Si51211 Data Sheet Three Output Factory Programmable Clock Generator KEY FEATURES The factory programmable Si51211 is a low power, small footprint and frequency flexible Generates up to 3 CMOS clock outputs programmable clock generator targeting low power, low cost and high volume consumer from 3 to 170 MHz and embedded applications. The device operates from a single crystal or an external Accepts crystal or reference clock input clock source and generates 1 to 3 outputs up to 170 MHz. The device is factory pro- 3 to 165 MHz reference clock input grammed to provide customized output frequencies and control input such as frequency 8 to 48 MHz crystal input select, spread spectrum on, power down and output enable. Center spread spectrum can also be programmed to reduce EMI to meet board level system requirements. Programmable FSEL, SSONb, PD, and OE input functions Applications Digital still camera Crystal/XO replacement IP phone EMI reduction Smart meter Portable devices SSCLK1/ 4 REFCLK/ PLL with XIN/ 3 OE/FSEL/ Modulation CLKIN SSONb Control Buffers, Dividers, 2 XOUT and SSCLK2/ 6 Switch OE/SSONb/PD 8 To Pin 7 Programmable VDDO Matrix Configuration Register 1 V-REG To Core VDD SSCLK3 To Pin 4 and Pin 6 7 (VDDO) VSS 5 silabs.com Smart. Connected. Energy-friendly. Rev. 1.0 Si51211 Data Sheet Feature List 1. Feature List The Si51211 highlighted features are listed below. Generates up to 3 CMOS clock outputs from 3 to 170 MHz Separate voltage supply pins Accepts crystal or reference clock input V = 2.5 to 3.3 V DD 3 to 165 MHz reference clock input V = 1.8 to 3.3 V (V < V ) DDO DDO DD 8 to 48 MHz crystal input 0.25%, 0.5% or 1% spread spectrum (center spread) Programmable FSEL, SSONb, PD, and OE input functions Low cycle-cycle jitter Low power dissipation Ultra small 8-pin TDFN package (1.4 mm x 1.6 mm) silabs.com Smart. Connected. Energy-friendly. Rev. 1.0 1