Datasheet SKY53510 (Skyworks) - 9

DATA SHEET SKY53510/SKY53580/SKY53540 Table 3. SKY53540 5x5 mm 32-QFN Pin Descriptions (Continued) Pin Name Type1 Description
15 CLK0b I Input clock 0 (complement). 16 CLK_SEL1 I Mux input select pin. CLK_SEL1 contains an internal pull-down resistor. 17 GND GND Ground. 18 Q3b O Output clock 3 (complement). 19 Q3 O Output clock 3. 20 VDDOB P Output voltage supply-Bank B (Outputs: Q2 to Q3). Bypass with 0.1 µF capacitor and place as close to the VDDOB pin as possible. 21 Q2b O Output clock 2 (complement). 22 Q2 O Output clock 2. Output voltage supply-Bank B (Outputs: Q2 to Q3). 23 VDDOB P Bypass with 0.1 µF capacitor and place as close to the VDDOB pin as possible. 24 GND GND Ground. 25 NC — No Connect. 26 CLK1b I Input clock 1 (complement). 27 CLK1 I Input clock 1. Core voltage supply. 28 VDD P Bypass with 0.1 µF capacitor placed as close to the VDD pin as possible. 29 REFOUT O LVCMOS reference output clock. Enable this output by pulling Pin 31 high. 30 VDDOC P REFOUT buffer supply. Bypass with 0.1 µF capacitor placed as close to the VDDOC pin as possible. 31 OE_REF I Output Enable for REFOUT. OE_REF contains an internal pull-down resistor. 32 SFOUT1 I Output signal format control pin for Bank A and Bank B. SFOUT1 contains an internal pull-down resistor. GNDPad GND GND Power supply ground and thermal relief. 1. Pin types are: I = input, O = output, P = power, GND = ground. Skyworks Solutions, Inc. • Phone [949] 231-3000 • sales@skyworksinc.com • www.skyworksinc.com 207106A • Skyworks Proprietary Information • Products and Product Information are Subject to Change without Notice 9 August 1, 2025 Document Outline Key Features 1. Pin Descriptions 1.1. SKY53510 7x7 mm 48-QFN Pin Descriptions 1.2. SKY53580 6x6 mm 40-QFN Pin Descriptions 1.3. SKY53540 5x5 mm 32-QFN Pin Descriptions 2. Detailed Description 2.1. Overview 2.2. Block Diagrams 2.3. Modes of Operation 2.3.1. Input Clock Stage 2.3.2. Clock Outputs 3. Applications Information 3.1. Driving Clock Inputs (CLK0/CLK1) 3.2. Crystal Interface (XA/XB) 3.3. Clock Output Termination 3.3.1. DC-Coupled Differential Output Driver Terminations 3.3.2. AC-Coupled Differential Output Driver Terminations 4. Power Supply (VDD and VDDOx) 4.1. Power Supply Sequencing 5. Electrical Specifications 6. Typical Performance Characteristics 7. Package and Handling Information 7.1. 48-QFN Package Diagram 7.2. 40-QFN Package Diagram 7.3. 32-QFN Package Diagram 8. Land Patterns 8.1. 48-QFN Land Pattern 8.2. 40-QFN Land Pattern 8.3. 32-QFN Land Pattern 9. Top Markings 9.1. SKY53510/80/40 Top Markings 10. Ordering Guide 11. Revision History