
1996 Microchip Technology Inc.
DS30412C-page 165
PIC17C4X
Applicable Devices 42 R42 42A 43 R43 44
FIGURE 18-4: TYPICAL RC OSCILLATOR FREQUENCY vs. VDD
TABLE 18-2:
RC OSCILLATOR FREQUENCIES
Cext
Rext
Average
Fosc @ 5V, 25
°C
22 pF
10k
3.33 MHz
± 12%
100k
353 kHz
± 13%
100 pF
3.3k
3.54 MHz
± 10%
5.1k
2.43 MHz
± 14%
10k
1.30 MHz
± 17%
100k
129 kHz
± 10%
300 pF
3.3k
1.54 MHz
± 14%
5.1k
980 kHz
± 12%
10k
564 kHz
± 16%
160k
35 kHz
± 18%
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
4.0
4.5
5.0
5.5
6.0
6.5
F
OSC
(MHz)
VDD (Volts)
R = 10k
Cext = 300 pF, T = 25
°C
R = 160k
R = 3.3k
R = 5.1k
0.2
0.0