MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 216

• Manufacturer Part Number: MC68HC908QY2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Electrical Specifications
18.8 5-V Oscillator Characteristics
1. No more than 10% duty cycle deviation from 50%.
2. Consult crystal vendor data sheet.
3. Not required for high frequency crystals
216
Internal oscillator frequency
Crystal frequency, XTALCLK
RC oscillator frequency, RCCLK
External clock reference frequency
Crystal load capacitance
Crystal fixed capacitance
Crystal tuning capacitance
Feedback bias resistor
Series resistor
RC oscillator external resistor
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
14
12
10
8
6
4
2
0
0
(2), (3)
Characteristic
Figure 18-1. RC versus Frequency (5 Volts @ 25°C)
10
(2)
(2)
(2)
(1)
20
Resistor, R
Electrical Specifications
EXT
(k )
30
f
f
Symbol
OSCXCLK
OSCXCLK
f
f
INTCLK
RCCLK
R
R
R
C
C
C
EXT
B
S
L
1
2
40
5 V @ 25°C
Min
—
dc
—
—
—
—
—
1
2
See
50
Figure 18-1
2 x C
2 x C
12.8
Typ
10
—
—
—
—
—
V
L
L
DD
R
EXT
Max
—
32
12
32
—
—
—
—
—
MCU
OSC1
MOTOROLA
MHz
MHz
MHz
MHz
Unit
M
—
—
—
—
—