M24C02-WBN6P

Write Cycle Time - Word, Page:	5ms
Base Part Number:	M24C02
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Voltage - Supply:	2.5 V ~ 5.5 V
Memory Interface:	I²C
Access Time:	900ns
Series:	--
Clock Frequency:	400kHz
Memory Size:	2Kb (256 x 8)
Technology:	EEPROM
Memory Format:	EEPROM
Memory Type:	Non-Volatile
Part Status:	Obsolete
Packaging:	Tube

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Memory: M24C02-WBN6P Application Fields and Working Principles

M24C02-WBN6P, developed by STMicroelectronics, is an electrically erasable programmable read-only memory (EEPROM) operated by I2C serial interface. It contains 32K bits of memory, organized as 2048 pages, each page comprising 16 bytes of data. Consisting of 8 pins, the device operates with a supply voltage of 1.7V – 5.5V. Simple yet reliable, this EEPROM is used in a variety of applications including data logging, controlling systems, and so forth.

Application Field

The M24C02-WBN6P can be used in a n umber of different applications. One such application field is automotive systems. The device finds a particular use in advanced driver assistance systems (ADAS). These are assistance systems that use various computer and sensor technologies to help drivers in certain situations. A prominent task of these systems is to detect obstacles (e.g. pedestrians, animals, or other vehicles) and to issue a warning to the driver or to take over control of the vehicle in certain cases. This is a complex process that requires data to be stored and retrieved rapidly and reliably. The M24C02-WBN6P is a suitable choice for such systems as its large memory capacity, low-power consumption, and fast read-write speed make it an ideal fit. Besides automotive systems, these EEPROMs can also be used in data logging applications. These are situations where it is required to collect and store data on a continuous basis with a high degree of precision. The M24C02-WBN6P is again a great choice for this purpose as the device has a wide operating temperature range and is durable. This makes it useful in harsh environments where its reliable performance allows data to be captured and stored accurately.

Working Principles

In order to illustrate working principles of the M24C02-WBN6P EEPROM, an overview of the write operation is provided below. When data are to be written, a write enable (WREN) command is first sent to the device. This command is 8-bit long and the Operational Code (opcode) for it is 11H. After the device has received this command and the write enable flag is set, data can be written to a specific address in the memory. This is done by providing the device with an opcode, a device address, and memory address of 16 bits each and the data word of 8 bits in length. After the data are written, the device sends out an acknowledge signal.The EEPROM also features a two-wire reset (TWST) command that enables the device to be reset without disconnecting it from the power supply. This is done by transmitting an opcode of a16 bits followed by five don’t cares. After this command is sent, the device resets all its registers back to their default condition and is ready for new operations. In order to read data from the memory, one must first perform the write enable command following which a read command (opcode 10H) needs to be sent. This command is followed by a device address of 16-bit length, a memory address of 16-bits, and a start bit. After this information is received, the device outputs the required data in the form of 8-bit words.

Conclusion

With its high memory capacity, low-power consumption, fast read-write speed, and wide temperature ranges, the M24C02-WBN6P is a very cost-effective choice for automotive and data logging applications. In addition to its robust performance, the device also offers a two-wire reset command that allows the user to reset it without having to disconnect it from the power supply. Thus, it is no surprise that the M24C02-WBN6P is a popular choice for a multitude of applications.

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