Datasheet

 1996 Microchip Technology Inc. DS30412C-page 163
PIC17C4X
Applicable Devices 42
R42 42A 43 R43 44
18.0 PIC17C42 DC AND AC CHARACTERISTICS
The graphs and tables provided in this section are for design guidance and are not tested or guaranteed. In some graphs
or tables the data presented are outside specified operating range (e.g. outside specified V
DD
range). This is for infor-
mation only and devices are ensured to 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 + 3 σ ) and (mean - 3 σ )
respectively where σ is standard deviation.
TABLE 18-1: PIN CAPACITANCE PER PACKAGE TYPE
FIGURE 18-1: TYPICAL RC OSCILLATOR FREQUENCY vs. TEMPERATURE
Pin Name
Typical Capacitance (pF)
40-pin DIP 44-pin PLCC 44-pin MQFP 44-pin TQFP
All pins, except MCLR
,
V
DD
, and V
SS
10 10 10 10
MCLR
pin 20 20 20 20
FOSC
FOSC (25°C)
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
010 20253040506070
T(°C)
Frequency normalized to +25°C
VDD = 5.5V
VDD = 3.5V
Rext ≥ 10 kΩ
Cext = 100 pF
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