会社ブログについて Mingjiada Supply ST M24256 Serial EEPROM Memory - 256Kbit Serial I2C Bus Electrically Erasable Programmable Memory

Mingjiada Supply ST M24256 Serial EEPROM Memory - 256Kbit Serial I2C Bus Electrically Erasable Programmable Memory

Against the backdrop of growing demand for non-volatile parameter storage in embedded systems, STMicroelectronics’ (ST) M24256 series of 256Kbit serial I²C bus EEPROMs has become a widely adopted storage solution for industrial control, automotive electronics and IoT devices, thanks to its 32KB capacity, 4 million erase/write cycles and data retention of over 200 years. Shenzhen Mingjiada Electronics Co., Ltd. — maintains a long-term stock of the full range of M24256 models, supporting both sample procurement and high-volume BOM fulfilment.

M24256 is a 256 Kbit I²C-compatible EEPROM (Electrically Erasable Programmable Read-Only Memory) with a storage structure of 32 K × 8 bits. The M24256-DR operates at supply voltages ranging from 1.8 V to 5.5 V, with a clock frequency of 1 MHz (or lower), and is designed for an operating temperature range of –40 °C to +85 °C. The M24256-DR provides an additional page known as the identification page (64 bytes). This identification page can be used to store sensitive application parameters, which can (subsequently) be permanently locked in read-only mode.

Analysis of key M24256 parameters:
The M24256 employs a 32K × 8-bit organisation and is accessed via an I²C-compatible serial interface. It supports three bus modes: 100 kHz (standard), 400 kHz (fast) and 1 MHz (Fast-mode Plus), making it compatible with the vast majority of MCU and SoC platforms.
Model: M24256-DRMF3TG
Storage Capacity: 256 Kbit (32 Kbyte) EEPROM
Page Size: 64 bytes; supports both page and byte writing
Operating Voltage: 1.6 V – 5.5 V wide voltage range (some models from 1.7 V)
Operating Temperature: –40 °C to +85 °C (industrial grade); automotive-grade models up to +125 °C
Erase/write endurance: Over 4 million cycles (at 25 °C)
Data retention: Over 200 years (at 55 °C)
Standby current: As low as 310 nA (typical), suitable for battery-powered devices
Write cycle time: ≤ 5 ms for both byte and page writes (typically 3.2 ms)

Key features of the M24256:
Compatible with the following I²C bus modes: 1 MHz, 400 kHz, 100 kHz
Memory array:
256 Kbit (32 Kbyte) EEPROM
Page size: 64 bytes
Additional write-protected pages (M24256-D part number)
Single-supply and high-speed:
Supports a 1 MHz clock at voltages from 1.7 V to 5.5 V
Byte writes completed within 5 milliseconds
Page writes completed within 5 milliseconds
Operating temperature range:
–40 °C to +85 °C
Random and sequential read modes
Write protection for the entire memory array
Enhanced electrostatic discharge (ESD) and lockout protection
Over 4 million write cycles
Data retention for over 200 years

Typical Applications
The ST M24256 I²C EEPROM is widely used in various electronic products that require non-volatile storage of parameters:
- Industrial automation: PLCs, sensors, data acquisition modules and smart meters, for storing calibration coefficients and device configuration parameters
- Internet of Things (IoT) devices: smart gateways and wireless sensor terminals, for storing network configurations, device IDs and log information
- Consumer electronics: home appliance control units, power adaptors, audio equipment, smart home controllers
- Medical devices, portable instruments, charging station control boards, etc., for storing critical data that must not be lost in the event of a power failure

ST’s M24256 is a 256Kbit serial I²C bus EEPROM which, thanks to its wide voltage range, low power consumption, high-speed I²C interface and compact package, is an ideal choice for numerous designs. Mingjiada Electronics has long supplied the ST M24256 series; we offer genuine, original products with ample stock to meet the needs of R&D prototyping, small-batch trial production and large-scale mass production.

For further product information on the [ST] M24256 | 256Kbit Serial I²C Bus EEPROM or to enquire about sample prices, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply details.
Tags: M24256-DRMF3TG, M24256-DRMF3T, M24256-DRMF3, M24256-DRMF, M24256-DRM, M24256-DR, M24256-D, M24256