Rainbow Electronics AT88SA100S - Manual

Features
• Secure battery authentication
• Superior SHA-256 Hash Algorithm
• Best in class 256 bit key length
• Guaranteed Unique 48 bit Serial Number
• High speed single wire interface
• Supply Voltage: 2.5 – 5.5V
CryptoAuthentication ™
AT88SA100S
Battery Authentication
Chip
Preliminary
8558A–SMEM–03/09
• <100nA Sleep Current
• 4KV ESD protection
• Green compliant (exceeds RoHS) 3 pin SOT-23 package
Applications
• Cell Phones
• PDA and Smart Phones
• Portable Media Players
• Digital Cameras & Camcorders
• Cordless Tools
• Handheld Devices
1. Introduction
The AT88SA100S is a small authentication chip that can be used to
validate battery packs and other replaceable items that contain a
power source. It uses the industry leading SHA-256 hash algorithm
to provide the ultimate level of security.
An industry leading key length of 256 bits prevents exhaustive
attacks while multiple physical security features prevent
unauthorized disclosure of the secret key stored within the chip.
This key is automatically erased when power is removed from the
device.
It is shipped with a guaranteed unique 48 bit serial number that is
used in combination with an input challenge and the stored secret
key to generate a response that is unique for every individual
device.
The chip also includes 80 one-time fuses that can be used to
configure the system and/or retain permanent status. The values in
these fuses can also be locked to prevent modification.