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STMicroelectronics M24256-DRMN6TP
- Part No.:
- M24256-DRMN6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M24256-DRMN6TP.pdf
- Description:
- IC EEPROM 256KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,886
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Product details
Overview
M24256-DRMN6TP from STMicroelectronics is a 256-Kbit I²C-compatible EEPROM organized as 32 K × 8 bits, featuring an additional 64-byte identification page with permanent lock capability. It operates from 1.8 V to 5.5 V, supports 1 MHz I²C clock, and delivers byte/page write within 5 ms across –40 °C to +85 °C. Used in industrial control modules for secure parameter storage and firmware revision tracking.
For engineers reviewing the M24256-DRMN6TP datasheet, M24256-DRMN6TP pinout, M24256-DRMN6TP application, or M24256-DRMN6TP equivalent, key selection criteria include supply voltage range (1.8–5.5 V), identification page lockability, WC-controlled full-array write protection, and TSSOP8 ECOPACK2 RoHS-compliant packaging.
Technical Context
The device implements a slave-only I²C interface with hardware address decoding via E2/E1/E0 pins, supporting standard (100 kHz), fast (400 kHz), and fast-plus (1 MHz) modes. Internal ECC logic corrects single-bit errors per 4-byte group without protocol overhead.
It integrates a power-on-reset circuit, open-drain SDA with external pull-up requirement, and WC input that disables all write operations when high-enabling hardware-level memory protection independent of software state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 Kbyte), organized as 32 K × 8 bits - provides sufficient nonvolatile storage for configuration data, calibration tables, and device identity in space-constrained embedded systems. |
| I²C clock max | 1 MHz - enables high-speed parameter updates during system initialization or field firmware patching without bus contention delays. |
| Supply voltage | 1.8 V to 5.5 V - ensures interoperability with both 1.8 V microcontrollers and legacy 3.3/5 V logic domains without level-shifting. |
| Write time | ≤5 ms for byte or page write - guarantees deterministic timeout handling in real-time applications where write latency must be bounded. |
| Endurance | 4 million write cycles - supports frequent logging or counter updates in telemetry and metering applications over extended service life. |
| Data retention | 200 years at 85 °C - validates long-term reliability for sealed industrial equipment with no field maintenance access. |
| Identification page | 64-byte dedicated area with permanent lock - allows secure storage of cryptographic keys or serial numbers that cannot be overwritten post-deployment. |
Pinout & Package
Supplied in RoHS-compliant, halogen-free TSSOP8 (DW) package, 169 mil width, with exposed pad not connected internally. Pin 1 marked by notch or dot; leads are gull-wing, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E0, E1, E2 | Chip enable inputs | Set 3 LSBs of 7-bit I²C slave address; tied high/low to configure up to 8 devices on same bus without address conflict. |
| SDA | Serial data I/O | Open-drain bidirectional line requiring external pull-up; shares bus with other I²C slaves and master; supports wire-OR arbitration. |
| SCL | Serial clock input | Master-generated clock synchronizing all data transfers; rising edge samples SDA, falling edge drives SDA; defines timing compliance window. |
| WC | Write control input | Hardware write protect: high = disable all writes to memory array and ID page; low or floating = enable writes - immune to software crash or glitch. |
| VCC | Supply voltage | 1.8–5.5 V DC input; requires local 10–100 nF decoupling capacitor near pin to suppress switching noise and ensure POR stability. |
| VSS | Ground reference | Return path for VCC; must be low-impedance connection to system ground plane to maintain I²C signal integrity and ECC reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Identification page with lock | 64-byte dedicated memory region writable once and permanently locked via hardware command - prevents tampering with security-critical identifiers after manufacturing test. |
| Hardware write protection | WC pin disables all write operations regardless of I²C command or address - eliminates risk of accidental overwrite during debug, reset, or firmware update sequences. |
| On-the-fly ECC | Single-bit error correction per 4-byte group, fully transparent to host software - improves read reliability in electrically noisy environments without increasing code footprint. |
| Extended voltage range | 1.8 V minimum operation enables direct interfacing with ultra-low-power MCUs (e.g., STM32L4/L5) without regulator or level shifter - reduces BOM count and PCB area. |
| ECOPACK2 compliance | RoHS-compliant and halogen-free packaging - satisfies environmental regulations for industrial, medical, and automotive end-equipment without derating or special handling. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
|
Use Scenario: Storing I/O mapping, scaling factors, and alarm thresholds in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via I²C during boot and runtime reconfiguration; WC pin held high during normal operation to prevent corruption. Use Value: Enables field-upgradable configuration without firmware change; 200-year data retention ensures calibration validity across equipment lifetime without recalibration cycles. |
Use Scenario: Holding sensor offset/gain coefficients and patient-specific therapy parameters in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for FDA-regulated calibration data; identification page stores device serial number and manufacturing date, locked post-test. Use Value: Meets IEC 62304 traceability requirements; ECC prevents silent data corruption from ESD events during clinical use or transport. |
| Smart Energy Meter Firmware Metadata | Automotive Body Control Module Settings |
|
Use Scenario: Recording firmware version, update timestamp, and cryptographic signature hash in utility-grade electricity meters operating in outdoor substations. IC Role / Device Role / Timing Role: Read-only metadata repository accessed during secure boot verification; powered from meter's 3.3 V rail with 1.8 V tolerance accommodating brownout conditions. Use Value: Supports remote firmware validation and rollback; 4M endurance allows daily log entries for >10 years without wear-out risk. |
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in vehicle body control units subject to wide temperature cycling (-40 °C to +85 °C). IC Role / Device Role / Timing Role: Persistent user preference storage accessible over automotive I²C bus; TSSOP8 package withstands reflow and thermal shock during module assembly. Use Value: Eliminates need for backup battery; guaranteed operation across full AEC-Q200 temperature range ensures reliability in under-hood and door module locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C256-10PU-2.7 | No identification page; 2.7–5.5 V supply only; 100 kHz/400 kHz I²C only (no 1 MHz support) | Lacks hardware-lockable ID page and 1 MHz throughput - unsuitable for secure, high-speed parameter updates in real-time systems | Select when cost sensitivity outweighs security and speed requirements, and full 1.8 V operation is unnecessary. |
| BR24G256FJ-WE2 | 1.7–5.5 V supply; includes WP pin but no dedicated ID page; 1 MHz I²C supported | Provides write protection but no permanent lock mechanism - insufficient for regulatory-mandated immutable serial number storage | Choose if broader voltage margin (1.7 V) is critical and ID page lock is not required for compliance or security policy. |
Compared with AT24C256-10PU-2.7 and BR24G256FJ-WE2, M24256-DRMN6TP uniquely combines 1 MHz I²C, 1.8 V operation, and a permanently lockable identification page - making it the only option among the three that satisfies both high-throughput secure provisioning and extended low-voltage MCU compatibility.
Availability
M24256-DRMN6TP is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data retention, and smart energy meter firmware metadata management requiring stable component supply across multi-year production cycles.
Supply support for M24256-DRMN6TP 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.
M24256-DRMN6TP belongs to ST's serial EEPROM product line, engineered specifically for robust, secure, and low-voltage nonvolatile data storage in safety- and reliability-critical embedded systems.
FAQ
What is the function of the WC pin on M24256-DRMN6TP?
The WC (Write Control) pin is a hardware-level write protect input. When driven high, it disables all write operations-including byte, page, and identification page writes-regardless of I²C command or address. This provides fail-safe protection against accidental or malicious overwrites during power transitions, firmware updates, or system resets. WC must be pulled low or left floating to enable writes.
Can the identification page be unlocked after it is permanently locked?
No. Once the identification page is locked using the Lock ID instruction, the lock is irreversible and cannot be undone by any electrical, software, or physical means. The lock status is verified by issuing a truncated identification page write command: Ack indicates unlocked, NoAck confirms locked state. This one-time locking ensures cryptographic key or serial number immutability for regulatory compliance.
How does the ECC feature operate without affecting I²C communication?
The ECC logic operates entirely internally on each 4-byte group (addresses 4N to 4N+3). It automatically detects and corrects single-bit errors during read operations, with no change to I²C timing, addressing, or data format. Host software reads and writes bytes identically to a standard EEPROM; ECC is transparent and requires no driver modification, configuration, or overhead.
Which package variant does M24256-DRMN6TP correspond to?
M24256-DRMN6TP uses the TSSOP8 (DW) package: 8-lead, thin shrink small outline package, 169 mil (4.3 mm) body width, gull-wing leads, RoHS-compliant and halogen-free (ECOPACK2). The "MN" in the part number denotes this specific TSSOP8 variant, distinct from SO8N, UFDFPN8, or WLCSP options in the M24256-D family.
M24256-DRMN6TP 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:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- I2C
- Clock Frequency:
- 1 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 450 ns
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
M24256-DRMN6TP FAQ
1.How can I place an order for M24256-DRMN6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M24256-DRMN6TP 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 M24256-DRMN6TP reliable?
The price and inventory of M24256-DRMN6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24256-DRMN6TP is usually 5 days.
3.What payment methods are accepted for M24256-DRMN6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24256-DRMN6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24256-DRMN6TP?
M24256-DRMN6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24256-DRMN6TP 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 M24256-DRMN6TP?
For technical support, including M24256-DRMN6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24256-DRMN6TP requirements.
6.How does Aetrix verify that M24256-DRMN6TP is sourced from the original manufacturer or authorized distributors?
All M24256-DRMN6TP 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 M24256-DRMN6TP meets industry standards.
7.What is the process for return or replacement of M24256-DRMN6TP?
All M24256-DRMN6TP units undergo pre-shipment inspection (PSI). If there is an issue with M24256-DRMN6TP, 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 M24256-DRMN6TP part is unused and in its original packaging.
Return procedure for M24256-DRMN6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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