SI52112-B6-GTR

S i 5 2 11 2 - B 5 / B 6 PCI-E XPRESS G EN 3 DUAL O UTPUT C LOCK G ENERATOR Features       PCI-Express Gen 1, Gen 2, and Gen 3 common clock compliant Gen 3 SRNS Compliant Low power HCSL differential output buffers Supports Serial-ATA (SATA) at 100 MHz No termination resistors required 25 MHz Crystal Input or Clock input       Triangular spread spectrum profile for maximum EMI reduction (Si52112-B6) Extended Temperature: –40 to 85 °C 3.3 V Power supply Small packages: 8-pin TDFN (1.4 x 1.6 mm) 10-pin TDFN (3 x 3 mm) Si52112-B5 does not support spread spectrum outputs Si52112-B6 supports 0.5% down spread outputs Ordering Information: See page 13 Patents pending Applications Network attached storage Multi-function printer  PCIe Add-on Cards  Network Interface Cards  Docking Stations Wireless access point Routers  Digital Still Cameras  Digital Video Cameras     Description Si52112-B5/B6 is a high-performance, PCIe clock generator that can source two PCIe clocks from a 25 MHz crystal or clock input. The clock outputs are compliant to PCIe Gen 1, Gen 2, Gen 3 common clock, and Gen 3 SRNS specifications. The ultra-small footprint (1.4 x 1.6 mm) and industry leading low power consumption make Si52112-B5/B6 the ideal clock solution for applications with tight board space constraints. Measuring PCIe clock jitter is quick and easy with the Silicon Labs PCIe Clock Jitter Tool. Download it for free at www.silabs.com/pcie-learningcenter. Functional Block Diagram VDD DIFF1 XIN/CLKIN PLL Divider DIFF2 XOUT VSS Rev 1.3 3/20 Copyright © 2020 by Silicon Laboratories Si52112-B5/B6 Si52112-B5/B6 TABLE O F C ONTENTS Section Page 1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2. Crystal Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2.1. Crystal Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2.2. Calculating Load Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 3. Test and Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 4. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.1. 8-Pin TDFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 4.2. 10-Pin TDFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 4.3. 8-Pin TSSOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 5. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6. Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 6.1. 8-Pin TDFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.2. 10-Pin TDFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6.3. TSSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7. Recommended Design Guideline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Rev 1.3 2 Si52112-B5/B6 1. Electrical Specifications Table 1. DC Electrical Specifications Parameter Symbol Test Condition Min Typ Max Unit Operating Voltage VDD 3.3 V ± 5% 3.13 3.30 3.46 V Operating Supply Current IDD Full Active — — 17 mA Input Pin Capacitance CIN Input Pin Capacitance — 3 5 pF COUT Output Pin Capacitance — — 5 pF Output Pin Capacitance Table 2. AC Electrical Specifications Parameter Symbol Test Condition Min Typ Max Unit LACC Measured at VDD/2 differential — — 250 ppm TDC Measured at VDD/2 45 — 55 % CLKIN Rise and Fall Times TR/TF Measured between 0.2 VDD and 0.8 VDD 0.5 — 4.0 V/ns CLKIN Cycle-to-Cycle Jitter TCCJ Measured at VDD/2 — — 250 ps CLKIN Long Term Jitter TLTJ Measured at VDD/2 — — 350 ps Input High Voltage VIH XIN/CLKIN pin 2 — VDD+0.3 V Input Low Voltage VIL XIN/CLKIN pin — — 0.8 V Input High Current IIH XIN/CLKIN pin, VIN = VDD — — 35 µA Input Low Current IIL XIN/CLKIN pin, 0 < VIN