8N4SV76FC-0136CDI8

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Programmable Timers and Oscillators

Timers and oscillators provide timing signals or pulses needed for many types of applications by conveying the passage of time. Programmable timer/oscillators are electronic circuits that synchronize multiple time-related functions while maintaining control over the timing accuracy of a given system. 8N4SV76FC-0136CDI8 is a programmable timer/oscillator produced by Taiwan-based Hualon Corporation.

Overview

The 8N4SV76FC-0136CDI8 is a single-chip programmable oscillator that offers an extended operating temperature range of -40 to +105°C. It has a frequency range of 1.8 kHz to 170 MHz, programmable via SPI interface, with options to be set by pull-down and push-push resistors. The chip features a low power consumption of only 1mA and consumes only 5 mA when running at full speed. It is able to output up to 10 differential clock outputs at up to 3.3V and has independent periods ranging from 150ns to 1024 seconds.

Application

The 8N4SV76FC-0136CDI8 can be used in a wide range of applications, a few examples are:

• PCI Express implementations, where the chip offers frequency divider and period programmability.
• Measurement of frequency, period, and phase-shift for precise monitoring of events within a system.
• Synchronization of multiple components in multi-processor systems, such as video processing, to support simultaneous operation.
• Dedicated-function controllers, such as motors, to ensure reliable operation and error-free timing.

Working Principle

The 8N4SV76FC-0136CDI8 follows a basic timing law principle: given time T and frequency f, the period of the signal P is equal to T*f. By changing the size of the counter T, the frequency of the signal changes in a proportional manner. If a constant frequency is needed, the counter can be kept static, while capacitors and resistors are used to match the time T. The chip allows for the direct connection of up to five slave oscillators, enabling a synchronized output across multiple devices in a given system.

The chip is able to detect the rising or falling edges of the main clock and produce an output forthwith. When multiple inputs are detected, the output is continually adjusted depending on the period between the respective inputs. Also, if no input is detected, the chip is able to automatically shut down, significantly reducing the power consumption of the system.

The output signals of the 8N4SV76FC-0136CDI8 are industry standard single-ended LVCMOS differential clock signals, providing the necessary common mode noise and EMI protection, making them suitable for use in a variety of applications. The chip also offers optional synchronization with an external clock input.

Customers of the 8N4SV76FC-0136CDI8 have the option of using the device in both industrial and automotive grade applications to help meet their specific requirements.

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