1 Features
1• Phase-Lock Loop Clock Driver for Synchronous
DRAM and General-Purpose Applications
• Spread Spectrum Clock Compatible
• Operating Frequency: 24 MHz to 200 MHz
• Low Jitter (Cycle-to-Cycle): < |150 ps|
(Over 66 MHz to 200 MHz Range)
• Distributes One Clock Input to One Bank of Five
Outputs (CLKOUT Used to Tune the Input-Output
Delay)
• Three-States Outputs When There Is No Input
Clock
• Operates From Single 3.3-V Supply
• Available in 8-Pin TSSOP and 8-Pin SOIC
Packages
• Consumes Less Than 100 mA (Typical) in Power-
Down Mode
• Internal Feedback Loop Is Used to Synchronize
the Outputs to the Input Clock
• 25-Ω On-Chip Series Damping Resistors
• Integrated RC PLL Loop Filter Eliminates the
Need for External Components

2 Applications
• Synchronous DRAMs
• Industrial Applications
• General-Purpose Zero-Delay Clock Buffers

3 Description
The CDCVF2505 is a high-performance, low-skew,
low-jitter, phase-lock loop (PLL) clock driver. This
device uses a PLL to precisely align the output clocks
(1Y[0-3] and CLKOUT) to the input clock signal
(CLKIN) in both frequency and phase. The
CDCVF2505 operates at 3.3 V and also provides
integrated series-damping resistors that make it ideal
for driving point-to-point loads.
One bank of five outputs provides low-skew, low-jitter
copies of CLKIN. Output duty cycles are adjusted to
50 percent, independent of duty cycle at CLKIN. The
device automatically goes into power-down mode
when no input signal is applied to CLKIN.
The loop filter for the PLLs is included on-chip. This
minimizes the component count, space, and cost.
The CDCVF2505 is characterized for operation from
–40°C to 85°C.