1FEATURES

· Qualified for Automotive Applications

· Phase-Locked 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 the

Range 66 MHz to 200 MHz

· Distributes One Clock Input to One Bank of

Five Outputs (CLKOUT Is 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 SOIC Package

· Consumes Less Than 100 mA (Typically) 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

DESCRIPTION

The CDCVF2505 is a high-performance, low-skew, low-jitter, phase-lock loop (PLL) clock driver. It uses a PLL to

precisely align, in both frequency and phase, the output clocks (1Y[0–3] and CLKOUT) to the input clock signal

(CLKIN). The CDCVF2505 operates at 3.3 V. It 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 in power-down mode when no input

signal is applied to CLKIN.

Unlike many products containing PLLs, the CDCVF2505 does not require an external RC network. The loop filter

for the PLLs is included on-chip, minimizing component count, space, and cost.

Because it is based on the PLL circuitry, the CDCVF2505 requires a stabilization time to achieve phase lock of

the feedback signal to the reference signal. This stabilization is required following power up and application of a

fixed-frequency, fixed-phase signal at CLKIN, and following any changes to the PLL reference.

The CDCVF2505 is characterized for operation from –40°C to 85°C.