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SIM3U166-B-GM The Silicon Labs SIM3U166-B-GM is a 32-bit microcontroller featuring an ARM Cortex-M3 core operating at up to 80 MHz. It offers 256 kB of Flash memory and 32 kB of SRAM.
Mfr Part #:

SIM3U166-B-GM

Available from 3 distributors
Mfr Name: Silicon Labs
Silicon Labs
The Silicon Labs SIM3U166-B-GM is a 32-bit microcontroller featuring an ARM Cortex-M3 core operating at up to 80 MHz. It offers 256 kB of Flash memory and 32 kB of SRAM.
Total Stock: 5,938 pcs
$ Price Range: $6.40

SIM3U166-B-GM Available from 3 distributors

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
3,127 pcs
3127 pcs On Request 1 On Request On Request 1720+ On Request On Request
Non-Authorised Inventory information
2,451 pcs
2451 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
360 pcs
360 pcs On Request 1 On Request On Request On Request On Request 2026-02-23 21:33:16

SIM3U166-B-GM Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Connectivity
Core Processor
Core Size
Data Converters
Frequency
Mounting Type
Number of I
Number of I/O
Operating Temperature
Oscillator Type
Peripherals
Program Memory Size
Program Memory Type
RAM Size
Speed
Supplier Device Package
Supplier Package
Voltage

SIM3U166-B-GM Description

Short technical summary and product information.

The Silicon Labs SIM3U166-B-GM is a high-performance, low-power 32-bit microcontroller based on the ARM Cortex-M3 core, capable of operating at a maximum frequency of 80 MHz. This device is equipped with 256 kB of in-system programmable Flash memory and 32 kB of SRAM, making it suitable for a wide range of embedded applications.

 

Key features include 50 digital I/O pins, a comprehensive set of peripherals such as DMA, I²S, POR, PWM, and WDT, and multiple connectivity options including EBI/EMI, I²C, IrDA, SmartCard, SPI, UART/USART, and USB. It also includes 28 channels of 12-bit Analog-to-Digital converters and 2 channels of 10-bit Digital-to-Analog converters.

 

The SIM3U166-B-GM operates within a voltage range of 1.8V to 3.6V and has an operating temperature range of -40°C to 85°C. It is supplied in a 64-VFQFN exposed pad package, designed for surface mounting.

SIM3U166-B-GM Quick Information

Product Type: Microcontroller
Series: SIM3U1xx
Canonical Name: Silicon Labs SIM3U166-B-GM 32-Bit ARM Cortex-M3 Microcontroller
Subcategory: 32-bit

SIM3U166-B-GM Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

SIM3U166-B-GM Estimated Pricing

Qty Low High
1+ $6.40 $6.40

Estimated market price range - modelled values for guidance only, not live distributor offers.

SIM3U166-B-GM Features

  • 32-bit ARM Cortex-M3 core
  • 80 MHz maximum operating frequency
  • 256 kB Flash memory
  • 32 kB SRAM
  • 50 digital I/O pins

SIM3U166-B-GM Applications

  • Suitable for energy-sensitive applications
  • Ideal for embedded control systems
  • Supports various communication protocols
  • Features analog-to-digital conversion

SIM3U166-B-GM FAQs

7 frequently asked questions generated from this part’s specifications.
What is the core processor of the SIM3U166-B-GM?

The core processor is an ARM Cortex-M3.

What is the maximum operating frequency of this microcontroller?

The maximum operating frequency is 80 MHz.

How much Flash memory does the SIM3U166-B-GM have?

It has 256 kB of Flash memory.

What is the RAM size available on this device?

The RAM size is 32 kB.

What is the operating voltage range for the SIM3U166-B-GM?

The operating voltage range is 1.8V to 3.6V.

What are the available peripherals on this microcontroller?

Peripherals include Brown-out Detect/Reset, DMA, I²S, POR, PWM, and WDT.

What package type is the SIM3U166-B-GM supplied in?

It is supplied in a 64-VFQFN exposed pad package.

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