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8.7 Oscillation Characteristics
Oscillation characteristics change depending on conditions (board pattern, components used, etc.). Use the following
characteristics as reference values. In particular, when a ceramic or crystal oscillator is used, use the oscillator
manufacturer recommended values for constants such as capacitance and resistance.
OSC1 crystal oscillation
(Unless otherwise specified: crystal=Q11C02RX
Item
Operating temperature
#1 Q11C02RX: Crystal resonator made by Seiko Epson
#2 "C
=C
=15pF" includes board capacitance.
G1
D1
Item
Oscillation start time
External gate/drain capacitance
Frequency/IC deviation
Frequency/power voltage deviation f/ V
Frequency adjustment range
#1 Q11C02RX: Crystal resonator made by Seiko Epson
#2 "C
=C
=15pF" includes board capacitance.
G1
D1
OSC3 crystal oscillation
Note: A "crystal resonator that uses a fundamental" should be used for the OSC3 crystal oscillation circuit.
Item
Oscillation start time
#1 Q22MA306: Crystal resonator made by Seiko Epson
#2 "C
=C
=15pF" includes board capacitance.
G1
D1
OSC3 ceramic oscillation
Item
Oscillation start time
note)
No.
Ceramic
oscillator
1
CST25.00MXW0H1
2
CST33.00MXZ040
1 This oscillator has a tendency to rise to the frequency of 0.3%.
S1C33210 PRODUCT PART
Symbol
Condition
Ta
V
=2.7V to 3.6V
DD
(Unless otherwise specified: V
Symbol
Condition
t
STA1
C
C
C
=C
,
G1,
D1
G1
D1
including board capacitance
f/ IC
f/ C
C
=C
= 5 to 25pF
G
G
D1
(Unless otherwise specified: V
Symbol
Condition
t
V
=3.3V
STA3
DD
Symbol
Condition
t
10MHz ceramic oscillator
STA3
16MHz ceramic oscillator
20MHz ceramic oscillator
25MHz ceramic oscillator
33MHz ceramic oscillator
Recommended constants
CG2 (pF) CD2 (pF) Rf2 (M )
5
5
1
Open
Open
1
EPSON
8 ELECTRICAL CHARACTERISTICS
#1
32.768kHz, Rf
=20M , C
1
Min.
Typ.
-40
=3.3V, V
=0V, crystal=Q11C02RX
DD
SS
Rf
=20M , C
1
Min.
Typ.
5
-10
-10
50
=0V, crystal=Q22MA306
SS
Rf
=1M , C
2
Min.
Typ.
(Unless otherwise specified: V
Min.
Typ.
Power voltage
range (V)
2.7 to 3.6
(Murata Mfg. corporation)
2.7 to 3.6
(Murata Mfg. corporation)
#2
=C
=15pF
G1
D1
Max.
Unit
85
C
#1
32.768kHz,
#2
=C
=15pF
, Ta=25 C)
G1
D1
Max.
Unit
3
sec
25
pF
10
ppm
10
ppm/V
ppm
#1
33.8688MHz,
#2
=C
=15pF
, Ta=25 C)
G1
D1
Max.
Unit
10
ms
=0V, Ta=25 C)
SS
Max.
Unit
10
ms
1
10
ms
2
10
ms
3
5
ms
4
5
ms
5
Remarks
(Manufacturer)
A-85
)
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