M24C256-RMN6TP - 256Kbit I2C EEPROM, SOIC-8 | STMicroelectronics
料号： M24C256-RMN6TP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.45 | $0.45 |
| 10 | $0.4 | $4.00 |
| 100 | $0.35 | $35.00 |
| 500 | $0.3 | $150.00 |
| 1,000 | $0.25 | $250.00 |
M24C256-RMN6TP 概述
An EEPROM (Electrically Erasable Programmable Read-Only Memory) is a non-volatile memory that retains data when power is removed, and can be electrically erased and reprogrammed. It is a type of non-volatile memory (NVM) that sits within the memory hierarchy between volatile RAM and permanent storage like flash. EEPROMs are used for storing configuration parameters, calibration data, device IDs, and small amounts of firmware that require in-system updates. The M24C256 is part of the M24Cxx family of I2C EEPROMs from STMicroelectronics, which are widely used in industrial, automotive, and consumer electronics.
Key features include a 256-Kbit memory size, I2C interface with 400 kHz clock, 1.8V to 5.5V supply voltage, 5 ms write cycle time, 32-byte page write, and a write protect pin for hardware data protection. The device also supports sequential read and write operations, and has a 1,000,000 write/erase cycle endurance and 40-year data retention, ensuring reliable long-term data storage.
The M24C256 uses a standard I2C two-wire interface (SCL and SDA) with a 7-bit device address, allowing up to 8 devices on the same bus. The device includes a write protect (WC) pin that, when tied high, prevents write operations to the entire memory array. The SOIC-8 package is industry-standard and pin-compatible with many other 256-Kbit I2C EEPROMs, enabling easy drop-in replacement in existing designs.
Typical applications include storing configuration parameters in industrial sensors, calibration data in medical devices, device settings in consumer electronics, and firmware parameters in automotive ECUs. The wide voltage range and low power consumption make it suitable for battery-powered IoT devices.
When designing with this device, ensure proper pull-up resistors on the SCL and SDA lines (typically 4.7kΩ for 400 kHz operation) and decouple the VCC pin with a 0.1µF ceramic capacitor. The write protect pin should be tied to ground if write protection is not needed, and the address pins (A0, A1, A2) should be tied to VCC or GND to set the device address.
直接替换替代料： M24C256-RMN6TP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： M24C256-RMN6TP （相同外形与封装尺寸） ——差异在于 Data Retention, Memory Size, Package.
快速对比工具——选择替代料号进行并排对比：
M24C256-WMN6TP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
M24C256-DRMN3TP/K
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
AT24C256C-SSHL-B
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CAT24C256WI-GT3
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
24LC256-I/SN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
M24C256-RMN6TP 规格参数
| 存储容量 | 256 Kbit (32K x 8) |
| 接口类型 | I2C |
| Clock Frequency | 400 kHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Write Cycle Time | 5 ms |
| Page Write Size | 32 bytes |
| Write Endurance | 1,000,000 write/erase cycles |
| Data Retention | 40 years |
| 工作温度范围 | -40C to +85C |
| 封装 | SOIC-8 (MN) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
M24C256-RMN6TP 引脚配置
| 引脚 1 | A0 — Address input 0 |
| 引脚 2 | A1 — Address input 1 |
| 引脚 3 | A2 — Address input 2 |
| 引脚 4 | VSS — Ground |
| 引脚 5 | SDA — Serial data input/output |
| 引脚 6 | SCL — Serial clock input |
| 引脚 7 | WC — Write protect |
| 引脚 8 | VCC — Power supply |
典型应用
M24C256-RMN6TP 适用于 6 应用s: Industrial Sensor Calibration, Medical Device Configuration, Consumer Electronics Settings, Automotive ECU Parameter Storage, IoT Device Data Logging, Networking Equipment Configuration.
Industrial Sensor Calibration
The M24C256-RMN6TP is used to store calibration coefficients and configuration parameters in industrial sensors. Its 256-Kbit capacity allows storing multiple calibration tables, and the I2C interface enables easy read/write access by a microcontroller. The wide voltage range (1.8V to 5.5V) ensures compatibility with various sensor supply voltages. The 1,000,000 write cycles and 40-year data retention ensure long-term reliability in harsh industrial environments. In a typical application, the EEPROM is connected to the sensor's microcontroller via I2C, with pull-up resistors on SCL and SDA. The write protect pin can be used to prevent accidental overwrites during operation. The 5 ms write cycle time allows efficient calibration updates, and the 32-byte page write enables fast programming of multiple parameters at once.
推荐
Medical Device Configuration
In medical devices, the M24C256-RMN6TP stores device settings, patient data, and calibration information. Its non-volatile memory ensures data is retained during power loss, which is critical for patient safety. The industrial temperature range (-40C to +85C) covers most medical environments. The I2C interface simplifies integration with medical-grade microcontrollers. The 40-year data retention ensures long-term data integrity. In a typical application, the EEPROM is used to store device serial numbers, manufacturing date, and calibration data. The write protect pin can be used to lock critical data. The 5 ms write cycle time allows quick updates, and the 32-byte page write enables efficient storage of configuration blocks.
推荐
Consumer Electronics Settings
The M24C256-RMN6TP is used in consumer electronics to store user preferences, device settings, and firmware parameters. Its small SOIC-8 package is ideal for space-constrained designs. The wide voltage range (1.8V to 5.5V) supports both 3.3V and 5V systems. The 400 kHz I2C interface provides fast read/write access. The 1,000,000 write cycles ensure durability for frequent updates. In a typical application, the EEPROM stores display settings, audio preferences, and network configuration. The write protect pin can be used to prevent accidental changes. The 5 ms write cycle time is acceptable for user-initiated changes, and the 32-byte page write allows efficient storage of settings blocks.
推荐
Automotive ECU Parameter Storage
The M24C256-RMN6TP is used in automotive ECUs to store calibration parameters, VIN numbers, and diagnostic data. Its wide voltage range (1.8V to 5.5V) and industrial temperature range (-40C to +85C) make it suitable for automotive environments. The 1,000,000 write cycles and 40-year data retention ensure long-term reliability. The I2C interface is widely supported in automotive microcontrollers. In a typical application, the EEPROM stores engine calibration maps and fault codes. The write protect pin can be used to prevent unauthorized writes. The 5 ms write cycle time is sufficient for occasional updates, and the 32-byte page write enables efficient storage of calibration tables.
推荐
IoT Device Data Logging
The M24C256-RMN6TP is used in IoT devices to store sensor data, device credentials, and configuration parameters. Its low power consumption and wide voltage range (1.8V to 5.5V) are ideal for battery-powered devices. The 256-Kbit capacity allows storing a significant amount of data. The I2C interface is simple and widely supported. The 1,000,000 write cycles and 40-year data retention ensure data integrity. In a typical application, the EEPROM stores device ID, Wi-Fi credentials, and sensor calibration data. The write protect pin can be used to secure credentials. The 5 ms write cycle time is acceptable for periodic data logging, and the 32-byte page write enables efficient storage of data blocks.
推荐
Networking Equipment Configuration
The M24C256-RMN6TP is used in networking equipment to store MAC addresses, configuration settings, and firmware parameters. Its wide voltage range (1.8V to 5.5V) supports various logic levels. The 400 kHz I2C interface provides fast access. The 1,000,000 write cycles and 40-year data retention ensure long-term reliability. In a typical application, the EEPROM stores device configuration and network settings. The write protect pin can be used to prevent accidental overwrites. The 5 ms write cycle time is acceptable for configuration updates, and the 32-byte page write enables efficient storage of configuration blocks.
推荐
推荐产品汇总
工程参考数据： M24C256-RMN6TP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | M24C256-WMN6TP | M24C256-DRMN3TP/K | AT24C256C-SSHL-B | CAT24C256WI-GT3 | 24LC256-I/SN |
|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | Microchip Technology | onsemi | Microchip Technology |
| Memory Size | 256 Kbit | 256 Kbit | 256 Kbit | 256 Kbit | 256 Kbit | 256 Kbit |
| Interface | I2C | I2C | I2C | I2C | I2C | I2C |
| Clock Frequency | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz | 400 kHz |
| Supply Voltage Range | 1.8V to 5.5V | 2.5V to 5.5V | 1.8V to 5.5V | 1.7V to 5.5V | 1.8V to 5.5V | 2.5V to 5.5V |
| Write Cycle Time | 5 ms | 5 ms | 5 ms | 5 ms | 5 ms | 5 ms |
| Page Write Size | 32 bytes | 32 bytes | 32 bytes | 64 bytes | 64 bytes | 64 bytes |
关键差异点
- Wide voltage range (1.8V to 5.5V) （对比 M24C256-WMN6TP)
- Automotive grade option available （对比 M24C256-DRMN3TP/K)
- Same-brand drop-in compatibility （对比 AT24C256C-SSHL-B)
设计说明
Place pull-up resistors (typically 4.7kΩ) on the SCL and SDA lines for I2C communication. For 400 kHz operation, the bus capacitance should be kept below 400 pF. Decouple the VCC pin with a 0.1µF ceramic capacitor placed as close to the pin as possible. Ensure the write protect (WC) pin is tied to ground if write protection is not needed, and address pins (A0, A1, A2) are tied to VCC or GND to set the device address.
Do not exceed the maximum supply voltage of 5.5V. Ensure the I2C bus voltage does not exceed VCC. When writing to the device, wait for the write cycle time (5 ms) before initiating the next write. Use proper I2C addressing to avoid conflicts with other devices on the bus. The write protect pin should be handled carefully to prevent accidental writes.
The M24C256-RMN6TP has low power dissipation, so thermal management is generally not a concern. However, in high-temperature environments (up to +85C), ensure the device is not placed near heat sources. The SOIC-8 package has a thermal resistance of approximately 150 C/W, so for most applications, no additional heatsinking is required.
合规信息
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified - choose M24C256-DRMN3TP/K for automotive.
