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STMicroelectronics M24256-BRMN6TP
- Part No.:
- M24256-BRMN6TP
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M24256-BRMN6TP.pdf
- Description:
- IC EEPROM 256KBIT I2C 1MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:16,506
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Product details
Overview
M24256-BRMN6TP from STMicroelectronics is a 256-Kbit I²C-compatible serial EEPROM organized as 32 K × 8 bits, operating from 1.8 V to 5.5 V with 1 MHz clock support. It features 64-byte page write, hardware write protection via WC pin, and enhanced ESD/latch-up immunity. Used in industrial control modules for parameter storage and calibration data retention.
For engineers reviewing the M24256-BRMN6TP datasheet, M24256-BRMN6TP pinout, M24256-BRMN6TP application, or M24256-BRMN6TP equivalent, key selection factors include supply voltage range (1.8–5.5 V), guaranteed 4M write cycles, -40 °C to +85 °C operation, TSSOP8 package compatibility, and I²C bus mode support up to 1 MHz.
Technical Context
The device implements a fully compliant I²C slave interface with start/stop detection, ACK/NACK handshaking, and 7-bit device addressing with three chip-enable inputs (E2–E0) for multi-device bus configuration. Internal ECC logic corrects single-bit errors per 4-byte group without protocol visibility.
It integrates a high-voltage generator and sequencer for internal write cycling, supports random/sequential read modes, and uses a dedicated write control (WC) input to disable all memory writes when driven high - independent of I²C transaction state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 Kbyte), organized as 32 K × 8 bits - sufficient for firmware patch storage or device configuration tables |
| Interface | I²C bus, 1 MHz max clock - enables fast parameter updates in real-time embedded systems |
| Supply voltage | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V microcontrollers and legacy 5 V systems |
| Write time | ≤5 ms for byte or page write - ensures deterministic latency in time-critical logging applications |
| Data retention | 200 years at 25 °C - guarantees long-term reliability in unattended infrastructure equipment |
| Endurance | 4 million write cycles - allows frequent recalibration or event logging over product lifetime |
| Operating temp | -40 °C to +85 °C - qualified for industrial automation and automotive body-control modules |
Pinout & Package
Supplied in RoHS-compliant, halogen-free TSSOP8 (DW) package, 169 mil width, with exposed pad option available for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: E2 | Chip enable (LSB) | Configures device address bits b1 of 7-bit I²C select code; tied high/low to assign unique bus address |
| 2: E1 | Chip enable (middle) | Configures device address bit b2; enables up to 8 devices on same I²C bus with distinct addresses |
| 3: E0 | Chip enable (MSB) | Configures device address bit b3; floating defaults to low, allowing minimal external wiring |
| 4: VSS | Ground reference | Return path for all internal logic and I/O; requires low-impedance connection to system ground plane |
| 5: SDA | Serial data I/O | Open-drain bidirectional line; requires external pull-up resistor (typically 2.2–10 kΩ) to VCC |
| 6: SCL | Serial clock input | Master-generated clock; rising edge samples SDA, falling edge drives SDA - defines timing compliance window |
| 7: WC | Write control | Hardware lock: high = full memory write disabled; low or floating = write enabled - no software dependency |
| 8: VCC | Power supply | 1.8–5.5 V DC input; decoupling capacitor (10–100 nF) required near pin for noise immunity during write cycles |
Key Features
| Feature | Design Value |
|---|---|
| Page write capability | 64-byte pages aligned to internal memory boundaries - reduces I²C transaction count for bulk configuration updates |
| Hardware write protect | Dedicated WC pin disables all writes regardless of I²C command - prevents corruption during power transients |
| ECC error correction | Single-bit correction per 4-byte group - improves read reliability in electrically noisy industrial environments |
| Identification page (M24256-D variant) | 64-byte dedicated area with permanent lock capability - stores cryptographic keys or calibration constants securely |
| ECOPACK2 compliance | RoHS-compliant and halogen-free packaging - meets EU environmental directives without performance trade-offs |
Applications
| Industrial PLC Configuration Storage | Smart Meter Calibration Data Retention |
|---|---|
|
Use Scenario: Storing runtime-configurable I/O mapping and alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed via I²C during boot and field update; WC pin hardwired to prevent accidental overwrite during transient faults. Use Value: Enables field reconfiguration without firmware reload; 4M endurance supports >10 years of daily parameter adjustments. |
Use Scenario: Holding metrology calibration coefficients and tamper-event logs in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, low-power EEPROM interfaced to metrology SoC; operates across full -40 °C to +85 °C range with guaranteed data integrity. Use Value: ECC ensures accurate coefficient reads under EMI stress; 200-year retention eliminates need for periodic recalibration. |
| Automotive Body Control Module | Medical Infusion Pump Settings |
|
Use Scenario: Saving user preferences (mirror position, seat memory) and fault history in 12 V automotive body domain controllers. IC Role / Device Role / Timing Role: I²C slave on LIN-to-I²C bridge; powered from 3.3 V LDO; WC pin controlled by MCU GPIO for selective write enable. Use Value: 1.8 V min supply allows direct use with 3.3 V MCU I/O; TSSOP8 footprint fits tight PCB layouts near microcontroller. |
Use Scenario: Storing drug library profiles, dose limits, and audit trails in FDA Class II infusion pumps requiring traceable configuration. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory; write operations validated via ACK polling to confirm completion before next dose step. Use Value: ≤5 ms write time enables responsive UI feedback; ECOPACK2 materials meet ISO 10993 biocompatibility support requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C256-10PU-2.7 | 256 Kbit I²C EEPROM, 2.7–5.5 V supply, 400 kHz max clock, SO8 package only | Lacks WC pin and ECC; no 1 MHz support; not rated for 1.8 V operation | Select when cost sensitivity outweighs speed, voltage flexibility, and reliability enhancements |
| BR24G256FJ-WE2 | 256 Kbit I²C EEPROM, 1.7–5.5 V, 1 MHz, built-in write protect register (software-controlled) | No dedicated WC pin; write protection requires I²C command sequence; no ECC | Prefer when firmware-managed protection suffices and TSSOP8 footprint is not required |
Compared with AT24C256-10PU-2.7 and BR24G256FJ-WE2, M24256-BRMN6TP provides hardware-level write disable, ECC-enhanced read integrity, and broader 1.8–5.5 V operation - critical for robustness in industrial and medical edge devices where deterministic behavior and long-term data fidelity are mandatory.
Availability
M24256-BRMN6TP is available at Aetrix Electronics and suitable for industrial PLCs, smart metering systems, automotive body control units, and medical infusion pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M24256-BRMN6TP 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 belongs to ST's serial EEPROM product line, engineered specifically for high-reliability, low-power, and wide-voltage-range nonvolatile storage in space-constrained embedded systems with stringent data integrity requirements.
FAQ
What is the function of the WC pin on M24256-BRMN6TP?
The WC (Write Control) pin is a hardware-level write inhibit input. When driven high, it disables all write operations-including byte, page, and identification page writes-regardless of I²C commands sent. This provides fail-safe protection against unintended memory modification during power-up, brown-out, or software glitches. WC can be left floating (default low) or tied to VCC for permanent lock.
Does M24256-BRMN6TP support 1 MHz I²C operation across its full voltage range?
Yes. M24256-BRMN6TP supports 1 MHz I²C clock frequency from 1.8 V to 5.5 V, as verified in ST's DS1766 Rev 35 AC characteristics (Table 10). This enables faster parameter loading than 400 kHz EEPROMs, reducing boot time in systems where rapid configuration retrieval is critical.
How does the ECC feature operate, and does it affect memory access timing?
ECC performs transparent single-bit error correction per 4-byte group during read operations only. It adds no timing overhead to reads or writes - the correction logic is fully integrated into the sense amplifier path. Writes to any byte automatically cycle the entire 4-byte group, distributing endurance wear but preserving per-byte addressing transparency.
Can M24256-BRMN6TP be used in place of M24256-BR without design changes?
Yes. M24256-BRMN6TP is the TSSOP8 (DW) variant of the M24256-BR family, sharing identical electrical specifications, pinout, and functionality. The "MN6TP" suffix denotes TSSOP8 package, ECOPACK2 compliance, tape-and-reel packaging, and industrial temperature grade - no schematic or firmware modifications are needed for drop-in replacement.
M24256-BRMN6TP 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:
- 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-BRMN6TP FAQ
1.How can I place an order for M24256-BRMN6TP through Aetrix?
Please submit a Request for Quotation (RFQ) for M24256-BRMN6TP 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-BRMN6TP reliable?
The price and inventory of M24256-BRMN6TP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24256-BRMN6TP is usually 5 days.
3.What payment methods are accepted for M24256-BRMN6TP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24256-BRMN6TP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24256-BRMN6TP?
M24256-BRMN6TP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24256-BRMN6TP 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-BRMN6TP?
For technical support, including M24256-BRMN6TP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24256-BRMN6TP requirements.
6.How does Aetrix verify that M24256-BRMN6TP is sourced from the original manufacturer or authorized distributors?
All M24256-BRMN6TP 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-BRMN6TP meets industry standards.
7.What is the process for return or replacement of M24256-BRMN6TP?
All M24256-BRMN6TP units undergo pre-shipment inspection (PSI). If there is an issue with M24256-BRMN6TP, 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-BRMN6TP part is unused and in its original packaging.
Return procedure for M24256-BRMN6TP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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