Monolithic Crystal Filters
UM SERIES 2POLE , 4POLE
■ Features
●
Excellent frequency stability
●
High precision and high reliability
UM-1
UM-5
UM-4
Pb-Free
RoHS Compliant
■ Standard Specification
Type
Model
Pole Number of elements)
（
Overtone Order
Nominal Frequency
Pass Bandwidth
Stop Bandwidth
Ripple
Insertion Loss
Guaranteed Attenuation
Terminating Impedance
Operating Temperature Range
D21407A
2(1)
Fundamental
21.400 MHz
±3.75 Hz min./3dB
½
±14 Hz max./18dB
½
1dB max.
2.5dB max.
40dB min.
850Ω//5pF
■ Applications
●
Radio communications
D21409B
4(2)
Fundamental
21.400 MHz
±4.5 Hz min./3dB
½
±15 Hz max./40dB
½
1dB max.
2.5dB max.
80dB min.
1000Ω//4pF Cc=13.5½F
UM-5 (UM-1)
D21407B
4(2)
Fundamental
21.400 MHz
±3.75 Hz min./3dB
½
±14 Hz max./40dB
½
1dB max.
2.5dB max.
80dB min.
850Ω//5pF Cc=16½F
D21409A
2(1)
Fundamental
21.400 MHz
±4.5 Hz min./3dB
½
±12.5 Hz max./14dB
½
1dB max.
2dB max.
40dB min.
1500Ω//4pF
D21412A
2(1)
Fundamental
21.400 MHz
±6.0 Hz min./3dB
½
±20 Hz max./15dB
½
1dB max.
2dB max.
40dB min.
1200Ω//2.5pF
-20∼+70℃
Type
Model
D21412B
Pole Number of elements)
（
4(2)
Overtone Order
Fundamental
Nominal Frequency
21.400 MHz
Pass Bandwidth
±6.0 Hz min./3dB
½
Stop Bandwidth ±20 Hz max./40dB
½
Ripple
1½B max.
Insertion Loss
2.5½B max.
Guaranteed Attenuation
80½B min.
Terminating Impedance
1200Ω//2.5pF Cc=10.5½F
Operating Temperature Range
D21415A
2(1)
Fundamental
21.400 MHz
±7.5 Hz min./3dB
½
±25 Hz max./18dB
½
1½B max.
2½B max.
40½B min.
1500Ω//3pF
UM-5 (UM-1)
D21415B
4(2)
Fundamental
21.400 MHz
±7.5 Hz min./3dB
½
±25 Hz max./40dB
½
1½B max.
2.5½B max.
80½B min.
1500Ω//2pF Cc=8½F
D21430A
2(1)
Fundamental
21.400 MHz
±15 Hz min./3dB
½
±45 Hz max./15dB
½
1½Bmax.
2½B max.
40½B min.
3000Ω//0.5pF
D21430B
4(2)
Fundamental
21.400 MHz
±15 Hz min./3dB
½
±50 Hz max./40dB
½
1½B max.
2.5½B max.
80½B min.
3300Ω//0.5pF Cc=3½F
-20∼+70℃
Type
Model
D45007A
Pole Number of elements)
（
2(1)
Overtone Order
Fundamental
Nominal Frequency
45.000 MHz
Pass Bandwidth ±3.75 Hz min./3dB
½
Stop Bandwidth ±12.5 Hz max./10dB
½
Ripple
1½B max.
Insertion Loss
3½B max.
Guaranteed Attenuation
40½B min.
510Ω//5.5pF
Terminating Impedance
Operating Temperature Range
D45007B
4(2)
Fundamental
45.000 MHz
±3.75 Hz min./3dB
½
±12.5 Hz max./25dB
½
1½B max.
4½B max.
80½B min.
350Ω//5.5pF Cc=20½F
UM-4
D45015A
2(1)
Fundamental
45.000 MHz
±7.5 Hz min./3dB
½
±25 Hz max./14dB
½
1½B max.
2.5½B max.
40½B min.
550Ω//3pF
D45015B
4(2)
Fundamental
45.000 MHz
±7.5 Hz min./3dB
½
±25 Hz max./40dB
½
1½B max.
3½B max.
80½B min.
650Ω//3pF Cc=10½F
D45030B
4(2)
Fundamental
45.000 MHz
±15 Hz min./3dB
½
±40 Hz max./30dB
½
1½B max.
3½B max.
80½B min.
800Ω//1.5pF Cc=7½F
-20∼+70℃
Consult our sales represntative for other specificeations
■Measurement circuit
2POLE
MCF
■ Dimensions[mm]
A
B
R
50Ω
Ct
S.G
#1
#2
#3
Ct
R
50Ω
L.M
Model
Logo
21415A
KDS 1C
C
PinNo.
#1
#2
GND.
OUTPUT/INPUT
Signal
INPUT/OUTPUT
#3
Lot No.
Rt//Ct：Terminating lmpedance
（Rt=R+50Ω）
#1
#2 #3
F
■Measurement Circuit
4POLE
Pair Mark
MCF
MCF
#3 #1
#2
#2
Cc
Ct
L.M
R
#1
Ct
#3
R
50Ω
50Ω
S.G
Rt//Ct：Terminating lmpedance Rt=R+50Ω） Cc : Coupling capacitance
（
A
B
C
D
E
F
UM-1
7.8±0.2
3.0±0.2
7.8±0.2
20±1
φ0.35±0.05
3.75±0.2
UM-4
7.8±0.2
3.0±0.2
4.5±0.2
20±1
φ0.35±0.05
3.75±0.2
UM-5
7.8±0.2
3.0±0.2
5.8±0.2
20±1
φ0.35±0.05
3.75±0.2
D
E
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