M24256X-F Datasheet 256-Kbit serial IC bus EEPROM with configurable device address and software write protection, delivered in 4-ball WLCSP Features 2 Compatible with following I C bus modes: 1 MHz (Fast-mode Plus) 400 kHz (Fast-mode) 100 kHz (Standard-mode) WLCSP (CU) Memory array: 256 Kbit (32 Kbytes) of EEPROM Page size: 64 bytes Additional identification page Configurable device address register Software write protection register Single supply voltage: 1.6 to 3.6 V Operating temperature range: -40 C up to +85 C Unsawn wafer Write cycle time: Byte write within 5 ms Page write within 5 ms Random and sequential read modes Enhanced ESD / latch-up protection More than 4 million write cycles More than 200-year data retention Package Product status link WLCSP 4-ball (ECOPACK2) M24256X-F Unsawn wafer (each die is tested) DS12380 - Rev 2 - July 2021 www.st.com For further information contact your local STMicroelectronics sales office.M24256X-F Description 1 Description 2 The M24256X-F is a 256-Kbit I C-compatible EEPROM (electrically erasable programmable memory) organized as 32 K 8 bits. The M24256X-F can operate with a supply voltage from 1.65 V to 3.6 V, with a clock frequency up to 1 MHz, over an ambient temperature range from -40 C to +85 C. It can also operate down to 1.6 V, under some restricting conditions. The M24256X-F offers three additional features, namely a 64-byte page, named identification page, which can be used to store sensitive application parameters that can be (later) permanently locked in read-only mode, a first 8-bit register, named configurable device address (CDA) register, authorizing the user, through software, to configure up to eight possibilities of chip enable address, and a second 8-bit register, named software write protection (SWP) register, authorizing the user, through software, to write protect a part or the full memory array. Figure 1. Logic diagram VCC SCL SDA M24256X-F V SS Table 1. Signal names Signal name Function Direction SDA Serial data I/O SCL Serial clock Input V Supply voltage - CC V SS Ground - DS12380 - Rev 2 page 2/42