ISL9206

Description

The ISL9206 is a highly cost-effective fixed-secret hash engine based on Intersils second generation FlexiHash technology. The device authentication is achieved through a challenge-response scheme customized for low-cost applications, where cloning via eavesdropping without knowledge of the devices secret code is not economically viable. When used for its intended applications, the ISL9206 offers the same level of effectiveness as other significantly more expensive high-maintenance hash algorithm and authentication schemes. The ISL9206 has a wide operating voltage range, and is suitable for direct powering from a 1-cell Li-Ion/Li-Poly or a 3-cell series NiMH battery pack. The ISL9206 can also be powered by the XSD bus when the bus pull-up voltage is 3.3V or higher. The device connects directly to the cell terminals of a battery pack, and includes on-chip voltage regulation circuit, POR, and a non-crystal based oscillator for bus timing reference. Communication with the host is achieved through a singlewire XSD interface - a light-weight subset of Intersils ISD bus interface. The XSD bus is compatible for use with serial ports offered by all 8250 compatible UARTs or a single GPIO (general purpose input and output) pin of a microprocessor. A clone prevention solution utilizing the ISL9206 offers safety and revenue protection at the lowest cost and power, and is suitable for protection against after-market replacement for a wide variety of low-cost applications.