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