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STMicroelectronics M93C56-RMN3TP/K
- Part No.:
- M93C56-RMN3TP/K
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M93C56-RMN3TP/K.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:902
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Product details
Overview
M93C56-RMN3TP/K from STMicroelectronics is an automotive-grade 2-Kbit MICROWIRE™ serial EEPROM with dual x8/x16 organization, 1.8–5.5 V single-supply operation, and AEC-Q100 Grade 1 qualification (-40 °C to +125 °C). It supports byte/word write in ≤4 ms, features READY/BUSY signaling on Q pin, and delivers 4 million write cycles at 25 °C for infotainment system configuration storage.
For engineers reviewing the M93C56-RMN3TP/K datasheet, M93C56-RMN3TP/K pinout, M93C56-RMN3TP/K application, or M93C56-RMN3TP/K equivalent, key selection criteria include MICROWIRE™ protocol compatibility, 8-pin SO8 narrow (150 mil) package footprint, -40 °C/+125 °C automotive temperature rating, and dual-organization flexibility via ORG pin configuration.
Technical Context
The M93C56-RMN3TP/K implements a synchronous serial interface compliant with the MICROWIRE™ bus standard, using four dedicated signals: S (Chip Select), C (Serial Clock), D (Serial Data Input), and Q (Serial Data Output). Its internal logic includes a programmable address counter, output shift register, and on-chip write timing control that halts external clock dependency during programming.
Memory organization is dynamically selectable: ORG pin tied to VSS enables 256-byte (x8) addressing; left unconnected or pulled to VCC enables 128-word (x16) addressing. The device integrates Power-on Reset (POR) and internal voltage monitoring to inhibit writes during invalid VCC conditions, ensuring data integrity across automotive power transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (2048 bits), configurable as 256 × 8-bit bytes or 128 × 16-bit words |
| Interface protocol | MICROWIRE™ serial bus - requires no external clock stretching; supports up to 2 MHz clock rate |
| Write time | ≤4 ms per byte or word - enables deterministic firmware update latency in real-time ECUs |
| Supply voltage | 1.8 V to 5.5 V - interoperable with 3.3 V and 5 V microcontrollers without level shifting |
| Temperature range | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and dashboard applications |
| Endurance | 4 million write cycles at 25 °C - supports frequent calibration data logging over 10+ year vehicle life |
| Data retention | 50 years at 125 °C - ensures nonvolatile storage integrity throughout full automotive service life |
Pinout & Package
Package: SO8 narrow (MN), 150 mil body width, RoHS-compliant and Halogen-free (ECOPACK2®).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (S) | Chip Select Input | Active-low enable signal - must be held low during instruction execution; high-impedance when deselected |
| 2 (C) | Serial Clock Input | Synchronous edge-triggered clock - rising edge samples D and shifts Q; stops during internal write |
| 3 (D) | Serial Data Input | Instruction op-code, address, and write data input - sampled on rising C edge; high-impedance when not selected |
| 4 (VSS) | Ground | Reference return path for all digital and analog circuitry; requires local 10–100 nF decoupling |
| 5 (Q) | Serial Data Output | Read data or READY/BUSY status - outputs '0' during programming, '1' when ready; open-drain capable |
| 6 (VCC) | Supply Voltage | Single 1.8–5.5 V power rail - internal POR prevents spurious writes during brown-out conditions |
| 7 (ORG) | Organization Select | Configures memory map: tied to VSS = x8 mode (256 bytes), unconnected/VCC = x16 mode (128 words) |
| 8 (NC) | No Connect | Do-not-use pin reserved for factory test - may be left floating, tied to VCC, or grounded without functional impact |
Key Features
| Feature | Design Value |
|---|---|
| READY/BUSY signaling | Real-time status feedback on Q pin eliminates polling delay and simplifies MCU firmware timing |
| Dual memory organization | Hardware-selectable x8/x16 addressing via ORG pin - reduces software abstraction layer complexity in mixed-data systems |
| Enhanced ESD protection | ≥4 kV HBM - meets automotive board-level ESD robustness requirements without external protection diodes |
| Sequential read mode | Continuous stream output with auto-incremented address - enables fast bulk parameter loading (e.g., audio presets) |
| Power-on data protection | Internal POR circuit blocks all instructions until VCC stabilizes above threshold - prevents corruption during cold crank |
Applications
| Instrument Cluster Configuration | Body Control Module (BCM) Settings |
|---|---|
|
Use Scenario: Storing odometer values, trip counters, and driver preference settings across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration storage with guaranteed 50-year data retention at 125 °C ambient. Use Value: Eliminates need for backup battery or capacitor; withstands repeated thermal cycling in dashboard environment. |
Use Scenario: Retaining door lock states, window position memory, and lighting profiles after vehicle shutdown. IC Role / Device Role / Timing Role: Serial EEPROM interfacing directly with 8-bit/16-bit automotive MCUs via MICROWIRE™. Use Value: 4 million write cycles support daily reconfiguration over 15+ years of ownership without wear-out. |
| Engine Control Unit (ECU) Calibration | Infotainment System Audio Presets |
|
Use Scenario: Holding adaptive fuel trim tables and sensor offset corrections updated during OBD-II diagnostics. IC Role / Device Role / Timing Role: Write-enabled only after WEN command; BUSY signal synchronizes MCU wait states. Use Value: ≤4 ms write time enables real-time calibration updates during active engine tuning sessions. |
Use Scenario: Saving user-defined equalizer settings, station presets, and Bluetooth pairing IDs. IC Role / Device Role / Timing Role: Dual x8/x16 organization allows compact storage of mixed 8-bit and 16-bit parameter sets. Use Value: 1.8 V minimum supply supports direct interface with low-power audio SoCs in start-stop vehicles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF021-SSH-T | SPI interface (not MICROWIRE™); 2.7–3.6 V only; no ORG pin for dual organization | Requires SPI-capable MCU; incompatible with legacy MICROWIRE™-only controllers | Select only if migrating to SPI architecture and accepting narrower voltage range |
| M95M02-RMN6TP | 2-Mbit SPI EEPROM; 1.8–5.5 V; SO8 package but different pinout (no ORG, uses HOLD/WE) | Larger capacity but lacks MICROWIRE™ protocol and hardware organization select | Use for higher-density storage where protocol change and firmware rewrite are acceptable |
Compared with AT25DF021-SSH-T and M95M02-RMN6TP, the M93C56-RMN3TP/K uniquely preserves MICROWIRE™ compatibility, dual-organization flexibility, and AEC-Q100 Grade 1 qualification in the same SO8 footprint-critical for drop-in replacement in existing automotive designs.
Availability
M93C56-RMN3TP/K is available at Aetrix Electronics and suitable for instrument cluster configuration, body control module settings, and engine control unit calibration requiring stable component supply across automotive production lifecycles.
Supply support for M93C56-RMN3TP/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 headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing capability.
The M93Cx6-A125 product line delivers AEC-Q100 qualified serial EEPROMs optimized for automotive subsystems requiring extended temperature operation, high endurance, and protocol compatibility with legacy MICROWIRE™-based microcontrollers.
FAQ
What is the function of the ORG pin on M93C56-RMN3TP/K?
The ORG pin selects memory organization: tied to VSS configures the 2-Kbit array as 256 × 8-bit bytes; left unconnected or pulled to VCC configures it as 128 × 16-bit words. This hardware-selectable mode eliminates software overhead for address mapping and supports mixed-data applications without firmware changes.
Does M93C56-RMN3TP/K require an external pull-up resistor on the Q pin?
Yes - the Q pin operates in open-drain mode during READY/BUSY signaling and data output. A 4.7 kΩ to 10 kΩ pull-up resistor to VCC is required to ensure valid logic-high levels and meet AC timing specifications for read operations and BUSY detection.
How does the READY/BUSY signal behave during a write cycle?
When Chip Select (S) is high during programming, the Q pin outputs a steady '0' (BUSY) until internal write completion, then transitions to '1' (READY). This synchronous status signal allows the host MCU to avoid fixed delays and instead poll Q efficiently or use interrupt-driven handling.
Can M93C56-RMN3TP/K be used in 1.8 V systems without level shifters?
Yes - its 1.8 V to 5.5 V operating range permits direct connection to 1.8 V I/O domains. All DC and AC parameters, including setup/hold times and logic thresholds, are fully specified down to 1.8 V, enabling interoperability with ultra-low-power automotive microcontrollers.
M93C56-RMN3TP/K 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
M93C56-RMN3TP/K FAQ
1.How can I place an order for M93C56-RMN3TP/K through Aetrix?
Please submit a Request for Quotation (RFQ) for M93C56-RMN3TP/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 M93C56-RMN3TP/K reliable?
The price and inventory of M93C56-RMN3TP/K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M93C56-RMN3TP/K is usually 5 days.
3.What payment methods are accepted for M93C56-RMN3TP/K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M93C56-RMN3TP/K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M93C56-RMN3TP/K?
M93C56-RMN3TP/K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M93C56-RMN3TP/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 M93C56-RMN3TP/K?
For technical support, including M93C56-RMN3TP/K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M93C56-RMN3TP/K requirements.
6.How does Aetrix verify that M93C56-RMN3TP/K is sourced from the original manufacturer or authorized distributors?
All M93C56-RMN3TP/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 M93C56-RMN3TP/K meets industry standards.
7.What is the process for return or replacement of M93C56-RMN3TP/K?
All M93C56-RMN3TP/K units undergo pre-shipment inspection (PSI). If there is an issue with M93C56-RMN3TP/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 M93C56-RMN3TP/K part is unused and in its original packaging.
Return procedure for M93C56-RMN3TP/K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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