MC146818p footprint, schematic symbol and 3D model by Motorola

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MC146818p Details

The MC146818P can operate up to a maximum clock frequency of 1 MHz.
The MC146818P has a built-in battery backup circuit that allows it to retain its data during power failure. The battery backup voltage is typically in the range of 2.5V to 3.5V.
The RST (Reset) pin on the MC146818P is an active-low input that resets the device when pulled low. It is typically used to initialize the device during power-up or to recover from a fault condition.
The MC146818P has a built-in oscillator startup circuit that ensures reliable startup and stabilization of the oscillator. The device also has a clock monitor circuit that detects clock failures and resets the device if necessary.
The MC146818P has a 50-byte RAM that can be written to. The RAM is divided into 10 bytes for the clock and calendar, and 40 bytes for general-purpose use.

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	MC146818AP Motorola Semiconductor Products Real Time Clock, 1 Timer(s), CMOS, PDIP24
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