PI6C557-01BZHIEX Diodes Incorporated

PI6C557-01B PCIe 3.0 Clock Generator with 1 HCSL Outputs Features Description PCIe 3.0 compliant e PTh I6C557-01B is a spread spectrum clock generator compli - ant to PCI Express 3.0 and Ethernet requirements. The device is Phase jitter - 0.45ps RMS (High Freq. Typ.) used for PC or embedded systems to substantially reduce Electro- LVDS compatible output magnetic Interference (EMI). Supply voltage of 3.3V 10% 25MHz crystal or clock input frequency e PTh I6C557-01B provides one differential (HCSL) or LVDS HCSL outputs, 0.8V Current mode differential pair spread spectrum output. Using Pericom's patented Phase-Locked Jitter 35ps cycle-to-cycle (typ) Loop (PLL) techniques, the device takes a 25MHz crystal input and produces one pair of differential outputs (HCSL) at 100MHz. Spread of -0.5% and no spread It also provides spread selection of -0.5% and no spread. Industrial temperature range Spread Bypass option available Spread selection via external pins Packaging: (Pb-free and Green) 16-pin TQFN Block Diagram Pin Configuration (16-Pin TQFN) VDD 13 GND 1 CLK Control SS1 Logic Phase CLK X1 CLK Lock CLK Loop X2 GND X1/CLK Crystal 25 MHz NC 9 VDDA Driver 5 crystal or clock X2 (IREF) Pulling R R Capacitors GND All trademarks are property of their respective owners. PI6C557-01B RevB 04/07/2014 14-0045 1 GND NC SS1 VDD IREF NC NC NCPI6C557-01B PCIe 3.0 Clock Generator with 1 HCSL Output Pin Description Pin # Pin Name I/O Type Description 1 GND Power Connect to ground 2 X1 Input Crystal or reference clock in 3 X2 Output Xtal out. Leave unconnected for clock input. 4 NC - No connect. Must not be connected to GND 5 GND Power Connect to ground 6 SS1 Input Spread select 1. Internall pull up resistor 7 IREF Output 475 precision resistor attached to this pin is connected to the internal current reference. 8 NC - No connect. Must not be connected to GND 9 VDDA Power Connect to 3.3V source 10 GND Power Connect to ground 11 CLK Output HCSL complimentary clock output 12 CLK Output HCSL clock output 13 NC - No connect. Must not be connected to GND 14 NC - No connect. Must not be connected to GND 15 VDD Power Connect to 3.3V source for OSC and core 16 NC - No connect. Must not be connected to GND Table 1: Spread Selection Table SS1 Spread 0 Down -0.5% 1 No Spread All trademarks are property of their respective owners. PI6C557-01B RevB 04/07/2014 14-0045 2