Si535x-B20QFN-EVB Si5350/51 EVALUATION BOARD USERS GUIDE Description Features The Si535x-B20QFN-EVB is used for evaluating the ClockBuilder Pro configurable, allowing quick Si5350/51 any-frequency, 0.0025200 MHz CMOS frequency plan analysis clock generator + VCXO. Fully-powered from a single USB port The pre-soldered 20-QFN device can be configured Onboard 27 MHz crystal for asynchronous operation using ClockBuilder Pro to emulate all available SMA and test point hook for interfacing to an Si5350/51 package options, including 10-MSOP, 16- external clock reference QFN, and 20-QFN. Jumper-selectable VDD and VDDOx allows device to operate at 1.8 (VDDO only), 2.5, or 3.3 V Voltage supply jumpers provide easy access for use with external supplies Functional Block Diagram Vreg* Vreg* VReg VReg VReg Jumper Selectable Vreg 1.8 V (VDDO only) / 2.5 V / 3.3 V VDD VDDO0 CLK0 CLK1 XTAL VDDO1 CLK2 CLK3 CLKIN Si5350/51 VDDO2 V C CLK4 CLK5 I2C VDDO3 CLK6 CLK7 Status LEDs MCU Reset USB Switch Connector Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 0.4 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 13, 2021 I2C BusSi535x-B20QFN-EVB 1. Functional Block Diagram Figures 1 and 2 highlight the main features of the EVB. The onboard MCU is responsible for programming the Si535x timing IC, measuring the device s current consumption reported in the ClockBuilder Pro EVB GUI, managing power, and controlling status LEDs. VDD and VDDO jumpers allow the option of choosing between 1.8 (VDDO only), 2.5, and 3.3 V or powering the device with external supplies (see Section 2. Jumpers for details). 2 2 2 I C jumpers allow the Si535x to be disconnected from the I C bus, allowing external control from another I C master. The Si5350 device on this board is a hybrid of the Si5350/51 A, B, and C variants. It can be configured to emulate a 10-MSOP, 16-QFN, or 20-QFN device. It can run in stand-alone asynchronous mode (Si5350/51A) using the onboard 27 MHz XTAL (Y1), or it can be synchronized to an external clock using the CLKIN SMA connector or test points (Si5350/51C). It can also accept a V input when in VCXO (Si5350/51B) mode. C Note: EVBs labelledREV 1.1 orREV 1.2 are populated with rev A devices. Figure 1. EVB Features (Front) 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 0.4 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 13, 2021