LC868364A
20/29
Recommended Oscillation Circuit and Characteristics
The oscillation circuit characteristics in the table below are based on the following conditions:
Recommended circuit parameters are verified by an oscillator manufacturer using a Sanyo provided oscillation evaluation
board.
The characteristics are the results of the evaluation with the recommended circuit parameters connected externally.
Recommended Ceramic Oscillation Circuit and Characteristics (Ta = -30
°
C to +70
°
C)
Recommended Circuit
Parameter
C1
C2
30pF
30pF 0k
(30pF) (30pF) 0k
22pF
22pF 0k
30pF
30pF 0k
(15pF) (15pF) 0k
33pF
33pF 0k
30pF
30pF 0k
(15pF) (15pF) 0k
33pF
33pF 0k
30pF
30pF 0k
(30pF) (30pF) 0k
33pF
33pF 0k
Frequency
Manufacturer
Oscillator
Rd1
Operating
supply Voltage
Range
Oscillation
Stabilizing Time
Period (typ.) *
Notes
CSA12.0MTZ
CST12.0MTW
KBR-12.0M
CSA6.00MG
CSTS0600MG03
KBR-6.0MSA
CSA4.00MG
CSTS0400MG03
KBR-4.0MSA
CSA3.00MG
CST3.00MGW
KBR-3.0MS
3.3 to 6.5V
3.3 to 6.5V
3.3 to 6.5V
2.8 to 6.5V
2.4 to 6.5V
2.4 to 6.5V
2.7 to 6.5V
2.4 to 6.5V
2.4 to 6.5V
2.4 to 6.5V
2.4 to 6.5V
2.4 to 6.5V
0.06ms
0.06ms
0.04ms
0.08ms
0.04ms
0.05ms
0.05ms
0.03ms
0.04ms
0.06ms
0.06ms
0.05ms
MURATA
built-in capacitor type
built-in capacitor type
built-in capacitor type
built-in capacitor type
12MHz
KYOCERA
MURATA
6MHz
KYOCERA
MURATA
4MHz
KYOCERA
MURATA
3MHz
KYOCERA
Recommended Crystal Oscillation Circuit and Characteristics (Ta = -30
°
C to +70
°
C)
Recommended Circuit
Parameter
C3
C4
12pF
12pF
12pF
12pF
Frequency
Manufacturer
Oscillator
Rd2
330k
330k
Operating supply
Voltage Range
Oscillation
Stabilizing Time
Period (typ.) *
Notes
Seiko Instruments
Seiko Epson
VT-200
2.2 to 6.5V
2.2 to 6.5V
0.6s
0.8s
32.768kHz
C-002RX/MC-306
* The oscillation stabilizing time period is the time until the oscillation becomes stable after the VDD becomes higher than the
minimum operating voltage.
Notes: Since the circuit pattern affects the oscillation frequency, place the oscillation-related parts as close to the
oscillation pins as possible with the shortest possible pattern length.
If you use other oscillators herein, we provide no guarantee for the characteristics.
The oscillation circuit characteristics may differ by applications. For further assistance, please contact with the oscillator
manufacturer with the following notes in your mind.
Since the oscillation frequency precision is affected by wiring capacity of the application board, etc., adjust the oscillation
frequency on the production board.
The above oscillation frequency and the operating supply voltage range are based on the operating temperature of -30°C to
+70°C. For the use with the temperature outside of the range herein, or in the applications requiring high reliability such
as car products, please consult with oscillator manufacturer.
Since the oscillation circuit characteristics are affected by the noise, wiring capacity, etc., refer to the following notices.
The distance between the clock I/O terminal and external parts should be as short as possible.
The capacitors’ VSS should be allocated close to the microcontroller’s GND terminal and be away from other GND.
The signal lines with rapid state changes or the signal line with large amplitude such as middle withstand voltage port or
LCD driver output should be allocated away from the clock oscillation circuit.
The signal lines with large current should be allocated away from the oscillation circuit.