Surface Acoustic Wave Filters
PAFC Series
FEATURES
• Small and low profile
• Ceramic package type
• Flat pass band characteristics
• Low insertion loss
• Circuit simplification
APPLICATIONS
• PHS
HOW TO ORDER
PAFC 248 B
DIMENSIONS
millimeters (inches)
Type
Center Frequency
0.8 (0.031)
0.7
(0.028)
3.8 (0.150)
Series
3
3
3
1.27
(0.050)
3
TEST CIRCUIT
3.5pF
Input Output
4.5pF
2
1
1.27
(0.050)
1
2
3
3
3
3
50Ω
1.0pF
3.8 (0.150)
68nH
68nH
1.0pF
50Ω
1.3 (0.051)
➀
➁
➂
INPUT
OUTPUT
GROUND
SPECIFICATIONS
Part Number
PAFC248B
PAFC243B
Normal Center
Frequency
(
Fn)
Insertion
Loss
Pass Band
Width
(at 3dB)
Stop Band Attenuation
fn±600kHz
fn±1.2kHz
fn±faMHz*
Ripple
(fn±110kHz)
1.5dB max..
1.5dB max..
Group Delay
Time
(fn±110kHz)
1.2µs max.
1.2µs max.
Operating
Temperature
-10 to 60°C
-10 to 60°C
248.45MHz
243.95MHz
4.0dB max. ±130kHz min.
4.0dB max. ±130kHz min.
30dB min. 40dB min.
30dB min. 40dB min.
60dB min.
60dB min.
RECOMMENDED LAND PATTERN
mm (inches)
TAPING DIMENSION
mm (inches)
A
E
B
φH
J
L
G
IN
G
0.9 (0.035)
C
D
K
φF
G
M
0.37 (0.015)
OUT
0.9 (0.035)
0.37 (0.015)
G
G
0.9 (0.035)
1.3
(0.051)
1.8
(0.071)
1.3
(0.051)
G: GROUND
Code
A
4.00
B
2.00
C
12.0
D
5.50
E
1.75
F
1.55
G
8.00
H
1.55
J
4.30
K
4.30
L
0.30
M
2.05
Dim.
(0.157) (0.079) (0.472) (0.217) (0.069) (0.061) (0.315) (0.061) (0.169) (0.169) (0.012) (0.081)
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Surface Acoustic Wave Filters
PAFC Series
RECOMMENDED TEMPERATURE PROFILE IR REFLOW
Temp(°C)
250
Peak Temp
235°C±5°C
2 to 3sec
200
150
150°C±10°C
100
200°C
40 sec max
50
0 to 60sec
0
Time
60 to 120sec
CHARACTERISTICS
PAFC248A Pass Band Characteristics
0
10
Attenuation(-dB)
20
30
40
50
60
70
80
90
247.45
248.45
Frequency(MHz)
249.45
80
90
228.45
238.45
248.45
Frequency(MHz)
258.45
268.45
Group delay time(1.0µsec/Div)
PAFC248A Spurious Characteristics
0
10
Attenuation(-dB)
Attenuation(-dB)
20
30
40
50
60
70
PAFC243B Pass Band Characteristics
0
10
Attenuation(-dB)
20
30
40
50
60
70
80
90
242.95
243.95
Frequency(MHz)
244.95
Group delay time(1.0µsec/Div)
PAFC243B Spurious Characteristics
0
10
20
30
40
50
60
70
80
90
223.95
233.95
243.95
Frequency(MHz)
253.95
263.95
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