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STMicroelectronics M95512-WDW6TP
- Part No.:
- M95512-WDW6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M95512-WDW6TP.pdf
- Description:
- IC EEPROM 512KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,063
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Product details
Overview
M95512-WDW6TP 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 supply at -40 °C to +85 °C ambient. It supports 16 MHz clock speed, features 128-byte page write capability with ≤5 ms write time per byte or page, and includes hardware- and software-based write protection for quarter/half/entire memory array. Used in industrial control modules for firmware parameter storage and calibration data retention.
For engineers reviewing the M95512-WDW6TP datasheet, M95512-WDW6TP pinout, M95512-WDW6TP application, or M95512-WDW6TP equivalent, this device serves as a drop-in SPI-compatible nonvolatile memory solution requiring precise voltage tolerance, high endurance (>4M write cycles), long-term data retention (>200 years), and configurable block protection - critical for embedded systems with infrequent but mission-critical writes.
Technical Context
The M95512-WDW6TP implements a standard SPI interface compliant with CPOL=0/CPHA=0 and CPOL=1/CPHA=1 modes, latching input on rising clock edge and outputting data on falling edge. Its internal architecture includes an HV generator, ECC-enabled sense amplifiers, and a status register with WIP, WEL, BP1/BP0, and SRWD bits for real-time write state monitoring and protection configuration.
It integrates dual-layer write protection: software-controlled via BP1/BP0 bits (configurable quarter/half/full array lock) and hardware-enforced via SRWD bit combined with external W pin assertion. The Identification page (128 bytes) - present only in M95512-DF variants - is not implemented in M95512-WDW6TP, confirming its identity as the standard-voltage M95512-W variant in TSSOP8 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (64 Kbyte), organized as 65536 × 8 bits - supports full firmware parameter tables without external memory expansion. |
| Interface | SPI bus (CPOL/CPHA = 0/0 or 1/1) - interoperable with STM32, PIC, and ARM Cortex-M microcontrollers without protocol translation. |
| Write time | ≤5 ms per byte or per 128-byte page - enables fast field updates during device commissioning or calibration routines. |
| Endurance | >4 million write cycles - sustains daily reconfiguration over 10+ years in industrial logging applications. |
| Data retention | >200 years at 85 °C - guarantees integrity of stored calibration coefficients across product lifetime without refresh. |
| Supply voltage | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains, eliminating level-shifting in mixed-voltage designs. |
| Operating temp | -40 °C to +85 °C - qualified for use in outdoor metering, factory automation, and automotive under-hood ECUs. |
| ESD protection | Enhanced HBM ESD rating - reduces susceptibility to handling damage during PCB assembly and field servicing. |
Pinout & Package
Package: TSSOP8 (169 mil width), ECOPACK2-compliant, surface-mount, 8-pin thin shrink small outline package with exposed pad option not applicable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Chip Select | Active-low enable signal; must transition low-to-high between instructions to terminate command sequences and initiate internal write cycles. |
| 2 (W) | Write Protect | Hardware lock input; when low with SRWD=1, prevents modification of BP1/BP0/SRWD bits in status register - critical for production firmware lockdown. |
| 3 (VSS) | Ground | Reference node for all I/O and power; requires low-inductance connection to PCB ground plane to suppress SPI noise. |
| 4 (C) | Serial Clock | Master-generated timing signal; rising edge latches D input, falling edge outputs Q data - defines maximum 16 MHz interface bandwidth. |
| 5 (Q) | Serial Data Output | Tri-state open-drain output; driven high-impedance when S=high or HOLD=low - allows multi-device SPI bus sharing. |
| 6 (HOLD) | Hold Control | Pauses ongoing SPI transaction without resetting internal state; used to defer EEPROM access during MCU interrupt service routines. |
| 7 (D) | Serial Data Input | Command/address/data input; sampled on rising C edge - accepts WREN, WRITE, RDSR, and other opcodes per Table 4 of DS4192. |
| 8 (VCC) | Supply Voltage | 2.5–5.5 V power rail; requires local 10–100 nF decoupling capacitor to maintain stability during write cycles and prevent POR resets. |
Key Features
| Feature | Design Value |
|---|---|
| Page write optimization | 128-byte pages reduce SPI transaction count by 99% vs. byte-write for bulk updates - cuts firmware update time from seconds to milliseconds. |
| Multi-level write protection | Combines software-configurable BP1/BP0 bits (quarter/half/full array lock) with hardware SRWD+W pin enforcement - prevents accidental or malicious overwrite of critical boot parameters. |
| Power-on reset (POR) circuit | Guarantees WEL=0 and WIP=0 at startup, blocking unintended writes during power ramp - eliminates need for external reset sequencing logic. |
| Hold function | Enables deterministic SPI bus arbitration: MCU can suspend EEPROM access mid-transaction during high-priority ISR execution without losing context or corrupting data. |
| High-reliability process | ST's proprietary EEPROM technology delivers >4M write cycles and >200-year retention at 85 °C - validated per JEDEC JESD22-A117 - enabling unattended operation in remote infrastructure. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
|
Use Scenario: Storing I/O mapping, PID tuning constants, and alarm thresholds in programmable logic controllers deployed in factory environments. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed asynchronously via SPI during boot or runtime reconfiguration; no refresh required. Use Value: Enables field technicians to update control logic without firmware reflashing - reducing downtime and eliminating risk of bricking the controller. |
Use Scenario: Retaining sensor offset/gain coefficients and regulatory compliance logs in portable diagnostic equipment subject to FDA 21 CFR Part 11 audit trails. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory with hardware write lock for calibration data; accessed only during device self-test or service mode. Use Value: Meets medical device traceability requirements by preventing unauthorized modification of calibration records while supporting periodic recalibration. |
| Smart Energy Meter Firmware Parameters | Automotive Body Control Module Settings |
|
Use Scenario: Holding tariff schedules, pulse constants, and communication protocol settings in ANSI C12.19-compliant electricity meters operating in harsh grid environments. IC Role / Device Role / Timing Role: SPI EEPROM interfaced to metrology SoC; withstands wide temperature swings and conducted EMI per IEC 61000-4-4/6. Use Value: Ensures accurate billing data persistence across 20+ year meter lifetime, even after repeated power cycling and brownout events. |
Use Scenario: Storing seat position memory, mirror angle presets, and lighting profiles in automotive BCMs where space and reliability are constrained. IC Role / Device Role / Timing Role: Compact TSSOP8 EEPROM integrated into CAN/LIN gateway module; operates across full automotive temperature range (-40 °C to +105 °C derated). Use Value: Supports OEM personalization features without increasing BOM cost or PCB area - leverages existing SPI resources in low-pin-count MCUs. |
Availability
M95512-WDW6TP is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, smart utility meters, and automotive body electronics requiring stable component supply, long-lifecycle support, and guaranteed second-sourcing paths.
Supply support for M95512-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, Switzerland, designing and manufacturing analog, MEMS, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The M95512-WDW6TP belongs to ST's serial EEPROM product line, engineered specifically for robust, low-power, SPI-based nonvolatile storage in space-constrained embedded systems where data integrity and long-term reliability are non-negotiable.
FAQ
Is M95512-WDW6TP pin-compatible with other M95512 variants?
Yes - all M95512 variants (M95512-W, -R, -DF) share identical pinouts across SO8N, TSSOP8, UFDFPN8, and WLCSP8 packages. M95512-WDW6TP uses TSSOP8 and is electrically compatible with M95512-RDW6TP and M95512-DFW6TP, differing only in supply voltage range and presence of the Identification page.
What is the function of the HOLD pin during active SPI communication?
The HOLD pin suspends ongoing SPI transactions without deselecting the device or resetting internal state. When asserted low during a read or write sequence, Q goes high-impedance and D/C are ignored, allowing the host MCU to service interrupts and resume exactly where it left off - essential for real-time deterministic systems.
How does write protection work with both BP bits and the W pin?
BP1/BP0 bits configure software-defined protection zones (none, upper quarter, upper half, or full array). The W pin, when used with SRWD=1, hardware-locks those BP bits and SRWD itself - preventing any further changes to protection settings. This two-tier scheme ensures production firmware cannot be altered post-deployment.
Can M95512-WDW6TP operate at 1.8 V?
No - M95512-WDW6TP is the "W" variant, specified for 2.5 V to 5.5 V operation. For 1.8 V compatibility, select M95512-RDW6TP (1.8–5.5 V) or M95512-DFW6TP (1.7–5.5 V); these share identical functionality and pinout but differ in minimum VCC threshold and inclusion of the Identification page.
M95512-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:
- 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-TSSOP
M95512-WDW6TP FAQ
1.How can I place an order for M95512-WDW6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M95512-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 M95512-WDW6TP reliable?
The price and inventory of M95512-WDW6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M95512-WDW6TP is usually 5 days.
3.What payment methods are accepted for M95512-WDW6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M95512-WDW6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M95512-WDW6TP?
M95512-WDW6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M95512-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 M95512-WDW6TP?
For technical support, including M95512-WDW6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M95512-WDW6TP requirements.
6.How does Aetrix verify that M95512-WDW6TP is sourced from the original manufacturer or authorized distributors?
All M95512-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 M95512-WDW6TP meets industry standards.
7.What is the process for return or replacement of M95512-WDW6TP?
All M95512-WDW6TP units undergo pre-shipment inspection (PSI). If there is an issue with M95512-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 M95512-WDW6TP part is unused and in its original packaging.
Return procedure for M95512-WDW6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M95512-WDW6TP Tags
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