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Secure supervisor adds memory, tamper-detection

Posted: 04 Jul 2008 ?? ?Print Version ?Bookmark and Share

Keywords:battery-backup controller? secure supervisor? tamper-detection circuitry?

DS3655

Maxim Integrated Products introduces the DS3655, a secure battery-backup controller and supervisor with temperature and voltage monitoring. This is the industry's only ultralow-power single-chip device to integrate a battery-backup controller, system power monitor, CPU supervisor, elapsed-time counter, temperature sensor, and tamper-detection comparator inputs. The high integration and advanced security features of the DS3655 make it suited for point-of-sale terminals, the payment card industry, software-defined radios (SDRs), and other equipment in which data protection and security is critical.

The DS3655 has tamper-detection comparator inputs that interface with and provide continuous, ultralow-power monitoring of resistive antitamper meshes, external sensors and digital interlocks. This secure supervisor constantly monitors primary power; in the event of failure, an external battery power source is automatically switched in to keep the device and external circuitry alive. The DS3655 also constantly monitors battery voltage and initiates a tamper response when the battery voltage becomes abnormal.

To facilitate recovery analysis, the elapsed-time seconds counter freezes the value of the free-running 32bit counter when a tamper event occurs. Moreover, the internal digital temperature sensor features user-programmable temperature thresholds and provides a tamper response in the event of thermal attacks.

Each device is inscribed with a unique, 64bit serial number to provide a distinct ID for tracing purposes. Fully specified over the -40C to 85C extended-industrial temperature range, the DS3655 is packaged in a Pb-free, 4mm x 4mm, 16-ball CSBGA for added security. Pricing information is available from the company.





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