SAW FILTERS FOR CORDLESS PHONE
This is a Pass Band filter used for the receiver/transmitter circuit of the low-power cordless telephone.
s
Features
8
Low insertion loss
8
Excellent guaranteed attenuation
s
Specification
Character-
istics
Model
254F05
380F03A
433SK04
Pass
Nominal
Bandwidth
Frequency
(MHz)
(dB) (MHz)
254.41
380.76
433.92
1
1
4 (
4
1)
±0.6
±0.6
±0.87
Attenuation
Bandwidth
(dB)
45
45
–
Ripple Inser-
tion
Loss
(MHz) (dB)
(dB)
–25
–25
–
1.0
1.0
2.0
3.0
3.0
4.0(
4
2)
Guaranteed
Attenuation
Bandwidth
(dB)
55
55
20
10
(MHz)
+40
–30
+40
–30
+16.08~24.08
–6~+9.92
Terminating
Impedance
(Ω)
170/ tuning
150/ tuning
50/ tuning
Operating
Temp. Range
(˚C)
0~+50
0~+50
–20~+60
Type
D-518B
D-518B
NS9148SB
(D-543)
∗
[Type name] In (
4
1
From through level.
4
2
f
0
±0.87MHz max
) which is, it is previous name.
Model : 254F05
Model : 254F05
(dB)
Attenuation (dB)
–8
–6
–4
–2
0
+2
+4
+6
+8
+10
–100
–80
–60
–40
–20
0
10
20
30
40
50
60
70
80
90
+20
+40
+60
+80
+100
Attenuation 1dB/div
0
1
2
3
4
5
6
–10
Frequency
(MHz)
Frequency
(MHz)
D-518B
(mm)
5.0min 3.5max
NS9148SB (D-543)
9.1
±0.3
4.8
±0.3
(mm)
11.4max
7.6±0.2
7.1
1.8max
2.54
4.8max
1
2
Index
Mark (*1)
3
4
Index
Mark (*1)
PAD NO. PAD CONNECTION
1 2 3
4
5
6 7 8
9
10
GND.
GND.
OUTPUT/INPUT
GND.
GND.
INPUT/OUTPUT
9
5
8
7
6
2-ø0.45GND
2-ø0.45
0.8
2.8
+
6!2.54
10
SAW DEVICES
215
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