MC908QT1 FREESCALE [Freescale Semiconductor, Inc], MC908QT1 Datasheet - Page 154

• Manufacturer Part Number: MC908QT1
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Electrical Specifications
16.8 5-V Oscillator Characteristics
154
Internal oscillator frequency
Deviation from trimmed Internal oscillator
Crystal frequency, XTALCLK
External RC oscillator frequency, RCCLK
External clock reference frequency
Crystal load capacitance
Crystal fixed capacitance
Crystal tuning capacitance
Feedback bias resistor
RC oscillator external resistor
Crystal series damping resistor
1. Bus frequency, f
2. Deviation values assumes trimming @25°C and midpoint of voltage range.
3. Values are based on characterization results, not tested in production.
4. No more than 10% duty cycle deviation from 50%.
5. Consult crystal vendor data sheet.
12.8 MHz, fixed voltage, fixed temp
12.8 MHz, V
12.8 MHz, V
f
f
f
OSCXCLK
OSCXCLK
OSCXCLK
= 1 MHz
= 4 MHz
= > 8 MHz
DD
DD
± 10%, 0 to 70°C
± 10%, –40 to 125°C
Characteristic
OP
14
12
10
8
6
4
2
0
, is oscillator frequency divided by 4.
0
(5)
(3)
(3)
(1)
(1)
Figure 16-4. RC versus Frequency (5 Volts @ 25°C)
(1) (4)
10
MC68HC908QY/QT Family Data Sheet, Rev. 5
(1)
(2)(3)
20
f
f
Symbol
OSCXCLK
OSCXCLK
ACC
f
f
INTCLK
RCCLK
R
R
R
C
C
C
EXT
R
L
1
2
B
S
EXT
INT
30
(k Ω )
Min
0.5
—
—
—
—
dc
—
—
—
—
—
—
1
2
40
See
Figure 16-4
2 x C
2 x C
± 0.4
12.8
Typ
± 2
20
20
10
—
—
—
—
1
0
50
L
L
5 V 25°C
Freescale Semiconductor
Max
± 5
24
12
32
10
—
—
—
—
—
—
—
—
—
60
MHz
MHz
MHz
MHz
Unit
MΩ
kΩ
pF
—
—
—
%