UG298: Si5xxUC-EVB
Universal Oscillator Evaluation Board
This document describes operation of the Silicon Laboratories Si5xxUC-EVB evaluation
board designed to evaluate any of Silicon Labs’ pin-controlled or I2C configurable Si5xx
XOs or VCXOs. Three device sites are available to support one of either 5mm x 7mm,
3.2mm x 5mm, or 2.5mm x 3.2mm devices in either 4, 6, or 8 pin configurations. Selec-
tor switches make it easy to configure device control pins (pins 1, 2, 7, or 8) for proper
operation without the use of jumpers. Similarly, XO device VDD voltage (3.3V, 2.5V,
1.8V) can be selected via switches based on either ex5V (for stand-alone opera-
tion) or micro USB s5V USB operation. The EVB also features flexible output
termination circuits and PCB layout optimized for superior signal integrity.
KEY FEATURES
• Evaluation of any Silicon Labs XO or
VCXO (Si51x, Si53x, Si54x, Si55x, Si56x,
Si57x, Si59x)
• AC coupled differential/single-ended output
clocks.
• Voltage control (Vc) port for VCXO
evalution.
• Switch selectable settings. No jumpers.
• External power or USB powered.
• Use stand-alone or with our
grammable Oscillator Calculator SW tool
XO
Location 1
(5mm x 7mm)
Output
Termination
Pin 1
Signal
Selector
Switch
Pin 2
Signal
Selector
Switch
Pin 7
Signal
Selector
Switch
Pin 8
Signal
Selector
Switch
CLK1_P
CLK1_N
Voltage
Selector
Switches
Power
Supply
XO
Location 2
(3.2mm x 5mm)
Output
Termination
CLK2_P
CLK2_N
XO
Location 3
(2.5mm x 3.2mm)
Output
Termination
CLK3_P
CLK3_N
Ext +5V
micro
USB
Pin 1
Pin 2
Pin 7
Pin 8
Pin 1
Pin 2
Pin 7
Pin 8
Pin 1
Pin 2
Pin 7
Pin 8
Vc_In
Pin 1
Pin 2
Pin 7
Pin 8
+VDD
+VDD
GND
SDA
+VDD
GND
SCL
+VDD
GND
SDA
+VDD
GND
SCL
Power
Select
Switch
Silicon Labs
MCU
SDA
SCL
I2C Bus
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