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VAR-SOM-MX91
NXP i.MX91
An ideal solution for low-end and price-sensitive devices based on the NXP i.MX91 processor.
The VAR-SOM-MX91 System on Module runs on a 1.4GHz Cortex™-A55 NXP iMX91 processor and provides energy-flex architecture, built-in security along with industrial temperature grade and integrated connectivity options such as dual CAN-FD, dual GbE and certified dual-band Wi-Fi 802.11 ax/ac/a/b/g/n with optional 802.15.4 and BT/BLE 5.4.
The VAR-SOM-MX91 SoM is compatible with the VAR-SOM Pin2Pin family, providing maximum scalability and leading-edge capabilities; from entry-level i.MX6UL/6ULL platforms, through i.MX 8M NANO/MINI/PLUS, i.MX 93 and AM62x, up to i.MX 8X and 8QuadMax high-performance platforms.
For the complete Pin2Pin product list, check out Variscite’s Pin2Pin System on Module product families.
* The Pin2Pin compatibility depends on pinmux options; please verify the detailed pinout table in the related SoM to confirm compatibility is maintained in your specific design.
** Variscite's i.MX 91 System on Module (SoM) is in development at this stage. The information on this page is subject to change without notice. For additional information contact us.
Starting from
34
$
Highlights
CPU
Up to 1.4GHz Single Cortex-A55 NXP i.MX91
High Speed Interfaces
2x USB2.0, 2x GbE
Certified WiFi/BT
Wi-Fi 6 802.11 ax/ac/a/b/g/n with optional 802.15.4 and BT/BLE 5.4
Temperature range
-40 to 85°C
Security
Security subsystem with cryptographic accelerators
Product Longevity
2039
Support
Supporting you every step of the way - from ideation to launch and beyond.
Free and prompt support directly from Variscite’s R&D experts.
Quick Links
Specifications
CPU Name
NXP i.MX 91
CPU Type
Cortex™-A55
CPU Cores
1 core
CPU Clock (Max)
Up to 1.4GHz
Integer performance (DMIPS)
Up to 3,710
RAM
512MB – 2GB LPDDR4
eMMC
8 – 128 GB
Multimedia
Camera Interfaces
8bit Parallel
Display
Parallel RGB
1366x768p60 or 1280x800p60
Touch controller
Resistive, Capacitive
Audio
Headphone driver
Yes
Microphone
Digital, Analog (stereo)
Digital audio serial interface
3 x I2S(SAI),S/PDIF,RX TX, PDM 4CH
Line In/Out
Yes
SD / MMC
x2
USB Host / Device
USB2.0: 2x OTG
UART
x8, up to 5 Mbps
I2C
x7
I3C
x2
SPI
x7
CAN Bus
x2
RTC
On carrier
JTAG
x1
ADC
x4
Networking
Ethernet
2x 10/100/1000 Mbps
Wi-Fi
Certified Wi-Fi 6 dual-band 802.11ax/ac/a/b/g/n with optional 802.15.4, matter
Bluetooth
BT/BLE5.4
Linux
Yocto, Debian
Mechanical Specifications
Dimensions (W x L)
67.8 x 33mm
Electronic Specifications
Supply voltage
3.3V or 3.4-5V
Digital I/O voltage
3.3V/1.8V
Environmental Specifications
Commercial operating temperature
0 to 70°C
Extended operating temperature
-25 to 85°C
Industrial operating temperature
-40 to 85°C
Storage temperature
-40 to 85°C
Storage humidity
5% to 95%
VAR-SOM-MX91S_[xxxx]C_[xxxx]R_[xx]G_[AC]_[EC]_[TP]_[WBD/WBE]_[VBT]_[SDEX]_[X]T
MX91S:
Processor type:
i.MX 9131 single core fully featured
i.MX 9131 single core fully featured
[xxxx]C:
CPU clock speed: 1400MHz: 1400C
[xxxx]R:
LP-DDR4: 512 MB: 512R, 1536 MB: 1536R, 2048 MB: 2048R
[xx]G:
eMMC: 8 GB : 8G, 16 GB : 16G, 32 GB : 32G, 64 GB : 64G
[AC]:
Audio Codec
[EC]:
GbE PHY (second port always via RGMII)
[TP]:
Resistive touch panel controller (note: not available with WBE option)
[WBD/WBE]
WBD: Built-in certified single band Wi-Fi 802.11 ax/ac/a/b/g/n + BT/BLE 5.4
WBE: Built-in certified single band Wi-Fi 802.11 ax/ac/a/b/g/n + BT/BLE 5.4 + 802.15.4
WBE: Built-in certified single band Wi-Fi 802.11 ax/ac/a/b/g/n + BT/BLE 5.4 + 802.15.4
[VBT]
Default: Standard supply voltage
VBT: Higher battery supply voltage
VBT: Higher battery supply voltage
[SDEX]
Default: no additional external SDIO
SDEX: additional external SDIO (available only without WBD/WBE)
SDEX: additional external SDIO (available only without WBD/WBE)
[x]T:
C : 0 to 70°C, E: -25 to 85°C, I : -40 to 85°C
Note: All options in [brackets] are optional add-ons that can be either removed or selected from a list of options
Our long-standing partnerships
Our close partnerships with leading technology vendors provide our customers with early access to the latest advanced solutions, ensuring your projects begin with a solid and future-ready foundation.
Evaluation Kit
VAR-SOM-MX91 Evaluation Kits
Accessories
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Why Variscite?
Quality
In-house manufacturing with comprehensive quality control - certified to ISO9001 and ISO13485 medical standards.
Pin2Pin
Our Pin2Pin product families maximize scalability and enable seamless migration to future technologies without redesigning the carrier board.
Longevity
15-year guaranteed hardware availability, backed by continuous software updates and support.
Customizability
Configure your system with precision and flexibility - select only the features you need and reduce costs.
Updates
09.10.2024 Software releases
Stay current with software updates – Keep your Variscite SoMs performing at their best with our latest software releases.
23.02.2026
Newsroom
Variscite announces the DART-MX91, a versatile System on Module (SoM) designed for cost-sensitive edge computing applications. Starting at just $35, this compact module delivers essential performance and connectivity features while maintaining Variscite’s generous longevity commitment.
The DART-MX91 leverages NXP’s i.MX91 SoC architecture to provide an ideal solution for IoT, smart cities, connected sensors, portable devices, and industrial applications. Key specifications include:
The DART-MX91 leverages NXP’s i.MX91 SoC architecture to provide an ideal solution for IoT, smart cities, connected sensors, portable devices, and industrial applications. Key specifications include:
19.12.2024
Blog
This article provides step by step instructions on how to start developing your own Machine Learning (ML) applications using Variscite’s System on Modules. It shows how to build an image using the Yocto Linux BSP with a collection of development tools, utilities, and libraries for building ML applications from the NXP eIQ™ ML Software Development Environment, how to run the default examples built with the image, and finally, how to write a simple ML example from scratch.
1.1. eIQ™ Machine Learning Software Development Environment Overview
eIQ™ allows users to easily develop a complete system-level application to solve ML problems related to vision, audio, time-series data and so on. Common examples are face recognition, pose estimation, gesture recognition, speech accents interpretation, etc.
1.1. eIQ™ Machine Learning Software Development Environment Overview
eIQ™ allows users to easily develop a complete system-level application to solve ML problems related to vision, audio, time-series data and so on. Common examples are face recognition, pose estimation, gesture recognition, speech accents interpretation, etc.
12.08.2024
