DSC557-03 Two Output PCIe Gen1/2/3/4 Clock Generator Features General Description Complies with PCIe Gen1/2/3/4 Common Clock The DSC557-03 is a two output PCI express clock Spec generator meeting Gen1, Gen2, Gen3 and Gen 4 specifications. The clock generator uses proven silicon Integrated MEMS Resonator Eliminates the Need MEMS technology to provide 100 MHz* differential for External 25 MHz Crystal output clocks with excellent jitter and stability over a 100 MHz HCSL/LVDS/LVCMOS Options wide range of supply voltages and temperatures. By Available eliminating the external quartz crystal, the DSC557-03 Wide Temperature Range: significantly enhances reliability and accelerates - Ext. Industrial: 40C to +105C product development, while meeting stringent clock - Industrial: 40C to +85C performance criteria for a variety of communications, storage, and networking applications. - Commercial: 20C to +70C Supply Range of 2.25V to 3.6V DSC557-03 has an Output Enable / Disable feature allowing it to disable the outputs when OE is low. The Low Power Consumption device is available in a space saving 14 pin QFN. - 30% Lower than Competing Devices Additional output formats are also available in any Excellent Shock & Vibration Immunity combination of LVCMOS, LVDS, and HCSL. - Qualified to MIL-STD-883 Space Saving 14-Lead QFN Package Lead-Free and RoHS-Compliant Block Diagram Applications Communications/Networking - Ethernet Control Circuitry - 1G, 10GBASE-T/KR/LR/SR, and FcoE - Routers and Switches CLK0+ - Gateways, VoIP, Wireless APs Output MEMS PLL CLK0- Control - Passive Optical Networks and Divider Storage CLK1- OE CLK1+ - SAN, NAS, SSD, JBOD Embedded Applications - Industrial, Medical, and Avionics - Security Systems and Office Automation - Digital Signage, POS and others Consumer Electronics - Smart TV, Bluray, STB 2020 Microchip Technology Inc. 1DS20006318A-page DSC557-03 Package Type Connection Diagram Pin Diagram 14 Pin QFN 14 Pin QFN Two HCSL Outputs) 3.2 mm x 2.5 mm + 0.01 uF 0.01 uF VDD - 14 13 12 14 13 12 1 11 CLK0+ OE 1 11 CLK0+ CLK0- 2 10 + NC 2 CLK0- 10 Enable 50 : 50 : 3 9 - NC 3 9 CLK1- 4 8 5 6 7 VSS 4 8 CLK1+ CLK1- Ropt 5 6 7 CLK1+ Ropt 22 33 : : optional 50 : 50 : TABLE 0-1: PIN DESCRIPTION (14 QFN) Pin Number Pin Name Pin Type Description 1 OE I Output Enable Active-high. 2 NC N/A Ground recommended or leave as a NC. 3 NC N/A Ground recommended or leave as a NC. 4 VSS Power Ground. 5 NC N/A Ground recommended or leave as a NC. 6 NC N/A Ground recommended or leave as a NC. 7 NC N/A Ground recommended or leave as a NC. 8 CLK1+ O True output of differential pair. 9 CLK1 O Complement output of differential pair. 10 CLK0 O Complement output of differential pair. 11 CLK0+ O True output of differential pair. 12 VDD1 Power Power Supply for Output 1 (CLK1+/). 13 VDD0 Power Power Supply for Core and Output 0 (CLK0+/). 14 NC N/A Ground recommended or leave as a NC. Thermal pad, floating, not DC connected to substrate ePAD ePAD N/A ground. 2DS20006318A-page 2020 Microchip Technology Inc. NC NC NC VDD0 NC VDD1