Abstract
This application note goes over the basics of using 1-Wire devices to create electro-mechanical contact solutions. It then provides example use cases and an example assembled module.
Introduction
Adding electronic functionality to traditional nonelectronic peripherals and consumables is a common application requirement. This is typically driven by system requirements, including storage of calibration data, manufacturing information, or original equipment manufacturer (OEM) authentication of the peripheral, accessory, or consumable. In addition to selecting the proper IC feature set to provide security and memory for these applications, a reliable and cost-effective solution is needed to attach the IC to the peripheral and make an electro-mechanical connection between the peripheral and host system.
For standard flat surfaces Maxim offers a patented 1-Wire® Contact Package solution, also referred to as an SFN package. Maxim currently offers three different size options for this package, providing a cost-effective method for attachment of a 1-Wire IC to the nonelectronic peripheral combined with a reliable electro-mechanical contact surface.
Beyond the SFN Package
For applications that require attachment to flexible surfaces, contoured surfaces, or simply larger connecting contacts, Maxim's 1-Wire ICs can be utilized in an IC plus flexible printed circuit board (PCB) module solution. The reduced pin count of the 1-Wire interface simplifies the number of contacts of a module solution to just two contact pads for IO and GND. With the addition of an adhesive back, these flexible modules can then be easily applied to most surfaces.
Real-World Example
Choosing a Flex PCB Supplier
Customers who need assistance in finding a PCB supplier for these type of module builds can contact ADI and request more information.
Product | Interface | Memory Size | Security |
DS28E38 | 1-Wire | 2Kb | ECDSA-P256 authentication |
DS28E50 | 1-Wire | 4Kb | SHA3-256 authentication |
DS28E16 | 1-Wire | 256 bits | SHA3-256 authentication |
DS24B33 | 1-Wire | 4Kb | Secure serial number |
DS2431 | 1-Wire | 1Kb | Secure serial number |
DS28E05 | 1-Wire | 896 bits | Secure serial number |