E0C63256
● Oscillation Characteristics
Oscillation characteristics change depending on conditions (board pattern, components used, etc.). Use the following char-
acteristics as reference values. In particular, when a ceramic oscillator or crystal oscillator is used, use the oscillator
manufacturer’s recommended values for constants such as capacitance and resistance.
Crystal Oscillation Circuit
(Unless otherwise specified: VDD=2.7 to 5.5V, VSS=0V, Ta=-20 to 85°C, Crystal oscillator: CA301 4.194304MHz , R
f
=1MΩ, CG=CD=15pF)
Characteristic
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
Built-in gate capacitance
Built-in drain capacitance
Frequency/IC deviation
Frequency/supply voltage
deviation
Symbol
Vsta
Condition
Min.
2.7
Typ.
Max.
Unit Note
V
t
sta
20
mS
V
1
Vstp
2.7
-10
C
C
G
D
16
13
pF
pF
ppm
ppm
/V
∂f/∂IC
∂f/∂V
10
1
Permitted leak resistance
Rleak Between OSC1 and VSS
200
MΩ
CA301 4.194304MHz: made by Seiko Epson
Note) 1. The crystal oscillation start time varies according to the crystal oscillator, C
G
and C
D
to be used.
Ceramic Oscillation Circuit
(Unless otherwise specified: VDD=2.7 to 5.5V, VSS=0V, Ta=-20 to 85°C, Ceramic oscillator: CSA 4.00MG , R
f
=1MΩ, CG=CD=30pF)
Characteristic
Oscillation start voltage
Oscillation start time
Symbol
Vsta
Condition
Min.
2.7
Typ.
Max.
Unit Note
V
mS
V
t
sta
5
Oscillation stop voltage
Vstp
2.7
CSA 4.00MG: made by Murata Mfg. Co.
CR Oscillation Circuit
(Unless otherwise specified: VDD=2.7 to 5.5V, VSS=0V, Ta=-20 to 85°C)
Characteristic
Oscillation start voltage
Oscillation start time
Oscillation stop voltage
Frequency/IC deviation
Symbol
Vsta
Condition
Min.
2.7
Typ.
Max.
Unit Note
V
mS
V
t
sta
1
Vstp
∂f/∂IC
2.7
-25
RCR = constant
25
%
● Characteristic Curves (reference value)
Output Current Characteristics
• High level output current (Pxx, Rxx, BZ)
• Low level output current (Pxx, Rxx, BZ)
Ta = 85˚C, Max. value
Ta = 85˚C, Min. value
V
DD–VOH [V]
1.0
0.8
0.6 0.4
0.2
0.0
14
12
10
8
0
-1
-2
-3
-4
-5
-6
-7
-8
VDD = 4.5 V
VDD = 2.7 V
V
V
DD = 2.7 V
6
4
2
DD = 4.5 V
0
0.0
0.2
0.4
0.6
0.8
1.0
VOL [V]
9
SEIKO [ SEIKO EPSON CORPORATION ]
