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CHAPTER 9: ELECTRICAL CHARACTERISTICS
9.5 Oscillation Characteristics
The oscillation characteristics change depending on the conditions (components used, board pattern,
etc.). Use the following characteristics as reference values.
OSC1 crystal oscillation circuit
Unless otherwise specified:
V
=3.0V, V
=0V, f
DD
SS
OSC1
Item
Oscillation start voltage
Oscillation stop voltage
Built-in capacitance (drain)
Frequency/voltage deviation
Frequency/IC deviation
Frequency adjustment range
Harmonic oscillation start voltage
Permitted leak resistance
OSC3 ceramic oscillation circuit
Unless otherwise specified:
V
=3.0V, V
=0V, Ceramic oscillator: 4MHz, C
DD
SS
Item
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
OSC3 CR oscillation circuit
Unless otherwise specified:
V
=3.0V, V
=0V, R
=91kΩ, Ta=25°C
DD
SS
CR
Item
Oscillation frequency dispersion
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
OSC3 CR oscillation frequency-resistance characteristic
The oscillation characteristics change depending on the conditions (components used, board pattern,
etc.). Use the following characteristics as reference values and evaluate the characteristics on the actual
product.
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
70
132
=32.768kHz, C
=25pF, C
=built-in, Ta=-20 to 70°C
G
D
Symbol
t
sta≤3sec ( V
Vsta
DD
t
stp≤10sec ( V
Vstp
DD
C
Including the parasitic capacitance inside the IC (in chip)
D
∂f/∂V
V
=2.7 to 5.5V
DD
∂f/∂IC
∂f/∂C
C
=5 to 25pF
G
G
=5pF ( V
)
V
C
hho
G
DD
R
Between OSC1 and V
leak
=C
GC
Symbol
Vsta
Normal mode (V
t
sta
V
=2.7 to 5.5V
DD
Vstp
Normal mode (V
Symbol
f
OSC3
Vsta
Normal mode (V
t
sta
V
=2.7 to 5.5V
DD
Vstp
Normal mode (V
80
90
100
Resistor value for CR oscillation R
Condition
)
)
, V
DD
SS
=100pF, Ta=-20 to 70°C
DC
Condition
)
DD
)
DD
Condition
)
DD
)
DD
110
120
CR
EPSON
Min.
Typ.
2.7
2.7
18
-10
50
5.5
200
Min.
Typ.
2.7
2.7
Min.
Typ.
-30
1.8MHz
2.7
2.7
V
= 3.0 V
DD
V
= 0 V
SS
Ta = 25°C
Typ. value
130
140
[kΩ]
S1C6P366 TECHNICAL MANUAL
Max.
Unit
V
V
pF
5
ppm
10
ppm
ppm
V
MΩ
Max.
Unit
V
5
ms
V
Max.
Unit
30
%
V
3
ms
V
150
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