KEC KF881U Datasheet
2002. 10. 30 1/5
SAW FILTER
TECHNICAL DATA
KF881U
SPECIFICATIONS FOR SAW FILTER
Revision No : 3
Band pass filters for RX of AMPS/TDMA/CDMA.
High stability and reliability with good
performance and no adjustment.
Wide and sharp pass band characteristics.
Low insertion loss and deep stop band
attenuation for interference.
MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS (Ta=-30 to 85 )
ITEMS SYMBOL TEST CONDITION MIN.
TYP.(25 )
MAX. UNIT
Nominal Center Frequency fo - - 881.5 - MHz
Bandwidth
BW
3dB
-
fO12.5
- - MHz
Insertion Loss
IL
PASS
fO12.5MHz
- 3.0 3.5 dB
Ripple Level
A
RIP
fO12.5MHz
- 0.8 1.6 dB
Rejection Level
IL
STOP
DC 779MHz
50 55 -
dB
779 849MHz
45 48 -
914 970MHz
20 24 -
970 1049MHz
50 52
1049 2000MHz
40 43 -
Voltage Standing Wave Ratio VSWR
fO12.5MHz
- 1.5 2.0 -
Input/Output Impedance
ZI(ZO)
- -
50
- -
ITEM SYMBOL RATING UNIT
Input Signal Level
IS
max
+10 dBm
DC Permissive Voltage
V
DC
5 V
Operating Temperature Range
T
opr
-30 +85
Storage Temperature Range
T
stg
-40 +85
C
DIM MILLIMETERS
PIN NO
_
A
3.0 0.1
+
_
B
3.0 0.1
+
_
CG1.15 0.12
+
D
1.50 TYP.
E
0.60 TYP.
F
0.85 TYP.
1.20 TYP.
FUNCTION
1
3
GROUND
6
4
2
SIGNAL
5
SIGNAL
B
A
D
4
3
GG
5
2
1
E
6
F
SC-33
MARKING
K H D
Lot No.
2002. 10. 30 2/5
KF881U
Revision No : 3
RS, RL: 50 (Internal Impedance of Source and Load)
R : 0
ZI(ZO)=RS(RL)+R
MEASUREMENT CIRCUIT
RS, RL: 50 (Internal Impedance of Source and Load)
R : 0
ZI(ZO)=RS(RL)+R
REFERENCE LEVEL TEST CIRCUIT
TEST CIRCUIT
Z
I
Z
O
R
s
SSG
0dBm
RR
DET
R
L
Z
I
Z
O
SSG
4
RR
s
3
5
2
6
1
2 : INPUT 1 , 3 , 4 , 6 : GROUND 5 : OUTPUT
R
DET
R
L
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