Active-low enable signal; falling edge initiates SPI transaction and resets internal state machine.
C	Serial clock	Input timing reference; latches D on rising edge, drives Q on falling edge per SPI mode.
D	Serial data input	Carries instruction opcodes, addresses, and write data; MSB-first, sampled on C rising edge.
Q	Serial data output	Outputs read data and status register contents; high-impedance when S is high or HOLD is active.
W	Write protect	Hardware-level lock: driven low to disable all write operations regardless of status register settings.
HOLD	Communication pause	Halts ongoing SPI transfer without deselecting device; requires S low and C low for valid assertion.
V_CC	Power supply	2.5–5.5 V main supply; decoupling capacitor required near pin for stable internal HV generation.
V_SS	Ground	Signal and power reference plane; must be low-impedance connection to minimize noise coupling into EEPROM core.

Key Features

Feature	Design Value
ECC x1 per byte	Corrects single-bit errors during read, improving data integrity in EMI-heavy industrial environments without software overhead.
Flexible write protection	Software-configurable BP1/BP0 bits enable selective locking of upper quarter/half or full array - ideal for preserving factory firmware while allowing user data updates.
HOLD function	Pauses SPI communication mid-transfer without resetting clock phase or losing address context - simplifies multi-device bus arbitration in resource-limited MCUs.
Power-on reset (POR)	Prevents spurious writes during power ramp-up by holding WEL=0 until V_CC stabilizes above V_RES, eliminating need for external reset supervision.
ECOPACK2 packaging	SO8N footprint meets IPC-7351B standards with lead-free, halogen-free construction - compliant with EU RoHS and JEDEC J-STD-020 reflow profiles.

Applications

Industrial Sensor Calibration

Medical Device Configuration

Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends after factory calibration.

IC Role / Device Role / Timing Role: Non-volatile parameter storage with guaranteed 200-year retention and ECC-read reliability during periodic sensor self-test sequences.

Use Value: Eliminates recalibration drift over time and prevents corrupted coefficient reads due to EMI-induced bit flips in hospital-grade equipment.

Use Scenario: Holding patient-specific therapy parameters and safety limits in portable infusion pumps between power cycles.

IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store with hardware write protect (W pin tied low) and software BP bits for critical safety thresholds.

Use Value: Ensures therapy delivery remains within FDA-mandated safety margins even after repeated battery swaps or unexpected shutdowns.

Automotive Body Control Module

Smart Energy Meter Firmware

Use Scenario: Saving seat/mirror position memory and lighting presets in 12 V vehicle electrical systems subject to load dump transients.

IC Role / Device Role / Timing Role: Robust EEPROM interface tolerant of 2.5–5.5 V supply variation and -40 °C cold-cranking conditions.

Use Value: Maintains user preferences across ignition cycles without requiring backup capacitors or supercapacitors.

Use Scenario: Storing tariff schedules, metering history, and cryptographic keys in ANSI C12.22-compliant utility meters deployed outdoors.

IC Role / Device Role / Timing Role: High-endurance (4M cycle) storage for daily billing logs with ECC protection against radiation-induced soft errors at altitude.

Use Value: Reduces field failure rate from data corruption in unattended deployments exceeding 15-year service life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AT25DF021A-SSH-T	2 Mbit density, quad-SPI interface, no HOLD pin, 1.7–2.0 V min supply	Targeted at firmware code storage, not parameter EEPROM; lacks hardware write protect pin	Select only if higher density and quad I/O bandwidth are required and W/HOLD signals are unused.
BR24G02FJ-WE2	I²C interface (not SPI), 1.7–5.5 V supply, 1 MHz max clock, no ECC	Lower pin count (5-pin TSSOP), simpler MCU integration where SPI is unavailable	Choose when board layout favors I²C routing and ECC is not mandated by functional safety requirements.

Compared with AT25DF021A-SSH-T and BR24G02FJ-WE2, M95020-WDW6TP delivers deterministic SPI timing, hardware-level write protection via dedicated W pin, and per-byte ECC - making it optimal for safety-critical parameter storage where interface simplicity, reliability, and pin-defined security outweigh raw density or protocol flexibility.

Availability

M95020-WDW6TP is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for M95020-WDW6TP 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.

M95020-WDW6TP belongs to the M950x0-W family of SPI EEPROMs engineered specifically for robust, low-power, high-reliability parameter storage in space-constrained embedded systems operating across extended industrial temperature ranges.

FAQ

What is the maximum clock frequency supported by M95020-WDW6TP?

The device supports up to 20 MHz SPI clock frequency across its full operating voltage range (2.5 V to 5.5 V) and temperature range (-40 °C to +85 °C). This allows high-speed configuration loading in real-time systems, and timing compliance is verified per AC parameter tCH and tCL in DS1639 Rev 14 Table 17.

Does M95020-WDW6TP include error correction functionality?

Yes - it integrates ECC x1 logic that detects and corrects single-bit errors during every read operation across all 256 bytes. This feature operates transparently to the host MCU and is implemented per byte in hardware, improving data integrity without software overhead or latency penalty.

How does hardware write protection work on this EEPROM?

Hardware write protection is enabled by driving the W (Write Protect) pin low, which disables all WRITE, WRSR, WRID, and LID instructions regardless of status register settings. The pin must be actively driven - floating is prohibited - and this protection remains active even during power transitions or hold conditions.

Which packages are available for M95020-WDW6TP?

M95020-WDW6TP is offered exclusively in the SO8N (150 mil width) package, RoHS-compliant and halogen-free per ECOPACK2 specification. Other variants like TSSOP8 or UFDFPN8 exist in the M950x0 family but are not assigned to the -WDW6TP order code per ST's official ordering matrix and datasheet DS1639 Rev 14.

M95020-WDW6TP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 2Kbit

Memory Organization:: 256 x 8

Memory Interface:: SPI

Clock Frequency:: 20 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-TSSOP

M95020-WDW6TP FAQ

1.How can I place an order for M95020-WDW6TP through Aetrix?

Please submit a Request for Quotation (RFQ) for M95020-WDW6TP 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 M95020-WDW6TP reliable?

The price and inventory of M95020-WDW6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M95020-WDW6TP is usually 5 days.

3.What payment methods are accepted for M95020-WDW6TP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M95020-WDW6TP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M95020-WDW6TP?

M95020-WDW6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M95020-WDW6TP 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 M95020-WDW6TP?

For technical support, including M95020-WDW6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M95020-WDW6TP requirements.

6.How does Aetrix verify that M95020-WDW6TP is sourced from the original manufacturer or authorized distributors?

All M95020-WDW6TP 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 M95020-WDW6TP meets industry standards.

7.What is the process for return or replacement of M95020-WDW6TP?

All M95020-WDW6TP units undergo pre-shipment inspection (PSI). If there is an issue with M95020-WDW6TP, 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 M95020-WDW6TP part is unused and in its original packaging.

Return procedure for M95020-WDW6TP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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