The DS2460S+T&R is a SHA-1 coprocessor with EEPROM in 8 pin NSOIC package. The SHA-1 coprocessor with EEPROM is a hardware implementation of the ISO/IEC 10118-3 Secure Hash Algorithm (SHA-1), eliminating the need to develop software to perform the complex SHA computation required for authenticating SHA devices and for performing the validation of digitally signed service data. The DS2460 communicates with a microcontroller through the popular I2C interface. Applications include hosts of access control and electronic payment systems for token authentication and service data validation as well as generation of one-time-use encryption keys for short message encryption and decryption for messages not exceeding the length of a SHA-1 result which is 20bytes. Typical applications include license management, secure feature control, system authentication, clone prevention, door locks and utility meters.
● Supply voltage range is 2.7V to 5.5V
● Operating temperature range from -40°C to 85°C
● Dedicated hardware accelerated SHA engine for generating SHA-1 MACs
● 112bytes User EEPROM for storing end equipment property data
● I2C host interface, supports 100KHz and 400KHz communication speeds
● Three address inputs for I2C address assignment
● Single byte to 8byte EEPROM write sequences
● 64bit unique registration number
● EEPROM endurance of 200K cycles per 8byte block at 25°C
● 10ms max EEPROM write cycle and ±4KV IEC 1000-4-2 ESD protection level on all pins
