MC68HC908LJ24 Datasheet, PDF (442/464 Pages) Motorola, Inc – Microcontrollers

Electrical Specifications
24.11 3.3V Oscillator Characteristics
Table 24-9. 3.3V Oscillator Specifications
Characteristic
Internal oscillator clock frequency
Symbol
Min
f_ICLK
Typ
47 k⁽¹⁾
Max Unit
Hz
External reference clock to OSC1⁽²⁾
f_OSC
dc
—
16 M
Hz
Crystal reference frequency⁽³⁾
f_XCLK
—
32.768 k
4.9152M Hz
Crystal load capacitance⁽⁴⁾
Crystal fixed capacitance
Crystal tuning capacitance
Feedback bias resistor
Series resistor⁽⁵⁾
C_L
—
—
—
C₁
—
2 × C_L (27p)
—
F
C₂
—
2 × C_L (33p)
—
F
R_B
—
20 M
—
Ω
R_S
—
100 k
—
Ω
Notes:
1. Typical value reflect average measurements at midpoint of voltage range, 25 ×C only. See Figure 24-1 for plot.
2. No more than 10% duty cycle deviation from 50%.
3. Fundamental mode crystals only.
4. Consult crystal manufacturer’s data.
5. Not Required for high frequency crystals.
65
– 40 °C
60
55
50
+ 25 °C
45
40
+ 85 °C
35
2
3
4
5
6
Supply Voltage, V_DD (V)
Figure 24-1. Typical Internal Oscillator Frequency
Data Sheet
442
Electrical Specifications
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor