SI52146

www.DataSheet.co.kr Si52146 PCI-EXPRESS GEN 1, GEN 2, & GEN 3 SIX OUTPUT CLOCK GENERATOR Features       PCI-Express Gen 1, Gen 2, &  Gen 3 compliant Low power push-pull type  differential output buffers Integrated resistors on differential  clocks Dedicated output enable pin for each clock Hardware selectable spread  control Six PCI-Express clocks  25 MHz crystal input or clock input I2C support with readback capabilities Triangular spread spectrum profile for maximum electromagnetic interference (EMI) reduction Industrial temperature: –40 to 85 oC 3.3 V Power supply  32-pin QFN package Ordering Information: See page 18 Applications   Pin Assignments CKPWRGD_PDB1 SDATA 26 XOUT OE11 OE01 32 31 30 29 VDD XIN 28 27 25 24 VDD 23 DIFF5 22 DIFF5 21 VDD Description The Si52146 is a spread-controlled PCIe clock generator that can source six PCIe clocks simultaneously. The device has six hardware inputs for enabling the respective outputs on the fly while powered on along with the spread control hardware pin to enable Spread for EMI reduction. VDD OE21 SSON 2 OE31 OE41 OE51 NC VDD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 33 GND SCLK 20 Network attached storage Multi-function printer   Wireless access point Routers DIFF4 19 DIFF4 18 DIFF3 17 DIFF3 DIFF1 DIFF0 DIFF0 DIFF1 DIFF2 VDD Notes: 1. Internal 100 kohm pull-up. 2. Internal 100 kohm pull-down. DIFF0 XIN/CLKIN XOUT DIFF1 Patents pending PLL1 (SSC) Divider DIFF2 DIFF3 DIFF4 SC...