PIC16C54/55/56/57
PIC16C5X
12.0 DC AND AC CHARACTERISTICS - PIC16C54/55/56/57
The graphs and tables provided in this section are for design guidance and are not tested. In some graphs or tables the
data presented are outside specified operating range (e.g., outside specified VDD range). This is for information only
and devices will operate properly only within the specified range.
The data presented in this section is a statistical summary of data collected on units from different lots over a period of
time. “Typical” represents the mean of the distribution while “max” or “min” represents (mean + 3σ) and (mean – 3σ)
respectively, where σ is standard deviation.
FIGURE 12-1: TYPICAL RC OSCILLATOR FREQUENCY vs.TEMPERATURE
FOSC
Frequency normalized to +25°C
FOSC (25°C)
1.10
Rext ≥ 10 kΩ
Cext = 100 pF
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
VDD = 5.5 V
VDD = 3.5 V
0.92
0.90
0.88
0
10
20
25
30
40
50
60
70
T(°C)
TABLE 12-1: RC OSCILLATOR FREQUENCIES
Average
Fosc @ 5 V, 25°C
Cext
Rext
20 pF
3.3 k
5 k
4.973 MHz
3.82 MHz
2.22 MHz
262.15 kHz
1.63 MHz
1.19 MHz
684.64 kHz
71.56 kHz
660 kHz
± 27%
± 21%
± 21%
± 31%
± 13%
± 13%
± 18%
± 25%
± 10%
± 14%
± 15%
± 19%
10 k
100 k
3.3 k
5 k
100 pF
300 pF
10 k
100 k
3.3 k
5.0 k
10 k
160 k
484.1 kHz
267.63 kHz
29.44 kHz
The frequencies are measured on DIP packages.
The percentage variation indicated here is part-to-part variation due to normal process distribution. The variation
indicated is ±3 standard deviation from average value for VDD = 5 V.
1998 Microchip Technology Inc.
Preliminary
DS30453B-page 81
MICROCHIP [ MICROCHIP ]
