New Industry Products

Intersil Announces New Battery Authentication ICs For Cell Phones

March 23, 2008 by Jeff Shepard

Intersil Corp. introduced what it describes as the most advanced and flexible battery authentication ICs for cell phones, featuring the company’s FlexiHash™ technology.

The new ISL9206 and ISL9206A are battery authentication ICs that incorporate Intersil’s FlexiHash+ engine. They are said to provide very high levels of security using a basic challenge/response scheme based on 32-bit challenge code and 8-bit response code. FlexiHash+ employs two sets of 32-bit secrets for generating authentication code to offer tens of billions of potential configurations for users. And with 16 x 8 one-time programmable (OTP) ROM, the devices can store a total of three sets of these 32-bit secrets.

Programmable memory adds the ability to store up to 48 bits of ID code and/or pack information. It is claimed that the result is fast, highly secure and flexible battery/device authentication that makes hacking prohibitively difficult due to the exhaustive key search that would be needed to break a code.

The ISL9206/06A each have an operating voltage range from 2.6 to 4.8V and can be powered directly from a one-cell li-Ion/li-Polymer or a three-cell series NiMH battery pack. The devices can also be powered by the XSD bus when the bus pull-up voltage is 3.3V or higher. They connect to the cell terminals of a battery pack and include an on-chip voltage regulation circuit, POR and a non-crystal based oscillator for bus timing reference.

Both new authentication ICs also include a clone prevention feature offering safety and revenue protection suitable for protection against after-market replacements. As an added feature, the ISL9206 incorporates multi-pass authentication that can be used to maximize security. Both devices are also suitable design choices for a wide variety of printer cartridges.

The ISL9206 and ISL9206A are available now in space-saving 5 Ld SOT-23 and 8 Ld TDFN packages and are priced at $1.40 and $1.73 each, respectively, in 1,000-unit quantities.