Plug connector
Integrated microchips
Whether medical devices, product tracking, vehicle systems or 5G communication - the demands on safety, performance, documentation and user-friendliness are increasing. What is the significance of microchips integrated into connectors or cable assemblies?
Using connector systems with integrated microchips such as EEPROMs - i.e. electrically erasable and programmable read-only memories - devices and connectors can be easily coupled and electronic devices can be recognized and configured. This applies equally to the recognition of accessories and printed circuit boards or for the calibration of sensors and data storage. The small 'memory giants' can also be used to call up the connection status in real time and count the number of mating cycles. Last but not least, they can be used in a wide range of applications that require electronic safety checks before the connection is made.
But what is the technology behind connectors with integrated EEPROMs?
Communicative and safe casting
Example of a connector with integrated EEPROMs. The connectors are represented by black boxes, the EEPROMs by blue boxes.
© ODUThe solutions with cable assemblies have ID and memory, which can be used to implement various applications in addition to the identification function. For this purpose, a single microchip is securely encapsulated and sealed inside the connector housing. Communication is established in both directions via an additional pin in the connector.
The microchip is supplied with power via the signal conductor. The bus protocols for communication with the microchips are similar to the I²C protocol, but with lower data rates and only one shared data/power line. The ID is provided by a special 64-bit ROM that is permanently lasered onto the microchip. In addition, 1 to 4 kbit of the memory can be used to store device-specific data. Security functions such as write protection or an EEPROM emulation mode are also available. The bus protocol also allows several connectors/devices to be addressed on the same bus.
The central control unit of the application - a microcontroller, an industrial PC, an industrial controller or similar - addresses the connector via a standard digital I/O line. The read/write voltage is between 2.8 and 5.25 V. Standard libraries can be easily integrated into the existing software.
The internal memory opens up additional options: It can be used to record device, operating, calibration, product and production data as well as reports on device operation or information on the configuration of the overall system.

Board member Uwe Gräff steps down
Uwe Gräff, Director of New Technologies and Development at Harting, left the company by mutual agreement at the end of September. He had only been appointed to the Management Board at the beginning of 2019.
Application scenarios
There is growing interest in such solutions, particularly in the medical technology, military and security markets, as well as in the measurement and testing technology market segment. They provide system developers with a simple serialization method to save space, time and costs by simply physically marking connectors or cable assemblies.
Advances in high-tech treatment methods and surgical standards, for example, present medical technology developers with specific challenges. On the one hand, the performance of the devices must be constantly improved to ensure maximum product reliability throughout the entire life cycle, while on the other hand, new legal and safety requirements as well as the obligation to manage risk and documentation must also be taken into account. Care is therefore taken during the development phase to ensure that the configuration is correctly aligned, the operating limits are safe, maintenance and component replacement are precisely timed and the products are disposed of on time.
As memory performance and detection functions are already available at component level for sensors, cables or mobile hand-held devices, the connectors with integrated memory offer a significant increase in safety. For example, the use of expired or ineffective products, misconfigurations or operational use outside specific device limits are prevented. Fully automated documentation is integrated.
In the field of military and security technology, the error-free flow of information at all times can also save lives in extreme cases. This also includes vehicles. In this area, connectors with integrated microchips help to quickly and independently identify any connected component as well as non-approved devices, configure a system and compare maintenance intervals and service life according to corresponding specifications.
Measuring and testing technology
A third important market segment for intelligent connector systems is the field of measurement and testing technology. Guaranteed reliable function and precision in the transmission of measurement data at all times are core requirements for the devices used. Examples can be found in the field of URLLC technology in the 5G mobile network and in the evaluation of so-called tracking data in real time for tracking products and monitoring precisely defined work processes. Added to this is the testing of composite components in the field of electromobility, where reliability and flawless functionality are required. The use of connectors with integrated EEPROMs enables more precise measurements of increasingly complex test specifications with higher accuracy, improved documentation and correct test configuration compared to classic electrical measurement technology.
Author:
Rudolf Weidenspointner is product manager for cable assembly at ODU in Mühldorf.












