87604AGILFT

• Fully integrated PLL
• Four LVCMOS/LVTTL outputs, 15ohms typical output impedance
• Selectable crystal oscillator interface or
• LVCMOS/LVTTL REF_IN clock input
• Maximum output frequency: 166.67MHz
• Maximum crystal input frequency: 38MHz
• Maximum REF_IN input frequency: 41.67MHz
• Individual banks with selectable output dividers for generating 33.333MHz, 66.66MHz, 100MHz and 133.333MHz
• Separate feedback control for generating PCI / PCI-X frequencies from a 16.66MHz or 20MHz crystal, or 25MHz or 33.33MHz reference frequency
• VCO range: 250MHz to 500MHz
• Cycle-to-cycle jitter: 120ps (maximum)
• Period jitter, RMS: 20ps (maximum)
• Output skew: 65ps (maximum)
• Static phase offset: 160ps ± 160ps
• Voltage Supply Modes:
• VDD/VDDA/VDDO
• 3.3/3.3/3.3
• 3.3/3.3/2.5
• -40°C to 85°C ambient operating temperature
• Available in both standard and lead-free RoHS compliant packages

Description
The ICS87604I is a 1:4 PCI/PCI-X Clock Generator and a member of the HiPerClockSTM family of high performance clock solutions from ICS. The ICS87604I has a selectable REF_CLK or crystal input. The REF_IN input accepts LVCMOS or LVTTL input levels. The ICS87604I has a fully integrated PLL along with frequency configurable clock and feedback outputs for multiplying and regenerating clocks with "zero delay". The PLL's VCO has an operating range of 250MHz-500MHz, allowing ICS87604I to be used in a variety of general purpose clocking applications. For PCI/PCI-X applications in particular, the VCO frequency should be set to 400MHz. ICS87604I can be accomplished by supplying 33.33MHz, 25MHz, 20MHz, or 16.66MHz on the reference clock or crystal input and by selecting ÷12, ÷16, ÷20, or ÷24, respectively as the feedback divide value. The divider on the output bank can then be configured to generate 33.33MHz (÷12), 66.66MHz (÷6), 100MHz (÷4), or 133.33MHz (÷3).

The ICS87604I is characterized to operate with its core supply at 3.3V and the bank supply at 3.3V or 2.5V. The ICS87604I is packaged in a small 6.1mm x 9.7mm TSSOP body, making it ideal for use in space-constrained applications.