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Non-volatile SRAM controller has tamper detection

Posted: 04 Oct 2007 ?? ?Print Version ?Bookmark and Share

Keywords:none-volatile SRAM? memory controller? tamper detection?

Maxim Integrated Products has introduced the DS3605, an I?C-compatible, secure, non-volatile (NV) SRAM controller with tamper detection. Designed for applications in which the security of encryption keys is critical, this NV SRAM controller allows users to specify their own external SRAM. When a tamper event occurs, the DS3605 quickly erases the encryption keys on this external SRAM.

To further enhance security, the new device integrates a real-time clock, battery-backup controller, system power monitor, CPU supervisor, temperature sensor and four uncommitted tamper-detection comparator inputs. The high integration and advanced security features of the DS3605 make it suitable for secure-transaction terminals and other security-sensitive applications.

The DS3605 provides four uncommitted tamper-detection comparator inputs to interface with a variety of tamper-detection mechanisms, such as antitamper meshes, external case switches and digital interlocks.

In the event of a primary power failure, the DS3605 immediately switches over to an external battery power source to keep the tamper circuitry alive. This device also continuously monitors the substrate temperature and crystal oscillator. If the substrate temperature exceeds the factory-preset levels or changes, the DS3605 initiates a tamper event. Once a tamper event is registered, it is then time stamped and stored for analysis.

Packaged in a Pb-free, 5mm x 5mm, 25-ball CSBGA for added security, the DS3605 is fully specified over the -40C to 85C extended temperature range. For tracing purposes, each device is inscribed with a unique, 64bit serial number. Due to the secure nature of this product, please contact the factory for the data sheet, samples and pricing.

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