My Inquiry
My Account
STMicroelectronics M95128-DFDW6TP
- Part No.:
- M95128-DFDW6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M95128-DFDW6TP.pdf
- Description:
- IC EEPROM 128KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,259
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M95128-DFDW6TP from STMicroelectronics is a 128-Kbit serial SPI bus EEPROM organized as 16,384 × 8 bits, operating from 1.7 V to 5.5 V supply with -40 °C to +85 °C temperature range. It features 64-byte page write capability (≤5 ms), 4 million write cycles, 200-year data retention, and an additional 64-byte Identification page permanently lockable in read-only mode.
For engineers reviewing the M95128-DFDW6TP datasheet, M95128-DFDW6TP pinout, M95128-DFDW6TP application, or M95128-DFDW6TP equivalent, this device serves as a low-voltage, high-reliability nonvolatile memory for firmware storage, calibration data logging, and secure parameter retention in space-constrained industrial and automotive control modules.
Technical Context
The M95128-DFDW6TP implements a standard SPI interface supporting CPOL=0/CPHA=0 and CPOL=1/CPHA=1 modes, with data latched on C's rising edge and output on its falling edge. It integrates an internal high-voltage generator and ECC logic for robust write endurance and data integrity.
Its Status register (SRWD, BP1, BP0, WEL, WIP) enables flexible software/hardware write protection - including quarter/half/full array lock and hardware-protected SRWD+WP mode - while the HOLD pin allows pausing ongoing transfers without chip deselection or state loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 128 Kbit (16 Kbytes), organized as 16,384 × 8 bits - supports full firmware image or multi-parameter tables in compact embedded systems. |
| Supply voltage | 1.7 V to 5.5 V - enables direct interfacing with 1.8 V microcontrollers and legacy 3.3 V/5 V systems without level shifters. |
| Write speed | ≤5 ms per byte or per 64-byte page - ensures fast field updates during boot-time configuration or runtime calibration writes. |
| Data retention | 200 years at 25 °C - guarantees long-term validity of stored calibration coefficients, serial numbers, or security keys across product lifetime. |
| Endurance | 4 million write cycles - supports frequent logging (e.g., energy metering, sensor calibration) over >10 years of daily operation. |
| SPI clock rate | Up to 20 MHz - delivers up to 2.5 MB/s effective throughput for bulk read/write operations in time-critical applications. |
| Write protection | Configurable via BP1/BP0 bits (none/quarter/half/whole array) plus hardware WP pin - prevents accidental overwrite of critical firmware or identity data. |
| Identification page | 64-byte dedicated area with LID instruction for permanent read-only lock - used for storing immutable device IDs, cryptographic keys, or factory-trimmed parameters. |
Pinout & Package
Package: UFDFPN8 (2 mm × 3 mm, 0.5 mm pitch, ECOPACK2®). Exposed pad (EP) connected to VSS for thermal and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (HOLD) | Hold control input | Pauses active SPI transfer without resetting internal state; requires S = low to activate; high-impedance Q during hold. |
| 2 (VSS) | Ground reference | Common return path for all signals and power; must be low-inductance connection to minimize noise coupling into sensitive EEPROM core. |
| 3 (C) | Serial clock input | Timing reference for all SPI transactions; data sampled on rising edge (D), output shifted on falling edge (Q). |
| 4 (D) | Serial data input | Carries instructions, addresses, and write data; MSB-first; latched on rising edge of C. |
| 5 (Q) | Serial data output | Outputs read data, status register contents, or ID page contents; MSB-first; valid on falling edge of C. |
| 6 (S) | Chip select input | Active-low enable; falling edge required after power-up before first command; deselects device and places Q in high-Z. |
| 7 (VCC) | Power supply | 1.7–5.5 V supply; requires local 10–100 nF decoupling capacitor near pins 2 and 7 to suppress switching noise during write cycles. |
| 8 (W) | Hardware write protect | Freezes BP1/BP0/SRWD bits when driven low and SRWD = 1; prevents unauthorized modification of protection settings. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation down to 1.7 V | Enables direct integration with modern ultra-low-power MCUs (e.g., STM32L4/L5) without external regulators or level translators. |
| Identification page with permanent lock | 64-byte dedicated memory block programmable once via LID instruction - ideal for storing immutable device identifiers or cryptographic keys. |
| Flexible write protection hierarchy | Combines software-configurable BP bits (quarter/half/full array) with hardware WP pin for defense-in-depth against firmware corruption. |
| High-speed 20 MHz SPI interface | Reduces firmware update time by >3× vs. legacy 5 MHz EEPROMs - critical for OTA updates in industrial gateways and EV charging controllers. |
| ECOPACK2® green packaging | Halogen-free, RoHS-compliant UFDFPN8 package with exposed thermal pad - meets automotive AEC-Q200 stress requirements and simplifies thermal design. |
| Enhanced ESD protection | ±4 kV HBM rating - improves board-level reliability in manufacturing, handling, and field deployment without added TVS components. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets, module-specific configuration, and firmware version metadata across power cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 200-year retention and 4M-cycle endurance under repeated field calibration. Use Value: Eliminates need for battery-backed SRAM or external flash with wear-leveling firmware, reducing BOM count and qualification effort. |
Use Scenario: Retaining door lock actuator calibration, seat position memory, and lighting profile settings in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Low-voltage (1.7 V) EEPROM ensuring reliable operation during cold-crank (≤6 V) and stop-start transients. Use Value: Maintains user preferences and safety-critical settings without volatile backup power, meeting ISO 16750-2 pulse test requirements. |
| Smart Energy Meters | Medical Infusion Pumps |
|
Use Scenario: Logging energy consumption data, tariff schedules, and tamper-event timestamps with cryptographic signature verification keys. IC Role / Device Role / Timing Role: Secure storage of immutable identification page (LID-locked) for device authentication and regulatory compliance traceability. Use Value: Meets IEC 62056-21 and MID Annex C requirements for nonvolatile, tamper-evident data storage without external security ICs. |
Use Scenario: Storing drug library parameters, dose limits, and operator audit trails in battery-powered portable devices. IC Role / Device Role / Timing Role: High-reliability EEPROM with 200-year retention guaranteeing accurate dosing history across 10+ year device lifetimes. Use Value: Supports FDA 21 CFR Part 11 electronic record requirements through deterministic write timing (≤5 ms) and error-resilient SPI protocol. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25128B-SSHL-T (Microchip) | 1.8–5.5 V supply; no Identification page; max 10 MHz SPI; 1M write cycles. | Lacks permanent-lock ID page and 20 MHz speed; suitable only where calibration data immutability is not required. | Select if cost sensitivity outweighs need for secure ID storage and high-speed field updates. |
| BR24G128FJ-WE2 (ROHM) | 1.7–5.5 V; 1.8 MHz max SPI; 1M write cycles; built-in write protect register but no hardware WP pin. | No HOLD pin support; slower throughput limits OTA update bandwidth; lacks hardware-level SRWD/W pin protection. | Choose only for basic parameter storage in non-safety-critical consumer appliances with relaxed timing and security needs. |
Compared with AT25128B-SSHL-T and BR24G128FJ-WE2, the M95128-DFDW6TP uniquely combines 1.7 V operation, 20 MHz speed, 4M write cycles, and LID-locked ID page - making it the only option qualified for secure, high-throughput, long-lifetime embedded storage in industrial and medical applications.
Availability
M95128-DFDW6TP is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, smart energy meters, and medical infusion pumps requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for M95128-DFDW6TP 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 management ICs, sensors, and memory solutions for industrial, automotive, and consumer markets.
The M95128 series belongs to ST's serial EEPROM product line, engineered specifically for robust, low-voltage, high-endurance nonvolatile storage in harsh environments - emphasizing data integrity, security, and long-term reliability over cost-optimized commodity use cases.
FAQ
What is the function of the HOLD pin on M95128-DFDW6TP?
The HOLD pin pauses ongoing SPI communication without deselecting the device or resetting internal state. When asserted low (with S = low), it places Q in high-impedance and ignores D and C transitions. This allows the host MCU to service higher-priority interrupts mid-transfer and resume seamlessly - critical for real-time systems where SPI latency must be bounded.
How does the Identification page differ from standard memory pages?
The Identification page is a dedicated 64-byte memory region accessible only via RDID/WRID instructions. Unlike standard pages, it can be permanently locked in read-only mode using the LID instruction - preventing any future writes even after power cycles. This makes it suitable for storing cryptographic keys, device serial numbers, or calibration certificates that must remain immutable throughout product life.
Can M95128-DFDW6TP operate reliably during automotive cold-crank conditions?
Yes. With a minimum operating voltage of 1.7 V and guaranteed functionality down to -40 °C, the M95128-DFDW6TP maintains full read/write capability during automotive cold-crank events (where battery voltage may dip to 6 V nominal but transiently stress downstream regulators). Its internal POR circuit and robust DC characteristics ensure no spurious writes or data corruption occur under these conditions.
What happens if the Write Protect (W) pin is left floating?
The W pin must be actively driven high or low; floating violates the absolute maximum ratings and risks undefined behavior. If left unconnected, internal leakage may cause metastable voltage levels, potentially enabling unintended hardware protection mode (if SRWD = 1) or disabling protection entirely. STMicroelectronics specifies mandatory pull-up or pull-down - typically 10 kΩ to VCC or VSS - to ensure deterministic operation.
M95128-DFDW6TP 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:
- 128Kbit
- Memory Organization:
- 16K 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-TSSOP
M95128-DFDW6TP FAQ
1.How can I place an order for M95128-DFDW6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M95128-DFDW6TP 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 M95128-DFDW6TP reliable?
The price and inventory of M95128-DFDW6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M95128-DFDW6TP is usually 5 days.
3.What payment methods are accepted for M95128-DFDW6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M95128-DFDW6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M95128-DFDW6TP?
M95128-DFDW6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M95128-DFDW6TP 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 M95128-DFDW6TP?
For technical support, including M95128-DFDW6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M95128-DFDW6TP requirements.
6.How does Aetrix verify that M95128-DFDW6TP is sourced from the original manufacturer or authorized distributors?
All M95128-DFDW6TP 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 M95128-DFDW6TP meets industry standards.
7.What is the process for return or replacement of M95128-DFDW6TP?
All M95128-DFDW6TP units undergo pre-shipment inspection (PSI). If there is an issue with M95128-DFDW6TP, 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 M95128-DFDW6TP part is unused and in its original packaging.
Return procedure for M95128-DFDW6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M95128-DFDW6TP Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
