EEPROM Memory IC 256Kbit I2C 1 MHz 450 ns 8-SO
The M24256E-FMN6TP is a 256-Kbit (32 Kbyte) I²C-compatible serial EEPROM from STMicroelectronics. It is designed for reliable, non-volatile data storage in a wide range of electronic applications including consumer, industrial, and automotive systems.
The device supports standard (100 kHz), fast (400 kHz), and fast-mode plus (1 MHz) I²C communication, enabling efficient data transfer. It features byte and page write operations, low power consumption, and a high endurance of write cycles, making it suitable for frequent data logging and configuration storage.
Housed in a compact SO8 package, the device is optimized for space-constrained PCB designs while maintaining robust performance and data retention capabilities.
Key Features
Memory size: 256 Kbit (32 Kbyte)
Interface: I²C (2-wire serial interface)
Clock frequency:
Standard mode: 100 kHz
Fast mode: 400 kHz
Fast-mode Plus: 1 MHz
Supply voltage range: 1.7 V to 5.5 V
Page write capability: up to 64 bytes
Write cycle time: ~5 ms (typical)
Data retention: > 200 years
Endurance: > 4 million write cycles
Hardware write protection available
ESD protection and latch-up immunity
Functional Description
The device operates as a slave on the I²C bus and supports:
Byte write and read
Page write (up to 64 bytes)
Random and sequential read operations
Memory addressing is internally managed using a 16-bit address pointer, allowing access to the full 32 KB memory array. The device includes an internal write cycle controller, eliminating the need for external timing management.
Pin Configuration (SO8 Package)
A0, A1, A2: Device address inputs
VSS: Ground
SDA: Serial data line
SCL: Serial clock line
WC: Write control (hardware write protection)
VCC: Supply voltage
Absolute Maximum Ratings
Supply voltage (VCC): -0.3 V to 6.5 V
Input voltage: -0.3 V to VCC + 0.6 V
Storage temperature: -65°C to +150°C
Operating temperature (industrial grade): -40°C to +85°C
Electrical Characteristics
Low standby current: < 1 µA (typical)
Operating current: < 1 mA
Input/output compatible with CMOS logic levels
Schmitt trigger inputs for noise immunity
Timing Characteristics
Write cycle time: 5 ms (typical)
Fast-mode Plus support up to 1 MHz
Sequential read supports continuous data streaming
Package Information
Package type: SO8 (8-lead Small Outline)
Mounting: Surface-mount (SMD)
Tape & reel packaging (TP suffix)
Applications
Configuration storage
Calibration data storage
Data logging systems
Industrial control systems
Consumer electronics
Embedded systems requiring non-volatile memory
Advantages
High endurance and long data retention
Wide voltage range (ideal for mixed-voltage systems)
Compact footprint
High-speed I²C compatibility (up to 1 MHz)
