25LC040X/ST

Series:	--
Packaging:	Tube
Part Status:	Active
Memory Type:	Non-Volatile
Memory Format:	EEPROM
Technology:	EEPROM
Memory Size:	4Kb (512 x 8)
Clock Frequency:	2MHz
Write Cycle Time - Word, Page:	5ms
Memory Interface:	SPI
Voltage - Supply:	2.5 V ~ 5.5 V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	8-TSSOP
Base Part Number:	25LC040X

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<p>The 25LC040X/ST is a single-supply 4K SPI serial EEPROM memory device. It is an ideal choice for a wide range of applications requiring high-speed SPI-compatible serial EEPROMs. This device offers sector-level write protection, extended endurance and reliable data management for storing data-sensitive information.</p><p>The 25LC040X/ST has a 4K x 8-bit organization and can be accessed through an SPI-compatible three-wire serial interface. The interface consists of a serial data line (SI), a serial clock line (SCK), and a slave select line (S).</p><p>The 25LC040X/ST provides a sector-level write protection feature that allows the user to protect entire 4K/32K byte sectors from being written, and can also operate in byte-erase mode. The device also provides enhanced endurance, data security, and write cycle reliability, with a maximum write endurance of 10,000 cycles.</p><p>The 25LC040X/ST has an operating voltage range of 1.8 V to 5.5 V, allowing it to be used for a wide range of applications. The device is offered in a wide range of packages, including PDIP, SOIC, and TSSOP, for use in applications where tiny footprints are required.</p><h2>Application Field</h2><p>The 25LC040X/ST is well suited for industrial applications which require EEPROM storage with write protection, enhanced endurance, and data security. Typical applications include data storage for automotive systems, consumer products, medical devices, and industrial control systems.</p><p>In automotive systems, the 25LC040X/ST can be used to store configuration information, such as the settings of electronic control units (ECUs) or read/write memories, such as the data of injection systems. In consumer products, it can be used to store system settings, like multimedia player settings, or user data, such as saved games or phone books.</p><p>In medical systems, the 25LC040X/ST can be used to store patient information, such as patient medical records or identification numbers. In industrial control systems, it can be used to store configuration information, such as system settings or calibration data.</p><h2>Working Principle</h2><p>The 25LC040X/ST is a serial EEPROM memory device, which means that it is accessed via an SPI-compatible 3-wire serial interface. The interface consists of a serial data line (SI), a serial clock line (SCK), and a slave select line (S). The SPI bus is a synchronous, full-duplex bus that supports multiple device configurations.</p><p>The 25LC040X/ST supports multiple data transfers, including write, read, erase, and sector write protection. The write operation requires a minimum of four write cycles and can be done in either byte or sector mode. When in byte mode, the device can be written one byte at a time. When in sector mode, the device can be written up to 32 bytes at a time.</p><p>The read operation is the most common operation, and can be done one byte or multiple bytes at a time. The erase operation is used to erase the entire 4K/32K byte memory array. The sector write protection operation is used to protect the entire 4K/32K byte sectors from being written.</p>

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