Internal Oscillator Parameters(1)

Table 1.
Standard Operating Conditions (unless otherwise stated)
Param No. Sym. Characteristic Min. Typ. † Max. Units Conditions
OS50 FHFOSC Precision Calibrated HFINTOSC Frequency

4

8

12

16

32

48

64

MHz (Note 2)
OS51 FHFOSCLP Low-Power Optimized HFINTOSC Frequency

0.91

1

1.09

MHz

Fundamental Freq.1 MHz; -40°C to 85°C

1.76 2 2.24

MHz

Fundamental Freq.2 MHz; -40°C to 85°C

MHz

Fundamental Freq.1 MHz; -40°C to 125°C

MHz

Fundamental Freq.2 MHz; -40°C to125°C

OS52 FMFOSC Internal Calibrated MFINTOSC Frequency 500 kHz  
OS53* FLFOSC Internal LFINTOSC Frequency 27.9 31 34.1 kHz  
OS54* THFOSCST HFINTOSC Wake-up from Sleep Start-up Time

13

30

84

93

40

μs

μs

μs

μs

VREGPM = 00

VREGPM = 01

VREGPM = 10

VREGPM = 11

System Clock at 4 MHz

OS55 TLFOSCST LFINTOSC Wake-up from Sleep Start-up Time 0.3 ms  
OS56 FSFOSC Internal Calibrated SFINTOSC Frequency 1 MHz  

* These parameters are characterized but not tested.

† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.

Notes:
  1. 1.To ensure these oscillator frequency tolerances, VDD and VSS must be capacitively decoupled as close to the device as possible. 0.1 μF and 0.01 μF values in parallel are recommended.
  2. 2.See the figure below.
Figure 1. Precision Calibrated HFINTOSC Frequency Accuracy Over Device VDD and Temperature