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Overview

OSC_32.768KHz is an on-chip clock generator that generates low frequency oscillator clock, which includes starting circuit, current source circuit, charge-discharge circuit and automatic calibration circuit.

After frequency calibration, the frequency accuracy can reach ±3% over a wide temperature range, and consumes ultra-low power. While generating 32.768KHz output clock, the static current which the whole OSC IP consumes, is as low as 500nA.

The low-frequency clock module is based on TSMC 40nm ULP process.

 

Features

n Typical frequency of output clock: 32.768KHz

n Analog supply voltage: 0.81V~0.99V 

n Frequency accuracy: (after trimming)

-3% ≤ η ≤ +3%, temperature range: -40℃~125℃  

n Typical power consumption:

420nA@32.768KHz, 0.9V

n Based on TSMC 40nm ULP process,Operating junction temperature:

-40°C ~ +25°C ~ +125°C

n Area≈0.02mm²