CF5018 series
Switching Characteristics
V
DD
= 2.25 to 2.75V, V
SS
= 0V, Ta =
−
40 to +85
°
C unless otherwise noted.
Rating
Parameter
Output rise time
Output fall time
Output duty cycle
1
Output disable delay time
2
Output enable delay time
2
Symbol
t
r
t
f
Duty
t
PLZ
t
PZL
Condition
min
Measurement cct 3, load cct 1, 0.1V
DD
to 0.9V
DD
, C
L
= 30pF
Measurement cct 3, load cct 1, 0.9V
DD
to 0.1V
DD
, C
L
= 30pF
Measurement cct 3, load cct 1, V
DD
= 2.5V, Ta = 25
°
C,
f = 80MHz , C
L
= 30pF
Measurement cct 6, load cct 1, V
DD
= 2.5V, Ta = 25
°
C,
C
L
= 15pF
–
–
45
–
–
typ
3
3
–
–
–
max
6
6
55
100
100
ns
ns
%
ns
ns
Unit
1. The duty cycle characteristic is checked the sample chips of each production lot.
2. Oscillator stop function is built-in. When INHN goes LOW, normal output stops. When INHN goes HIGH, normal output is not resumed until after the
oscillator start-up time has elapsed.
Current consumption and Output waveform with NPC’s standard crystal
Cb
f [MHz]
30
40
50
60
70
85
R [Ω]
18.62
20.53
22.17
15.37
25.42
20.58
L [mH]
16.24
11.34
7.40
3.83
4.18
5.22
Ca [fF]
1.733
1.396
1.370
1.836
1.254
0.671
Cb [pF]
5.337
3.989
4.105
5.191
5.170
4.965
L
Ca
R
FUNCTIONAL DESCRIPTION
Standby Function
When INHN goes LOW, the oscillator stops and the oscillator output on Q becomes high impedance.
INHN
HIGH (or open)
LOW
Q
f
O
output frequency
High impedance
Oscillator
Normal operation
Stopped
Power-saving Pull-up Resistor
The INHN pull-up resistance changes in response to the input level (HIGH or LOW). When INHN goes LOW
(standby state), the pull-up resistance becomes large to reduce the current consumption during standby.
SEIKO NPC CORPORATION —5
NPC [ NIPPON PRECISION CIRCUITS INC ]
