ATSHA204
Atmel CryptoAuthentication
NOT RECOMMENDED
DATASHEET
FOR NEW DESIGNS
Replaced by
Features
ATSHA204A
Secure authentication and validation device
Integrated capability for both Host and Client operations
Superior SHA-256 Hash algorithm with Message Authentication Code (MAC) and
Hash-Based Message Authentication Code (HMAC) options
Best-in-class, 256-bit key length; storage for up to 16 keys
Guaranteed unique 72-bit serial number
Internal, high-quality Random Number Generator (RNG)
4.5Kb EEPROM for keys and data
512 OTP (One Time Programmable) bits for fixed information
Multiple I/O options
High-Speed, Single-Wire Interface
2
1MHz I C interface
2.0V to 5.5V supply voltage range
1.8V to 5.5V communications
<150nA sleep current
Extended, multi-level hardware security
8-lead SOIC, 8-lead TSSOP, 3-lead SOT23, 8-pad UDFN, and 3-lead Contact
packages
Applications
Anti-clone protection for accessories, daughter cards, and consumables
Secure boot validation, software anti-piracy
Network and computer access control
Key exchange for encrypted downloads
Authenticated/encrypted communications for control networks
Atmel-8740H-CryptoAuth-ATSHA204-Datasheet_072014Table 1. Pin Configurations
Pin Name Function
NC No Connect
GND Ground
SDA Serial Data
SCL Serial Clock Input
V
Power Supply
CC
Figure 1. Pinouts
8-lead SOIC 8-lead TSSOP
NC 1 8 V NC 1 8 V
CC
CC
NC 2 7 NC NC 2 7 NC
NC 3 6 SCL NC 3 6 SCL
GND 4 5 SDA GND 4 5 SDA
Top View Top View
8-pad UDFN
3-lead SOT23
8 1
V NC
CC
2 V
CC
NC 7 2 NC
GND 3 SCL 6 3 NC
5 4
SDA GND
1 SDA
Bottom View
Top View
3-lead Contact
1 SDA
2 GND
3 V
CC
Bottom View
2 ATSHA204 [DATASHEET]
Atmel-8740H-CryptoAuth-ATSHA204-Datasheet_072014