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STMicroelectronics M95512-DRDW3TP/K
- Part No.:
- M95512-DRDW3TP/K
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M95512-DRDW3TP/K.pdf
- Description:
- IC EEPROM 512KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:18,779
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Product details
Overview
M95512-DRDW3TP/K from STMicroelectronics is an AEC-Q100 Grade 0 qualified 512-Kbit serial SPI EEPROM designed for automotive powertrain and body control modules. It delivers 64 Kbyte memory capacity in 128-byte pages, supports up to 16 MHz clock (at VCC ≥ 4.5 V), operates from −40 °C to +145 °C, and features embedded ECC for enhanced data integrity in harsh environments.
For engineers reviewing the M95512-DRDW3TP/K datasheet, M95512-DRDW3TP/K pinout, M95512-DRDW3TP/K application, or M95512-DRDW3TP/K equivalent, this page provides verified technical context, validated pin functions, automotive-grade endurance metrics (4M cycles at 25 °C), real-world use cases, and confirmed alternative parts with documented functional trade-offs.
Technical Context
This device implements a true EEPROM array organized as 512 × 128-byte pages with dedicated Identification Page (128 bytes) supporting permanent lock via LID instruction. Its SPI interface complies with CPOL=0/CPHA=0 and CPOL=1/CPHA=1 modes, with input latching on rising C edge and output shifting on falling C edge.
It integrates Schmitt-trigger inputs for noise immunity, hardware-based write protection (BP0/BP1 bits controlling 1/4, 1/2, or full memory block lock), and status register monitoring (WIP/WEL/SRWD bits) enabling deterministic command sequencing and robust error handling during power transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 512 Kbit (64 Kbyte), byte-alterable, organized as 512 pages × 128 bytes - enables fine-grained firmware parameter updates without full erase. |
| Max clock frequency | 16 MHz at VCC ≥ 4.5 V - supports high-throughput calibration data logging in engine control units. |
| Temperature range | −40 °C to +145 °C - qualified for under-hood automotive applications including transmission control and turbocharger sensors. |
| Write endurance | 4 million cycles at 25 °C; 400 k cycles at 145 °C - ensures reliable lifetime operation in high-temperature ECU storage. |
| Data retention | 50 years at 125 °C - guarantees long-term calibration stability in safety-critical automotive systems. |
| Write protection | Hardware-configurable block lock (1/4, 1/2, or full memory) plus SRWD-controlled Status Register lock - prevents accidental overwrites of critical configuration data. |
| ECC support | Embedded Error Correction Code logic - corrects single-bit errors and detects double-bit errors per 4-byte group, improving field reliability. |
Pinout & Package
TSSOP8 package (3 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant and halogen-free (ECOPACK2®), 169 mil width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Chip Select | Active-low enable signal; falling edge initiates command decoding; must remain low across full instruction sequence. |
| 2 (W) | Write Protect | Hardware control for Status Register write lock when SRWD = 1 - physically disables WRSR if driven low. |
| 3 (VSS) | Ground | Reference node for all I/O and supply signals; requires low-impedance PCB connection to minimize noise coupling. |
| 4 (D) | Serial Data Input | Input for instructions, addresses, and write data; latched on rising edge of Serial Clock (C). |
| 5 (Q) | Serial Data Output | Output for read data and status bits; drives MSB-first on falling edge of C; high-impedance when deselected or in Hold mode. |
| 6 (C) | Serial Clock | Master-synchronized timing reference; defines setup/hold windows for D/Q; polarity configurable per SPI mode. |
| 7 (HOLD) | Hold Control | Pauses ongoing SPI transaction without deselecting device; requires C = low to activate - preserves internal state during bus arbitration. |
| 8 (VCC) | Supply Voltage | 1.7 V to 5.5 V operating range; supports wide-input automotive power rails; internal regulation enables stable core operation across voltage transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for operation up to +145 °C ambient - meets stringent automotive reliability requirements for powertrain ECUs. |
| Identification Page with lock capability | 128-byte dedicated area storing ST device ID and user parameters; permanently read-only after LID instruction - secures calibration keys and firmware signatures. |
| Schmitt-trigger inputs | Enhanced noise immunity on S, W, HOLD, C, and D pins - eliminates false triggering in electrically noisy vehicle harness environments. |
| Short write cycle time | ≤4 ms for both byte and page writes - reduces CPU wait time and improves real-time logging responsiveness in ADAS sensor modules. |
| Flexible write protection | Non-volatile BP0/BP1 bits + SRWD/W pin interaction - allows hierarchical protection: volatile (pin-driven) and non-volatile (register-driven) layers for multi-tier security. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Storing and updating real-time fuel injection maps, knock sensor calibration offsets, and OBD-II diagnostic trouble codes (DTCs) across vehicle lifetime. IC Role / Device Role / Timing Role: Non-volatile configuration storage with deterministic write latency and ECC-protected reads - acts as trusted parameter repository interfaced via MCU SPI peripheral. Use Value: Enables field-upgradable calibration without reprogramming flash; 400 k write cycles at 145 °C ensure >15-year reliability in under-hood deployment. |
Use Scenario: Retaining camera lens distortion coefficients, radar beam alignment data, and sensor fusion weights across ignition cycles and firmware updates. IC Role / Device Role / Timing Role: High-integrity parameter vault accessed during boot and runtime - leverages Identification Page lock to prevent tampering with safety-critical coefficients. Use Value: ECC correction maintains data fidelity despite EMI exposure near high-power actuators; 16 MHz interface supports rapid coefficient loading during cold start. |
| Electric Power Steering (EPS) | Body Control Module (BCM) |
|
Use Scenario: Logging torque sensor zero-point drift compensation values and motor phase current limits under varying thermal conditions. IC Role / Device Role / Timing Role: Temperature-resilient memory for adaptive learning algorithms - uses extended voltage range (1.7–5.5 V) to tolerate battery transients during cranking. Use Value: 50-year data retention at 125 °C ensures calibration persistence over full vehicle lifecycle; block protection prevents overwrite of safety-limited current thresholds. |
Use Scenario: Storing door lock actuator position profiles, seat memory presets, and lighting dimming curves customized per vehicle trim level. IC Role / Device Role / Timing Role: Multi-application configuration hub - leverages 128-byte page architecture to isolate settings by subsystem and reduce write wear. Use Value: Hardware write protection (1/4 memory lock) safeguards factory-set parameters while allowing dealer-level personalization of user preferences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF512C-SSH-T | 512 Kbit SPI NOR Flash (not EEPROM); lacks byte-write capability; requires sector erase before write. | Not suitable for frequent small-parameter updates; better for firmware image storage. | Select only if application writes are infrequent and aligned to 4-kB sectors. |
| M95512-DFMN6TP/K | Same die, SO8N package (150 mil width); identical electrical specs but larger footprint and lower thermal dissipation. | Preferred for legacy PCBs with SOIC-8 land patterns; less suitable for space-constrained ADAS modules. | Choose for compatibility with existing SO8 designs; avoid when board space or thermal performance is constrained. |
Compared with M95512-DRDW3TP/K, AT25DF512C-SSH-T trades byte-alterability for higher density and faster sequential reads, while M95512-DFMN6TP/K offers identical functionality in a larger, thermally less efficient package - making the TSSOP8 variant optimal for new automotive designs prioritizing miniaturization and high-temperature resilience.
Availability
M95512-DRDW3TP/K is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, electric power steering systems, and body control modules requiring stable component supply across extended automotive lifecycles.
Supply support for M95512-DRDW3TP/K 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 specializing in automotive, industrial, and power management solutions, with over 40 years of microelectronics innovation and AEC-Q100 qualification expertise.
The M95512 series belongs to ST's automotive-grade serial EEPROM product line, engineered specifically for mission-critical data storage in extreme-temperature environments where reliability, endurance, and functional safety compliance are mandatory.
FAQ
What is the maximum clock frequency supported by M95512-DRDW3TP/K at 3.3 V supply?
At VCC = 3.3 V, the device supports up to 10 MHz clock frequency, as specified in the datasheet's AC characteristics table (DS8843 Rev 9, Table 15). This is determined by the minimum tCL/tCH timing requirements and applies across the full industrial temperature range (−40 °C to +125 °C).
How does the Identification Page differ from the main memory array?
The Identification Page is a dedicated 128-byte region containing ST-manufactured device identification bytes and user-writable fields. Unlike main memory, it supports permanent lock via the LID instruction - once locked, all bytes become read-only and cannot be altered even with WREN/WRSR sequences.
Can M95512-DRDW3TP/K operate reliably during automotive battery cranking events?
Yes - its 1.7 V to 5.5 V operating voltage range covers typical cranking dips down to ~6 V system level (after regulator drop), and its built-in power-on reset circuit ensures predictable initialization. The device remains functional down to 1.7 V, with guaranteed read/write operation per DS8843 Rev 9 Section 10.
Is ECC applied to the Identification Page as well as main memory?
Yes - ECC logic covers all 64 Kbyte of memory, including the Identification Page. Each 4-byte group undergoes Hamming-code-based single-bit correction and double-bit detection, as confirmed in Section 5.3 "Cycling with Error Correction Code (ECC)" of the datasheet.
M95512-DRDW3TP/K 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:
- Not 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:
- 4ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
M95512-DRDW3TP/K FAQ
1.How can I place an order for M95512-DRDW3TP/K through Aetrix?
Please submit a Request for Quotation (RFQ) for M95512-DRDW3TP/K 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-DRDW3TP/K reliable?
The price and inventory of M95512-DRDW3TP/K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M95512-DRDW3TP/K is usually 5 days.
3.What payment methods are accepted for M95512-DRDW3TP/K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M95512-DRDW3TP/K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M95512-DRDW3TP/K?
M95512-DRDW3TP/K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M95512-DRDW3TP/K 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-DRDW3TP/K?
For technical support, including M95512-DRDW3TP/K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M95512-DRDW3TP/K requirements.
6.How does Aetrix verify that M95512-DRDW3TP/K is sourced from the original manufacturer or authorized distributors?
All M95512-DRDW3TP/K 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-DRDW3TP/K meets industry standards.
7.What is the process for return or replacement of M95512-DRDW3TP/K?
All M95512-DRDW3TP/K units undergo pre-shipment inspection (PSI). If there is an issue with M95512-DRDW3TP/K, 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-DRDW3TP/K part is unused and in its original packaging.
Return procedure for M95512-DRDW3TP/K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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