PIC17C44 Datasheet, PDF (163/241 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

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 VDD 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 + 3σ) and (mean - 3σ)
respectively where σ is standard deviation.
TABLE 18-1: PIN CAPACITANCE PER PACKAGE TYPE
Pin Name
40-pin DIP
Typical Capacitance (pF)
44-pin PLCC
44-pin MQFP
All pins, except MCLR,
10
10
10
VDD, and VSS
MCLR pin
20
20
20
FIGURE 18-1: TYPICAL RC OSCILLATOR FREQUENCY vs. TEMPERATURE
FOSC
FOSC (25°C)
Frequency normalized to +25°C
1.10
Rext ≥ 10 kΩ
1.08
Cext = 100 pF
1.06
44-pin TQFP
10
20
1.04
1.02
1.00
0.98
VDD = 5.5V
0.96
0.94
0.92
VDD = 3.5V
0.90
0
10
20 25 30
40
50
60
70
T(°C)
© 1996 Microchip Technology Inc.
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DS30412C-page 163