MPC9819ENR2

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MPC9819ENR2 is a highly accurate, low-cost, low-power clock/timing application-specific integrated circuit (ASIC). It is designed for use in various timing applications, including real-time clocks, clock/timers, and embedded applications such as digital watches and digital multi-meter displays.

The MPC9819ENR2 features a 32 kHz crystal oscillator, a programmable PLL with prescaler and fractional-divider loop filter, programmable internal clock dividers, absolute-time engine and clock/timing peripheral control functions, on-chip voltage regulators, and an integrated crystal load capacitor. The frequency range of the MPC9819ENR2 can be programmed over a range of up to 600 kHz with a clock resolution of up to 5.5ps.

The integrated oscillator consists of an on-chip crystal oscillator and a programmable PLL with a built-in loop filter and prescaler. The crystal oscillator utilizes a low power and low-cost 32 kHz quartz crystal connected to the dedicated crystal pins of the IC. The frequency of the oscillator is then divided by the programmable PLL before being divided further by the clock dividers to generate all the required clock/timing outputs. The PLL also contains a fractional-divider loop filter which simplifies the programming of the frequency control range.

The integrated absolute-time engine provides a precise time reference for all the clock/timing outputs. It supports a variety of timing formats such as calendar and time-of-day (TOD) and can be programmed with up to four different time points. The on-chip voltage regulator enables the voltage of the IC to be adjusted in order to accommodate variations in the operating environment and reduces power consumption by optimising the bias current levels.

The MPC9819ENR2 also includes a number of clock/timing peripheral control functions such as programmable clock/timer interrupt sources, clock/timer divider settings, and clock suspend/resume control. These features can be used to implement complex timing sequences and provide comprehensive support for clock and timing peripherals such as digital watches and digital multi-meter displays.

In summary, the MPC9819ENR2 is an ideal choice for low-cost, low-power and highly accurate timing applications, such as real-time clocks and clock/timers. It features an integrated crystal oscillator, a programmable PLL with prescaler and fractional-divider loop filter, programmable internal clock dividers, absolute-time engine, and a range of clock/timing peripheral control functions, all integrated in a single device.

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