FlexiHash™ For Battery Authentication

The ISL6296A is a highly cost-effective fixed-secret hash engine based on Intersil’s FlexiHash technology. The device’s authentication is achieved through a challenge response scheme, which is customized for low-cost applications where cloning via eavesdropping without knowledge of the device’s secret code is not economically viable. When used for its intended applications, the ISL6296A offers the same level of effectiveness as other significantly more expensive high maintenance monetarygrade hash algorithm and authentication schemes.

Features

• Challenge-response based authentication scheme using

32-Bit challenge code and 8-Bit authentication code.

• Fast and flexible authentication process. Multi-pass

authentication can be used to achieve the highest security

level if necessary.

• 16x8 OTP ROM stores up to three sets of 32-Bit host

selectable secrets with additional programmable memory

for storage of up to 48-bits of ID code and/or pack

information.

• FlexiHash engine uses two sets of 32-Bit secrets for

authentication code generation.

• Non-unique mapping of the secret key to an 8-Bit

authentication code maximizes hacking difficulty due to

need for exhaustive key search (superior to SHA-1).

• Supports 1-cell Li-ion/Li-Poly and 3-cell series NiMH

battery packs (2.6V ~ 4.8V operation), or powered by the

XSD bus.

• XSD single-wire host bus interface communicates with all

8250-compatible UART’s or a single GPIO. Supports CRC

on read data and transfer bit-rate up to 23kbps.

• True “Zero Power” Sleep mode - automatically entered

after a bus inactivity time-out period.

• 5 Ld SOT-23 and 8 Ld TDFN (2mmx3mm) packages

• -25°C to +85°C operating temperature range

• Pb-free (RoHS compliant)

Applications

• Battery Pack Authentication

• Printer Cartridges

• Add-on Accessories

• Other Non-Monetary Authentication Applications