CF5016 Datasheet, PDF (5/8 Pages) Nippon Precision Circuits Inc – 1.8V Operation Fundamental Frequency Crystal Oscillator Module ICs

CF5016 series
Switching Characteristics
V_DD = 1.6 to 2.0V, V_SS = 0V, Ta = −40 to +85°C unless otherwise noted.
Parameter
Symbol
Condition
Rating
Unit
min
typ
max
Output rise time
Output fall time
t_{r1 Measurement cct 3, load cct 1,}
t_r2
0.2V_DD to 0.8V_DD
t_{f1 Measurement cct 3, load cct 1,}
t_f2
0.8V_DD to 0.2V_DD
Duty1
C_L = 15pF
C_L = 30pF
C_L = 15pF
C_L = 30pF
C_L = 15pF
f = 45MHz
–
2.5
5.0
ns
–
4.0
8.0
–
2.5
5.0
ns
–
4.0
8.0
45
–
55
%
Output duty cycle¹
Output disable delay time²
Output enable delay time²
Duty2
Duty3
t_PLZ
t_PZL
Measurement cct 3, load cct 1,
V_DD = 1.8V, Ta = 25°C
C_L = 15pF
f = 50MHz
C_L = 30pF
f = 30MHz
Measurement cct 6, load cct 1, V_DD = 1.8V, Ta = 25°C,
C_L = 15pF
40
–
60
%
45
–
55
%
–
–
200
ns
–
–
200
ns
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
L Ca R
f [MHz]
30
40
50
R [Ω]
5.26
8.24
16.12
L [mH]
2.82
5.72
6.88
Ca [fF]
9.99
2.77
1.43
Cb [pF]
2.68
2.22
1.18
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
Any f_O, f_O/2, f_O/4, f_O/8 or f_O/16 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