CDC111FNRG4

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The CDC111FNRG4 is a high-performance, low-skew, and ultra-low-power clock buffer/driver integrated circuit (IC) designed and manufactured by Texas Instruments (TI). It is a highly integrated, low-voltage, four-output clock buffer/driver with pin compatible versions down to 1.8 V.

This device supports dual operating frequencies, up to 600 megahertz (MHz) and duty cycle adjustment capability. In addition, the CDC111FNRG4 provides flexible pinout and frequency configuration, which allows for easy design optimization for reduced system power consumption and minimized clock skews.

The CDC111FNRG4 is targeted specifically for mobile and system-on-chip (SOC) designs—delivering the ideal combination of performance, low power, and small size.

Applications

The primary application of the CDC111FNRG4 is for providing multiple copies of a synchronized clock reference for data processing systems and peripherals. Typical implementations include:

• Cell phones
• Personal digital assistants (PDAs)
• Personal computers
• Digital video broadcast (DVB) equipment
• Set-top boxes
• Embedded systems

Working Principle

The CDC111FNRG4 circuit is designed to address a wide range of applications in mobile, portable, and SOC designs that require low-power clock and data timing solutions.

It supports low-skew, low-jitter timing and four bidirectional outputs that can each provide either clock or data signals. The outputs can be individually driven from two separate input sources, or can be combined into two independently driven clock outputs.

In addition, the CDC111FNRG4 supports adjustable duty cycle, up to 600 MHz operating frequency, and independent output polarity for driving different types of clocks. Its various features make the CDC111FNRG4 an ideal choice for clocking datapaths and providing low-skew timing for multimedia and other high-speed systems.

The CDC111FNRG4 operates on a low voltage, typically 1.8 VDC, allowing designers to minimize power consumption up to 5 times of current alternatives. It also features a spread-spectrum capability, allowing designers to spread out electromagnetic interference (EMI) in their systems and comply with the FCC requirements.

The device meets shift and hold time requirements of the Common Probus Standard and is compliant to the IEEE 802.3z Gigabit Ethernet Standard. It includes two differential inputs and four differential outputs, both SMT and BJT. The CDC111FNRG4 is tested for immunity to voltage transients and ensures low jitter for output clocks.

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