CDCU877RHAR

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High speed CPUs and Internet of Things (IoT) devices have become increasingly widespread, necessitating the development of products with more complex timing and clock solutions. The common clock distribution solutions available are centralized clock distribution using a single clock signal, and distributed clock distribution using differential clock signals. In certain applications, more sophisticated and/or reliable clock distribution solutions are needed. In these cases, the application specific Clock/Timing solutions such as CDCU877RHAR can be used.

The CDCU877RHAR is a high performance clock distribution and timing IC developed by Texas Instruments. CDCU877RHAR has been designed specifically to meet the various clock distribution and timing needs in embedded applications. Its maximum delay is up to 100 ns, minimum pulse width is up to 500 ns, typical frequency range is up to 200 MHz, and typical output load is up to 10 mA. CDCU877RHAR is also designed with a high degree of reliability, making it an ideal choice for applications requiring high frequency or reliable clock distribution or timing.

CDCU877RHAR is a high-performance differential clock distribution and timing IC, it can provide up to four differential clock signals in many application scenarios. It is specially designed for applications that demand a high degree of reliability and need to provide multiple differential clock signals over long distances. The clock input supports multiple day operation, providing up to 1000ns of delay and up to 100ns of jitter reduction.

The CDCU877RHAR is generally used for applications requiring high reliability clock distribution or timing, such as routers and data centers, ultra-low latency applications, network-wide precise time synchronization, and any application where multiple clock signals are needed over long distances.

The CDCU877RHAR has two primary operating modes: active mode and holdover mode. When operating in active mode, the CDCU877RHAR accepts eight low-voltage differential signals (LVDS) from the Input banks. These inputs are then distributed to the Output banks, where selected output clocks are routed to dedicated LVDS outputs. The output clock also supports phase and frequency error monitoring, which allows for precise phase synchronization between output clocks.

In holdover mode, the output of the CDCU877RHAR is held steady even if the input signal is dropped. This mode is suitable for applications like data centers and retail networks, where some of the output clocks need to remain operational even if the input signal is interrupted.

The CDCU877RHAR can also be used in multiplexer mode where it can switch quickly between two clock sources depending on the type of application. It has two built-in multiplexers (A/B) connected to the same output clock, allowing users to quickly switch between either A or B as required. This allows the CDCU877RHAR to be used in multiple applications with the same output clock, such as multiple power supplies, or multiple CPUs.

In summary, CDCU877RHAR is a high-performance clock distribution and timing IC designed to provide reliable clock distribution and timing solutions for a variety of applications. It is suitable for applications that demand a high degree of reliability and need to provide multiple clock signals over long distances, and also supports multiplexer mode where it can quickly switch between two clock sources depending on the type of application.

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