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STMicroelectronics M93C86-WMN6P
- Part No.:
- M93C86-WMN6P
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M93C86-WMN6P.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,044
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Product details
Overview
M93C86-WMN6P from STMicroelectronics is a 16-Kbit MICROWIRE™-interface serial EEPROM with dual x8/x16 organization, operating from 2.5 V to 5.5 V over -40 °C to +85 °C, supporting up to 2 MHz clock frequency and delivering byte/page write within 5 ms - used for configuration storage in industrial controllers and embedded boot loaders.
For engineers reviewing the M93C86-WMN6P datasheet, M93C86-WMN6P pinout, M93C86-WMN6P application, or M93C86-WMN6P equivalent, this page provides verified technical context, validated pin functions, confirmed memory architecture details, and real-world selection guidance for serial EEPROM integration in space-constrained, low-power systems.
Technical Context
The M93C86-WMN6P implements a static CMOS MICROWIRE™ interface with hardware-based READY/BUSY status signaling via Q pin, enabling synchronous read/write/erase operations without external timing control. Its ORG pin selects between 2048-byte (x8) or 1024-word (x16) memory mapping, with internal address auto-increment during sequential reads.
It features on-chip clock pulse counter protection against noise-induced bit misalignment, integrated power-on reset (POR) to prevent spurious writes at power-up, and automatic erase-before-write behavior - eliminating need for explicit ERASE before WRITE instructions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 bytes or 1024 words), directly usable as non-volatile configuration store for firmware parameters |
| Interface protocol | MICROWIRE™ 4-wire serial (S, C, D, Q), compatible with legacy MCU peripherals without SPI mode requirements |
| Supply voltage | 2.5 V to 5.5 V - supports direct connection to 3.3 V or 5 V logic rails without level shifting |
| Write endurance | 4 million cycles at 25°C - sufficient for daily calibration updates over 10+ years in field-deployed equipment |
| Data retention | 200 years at 55°C - ensures long-term reliability in unattended infrastructure monitoring nodes |
| Operating temperature | -40 °C to +85 °C - qualified for industrial automation and automotive body-control modules |
| Max clock frequency | 2 MHz - enables sub-10 µs instruction latency for fast parameter access in real-time control loops |
| Write time | ≤5 ms per byte or page - allows burst programming of full configuration sets within tight boot-time budgets |
Pinout & Package
Package: SO8N (150 mil width), 8-pin small-outline integrated circuit compliant with ECOPACK2 environmental standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply | Primary 2.5–5.5 V supply input; requires local 10–100 nF decoupling capacitor |
| VSS | Ground reference | Return path for all internal circuits; must be low-impedance and tied to system GND |
| S | Chip select | Active-high enable signal; must be pulled low during power-up to prevent inadvertent writes |
| C | Serial clock | Input clock synchronized to data transfers; rising edge samples D and shifts Q |
| D | Serial data input | Instruction/address/data input line; sampled on rising edge of C |
| Q | Serial data output / READY-BUSY | Output for read data; also returns 0 = BUSY or 1 = READY during write/erase cycles |
| ORG | Organization select | Input determining x8 (connected to VSS) or x16 (open or VCC) memory mapping; affects address width |
| DU | Do-not-use test pin | No functional role; may be left floating, tied to VCC, or connected to VSS per board layout convenience |
Key Features
| Feature | Design Value |
|---|---|
| Dual memory organization | Selectable x8 (2048-byte) or x16 (1024-word) addressing via ORG pin - simplifies software adaptation across 8-bit and 16-bit host architectures |
| READY/BUSY signaling | Hardware-driven Q pin indicates active write/erase state - eliminates need for fixed delay timers or polling overhead in firmware |
| Noise-immune instruction validation | On-chip clock pulse counter aborts corrupted WRITE/ERASE commands - prevents partial writes due to EMI or signal integrity issues |
| Automatic erase-before-write | Internal erase cycle triggered automatically before each WRITE - removes requirement for separate ERASE command in application code |
| Enhanced ESD protection | 4000 V HBM rating - improves robustness in handling-sensitive manufacturing and field-repair environments |
| Power-on reset (POR) | Prevents spurious writes during VCC ramp-up - ensures device remains in standby until stable supply is confirmed |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and user-defined operational modes in programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile configuration register accessed during boot and runtime reconfiguration via MICROWIRE™-capable microcontroller. Use Value: Enables field-upgradable settings without firmware reflashing; 200-year retention guarantees data integrity across equipment lifetime. |
Use Scenario: Holding door lock logic states, mirror position presets, and lighting profiles in vehicle BCMs. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to 8-bit automotive MCU for persistent parameter storage with guaranteed -40°C to +85°C operation. Use Value: Supports ASIL-B adjacent functionality through robust write endurance (4M cycles) and ESD-hardened I/O pins. |
| Medical Device Calibration Data | Smart Energy Meter Firmware Parameters |
|
Use Scenario: Retaining factory-calibrated ADC gain/offset coefficients and safety-critical threshold values in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory element accessed only during initialization or service mode via dedicated MCU interface. Use Value: Delivers traceable calibration history with 200-year retention and write-protection via WEN/WDS instruction sequence. |
Use Scenario: Storing tariff schedules, metering constants, and communication credentials in ANSI C12.22-compliant utility meters. IC Role / Device Role / Timing Role: Low-power serial EEPROM supporting frequent parameter updates while maintaining compliance with IEC 62056-21 data logging requirements. Use Value: 2.5 V minimum supply enables direct use with energy-harvesting power supplies; 5 ms write time minimizes battery drain during update events. |
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) | SPI interface (not MICROWIRE™), 128 Kbit capacity, 1.8–5.5 V supply | Requires SPI-capable host; larger memory but incompatible protocol stack | Choose only if migrating to SPI ecosystem and needing >16 Kbit capacity |
| M95128-DFMN6TP/K (STMicroelectronics) | Same MICROWIRE™ interface, 128 Kbit, SO8N package, but uses different instruction set and lacks ORG pin flexibility | Fixed x8 organization; no hardware-selectable word/byte mode | Select when higher density is needed and software can accommodate fixed addressing model |
Compared with AT25128B-SSHL-T and M95128-DFMN6TP/K, the M93C86-WMN6P uniquely supports hardware-configurable x8/x16 organization and MICROWIRE™-native READY/BUSY signaling - critical for deterministic timing in resource-constrained industrial microcontrollers.
Availability
M93C86-WMN6P is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical calibration systems, and smart energy meters requiring stable component supply across extended product lifecycles.
Supply support for M93C86-WMN6P 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 solutions for industrial, automotive, and consumer markets.
The M93C86-WMN6P belongs to ST's legacy MICROWIRE™ EEPROM product line, engineered specifically for reliable, low-pin-count non-volatile storage in cost-sensitive, space-constrained embedded systems where protocol simplicity and long-term data integrity are prioritized.
FAQ
What is the function of the ORG pin on M93C86-WMN6P?
The ORG pin selects memory organization: when tied to VSS, it configures the 16-Kbit array as 2048 bytes (x8); when open or tied to VCC, it configures as 1024 words (x16). This determines address width (11 bits vs. 10 bits) and data bus width (8-bit vs. 16-bit), directly impacting host MCU driver implementation and memory mapping.
Does M93C86-WMN6P require external pull-up resistors on its S, C, or Q lines?
Yes - a pull-down resistor (typically 100 kΩ) is required on the S (chip select) line to ensure deselection during MCU reset or high-impedance states. The C (clock) line should also use a pull-down resistor in multi-device buses to prevent simultaneous S and C high states, which violates tSLCH timing. Q is actively driven and does not require pull-up.
How is write protection implemented on M93C86-WMN6P?
Write protection is controlled by WEN (Write Enable) and WDS (Write Disable) instructions. Power-on default is write-disabled. A WEN instruction must precede any WRITE, ERASE, WRAL, or ERAL command. After successful execution, WDS must be issued to re-disable writes - this two-step process prevents accidental overwrites during noise events or software faults.
Can M93C86-WMN6P operate at 1.8 V?
No - the M93C86-WMN6P is the 'W' variant rated for 2.5 V to 5.5 V operation. For 1.8 V compatibility, the 'R' variant (e.g., M93C86-RMN6P) must be used. Using the 'W' part below 2.5 V risks unreliable read/write behavior, failed READY/BUSY signaling, and potential data corruption due to insufficient internal voltage margins.
M93C86-WMN6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8, 1K x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 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-SOIC
M93C86-WMN6P FAQ
1.How can I place an order for M93C86-WMN6P through Aetrix?
Please submit a Request for Quotation (RFQ) for M93C86-WMN6P 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 M93C86-WMN6P reliable?
The price and inventory of M93C86-WMN6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M93C86-WMN6P is usually 5 days.
3.What payment methods are accepted for M93C86-WMN6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M93C86-WMN6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M93C86-WMN6P?
M93C86-WMN6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M93C86-WMN6P 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 M93C86-WMN6P?
For technical support, including M93C86-WMN6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M93C86-WMN6P requirements.
6.How does Aetrix verify that M93C86-WMN6P is sourced from the original manufacturer or authorized distributors?
All M93C86-WMN6P 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 M93C86-WMN6P meets industry standards.
7.What is the process for return or replacement of M93C86-WMN6P?
All M93C86-WMN6P units undergo pre-shipment inspection (PSI). If there is an issue with M93C86-WMN6P, 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 M93C86-WMN6P part is unused and in its original packaging.
Return procedure for M93C86-WMN6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M93C86-WMN6P Tags
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