M95256-WMW6G

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Memory Type:	Non-Volatile
Memory Format:	EEPROM
Technology:	EEPROM
Memory Size:	256Kb (32K x 8)
Clock Frequency:	10MHz
Write Cycle Time - Word, Page:	5ms
Memory Interface:	SPI
Voltage - Supply:	2.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	8-SO
Base Part Number:	M95256

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M95256-WMW6G application field and working principle.

Introduction

The M95256-WMW6G is a 1Megabit Serial EEPROM secured memory device designed specifically to provide enhanced security features. This memory device is applicable in a wide range of embedded applications such as automotive, home appliances, consumer electronics, as well as security and access control products. The M95256-WMW6G accommodates four distinct levels of data security for protecting proprietary algorithms, configuration, and other sensitive information that must be securely stored. The protection and authentication methods offered include 128-bit 3DES encryption, address space mapping, user-defined password protection, and two-wire or four-wire device-level variations.

Basic features

The M95256-WMW6G offers minimum 4KBytes of memory, which is organized in 32 Bytes pages. The programming cycle time is 5ms and the read access time is 5us. It consumes 2.5 mA while active and 8 micro-amperes under standby. The device operates on a supply voltage range of 3.0V to 5.5V. This set of features makes this device an ideal component for embedded applications, where fast operation and low power consumption are necessary.

Application Field

Due to its enhanced security features, the M95256-WMW6G can be used in a wide array of applications such as automotive, home appliances, consumer electronics, security, access control, and data logging. For example, the device can be used in automotive applications for storing engine codes and navigation system configurations. In home appliances, the device can be used to store energy levels and settings related to heating and cooling systems. In consumer electronics, it can be used as a replacement to physically wired switches. Furthermore, it can be used in security and access control products, such as consumer safes, locks, and bank cards.

Working Principle

The M95256-WMW6G operates by encryption. Encryption is a process of transforming plaintext into its encrypted version, making it unreadable and secure. This is done by means of cryptographic algorithms. The M95256-WMW6G uses 128-bit 3DES encryption. It utilizes a three phase process: encryption, transmission, and decryption. It also uses a secret key-based encryption technique, which is known only to the sender and the receiver of a communication. This type of encryption is used to securely store and protect data, as well as to keep proprietary algorithms and other valuable information safe. In order to do that, the device has a debug port, which restricts access to the data stored in the device. This port can also be used for authentication, making sure that only authorized users can access the memory. The M95256-WMW6G also offers address space mapping, which limits access to memory locations. This means that only certain locations can be accessed and that data stored in specific locations can be protected. In order to access the address-mapped locations, it is necessary to enter a valid password. If the password is correct, then access is granted to the particular memory locations. If not, the device will deny the access. The user-defined password enables the user to determine how the data stored on the device is accessed. The two-wire or four-wire device-level variation of the M95256-WMW6G also offers enhanced security features. In two-wire variation, there are two communication wires between the device and the host. This variation is used when communication and memory access require a minimum amount of lines. On the other hand, four-wire variation uses an additional two wires for programming, which makes it more secure.

Conclusion

In conclusion, the M95256-WMW6G is a secure memory device that is suitable for a variety of embedded applications. This device is great for storing algorithms, configuration data, and other sensitive information. It is also great for protecting data from unauthorized access due to its encryption, address space mapping, user-defined password protection and two-wire or four-wire device-level variations. The M95256-WMW6G is the perfect choice for applications that require enhanced security features, such as automotive, home appliances, consumer electronics, as well as security and access control products.

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