CDC318ADL

Clock/timing circuits are widely used in digital systems. Clock buffers, drivers and distribution networks are widely used to manage interfacing between different components, and one such device is the CDC318ADL from ON Semiconductor. The CDC318ADL is a low skew, low jitter clock buffer that is designed for distribution of low-voltage differential signals (LVDS) for clock and data distribution in high-speed clock networks.

LVDS is a balanced electrical signalling technology which allows for the transmission of data over longer distances at higher frequency, with minimal electromagnetic radiation. The CDC318ADL is designed to drive LVDS clocks and data up to 200 MHz with less than 0.2 pS of jitter, while still maintaining low skew between output signals. This makes it an ideal choice for clock networks running at high speeds.

The CDC318ADL has two input signals, an LVDS clock signal and a differential control signal, both referenced to the device’s ground. The LVDS clock signal is then buffered and sent to the device’s eight outputs, each of which can operate at a frequency of up to 200 MHz. The differential control signal determines whether the corresponding output should be enabled or disabled, allowing for greater control of the device’s clock network.

The CDC318ADL also has an optional spread spectrum mode which reduces electromagnetic interference and helps prevent crosstalk. Spread spectrum mode works by modulating the clock signal such that when it passes through the output buffers, the variations cause a frequency-dependent phase shift resulting in a more effective decoupling of the outputs. This reduces the amount of crosstalk and EMI, and eliminates the need for additional shielding of the device.

In terms of power and physical requirements, the CDC318ADL operates on a single voltage supply ranging from 1.71 V to 3.6 V and consumes a maximum of 140 mW. The device also features small package sizes, allowing for it to fit within tight board design layouts, and also comes in different temperature ranges for operation in various environments.

In conclusion, the CDC318ADL from ON Semiconductor is a low skew, low jitter clock buffer designed for use in clock networks running at frequencies of up to 200 MHz. It features spread spectrum mode for greater control of EMI levels, and is ideal for applications requiring high speed data transmission with minimal interference. It operates on a single voltage supply and has small package sizes for easier board design layouts.