SIM3U146-B-GM Silicon Labs, SIM3U146-B-GM Datasheet - Page 5

• Manufacturer Part Number: SIM3U146-B-GM
• Description: ARM Microcontrollers - MCU ARM Cortex-M3 USB 64KB QFN64
• Manufacturer: Silicon Labs

Specifications of SIM3U146-B-GM

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: SIM3U1xx
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 80 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 32 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.8 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: QFN-64
• Mounting Style: SMD/SMT
• Interface Type: 2 x I2C, I2S, 3 x SPI, 2 x USART, 2 x UART
• Number Of Programmable I/os: 65
• Number Of Timers: 2 x 32 bit
• Supply Voltage - Max: 3.6 V

2. Typical Connection Diagrams
This section provides typical connection diagrams for SiM3U1xx devices.
2.1. Power
Figure 2.1 shows a typical connection diagram for the power pins of the SiM3U1xx devices when the internal
regulator is in use and USB is not used.
Figure 2.2 shows a typical connection diagram for the power pins of the SiM3U1xx devices when the internal
regulator and USB are not used.
Figure 2.3 shows a typical connection diagram for the power pins of the SiM3U1xx devices when the internal
regulator used and USB is connected (bus-powered).
1 uF and 0.1 uF bypass
each power pin placed
capacitors required for
as close to the pins as
possible.
1 uF and 0.1 uF bypass
Figure 2.2. Connection Diagram with Voltage Regulator Not Used and No USB
each power pin placed
capacitors required for
as close to the pins as
Figure 2.1. Connection Diagram with Voltage Regulator Used and No USB
possible.
5 V (in)
1.8-3.6 V (in)
3.3 V (out)
Rev. 1.0
VREGIN
VSSHD
VIOHD
VBUS
VDD
VSS
VREGIN
VIO
VSSHD
VIOHD
VBUS
VDD
VSS
VIO
SiM3U1xx Device
SiM3U1xx Device
VREGn
VREGn
SiM3U1xx
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