Based on breakthrough ESD technology, the XGD Series Xtreme-Guard ESD suppressor are available in 0402- and 0603-sized, flat-topped surface mount packages from Littelfuse.
They protect sensitive electronics against ESD as high as 30kV and are suitable for high voltage applications up to 32V DC. They can absorb repetitive ESD strikes nearly four times the maximum level specified in the IEC61000-4-2 international standard without performance degradation, claims the company. Extremely low capacitance makes them suitable for use in high-frequency and high-speed data, video, antenna and I/O circuits.
According to the company, even after multiple ESD strikes, it exhibits low current leakage (less than 1nA), ensuring minimal power losses, for battery-powered electronics, like wearables. Both sizes offer much higher voltage ratings than other ESD suppressors with similar board footprints, claims the company and they offer greater ESD protection than many TVS diodes while providing lower capacitance and leakage current and higher voltage ratings.
Wearable
LED die expands scope for wearable products
The colour choice of dotLEDs from Plessey Semiconductors has been expanded. The selection, includes red, green and blue for the die which has a footprint of 0.2 x 0.2mm, a suitable low profile for wearable devices, says the company.
Small package SPI FRAM suits power-critical wearable designs
An 8pin, WL-CSP has been added as an additional package variant for the MB85RS1MT, 1Mbit SPI FRAM from Fujitus.
According to the company, the package, measuring 3.09 x 2.28 x 0.33mm, reduces the surface area, compared with the industry standard SOP-8 package, reduces the surface mounting area by 77%, and the device height by 80%. It is, claims the company, a 1Mbit SPI FRAM product with the industry’s smallest packaging technology.
The WL-CSP package makes FRAM applicable for wearable and sensor designs, which require small device dimensions, extremely low power consumption for maximum battery lifetime, and high endurance in write cycles in case of real time logging.
Conventional non-volatile memories like EEPROM or Flash memory cover an endurance of one million write cycles, whereas the MB85RS1MT FRAM provides an endurance of 10 trillion read/write cycles, allowing flexible storage of real time logging data. Unlike the block access of EEPROM and Flash, FRAM can be overwritten fast and flexibly into each memory cell without any waiting time, points out the company. As a result, it consumes lower energy in the writing access, and contributes a great deal to extend the battery lifetime, especially for wearable / sensor applications with frequent logging functions.
The MB85RS1MT device operates in the voltage range of 1.8 to 3.6V and guarantees a data retention of 10 years at 85°C. The operation temperature ranges from -40°C to 85°C.
The device is being offered in SOP-8 and 8pin WL-CSP packages.
http://www.fujitsu.com/uk/
Round touch screens target wearable and industrial applications
Round TFT touch screens aimed at the growing market for wearable electronics, especially in the healthcare and fitness sectors, are now available from AndersDX.
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