Silicon Labs PCI Express (PCIe) Gen 1/2/3 Clock SL28SRC04

Silicon Labs' PCI Express clocks provide industry-leading jitter performance, compliance with PCI Express (PCIe) Gen 1/2/3 requirements, outstanding frequency flexibility and configurable AC parameters for signal integrity optimization.

The PCIe Clock family addresses the specific clock requirements of PCIe Generation 1, 2, or 3 system interfaces. This interface standard has become the industry choice as a high speed interconnect between devices and system I/Os and is used in consumer, server, storage, IP gateways, multi-function printers (MFPs) and industrial applications.

Features:

• Low power consumption (<4 mA) HCSL output drivers
• Integrated termination resistors on PCIe outputs
• I²C control interface for AC parameter and frequency tuning
• Scalable outptut voltage VDD_IO (3.3 to 1.05 V)
• Up to 6 PCIe outptus from clock generator
• Operate from widely available, low cost crystals (14.318 or 25 MHz)
• Supports industrial grade (-40˚ C to + 85˚ C)
• 32- and 48-pin QFN and 16/20/24/28/48-pin TSSOP packages

Silicon Labs' programmable spread spectrum clock generators feature a wide range of programming options that allow system designers to minimize electro-magnetic interference (EMI) at the application level.

Configurable parameters to reduce EMI include a wide range of signal integrity adjustments like rise/fall times, output impedance, drive strength, programmable edge rates, programmable skew and spread spectrum percentage/modulation rate.

Features:

• Output frequencies from 1 to 200 MHz
• CLKOUT, REFOUT or SSCLK output options
• CLKIN or XO input options
• 8 to 48 MHz crystal input range
• 1 to 166 MHz clock input range
• Spread percent from 0 to 5.0%
• Down or center spread options
• Spread modulation frequency from 16 to 128 kHz
• On-chip programmable crystal capacitive load (CL): 8 to 20 pF
• User-definable control pins: PD#, OE or SSON#
• Frequency select, spread select
• 7 drive strength (programmable tr/tf) options