PRODUCTS EDITOR’S CHOICE MICROCHIP’S ATTINY1617 SERIES OF AVR MCUS, NOW AT MOUSER


The ATtiny1617 microcontroller series from Microchip Technology can now be found at Mouser. These devices offer pin and code compatibility with the ATtiny817 series devices while extending the


flash memory. The compact 8-bit devices run at up to 20MHz, and provide a customised configuration and simplified process for capacitive touch systems and Core Independent Peripherals (CIPs) that help increase system throughput while lowering overall power consumption. These 8-bit AVR microcontrollers feature 16 kBytes of in-system self- programmable flash memory, 256 Bytes of EEPROM, and 2 kBytes of SRAM. They use the 8-bit AVR processor with hardware multiplier and provide an event system controller that allows peripherals to communicate without using the central processing unit (CPU). This functionality enables customisation of the configuration of the


microcontrollers to specific applications. Also included on-chip is an integrated QTouch Peripheral Touch Controller (PTC) that helps to simplify the development of capacitive touch systems offering touch interfaces with proximity sensing and a driven shield. Other integrated features include


a 20MHz internal oscillator; high- speed serial communication interfaces that include a USART, SPI and I2


C; configurable custom logic


blocks; a 10-bit analogue-to-digital converter (ADC) with internal voltage references; operating voltages ranging from 1.8V to 5.5V; and picoPower technology for sleep currents as low as 100nA. www.mouser.com


MICRO-MINIATURE CONNECTOR


A new range of micro-miniature industrial connectors manufactured by Norcomp are now available from RS Components (RS), which are an alternative instead of military- and aerospace-rated micro-D connectors. The 380/381/382/960 series of Micro-D connectors and cable assemblies has been designed for commercial markets including robotics, telecommunications and instrumentation equipment, and other applications. This series is available in three sizes – 9, 15


SIGFOX CONNECTIVITY ADDED TO LORAWAN MODULE OFFERS GREATER FLEXIBILITY


The results of a collaboration between Murata, STMicro and SigFox to port the SigFox stack to co-exist alongside the LoRa stack on Murata’s Type ABZ LoRaWAN module have been released. This means that the module’s capability for providing both LoRa and SigFox capabilities worldwide from a single hardware platform is now possible. This gives flexibility to choose which network technology serves the application best depending on location, service requirements and cost. Both networks offer similar low-power wide area network (LPWAN) capabilities, targeting applications in


smart meters, facility management, asset tracking, and a range of other uses in the IoT space. While each has differences, the common goal is network coverage with good quality of service. By supporting both standards, Murata’s module can also bridge both networks, providing even greater deployment flexibility by allowing a dual-mode operation from a single firmware package that can be used globally. With this capability, in the event of a network problem on one network, customer applications would be


able to easily switch to the other protocol, thus offering redundancy of communications links. Currently, Murata’s Type ABZ LoRaWan module, which uses an STMicro STM32-based wireless


microcontroller and SX1276 Semtech RFIC, operates in the 806‑930MHz frequency band and provides a nominal output power of 14dBm that can be boosted to 20dBm for long range or poor signal location applications. STMicro is a key partner for Murata, and STMicro is responsible for the development of the SigFox firmware. SigFox European certification of the module has been completed and certification for the US will take place during October and Asia-Pacific regions will follow in November. A European version will be made available by STMicro through its website at the end of July. By combining these two technologies, the four companies have produced a module suitable for the many


different kinds of applications that the industry wish to use it for. http://wireless.murata.com/eng/products.html


and 25-way – as well as in vertical and right angle board-mount and cable-mount options. Offering a contact spacing of just 1.27mm (0.050-inch), the connectors are less than a third of the size of standard D- sub connector types, yet deliver a metal-to- metal interface that provides robust mechanical connection and shielding. www.rs-online.com


Specifically designed for the growing number of autonomous IoT systems, the new Omron 2JCIE-BL01 Sensor measures temperature, humidity, light, UVI, barometric pressure, noise and acceleration. Despite its compact size, the 2JCIE features its own embedded memory for data logging to keep track of the surroundings. Potential applications include monitoring and controlling both industrial and office environments to improve the work space. It is also suitable for home and outdoor applications.


https://omron.co.uk


LITHIUM-ION BATTERY BACKUP MANAGEMENT SYSTEM FOR HIGH EFFICIENCY CHARGING


complete lithium-ion battery backup management system for 3.45V to 4.45V supply rails that must be kept active during a long duration main power failure. The LTC4091 employs a 36V monolithic buck converter with adaptive output control to provide power to a system load and enable high efficiency battery charging from the buck output. When external power is available, the device can provide up to 2.5A of total output current and up to 1.5A of charge current for single-cell 4.1V or 4.2V Li-


Analog Devices, Inc., which recently acquired Linear Technology Corporation, has introduced a


6 JULY/AUGUST 2017 | ELECTRONICS


Ion batteries. If the primary input source fails and can no longer power the load, this device


provides up to 4A to the system output load from the backup Li-Ion battery via an internal ideal diode, and unlimited current if an external ideal diode transistor is used. To protect sensitive downstream loads, the maximum output load voltage is 4.45V. The device’s PowerPath control provides a simple switchover between input power and backup power during a power fail event, and enables reverse blocking with a shorted input. Typical applications for this solution include fleet and asset tracking, automotive GPS data loggers and telematics systems, security systems, communications and industrial backup systems. www.linear.com/product/LTC4091


/ ELECTRONICS


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