WF5027 series
AC Characteristics
For Fundamental Oscillator (5027×1 to 5027×7, 5027×P to 5027×W)
= 1.60 to 3.63V, V = 0V, Ta = −40 to +85°C unless otherwise noted.
V
DD
SS
Rating
typ
2.0
3.0
2.0
3.0
50
Parameter
Symbol
Condition
Unit
min
–
max
4.5
5.0
4.5
5.0
55
t
V
V
V
V
= 2.25 to 3.36V
= 1.60 to 2.25V
= 2.25 to 3.36V
= 1.60 to 2.25V
ns
ns
ns
ns
%
r1
DD
DD
DD
DD
Measurement cct 1, C = 15pF,
L
Output rise time
Output fall time
0.1V to 0.9V
DD
DD
t
–
r2
t
–
f1
Measurement cct 1, C = 15pF,
L
0.9V to 0.1V
DD
DD
t
–
f2
Output duty cycle
Duty
Measurement cct 1, Ta = 25°C, C = 15pF
45
–
L
Output disable delay time
t
Measurement cct 2, Ta = 25°C, C ≤ 15pF
–
50
µs
OD
L
For 3rd Overtone Oscillator (5027×A to 5027×D)
= 1.60 to 3.63V, V = 0V, Ta = −40 to +85°C unless otherwise noted.
V
DD
SS
Rating
typ
1.2
1.6
1.2
1.6
50
Parameter
Symbol
Condition
Unit
min
–
max
3.0
4.0
3.0
4.0
55
t
V
V
V
V
= 2.25 to 3.36V
= 1.60 to 2.25V
= 2.25 to 3.36V
= 1.60 to 2.25V
ns
ns
ns
ns
%
r1
DD
DD
DD
DD
Measurement cct 1, C = 15pF,
L
Output rise time
Output fall time
0.1V to 0.9V
DD
DD
t
–
r2
t
–
f1
Measurement cct 1, C = 15pF,
L
0.9V to 0.1V
DD
DD
t
–
f2
Output duty cycle
Duty
Measurement cct 1, Ta = 25°C, C = 15pF
45
–
L
Output disable delay time
t
Measurement cct 2, Ta = 25°C, C ≤ 15pF
–
50
µs
OD
L
Timing chart
Q
0.9VDD
0.9VDD
DUTY measurement
voltage (0.5VDD)
TW
0.1VDD
0.1VDD
T
DUTY= TW/ T 100 (%)
tr
tf
Figure 1. Output switching waveform
VIH
INHN
VIL
tOD
tSTR
0.1V
Q
Normal
operation
Output
stopped
Normal
operation
Hi-Z*
When INHN goes HIGH to LOW, the Q output goes HIGH once and then becomes high impedance.
When INHN goes LOW to HIGH, the Q output goes from high impedance to normal output operation when the oscillation starts (oscillation is detected).
*) The high-impedance interval in the figure is shown as a LOW level due to the 1kΩ pull-down resistor connected to the Q pin (see "Measurement circuit
2" in the "Measurement Circuits" section).
Figure 2. Output disable and oscillation start timing chart
SEIKO NPC CORPORATION —12
NPC [ NIPPON PRECISION CIRCUITS INC ]
