Add Memory to a product with a single electrical connection!
1-Wire serial memory products provide EEPROM and EPROM memory arrays that are both powered and operated over the single-contact 1-Wire interface. The 1-Wire interface provides advantages over other industry interfaces such as I²C or SPI™ in applications where contacts between the host controller and memory device are limited or must be minimized, and/or where factory-programmed unique device serialization is required or valuable. 1-Wire devices require a total of two contacts for total device operation, compared to four contacts for I²C memory or five contacts for SPI memory.
With unique 64-bit device serial numbers and network-capable command protocol, 1-Wire memory devices can be multidropped on a common 1-Wire line and operated independently. 1-Wire memory security features vary from SW-programmable write protection to low-cost, cryptographically secure, bidirectional, authentication which is implemented with the industry-standard secure hash algorithm (SHA-1). With only a single contact and ground return, the 1-Wire interface can easily be implemented from a spare controller port pin. This means that the costs to implement a 1-Wire system are minimal.
