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STMicroelectronics M24256-BRCS6TP/A
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- Part No.:
- M24256-BRCS6TP/A
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 8-UFBGA
- Datasheet:
-
M24256-BRCS6TP/A.pdf
- Description:
- IC EEPROM 256KBIT I2C 8WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,975
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Product details
Overview
M24256-BRCS6TP/A 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-BRCS6TP/A datasheet, M24256-BRCS6TP/A pinout, M24256-BRCS6TP/A application, or M24256-BRCS6TP/A equivalent, key selection criteria include supply voltage range (1.8–5.5 V), I²C bus speed compatibility (100 kHz/400 kHz/1 MHz), page size (64 bytes), write endurance (>4 million cycles), and package-specific pin mapping for TSSOP8.
Technical Context
The device implements a standard I²C slave protocol with 7-bit device addressing, configurable chip enable (E2/E1/E0) for up to eight devices on one bus, and dedicated write control (WC) input for full-array hardware lock. Internal ECC logic corrects single-bit errors per 4-byte group without software intervention.
It supports three read modes - random, current address, and sequential - and two write modes - byte and page - with automatic address roll-over at page boundaries. The internal HV generator enables erase/write operations without external high-voltage supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32 K × 8 bits) - provides sufficient nonvolatile storage for firmware configuration, sensor calibration tables, and device identity data. |
| I²C Clock Frequency | Up to 1 MHz - enables fast parameter updates in real-time systems without requiring extended bus occupancy. |
| Supply Voltage Range | 1.8 V to 5.5 V - ensures interoperability across mixed-voltage designs including 3.3 V microcontrollers and legacy 5 V systems. |
| Page Write Time | ≤5 ms - allows burst writes of up to 64 bytes with predictable timing for deterministic system-level scheduling. |
| Data Retention | 200 years at +25 °C - guarantees long-term integrity of stored calibration coefficients and security keys over product lifetime. |
| Write Endurance | 4 million cycles - supports frequent field-updatable parameters such as energy metering logs or adaptive tuning values. |
| Operating Temperature | −40 °C to +85 °C - qualified for deployment in industrial automation, automotive body electronics, and outdoor IoT gateways. |
Pinout & Package
Package: TSSOP8 (DW), 169 mil width, RoHS-compliant ECOPACK2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E0 | Chip Enable LSB | Configures device address bits b1–b3; tied high/low to select one of eight possible I²C addresses on shared bus. |
| E1 | Chip Enable MSB | Part of 3-bit hardware address encoding; floating defaults to logic low, enabling deterministic multi-device addressing. |
| E2 | Chip Enable MSB | Completes 3-bit chip enable code; used with E0/E1 to avoid address conflicts in stacked or modular systems. |
| SDA | Serial Data I/O | Open-drain bidirectional line; requires external pull-up; carries address, command, and data during I²C transactions. |
| SCL | Serial Clock Input | Master-generated clock synchronizing all data transfers; sampled on rising edge for input, drives output timing. |
| WC | Write Control | Active-high hardware lock disabling all write operations; prevents accidental overwrites during power transients or firmware faults. |
| VCC | Supply Voltage | 1.8–5.5 V DC input; decoupling capacitor (10–100 nF) required near pin for stable internal charge pump operation. |
| VSS | Ground Reference | Return path for VCC and internal logic; must be low-impedance connection to minimize noise coupling into SDA/SCL lines. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Write Protection | WC pin disables all writes when driven high - eliminates need for software-based lock mechanisms and reduces firmware complexity. |
| Internal ECC Logic | Single-bit error correction per 4-byte group - improves reliability of stored calibration data without host-side error handling overhead. |
| Multi-Voltage Operation | 1.8–5.5 V supply range - simplifies BOM consolidation across 3.3 V and 5 V platforms without level-shifter components. |
| Page Write Capability | 64-byte page buffer - reduces I²C transaction count by >98% vs. byte-write for bulk updates (e.g., 2 KB firmware patch). |
| Enhanced ESD/Latch-up Immunity | ±4 kV HBM ESD rating - meets industrial IEC 61000-4-2 requirements without external protection diodes. |
Applications
| Industrial Sensor Node | Smart Energy Meter |
|---|---|
|
Use Scenario: Storing factory-calibrated temperature/humidity offset values and sensor linearization coefficients. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed 200-year retention and 4M-cycle endurance for field recalibration events. Use Value: Eliminates need for external calibration EEPROM or MCU flash wear-leveling routines, reducing firmware maintenance burden. |
Use Scenario: Holding tariff schedules, billing cycle counters, and tamper-event logs in utility-grade meters. IC Role / Device Role / Timing Role: Secure, write-protected memory for revenue-critical data; WC pin prevents unauthorized modification during live operation. Use Value: Meets ANSI C12.22 and IEC 62056 compliance requirements for data integrity under extended temperature and voltage stress. |
| Automotive Body Control Module | Medical Diagnostic Device |
|
Use Scenario: Saving seat/mirror position presets, lighting profiles, and user preferences across ignition cycles. IC Role / Device Role / Timing Role: I²C slave with 1 MHz support enabling fast recall of 32 KB of user settings within <100 ms of power-on. Use Value: Enables seamless user experience without boot-time delays; TSSOP8 package fits tight PCB space constraints. |
Use Scenario: Archiving calibration constants for analog front-end gain/offset compensation and diagnostic self-test results. IC Role / Device Role / Timing Role: High-reliability storage with ECC protection ensuring accuracy of life-critical measurement parameters. Use Value: Reduces risk of calibration drift-induced misdiagnosis; supports ISO 13485 traceability via locked identification page option. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT24C256-SSHL-T (Microchip) | 256 Kbit, 1.8–5.5 V, 400 kHz max I²C speed, no WC pin, no ECC | Lacks hardware write lock and error correction - requires software-managed protection and periodic integrity checks | Select when cost sensitivity outweighs need for hardware-level write safety and ECC-assisted reliability |
| BR24G256FJ-WE2 (ROHM) | 256 Kbit, 1.7–5.5 V, 1 MHz I²C, WC pin present, no ECC, 1 million write cycles | Lower endurance (1M vs. 4M cycles) and no built-in ECC - less suitable for high-frequency recalibration use cases | Prefer for consumer-grade applications where recalibration frequency is low and BOM cost is primary constraint |
Compared with AT24C256-SSHL-T and BR24G256FJ-WE2, M24256-BRCS6TP/A delivers superior long-term reliability through integrated ECC and double the write endurance, while its WC pin provides deterministic hardware-level protection absent in the Microchip part and more robust than ROHM's implementation.
Availability
M24256-BRCS6TP/A is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, automotive body control modules, and medical diagnostic devices requiring stable component supply across multi-year production cycles.
Supply support for M24256-BRCS6TP/A 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 microcontrollers, power management, sensors, and memory solutions for industrial, automotive, and consumer markets.
M24256-BRCS6TP/A belongs to ST's M24 series of I²C EEPROMs, designed specifically for robust, low-power, high-reliability nonvolatile storage in harsh environments with wide voltage and temperature ranges.
FAQ
What is the function of the WC pin on M24256-BRCS6TP/A?
The WC (Write Control) pin is an active-high hardware lock that disables all write operations to the entire memory array when driven high. When WC is low or floating, writes are enabled. This feature prevents accidental overwrites during power-up, brown-out, or firmware exceptions without requiring software intervention.
Does M24256-BRCS6TP/A support 1 MHz I²C communication at 1.8 V?
Yes - the M24256-BRCS6TP/A supports full 1 MHz I²C operation across its entire 1.8 V to 5.5 V supply range. This is confirmed in Section 1 of the DS1766 datasheet (Rev 35), which specifies "1 MHz clock from 1.7 V to 5.5 V" for the -BF/-DF variants and "1 MHz clock from 1.8 V to 5.5 V" for -BR/-DR variants; the -BRCS6TP/A falls under the -BR family.
How does the internal ECC logic affect write endurance?
The ECC logic operates transparently on groups of four consecutive bytes. Each write to any byte in a 4-byte group also cycles the other three bytes in that group. Therefore, total endurance is budgeted per group: the sum of write cycles across all four bytes must not exceed 4 million. This design ensures bit-level reliability without compromising overall endurance for typical usage patterns.
Can M24256-BRCS6TP/A be used in place of M24256-BW or M24256-BF?
No - M24256-BRCS6TP/A is functionally identical to M24256-BR but differs in packaging (TSSOP8) and marking. It is not a drop-in replacement for M24256-BW (2.5–5.5 V only) or M24256-BF (1.7–5.5 V, different ECOPACK2 variant). Voltage range compatibility must be verified: -BR supports 1.8–5.5 V, while -BW starts at 2.5 V and -BF extends down to 1.7 V.
M24256-BRCS6TP/A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-UFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-WLCSP
M24256-BRCS6TP/A FAQ
1.How can I place an order for M24256-BRCS6TP/A through Aetrix?
Please submit a Request for Quotation (RFQ) for M24256-BRCS6TP/A 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-BRCS6TP/A reliable?
The price and inventory of M24256-BRCS6TP/A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M24256-BRCS6TP/A is usually 5 days.
3.What payment methods are accepted for M24256-BRCS6TP/A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M24256-BRCS6TP/A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M24256-BRCS6TP/A?
M24256-BRCS6TP/A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M24256-BRCS6TP/A 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-BRCS6TP/A?
For technical support, including M24256-BRCS6TP/A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M24256-BRCS6TP/A requirements.
6.How does Aetrix verify that M24256-BRCS6TP/A is sourced from the original manufacturer or authorized distributors?
All M24256-BRCS6TP/A 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-BRCS6TP/A meets industry standards.
7.What is the process for return or replacement of M24256-BRCS6TP/A?
All M24256-BRCS6TP/A units undergo pre-shipment inspection (PSI). If there is an issue with M24256-BRCS6TP/A, 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-BRCS6TP/A part is unused and in its original packaging.
Return procedure for M24256-BRCS6TP/A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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