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STMicroelectronics M93C56-WMN6TP
- Part No.:
- M93C56-WMN6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M93C56-WMN6TP.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,685
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Product details
Overview
M93C56-WMN6TP from STMicroelectronics is a 2-Kbit serial EEPROM with MICROWIRE™ interface, configurable as 256 × 8-bit or 128 × 16-bit memory, operating from 2.5 V to 5.5 V supply at up to 2 MHz clock frequency, and rated for -40 °C to +85 °C industrial temperature range. It supports byte/word/page write, sequential read, READY/BUSY signaling, and is commonly used in microcontroller-based system configuration storage.
For engineers reviewing the M93C56-WMN6TP datasheet, M93C56-WMN6TP pinout, M93C56-WMN6TP application, or M93C56-WMN6TP equivalent, key selection considerations include its dual x8/x16 organization select (ORG pin), 5 ms max write cycle time, 4 million write endurance, 200-year data retention, and SO8N (150-mil) package compatibility with legacy MICROWIRE™ bus designs.
Technical Context
The M93C56-WMN6TP implements a static CMOS MICROWIRE™-compliant serial interface with synchronous clocked data transfer, supporting seven instruction types (READ, WRITE, WEN, WDS, ERASE, ERAL, WRAL) decoded via start bit + op-code + address + optional data. Its ORG pin selects between 8-bit and 16-bit memory access modes, directly affecting address width (9-bit for x8, 8-bit for x16).
Internal logic includes a clock pulse counter that validates instruction length against expected cycles (e.g., 20 cycles for WRITE in x8 mode), aborting misaligned commands to prevent corruption. A built-in power-on reset (POR) circuit ensures write-disable state at power-up, and READY/BUSY status is signaled on Q pin during self-timed erase/write operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2048 bits (256 bytes or 128 words) |
| Interface protocol | MICROWIRE™ serial bus: 4-wire (S, C, D, Q) + ORG control |
| Supply voltage | 2.5 V to 5.5 V - enables direct interfacing with 3.3 V and 5 V MCU I/O without level shifters |
| Max clock frequency | 2 MHz - supports high-speed configuration reads in boot-time-critical systems |
| Write cycle time | ≤5 ms - allows rapid parameter updates in real-time calibration or field firmware tuning |
| Data retention | 200 years at 55 °C - guarantees long-term reliability in unattended industrial equipment |
| Endurance | 4 million write cycles at 25 °C - supports frequent logging or counter applications over product lifetime |
Pinout & Package
Package: SO8N (150-mil width, ECOPACK2-compliant). Pin 1 identified by notch or dot; DU (pin 7) is unused and may be left floating, tied to VCC, or grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S | Chip Select | Active-high enable: must be held high during instruction execution; falling edge initiates internal timing for WRITE/ERASE |
| C | Serial Clock | Synchronous input: rising edge samples D and shifts Q; clock can be halted during self-timed write |
| D | Serial Data Input | Carries start bit, op-code, address, and data; sampled on rising C edge |
| Q | Serial Data Output / READY-BUSY | Outputs data during READ; outputs low (BUSY) or high (READY) during programming when S = high |
| ORG | Organization Select | High = x16 mode (128 words); low = x8 mode (256 bytes); sets address width and data bus width |
| VCC | Power supply | 2.5–5.5 V; requires local 10–100 nF decoupling capacitor for stable operation |
| VSS | Ground | Reference for all digital and analog functions; must be low-impedance return path |
| DU | Do Not Use | No functional role; reserved for factory test; may be left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Dual memory organization | Selectable x8 or x16 mode via ORG pin - eliminates need for external data-width translation logic |
| Self-timed write/erase | Internal timing eliminates MCU wait-state management; BUSY/READY status reported on Q pin |
| Clock pulse validation | On-chip counter verifies instruction length - prevents corruption from noise-induced clock glitches |
| Enhanced ESD protection | 4000 V HBM - improves robustness in handling-sensitive industrial assembly and field service |
| Power-on reset (POR) | Guarantees WEN disabled at startup - prevents accidental writes during power ramp-up |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) Trim Settings |
|---|---|
|
Use Scenario: Storing calibrated sensor offsets, I/O mapping, and user-defined operational modes in programmable logic controllers. IC Role / Device Role / Timing Role: Non-volatile configuration register accessed during boot and runtime via MICROWIRE™-compatible MCU GPIOs. Use Value: Dual x8/x16 organization allows flexible allocation of small parameter sets (e.g., 16-bit ADC gain) or compact byte arrays (e.g., 8-bit I/O states) without memory waste. |
Use Scenario: Retaining seat/mirror position presets, lighting profiles, and door lock behavior across ignition cycles in BCMs. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to 8-bit automotive MCU with limited SPI peripherals but full MICROWIRE™ support. Use Value: 200-year data retention and -40 °C to +85 °C rating ensure settings persist over vehicle lifetime without battery backup. |
| Medical Infusion Pump Calibration Data | Smart Energy Meter Tariff Tables |
|
Use Scenario: Holding flow-rate calibration coefficients, motor step counts, and safety thresholds updated during service calibration. IC Role / Device Role / Timing Role: Secure, tamper-resistant non-volatile memory accessed only during maintenance mode via dedicated MCU serial port. Use Value: 4 million write cycles support repeated recalibration over device service life; READY/BUSY signaling prevents race conditions during critical updates. |
Use Scenario: Storing time-of-use tariff schedules, billing multipliers, and firmware update flags in utility-grade electricity meters. IC Role / Device Role / Timing Role: Low-power, high-reliability serial memory sharing bus with metrology IC and RTC in meter SoC architecture. Use Value: SO8N package enables compact PCB layout; 2.5–5.5 V supply matches meter's wide-input DC-DC output, eliminating extra regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25020B-SSHL-T (Microchip) | SPI interface (not MICROWIRE™), 2 Kbit, 1.8–5.5 V, no ORG pin - fixed 8-bit organization | Requires MCU SPI peripheral instead of bit-banged MICROWIRE™; lacks dual-word/byte flexibility | Choose if existing design uses SPI and does not require x16 mode or ORG-controlled reconfiguration |
| BR24G02FJ-3GE2 (ROHM) | I²C interface, 2 Kbit, 1.7–5.5 V, supports 400 kHz fast-mode, no READY/BUSY pin - relies on timeout polling | Needs I²C master; no hardware BUSY indication increases software complexity for write synchronization | Prefer for space-constrained designs where I²C bus is already present and deterministic timing is less critical |
Compared with AT25020B-SSHL-T and BR24G02FJ-3GE2, the M93C56-WMN6TP uniquely delivers MICROWIRE™ compatibility, hardware READY/BUSY signaling, and selectable x8/x16 organization - making it optimal for legacy MCU platforms with tight timing constraints and mixed-width data requirements.
Availability
M93C56-WMN6TP is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply, long-lifecycle support, and drop-in replacement capability for legacy ST M93Cxx designs.
Supply support for M93C56-WMN6TP 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, specializing in microcontrollers, power management, sensors, and non-volatile memory solutions for industrial, automotive, and consumer markets.
The M93Cxx series was designed specifically for cost-sensitive, low-pin-count embedded systems needing reliable, easy-to-integrate serial EEPROM with robust noise immunity and flexible memory addressing - targeting applications where SPI/I²C resources are constrained or legacy MICROWIRE™ infrastructure exists.
FAQ
What is the function of the ORG pin on M93C56-WMN6TP?
The ORG pin selects memory organization: pulled high (or left open) configures the device as 128 × 16-bit (x16), while pulled low configures it as 256 × 8-bit (x8). This changes both the address width (8 vs. 9 bits) and data bus width, enabling optimal use of memory space for different data structures without external logic.
How does the READY/BUSY signal work during a write operation?
When S is high during an active WRITE, ERASE, WRAL, or ERAL instruction, the Q pin outputs low (BUSY) until completion, then transitions high (READY). This occurs after tW (max 5 ms), allowing the host MCU to poll Q instead of using fixed delays - improving system responsiveness and reducing unnecessary CPU wait cycles.
Can M93C56-WMN6TP be used with a 1.8 V supply?
No. The M93C56-WMN6TP is the '-W' variant, specified for 2.5 V to 5.5 V operation. For 1.8 V compatibility, the '-R' variant (e.g., M93C56-RMN6TP) is required - it shares identical pinout and functionality but extends VCC minimum to 1.8 V while maintaining the same 2 MHz max clock and -40 °C to +85 °C range.
Is the DU pin (pin 7) required to be connected?
No. Pin 7 (DU) is designated "Do Not Use" - it serves no functional purpose in normal operation and is reserved for STMicroelectronics factory testing. It may be left unconnected, tied to VCC, or tied to VSS without affecting device behavior or reliability.
M93C56-WMN6TP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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, 128 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
M93C56-WMN6TP FAQ
1.How can I place an order for M93C56-WMN6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M93C56-WMN6TP 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 M93C56-WMN6TP reliable?
The price and inventory of M93C56-WMN6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M93C56-WMN6TP is usually 5 days.
3.What payment methods are accepted for M93C56-WMN6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M93C56-WMN6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M93C56-WMN6TP?
M93C56-WMN6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M93C56-WMN6TP 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 M93C56-WMN6TP?
For technical support, including M93C56-WMN6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M93C56-WMN6TP requirements.
6.How does Aetrix verify that M93C56-WMN6TP is sourced from the original manufacturer or authorized distributors?
All M93C56-WMN6TP 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 M93C56-WMN6TP meets industry standards.
7.What is the process for return or replacement of M93C56-WMN6TP?
All M93C56-WMN6TP units undergo pre-shipment inspection (PSI). If there is an issue with M93C56-WMN6TP, 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 M93C56-WMN6TP part is unused and in its original packaging.
Return procedure for M93C56-WMN6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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