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STMicroelectronics M93C56-RDW3TP/K
- Part No.:
- M93C56-RDW3TP/K
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
M93C56-RDW3TP/K.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,039
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Product details
Overview
M93C56-RDW3TP/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 for -40 °C to +125 °C environments. It supports byte/word write in ≤4 ms, features READY/BUSY signaling on Q pin, and delivers 4 million write cycles at 25 °C - used for calibration storage, configuration retention, and fault log backup in engine control units.
For engineers reviewing the M93C56-RDW3TP/K datasheet, M93C56-RDW3TP/K pinout, M93C56-RDW3TP/K application, or M93C56-RDW3TP/K equivalent, key selection criteria include MICROWIRE™ protocol compatibility, 8-pin TSSOP package footprint, 2 MHz max clock rate, and guaranteed endurance at automotive temperature extremes.
Technical Context
The M93C56-RDW3TP/K implements a synchronous serial interface using MICROWIRE™ protocol with dedicated S (chip select), C (clock), D (data in), Q (data out), and ORG (organization select) signals. Its internal logic decodes 9-bit addresses for x8 mode or 8-bit addresses for x16 mode, enabling flexible memory mapping without external address latches.
Write operations are self-timed and do not require pre-erase; the device asserts BUSY on Q while programming, allowing host MCU polling. An integrated POR circuit prevents spurious writes during power ramp, and ORG pin state (VSS or VCC) statically configures memory width at power-up - no runtime reconfiguration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2048 bits (256 bytes or 128 words) |
| Interface protocol | MICROWIRE™ serial bus - compatible with legacy MCU SPI peripherals configured for 3-wire mode |
| Max clock frequency | 2 MHz - enables 1.25 µs minimum clock period for timing-critical boot-time reads |
| Write time | ≤4 ms per byte or word - deterministic latency for firmware update rollback storage |
| Endurance | 4 million write cycles at 25 °C - supports >10-year logging in telematics modules with daily parameter saves |
| Data retention | 50 years at 125 °C - ensures calibration data integrity over full vehicle lifetime under hood conditions |
| Supply voltage | 1.8 V to 5.5 V - interoperable with 3.3 V and 5 V microcontrollers without level shifters |
| Operating temp | -40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for powertrain and chassis ECUs |
Pinout & Package
Package: TSSOP8 (DW), 169 mil width, RoHS-compliant and Halogen-free (ECOPACK2®).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S | Chip Select Input | Active-low enable; must be held high during read/write sequences to maintain bus ownership |
| C | Serial Clock Input | Synchronous edge-triggered clock; rising edge samples D and shifts Q; stops safely during write cycle |
| D | Serial Data Input | Accepts instruction op-codes, addresses, and write data; sampled on rising C edge |
| Q | Serial Data Output | Outputs read data MSB-first; asserts BUSY (low) during write/erase when S = high |
| ORG | Organization Select | Static configuration: tied to VSS for x8 (256-byte), VCC for x16 (128-word) addressing |
| VCC | Power Supply | 1.8–5.5 V input; requires local 10–100 nF decoupling capacitor per datasheet Section 3.1.1 |
| VSS | Ground | Reference return path; must be low-impedance to support fast clock edges and noise immunity |
| NC | No Connect | Pin 8 is unused (DU); may be left floating, tied to VCC, or tied to VSS - no functional impact |
Key Features
| Feature | Design Value |
|---|---|
| READY/BUSY signaling | Real-time status feedback on Q pin eliminates need for fixed delay timers in host firmware |
| Dual memory organization | Hardware-selectable x8 or x16 mode via ORG pin - reduces address bus overhead in 16-bit MCU systems |
| Zero-power write protection | Internal POR blocks all write/erase commands until VCC exceeds reset threshold - prevents corruption during brownout |
| Sequential read mode | Continuous data stream output with auto-incremented address - cuts read latency by 30% vs. random-access bursts |
| Enhanced ESD protection | ±4 kV HBM - meets automotive system-level ESD requirements without external TVS diodes |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance System (ADAS) Camera Module |
|---|---|
Use Scenario: Storing fuel injection timing maps and knock sensor calibration offsets across engine life cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding adaptive learning parameters updated during OBD-II diagnostics. Use Value: Maintains precise combustion control after 100k+ ignition cycles with guaranteed 50-year data retention at 125 °C under hood. | Use Scenario: Retaining lens focus offset and white balance coefficients after camera power-down. IC Role / Device Role / Timing Role: Boot-time configuration loader for image signal processor (ISP) initialization sequence. Use Value: Enables sub-100 ms cold-start imaging by delivering calibrated ISP settings before first frame capture. |
| Electric Power Steering (EPS) Controller | Body Control Module (BCM) |
Use Scenario: Logging torque sensor zero-point drift compensation values during vehicle service intervals. IC Role / Device Role / Timing Role: Fault-tolerant parameter archive supporting ASIL-B diagnostic coverage. Use Value: Survives 4M write cycles at 85 °C ambient - sufficient for 15-year service life with biannual recalibration. | Use Scenario: Preserving door lock actuator position limits and window auto-reverse thresholds across battery disconnect events. IC Role / Device Role / Timing Role: Low-power configuration keeper active in sleep mode (<1 µA standby current). Use Value: Operates down to 1.8 V - retains settings during stop-start battery voltage sag below 2.0 V. |
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, 2.7–3.6 V only, no ORG pin - fixed 256-byte x8 organization | Lacks automotive temp range (-40 °C to +85 °C only); no AEC-Q100 qualification | Select only for non-automotive industrial control where voltage range and qualification are not required |
| BR24G02FJ-3GE2 | I²C interface, 1.7–5.5 V, 2 Kbit, but no READY/BUSY pin - relies on timeout polling | Slower effective write throughput due to lack of BUSY signaling; higher firmware complexity | Prefer when board layout favors I²C routing or when existing firmware already uses I²C EEPROM drivers |
Compared with AT25DF021-SSH-T and BR24G02FJ-3GE2, the M93C56-RDW3TP/K uniquely combines MICROWIRE™ compatibility, AEC-Q100 Grade 1 qualification, hardware-configurable x8/x16 organization, and READY/BUSY signaling - making it the only drop-in solution for legacy automotive MCU designs requiring deterministic write status feedback and extended temperature operation.
Availability
M93C56-RDW3TP/K is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, electric power steering controllers, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for M93C56-RDW3TP/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, designing and manufacturing microcontrollers, power ICs, sensors, and memory solutions for automotive, industrial, and consumer markets.
The M93Cx6-A125 product line delivers automotive-qualified serial EEPROMs optimized for calibration data storage, fault logging, and configuration retention in safety-critical electronic control units operating under extreme thermal and electrical stress.
FAQ
What is the function of the ORG pin on M93C56-RDW3TP/K?
The ORG pin statically selects memory organization: tied to VSS enables x8 mode (256 bytes), tied to VCC enables x16 mode (128 words). It must be set at power-up and cannot be changed dynamically. This pin determines address bit count (9 bits for x8, 8 bits for x16) and data width during READ/WRITE operations - no internal register controls this setting.
Does M93C56-RDW3TP/K require an external pull-up resistor on the Q pin?
No external pull-up is required on Q. The pin has an active push-pull driver that outputs data or BUSY status (low during write/erase). When deselected (S = low), Q enters high-impedance state - external pull-up is unnecessary and may cause contention if enabled during active communication.
How does the READY/BUSY signal operate during a write cycle?
When S is high and a WRITE instruction completes, Q transitions low and remains low until programming finishes (≤4 ms). Host MCU can poll Q continuously or use interrupt-on-change. After completion, Q returns high, signaling readiness for next command. This replaces fixed-delay timing and improves system responsiveness.
Can M93C56-RDW3TP/K be used with a standard SPI controller?
Yes - its MICROWIRE™ interface is electrically and logically compatible with 3-wire SPI mode (CPOL=0, CPHA=0, no SS auto-handling). The S pin serves as chip select, C as SCLK, D as MOSI, and Q as MISO. No protocol translation is needed, though firmware must follow MICROWIRE™ instruction framing (start bit + op-code + address + data).
M93C56-RDW3TP/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:
- 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-TSSOP
M93C56-RDW3TP/K FAQ
1.How can I place an order for M93C56-RDW3TP/K through Aetrix?
Please submit a Request for Quotation (RFQ) for M93C56-RDW3TP/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-RDW3TP/K reliable?
The price and inventory of M93C56-RDW3TP/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-RDW3TP/K is usually 5 days.
3.What payment methods are accepted for M93C56-RDW3TP/K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M93C56-RDW3TP/K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M93C56-RDW3TP/K?
M93C56-RDW3TP/K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M93C56-RDW3TP/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-RDW3TP/K?
For technical support, including M93C56-RDW3TP/K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M93C56-RDW3TP/K requirements.
6.How does Aetrix verify that M93C56-RDW3TP/K is sourced from the original manufacturer or authorized distributors?
All M93C56-RDW3TP/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-RDW3TP/K meets industry standards.
7.What is the process for return or replacement of M93C56-RDW3TP/K?
All M93C56-RDW3TP/K units undergo pre-shipment inspection (PSI). If there is an issue with M93C56-RDW3TP/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-RDW3TP/K part is unused and in its original packaging.
Return procedure for M93C56-RDW3TP/K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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