12
ABLSOLUTE MAXIMUM RATINGS:
CERAMIC SURFACE-MOUNT
SAW RESONATORS
ASR318S2
Marking:
ASR
318S2
FEATURES:
SAW resonator 318.0 MHz.
Small ceramic surface-mount.
SMD makes reflow soldering possible.
Gold plated terminals.
6.3 x 4.4 x 2.08mm
CHARACTERISTICS UNIT
min. typ. max.
Center frequency
Fr MHz 317.925 318.000 318.075
Insertion loss
IL dB - 1.3 2.0
Shunt capacitance
Co pF - 3.0 -
Motional resistance
R1
- 16 26
Motional inductance
L1 uH
- 66.799 -
Motional capacitance C1 fF - 3.7537 -
Turn-over temperature To
C
25 40 55
Temperature coefficient Tc
ppm/
C
2
-
0.032
-
Aging per year [A]
ppm/yr
- - 10
DC insulation resistance
M
1.0 - -
DC voltage 30Vdc
Operating temperature -40C to +85C
Maximum power dissipation 10dBm
Equivalent circuit:
Test circuit:
Pin No.
Function
1 Input/Output
2 Output/Input
3 & 4 Case GND
Dimensions: Inches (mm)
-200
-150
-100
-50
0
-200
-150
-100
-50
0
-80 -60 -40 -20 0 +20 +40 +60 +80
fc=fo, Tc=To
T=Tc-To(
o
C)
Typical Frequency Response
Temperature Characteristics
CH1
1
1:Transmission /M Log Mag 5.8 dB/ Ref -1.52 dB
2: Off
Center 318.000 MHz Span 0.008 MHz
Packaging option: -T for tape and reel, see appendix H.
Reflow profile, see appendix E. Reliability specifications,
Enviromental and mechanical specifcations, see page 91 in the Abracon Catalog
1
2
4
3
To 50
Load
To 50
Load
Rm
Lm
Cm
Cp
0.05pF
-37
-32
-27
-22
-17
-12
-7
-2
29 Journey Aliso Viejo, CA 92656 USA
(949) 448-7070 F
AX
: (949) 448-8484
E-
MAIL
:
abinfo
@
abracon.com
I
NTERNET
A
DDRESS
:
www.abracon.com
NOTE: All specifications and markings subject to change without notice
ABRACON
C O R P O R A T I O N
ABRACON IS
ISO 9001 / QS 9000
CERTIFIED
S12
0.25
(6.3)
0.11
(2.9)
0.17
(4.44)
0.19
(4.8)
0.08
MAX
(2.0)
0.08
(2.08)
0.047
(1.2)
0.043
MAX
(1.1)
0.06
MAX
(1.53)
1
2
4
3
COMMON APPLICATIONS:
Quartz frequency stabilization of fixed-frequency transmitters at 318.0 MHz.
Wireless car alarm, Garage door opener. (RKE)
Mobile communications systems
STANDARD SPECIFICATIONS
STANDARD SPECIFICATIONS
PDF 
ZIP