DS28CZ04G-4+T

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Today’s high-tech industry requires memory with highly reliable features and increased data security. The need for a wide variety of data protection and authentication mechanisms, together with cost and power saving features, drives development for the advancement of security-enabling memory devices.

The Dallas Semiconductor (Maxim) DS28CZ04G-4+T is a secure memory device with a total of 4K bits of storage, offering an integrated serialized 1-Wire interface and an on-chip temperature-sensing diode.

Application Field of DS28CZ04G-4+T

The DS28CZ04G-4+T secure memory is ideal for applications that require the highest level of security, such as smartphones and IOT devices. Additionally, it can be used in systems with up to 4K bits Code Protection, Banking, Government ID, or Medical Record Access, E-Ticketing/E-Passports.

The device is also extremely well-suited for medical and automotive applications, where the need for secure encryption is paramount. Examples include, remote medical device management and conformance logging. The device is also suited for RFID tag applications, biometrics, and data logging with high accuracy temperature sensing over a range of -40˚C to +85˚C.

Working Principle of DS28CZ04G-4+T

The DS28CZ04G-4+T device includes a secure memory block with 4K bits of unprotected memory and 128 bits of protected memory that is intended for sensitive and secure data. The device also includes scratchpad memory, and it is equipped with a fast write capability that enables the device to transfer data into and out of the protected memory in just a few microseconds. Furthermore, the device is capable of providing an authentication challenge/response mechanism.

The device implements a cryptographic coprocessor that enables it to secure data using standard encryption algorithms such as AES-128, hashes, and digital signatures. A write key protects the protected memory space, and it can only be unlocked when a valid write key is presented. Once the write key is unlocked, the user can write to the protected memory area.

The device also includes an on-chip temperature-sensing diode that allows the device to measure temperature precisely over a range of –40˚C to +85˚C, a feature which can be used in automotive and medical applications. The device also includes a unique serial number, and it supports communication at data rates of up to 16 Mbps, making it ideal for high-bandwidth, low-power applications.

The integrated serialized 1-Wire interface and an on-chip temperature-sensing diode provide an additional level of security for data transmission. The 1-wire bus contains an 8-bit CRC checksum and can detect any communication errors between the chip and the host or peripherals.

In summary, the DS28CZ04G-4+T is a secure memory device designed for applications that require the highest level of security and precise temperature sensing. The device is equipped with AES-128 encryption and write-protection security, fast write capability and a serialized 1-wire bus. Furthermore, the integrated temperature-sensing diode and unique serial number make it ideal for automotive, medical, and RFID applications.

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