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| MC68HC908JL3E Datasheet, PDF (202/226 Pages) Motorola, Inc – Microcontrollers | |||
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Electrical Specifications
18.8 5V Oscillator Characteristics
Table 18-6. Oscillator Component Specifications (5V)
Characteristic
Symbol
Crystal frequency, XTALCLK
fOSCXCLK
RC oscillator frequency, RCCLK
fRCCLK
External clock
reference frequency(1)
fOSCXCLK
Crystal load capacitance(2)
CL
Crystal fixed capacitance(2)
C1
Crystal tuning capacitance(2)
C2
Feedback bias resistor
RB
Series resistor(2), (3)
RS
RC oscillator external R
REXT
RC oscillator external C
CEXT
NOTES:
1. No more than 10% duty cycle deviation from 50%.
2. Consult crystal vendor data sheet.
3. Not required for high frequency crystals.
Min
Typ
Max
â
10
32
2
10
12
dc
â
32
â
â
â
â
2 Ã CL
â
â
2 Ã CL
â
â
10 Mâ¦
â
â
â
â
See Figure 18-1
â
10
â
Unit
MHz
MHz
MHz
pF
14
12
10
8
6
4
2
0
0
CEXT = 10 pF
5V @ 25°C
MCU
OSC1
VDD
REXT
CEXT
10
20
30
40
50
Resistor, REXT (kâ¦)
Figure 18-1. RC vs. Frequency (5V @25°C)
Technical Data
202
MC68H(R)C908JL3E/JK3E/JK1E â Rev. 2.0
Electrical Specifications
MOTOROLA
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