DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/ISL6296A
ISL6296A
FN6567
Rev.7.00
July 8, 2016
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 monetary-grade hash algorithm and
authentication schemes.
Features
The ISL6296A 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 ISL6296A 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 noncrystal based oscillator for bus timing
reference.
• FlexiHash engine uses two sets of 32-bit secrets for
authentication code generation
Communication with the host is achieved through a single-wire
XSD interface (a light-weight subset of Intersil’s 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.
• XSD single-wire host bus interface communicates with all
8250-compatible UARTs or a single GPIO. Supports CRC on
read data and transfer bit-rate 5.78kbps
A clone prevention solution utilizing the ISL6296A 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.
• 5 Ld SOT-23, 8 Ld TDFN and 8 Ld µTQFN packages
Related Literature
Applications
• AN1167, “Implementing XSD Host Using a GPIO”
• Battery pack authentication
• AN1166, “FlexiHash Engine Algorithm”
• Printer cartridges
• Challenge-response based authentication scheme using
32-bit challenge code and 8-bit authentication code
• Fast and flexible authentication process. Multipass
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
• Nonunique 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
• True “Zero Power” sleep mode - automatically entered after
a bus inactivity time-out period
• -25°C to +85°C operating temperature range
• Pb-free (RoHS compliant)
• Add-on accessories
• Other nonmonetary authentication applications
PACK+
XSD
R1
330Ω XSD
D1
5.1V
PACK-
ISL6296A
VDD
R2
4.7kΩ
PROTECTION
C1
0.1µF
VSS
FIGURE 1. TYPICAL APPLICATION WITH THE ISL6296A POWERED BY THE BATTERY
PACK+
R1
330Ω
XSD
D1
5.1V
PACK-
XSD
ISL6296A
VSS
VDD
PROTECTION
C1
0.1µF
FIGURE 2. TYPICAL APPLICATION WITH THE ISL6296A POWERED BY THE XSD BUS
FN6567 Rev.7.00
July 8, 2016
Page 1 of 2
ISL6296A
© Copyright Intersil Americas LLC 2007-2016. All Rights Reserved.
All trademarks and registered trademarks are the property of their respective owners.
For additional products, see www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice,
provided that such modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned
to verify that datasheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no
responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN6567 Rev.7.00
July 8, 2016
Page 2 of 2
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