General Description

The DS28E10 combines secure challenge-and-response authentication  functionality  based  on  the  FIPS  180-3 specified Secure Hash Algorithm (SHA-1) with 224 bits of  one-time  programmable  user  EPROM  in  a  single chip.  Once  written,  the  memory  is  automatically  write protected.  Additionally, each device has its own guaran teed unique 64-bit ROM identification number (ROM ID)

that is factory programmed into the chip. Memory writes

Features

Dedicated Hardware-Accelerated SHA-1 Engine for Generating SHA-1 MACs

One Page of 28 Bytes User OTP EPROM

Irreversible Write Protection

Unique, Factory-Programmed 64-Bit Identification Number

1-Wire Interface for Standard and Overdrive Speed

Communicates with Host at Up to 15.4kbps at Standard Speed or Up to 125kbps in Overdrive Mode

Operating Range from 2.8V to 3.6V, -40NC to +85NC

3-Lead SOT23, 6-Lead TSOC Package

±6kV Human Body Model (HBM) ESD Protection (typ) on 1-Wire and VCCPin