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Home > News > Industry News > Rohm has dual-standard wide-ar.....

Rohm has dual-standard wide-area radio chip for IoT

  • Author:Ella Cai
  • Release on:2017-09-06
A smart meter wireless comms device that supports both Sigfox and IEEE802.15.4k radio standards has been introduced by Lapis Semiconductor, part of the Rohm Group.

Designated the ML7404, the chip will be supplied with the protocol stack for IEEE802.15.4k as open-source from partner stack vendors.

Hardware BPSK modulation reduces load on the host microcontroller.

The Sigfox standard is a subscription-based low power wide-area wireless protocol which has been adopted in more than 30 countries and expanding in metropolitan areas including Japan.

The international protocol IEEE802.15.4K that is designed to be particularly robust against interference from the same system. It is the basis for the ZigBee and Thread specifications.

Rohm Lapis ML7404The 802.15.4k standard is characterised by DSSS based on orthogonal spreading codes and features high interference tolerance from the same system compared with other spread spectrum communication methods.

It can also accommodate more terminals under the same network. This protocol utilises the high reliability sub-GHz band that does not require a license.

Wide area networks using the sub-GHz band, which is not subject to RF licensing, is attracting attention for IoT applications.

Rohm will present the smart metering device at European Utility Week (EUW) in Amsterdam at the beginning of October.