Temperature Compensated Crystal Oscillators(TCXO)
Surface Mount Type TCXO (LSI Type)
KT18B Series
Dimensions Test Circuit
Recommended Land Pattern
(Unit : mm)(Unit : mm)
Features
• Ultra-miniature SMD Type
(5.0x3.2x1.5mm)
• Reflow compatible
• AFC function available
• 2.3 to 3.5V drive available
• Frequency Stability
: ±2.0ppm at -30°C to +85°C
How to Order
Applications
• PDC, GSM, CDMA
Specifications
KT18B - D C V 30 - 19.680M - T
wqertyui
qType
wFrequency stability
tSupply Voltage
eLower operating temp
iPackaging
rUpper operating temp
yOption Code
uFrequency(MHz)
K ±5ppm
E ±2.5ppm
D ±2.0ppm
C −30°C
E −20°C
G −10°C
W 85°C
V 80°C
U 75°C
28 2.8V 30 3.0V
13.000 19.200 19.800
14.400 19.440 26.000
16.800 19.680
T Tape & Reel
4,000pcs/Reel
Item Symbol Conditions Min. Max. Units
Output Frequency Range
Frequency Stability
Storage Temp. Range
Operating Temp. Range
Aging
Voltage control range
Supply Voltage
Output Voltage
Current Consumption
Duty Ratio
Harmonics
FOUT 13 26 MHz
vs Temperature −2.0 +2.0
∆
f/fo vs Load −0.2 +0.2 ppm
vs Voltage −0.3 +0.3
TSTG −40 +85 °C
TOPR −30 +85 °C
∆
faging Per Year −1 1 ppm
∆
f/V Positive +/−8 +/−15 ppm
V
DD 2.3 3.5 Volt
Vout 10k ohm // 10pF 0.8 ----- Vp-p
I
DD ----- 2.0 mA
SYM @50% VDD 40 60 %
----- ----- - 5 d B c
1.01.0
2.95±0.15
#4pin #3pin
#1pin #2pin
1.3 1.3
Test circuit 2
(Harmonics & Frequency)
Test circuit 1
(Amplitude)
Oscilloscope
(100MHz)
CL include Probe Capacitance
POWER
SUPPLY
Vcc
A
V
12
43
VC-TCXO
10kΩ
±10%
Vcon
CL=10pF
±10%
Spectrum Analyzer
& Counter
FET
PROBE
CL include Probe Capacitance
POWER
SUPPLY
Vcc
A
V
12
43
VC-TCXO
10kΩ
±10%
Vcon
CL=10pF
±10%
Dimension:(mm)
(1.6)
0.7±0.1 1.5(MAX)
0.70±0.1
0.7±0.1
2.95±0.15
0.95±0.1
#1pin Marking
5.0±0.2
3.2±0.2
MARKING AREA
Pin Configuration
q Vcon
w GND
e OUTPUT
r +Vcc
qw
re
Pb Free
RoHS Conforming
5.0×3.2A
