Single Chip LTE Cat M1/NB1 SoC with
embedded processor for the Internet of Things

Monarch SX is a highly-integrated single-chip LTE-M (Cat M1) and NB-IoT (Cat NB1) system-on-chip (SoC) with an embedded processor designed specifically for small form-factor, narrowband IoT applications, including trackers, sensors, wearables, and other low data-use, low power M2M and IoT devices. Monarch SX integrates Sequans’ Monarch, the world’s first and most highly optimized LTE-M and NB-IoT platform, and first to be certified by a tier-one operator, with an ARM® Cortex®-M4 processor, voice and audio engines with support for VoLTE on LTE-M, an always-on, ultra-low power sensor hub, and an advanced display controller to support a graphical user interface with touch screen functions. The Monarch SX modem complies with the ultra-low-power and reduced complexity feature requirements of the 3GPP release 13 LTE Advanced Pro standard, defining narrowband, low data rate LTE technology for machine-type-communications (MTC). Monarch SX achieves a very high level of integration whereby the ARM Cortex-M4 processor, dedicated media processing unit, sensor hub, baseband processor, RF transceiver, power management unit, and RAM are integrated into a tiny package, meeting the footprint requirements for the very smallest of IoT devices. Monarch SX runs Sequans’ SDK with a carrier-proven LTE protocol stack, an OMA lightweight M2M (LWM2M) client for over-the-air device management, a media engine, a sensor hub engine, and a royalty free RTOS.


Monarch SX is ideal for adding LTE Cat M1 and/or LTE Cat NB1 connectivity to narrowband, low data rate M2M and IoT devices, including asset trackers, wearables, smart utility meters, smart city and smart home sensors and a wide variety of additional industrial and consumer IoT applications.


  • Integrated LTE-M/NB-IoT baseband and RF transceiver, ARM Cortex-M4 processor, media processing unit, sensor hub, GPU and display controller , RAM and power management
  • IoT interfaces for USB, screen, audio microphone, battery, GNSS, SIM card, secure element, Wi-Fi, Bluetooth low energy, keyboard, accelerometer, gyroscope, and other sensors
  • 3GPP Release 13 LTE Advanced Pro
  • Narrowband LTE UE categories M1 and NB1
  • Single chip FC-CSP package
  • Extended DRX and PSM features for ultra-low power consumption in long sleep modes
  • Programmable RF filtering for global multi-band support in a single-SKU hardware design
  • Proprietary Dynamic Power Management (DPM) technology for 10+ year operation
  • Single antenna system architecture
  • Coverage enhancement methods
  • Reduced Tx power class option
  • Optimized for half-duplex FDD (HD-FDD), and also supports full-duplex FDD (FD-FDD)
    – Throughput: LTE UE category M1 (1.4 MHz bandwidth) up to 300 kbps DL/375 kbps UL in HD-FDD, and 1 Mbps in FD-FDD
    – LTE UE category NB1 (200 kHz bandwidth) up to 40 kbps DL/55 kbps UL in

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