SAW filters for infrastructure systems
Series/Type: B3688
The following products presented in this data sheet are being withdrawn.
Ordering Code Substitute Product Date of Withdrawal Deadline Last
Orders Last Shipments
B39501B3688H310 2012-01-13 2012-12-31 2013-03-30
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.
2Jan 29, 2003
SAW Components B3688
499,25 MHzLow-Loss Filter
Data Sheet
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000
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111
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00
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0
0
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1
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1
1
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1
1
1
1
111
00
0
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1,48
side view
7,0
5,0
top view
456
1110 12
2,54
1,4
2
8
2,54
0,6
31
7
bottom view
9
1,0
Ceramic package QCC12C
Features
●Low-loss filter
●Temperature stable
●Package for Surface Mounted Technology
(SMT)
●Hermetically sealed ceramic package
Terminals
●Gold-plated
Dimensions in mm, approx. weight 0,2 g
Pin configuration
10 Input
12 Input ground or bal. input
4 Output
6 Output ground or bal. output
3, 9 Case - ground
1, 2, 7, 8 To be grounded
Electrostatic Sensitive Device (ESD)
Type Ordering code Marking and Package
according to Packing
according to
B3688 B39501-B3688-H310 C61157-A7-A95 F61074-V8170-Z000
Maximum ratings
Operable temperature range
T
– 45/+ 85 ˚C
Storage temperature range
T
stg – 40/+ 85 ˚C
DC voltage
V
DC 0V
Source power
P
s 10 dBm source impedance 50 Ω
3Jan 29, 2003
SAW Components B3688
499,25 MHzLow-Loss Filter
Data Sheet
Characteristics
Operating temperature: T = -25 ... +75 ˚C
Terminating source impedance:
Z
S=50Ω and matching network
Terminating load impedance:
Z
L=50Ωand matching network
Matching circuit: Cp1 = 14pF 2)
Ls2 = 21nH 2)
Ls3 = 22nH 2)
Cp4 = 13pF 2)
1) Temperature dependance of
f
c:
f
c(
T
A) =
f
c(
T
0)(1 +
TC
f(
T
A –
T
0)2)
2) Element values depend on PCB layout
min. typ. max.
Nominal frequency
f
N— 499,25 — MHz
Insertion attenuation at
f
N (T=25 ˚C) αN6,0 8,0 9,0 dB
Variation of insertion att. (rel. to αN)αrel ——±0,9 dB
Frequency response
3 dB Lower frequency
f
L 3dB — 498,27 498,75 MHz
3 dB Upper frequency
f
U 3dB 499,75 500,23 — MHz
35 dB Lower frequency
f
L35dB 496,25 496,75 — MHz
35 dB Upper frequency
f
U35dB — 501,85 502,25 MHz
Amplitude ripple (peak to adjacent valley)
f
N± 100 kHz — — 0,5 dB
Relative attenuation αrel
f
N - 200,0 MHz ...
f
N - 10,0 MHz 40 55 — dB
f
N - 10,0 MHz ...
f
N - 3,0 MHz 35 48 — dB
f
N + 3,0 MHz ...
f
N + 10,0 MHz 35 43 — dB
f
N + 10,0 MHz ...
f
N + 200,0 MHz 40 51 — dB
Temperature coefficient of frequency 1)
TC
f— – 0,036 — ppm/K2
Turnover temperature
T
0—25—˚C
4Jan 29, 2003
SAW Components B3688
499,25 MHzLow-Loss Filter
Data Sheet
Normalized frequency response
Normalized frequency response (pass band)
5Jan 29, 2003
SAW Components B3688
499,25 MHzLow-Loss Filter
Data Sheet
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW MC IS
P.O. Box 80 17 09, 81617 Munich, GERMANY
EPCOS AG 2003. Reproduction, publication and dissemination of this brochure and the informa-
t
ion contained therein without EPCOS’ prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of
t
he Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic
Manufacturers’ Association), unless otherwise agreed.
T
his brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or
t
he international Representatives.
Due to technical requirements components may contain dangerous substances. For information on
t
he type in question please also contact one of our Sales Offices.
