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Security manager offers patented non-imprinting memory

Posted: 29 Apr 2011 ?? ?Print Version ?Bookmark and Share

Keywords:security manager? on-chip nonimprinting memory? low-voltage external SRAM?

Maxim Integrated Products has launched a security manager designed for applications requiring the highest levels of security.

The DS3660 uses 1024B of non-imprinting memory to store sensitive data and to provide the physical tamper-sensing response functions required in cryptographic processors and data security equipment.

The on-chip non-imprinting memory, which consists of eight 128B banks, can be selectively cleared by end-users based on user-specified tamper events. The 1KB memory is constantly complemented in the background to prevent memory imprinting of data.

Additionally, the device features an internal 1.8V bias source to power low-voltage external SRAM that can be used to store less-critical data, and is configurable to operate with a low-voltage microprocessor for battery-operated devices, the company explained.

Combining internal tamper monitors with tamper-detection inputs that interface with external sensors, the company said the device offers the highest levels of system security.

The DS3660 provides tamper detection regardless of the power source, making it suitable for ultra-secure applications such as government and military systems, as well as any application where more than one tamper-trigger needs to be monitored.

The device's on-chip battery-backup controller constantly monitors the main power (VCC) and automatically switches to the battery (VBAT) when the main power is too low or not present at all. It draws only 4microamps (typ) of battery current but can retain critical information and still monitor tamper occurrences while on battery power.

The device is not temperature-sensitive and can be used between -55C to +95C. It is available in a 7mm x 7mm, lead-free, 49-ball CSBGA package.

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