AT88SA100S

Atmel AT88SA100S Atmel CryptoAuthentication Battery Authentication Chip DATASHEET Not Recommended for New Designs Replaced by ATSHA204 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: 2.7V – 5.25 V <150nA sleep current Green compliant (exceeds RoHS) 3-pin SOT-23 or 8-lead SOIC packages Applications Cell phones PDA and smart phones Portable media players Digital cameras & camcorders Cordless tools Handheld devices Figure 1. Pin Configurations Pin name SIGNAL GND VCC Function Serial data, single-wire clock, and data Ground Power supply 8-lead SOIC 3-lead SOT-23 NC 1 NC 2 NC 3 GND 4 8 VCC 2 VCC 7 NC 6 NC GND 3 5 SIGNAL 1 SIGNAL 8558G−CRYPTO−9/2012 1. Introduction The Atmel® 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 AT88SA100S. It is shipped with a guaranteed unique 48-bit serial number that is used in combination with an input challenge and the stored secr...