RF Filters for Cellular Phones
Series/Type:
B7721
The following products presented in this data sheet are being withdrawn.
Ordering Code
B39941B7721C910
Substitute Product
B39941B9401K610
Date of Withdrawal
2007-09-21
Deadline Last
Orders
2007-12-31
Last Shipments
2008-03-31
For further information please contact your nearest EPCOS sales office, which will also support you in selecting a
suitable substitute. The addresses of our worldwide sales network are presented at www.epcos.com/sales.
SAW Components
Low-Loss Filter for Mobile Communication
Data Sheet
Features
s
Low-loss RF filter for mobile telephone
s
s
s
s
s
s
s
s
B7721
942,5 MHz
Chip sized SAW package DCS6K
0,1
4
5
6
0,1
bottom view
EGSM system, receive path
Low amplitude ripple
Usable passband 35 MHz
Unbalanced to balanced operation
Excellent symmetry
Impedance transformation from 50
Ω
to 200
Ω
Suitable for GPRS class 1 to 12
Ceramic package for
Surface Mounted
Technology
(SMT)
Pb-free
0,5
3
2
1
0,5
0,8
2,5
2,0
side view
top view
Terminals
s
Ni, gold-plated
Dimensions in mm
Pin configuration
2
4, 6
1, 3, 5
1, 5
Input, unbalanced
Balanced outputs
To be grounded
Case ground
Type
B7721
Ordering code
B39941–B7721–C910
Marking and Package
according to
C61157-A7-A97
Packing
according to
F61074-V8153-Z000
Electrostatic Sensitive Device
(ESD)
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
ESD voltage
Input power at
GSM850, GSM900
GSM1800 and GSM1900
Tx bands
T
T
stg
V
DC
V
ESD
P
IN
– 25 / + 85
– 40 / + 85
5
100
15
˚C
˚C
V
V
dBm
peak power of GSM signal,
duty cycle 4:8
2
Oct 25, 2002
SAW Components
Low-Loss Filter for Mobile Communication
Data Sheet
Characteristics
Operating temperature range:
Terminating source impedance:
Terminating load impedance:
B7721
942,5 MHz
T
= 25
±
2 ˚C
Z
S
= 50
Ω
Z
L
= 200
Ω
|| 68 nH
min.
typ.
942,5
max.
—
MHz
Center frequency
Maximum insertion attenuation
925,0 ... 960,0
Amplitude ripple
(p-p)
925,0 ... 960,0
Input VSWR
925,0 ... 960,0
Output VSWR
925,0 ... 960,0
Output phase balance
φ(S
31
)−φ(S
21
)
925,0 ... 960,0
Output amplitude balance
(|S
31
/S
21
|)
925,0 ... 960,0
Diff. to common mode suppression
925,0 ... 960,0
824,0 ... 995,0
1648,0 ... 1990,0
3296,0 ... 3980,0
Attenuation
0,0 ... 880,0
880,0 ... 905,0
905,0 ... 915,0
980,0 ...1050,0
1050,0 ...1850,0
1850,0 ...1920,0
1920,0 ...2880,0
2880,0 ...4000,0
4000,0 ...6000,0
MHz
MHz
MHz
f
C
α
max
MHz
∆α
—
—
2,4
2,8
dB
—
1,1
1,5
dB
—
2,2
2,4
—
2,0
2,4
MHz
-5
—
5
degree
MHz
S
sc12
MHz
MHz
MHz
MHz
α
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
-0,5
—
0,5
dB
20
20
20
20
50
30
20
23
50
50
50
40
40
38
29
50
31
64
39
26
30
70
72
64
66
66
—
—
—
—
—
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
3
Oct 25, 2002
SAW Components
Low-Loss Filter for Mobile Communication
Data Sheet
Characteristics
Operating temperature range:
Terminating source impedance:
Terminating load impedance:
B7721
942,5 MHz
T
= -10 to +80 ˚C
Z
S
= 50
Ω
Z
L
= 200
Ω
|| 68 nH
min.
typ.
942,5
max.
—
MHz
Center frequency
Maximum insertion attenuation
925,0 ... 960,0
Amplitude ripple
(p-p)
925,0 ... 960,0
Input VSWR
925,0 ... 960,0
Output VSWR
925,0 ... 960,0
Output phase balance
φ(S
31
)−φ(S
21
)
925,0 ... 960,0
Output amplitude balance
(|S
31
/S
21
|)
925,0 ... 960,0
Diff. to common mode suppression
925,0 ... 960,0
824,0 ... 995,0
1648,0 ... 1990,0
3296,0 ... 3980,0
Attenuation
0,0 ... 880,0
880,0 ... 905,0
905,0 ... 915,0
980,0 ...1050,0
1050,0 ...1850,0
1850,0 ...1920,0
1920,0 ...2880,0
2880,0 ...4000,0
4000,0 ...6000,0
MHz
MHz
MHz
f
C
α
max
MHz
∆α
—
—
2,4
3,0
dB
—
1,1
1,7
dB
—
2,2
2,4
—
2,0
2,4
MHz
-5
—
5
degree
MHz
S
sc12
MHz
MHz
MHz
MHz
α
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
-0,5
—
0,5
dB
20
20
20
20
50
30
20
23
50
50
50
40
40
38
29
50
31
64
37
26
29
70
72
64
66
66
—
—
—
—
—
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
4
Oct 25, 2002
SAW Components
Low-Loss Filter for Mobile Communication
Data Sheet
Transfer function
(measurement)
B7721
942,5 MHz
Transfer function
(wideband measurement)
5
Oct 25, 2002
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