5.0VDC or 3.3VDC • HCMOS/ TTL SPREAD-SPECTRUM • SURFACE-MOUNT
ULTRA LOW NOISE CRYSTAL CLOCK OSCILLATORS
ASSM and ASSML
FEATURES:
14.27 x10.7 x 5.3 mm
• Patented spread spectrum technology.
• Meets FCC and EMC Directive for EMI requirements.
• Standard TTL or HCMOS compatible output. • Drop-in replacement for standard plastic SMD crystal oscillators
• Meets clock requirements on all major
• Wide frequency range 4.0MHz to 128MHz.
CISC, RISC, and DSP processors.
• Reduce electromagnetic emissions up to 20dB!
APPLICATIONS:
• Telecommunications.
• Capital equipment.
• Consumer electronics, printers. • Medical equipment.
• Aerospace.
4
3
STANDARD SPECIFICATIONS
Frequency Range
3.5
ASSM
MHz
MHz - 25
PARAMETERS
ASSML
Operation Mode
Fundamental, AT
- 128MHz
Frequency Range
(F
o
)
4.0MHz
Operating Temperature
-10°C to + 60° C
(See Options)
Operating Temperature
(T
OPR
)
0°C to +70°C
(See Options)
Storage Temperature
-55°C to + 125° C
Storage Temperature
-65°C to
Options)
Frequency Tolerance
@
25°C(T
STO
)
± 50 ppm max.
(See
+150°C
Frequency Stability over Temp.
±100ppm
(See
(See Options)
Frequency StabilityVS.Temp.(∆F/ F
o
)
± 50 ppm max. max.
Options)
Supply Voltage
5.0Vdc ± 3.5
Equivalent Series Resistance (V
dd
)
200
Ω
for 5% MHz < F < 3.3Vdc ± 5%
4.0 MHz
(ESR) Maximum
150
Ω
for 4.0 30mA< F < 6.0 MHz
MHz max.
Input Current
(I
dd
)
100
Ω
for 6.0 MHz < max. 10.0 MHz
Duty Cycle
(S
YM
)
45 / 55% F <
80
Ω
for 10 MHz < max.14.0 MHz
3.5ns F <
Rise and Fall Times
(T
r /
T
f
)
_
50
Ω
for 14 MHz < F < 25 MHz
10LSTTL or 15pF
Output Load
Shunt Capacitance C
0
7 pF max.
Output Voltage
(V
OH
, V
OL
)
Vdd - 1.0V min. (VOH) ; 0.4Vdc max. (VOL)
Load Capacitance C
L
16p F
(See Option)
Start-up Time
(T
OSC
)
10ms
Drive Level
100 µΩ max. max. ,5ms typ.
Aging
±5ppm max./year
Aging
@
25° C First Year
± 5 pp m max.
Jitter
250ps typ.
Insulation Resistance
500
M
Ω
min. at 100 Vdc ± 15V
Bandwidth variations
5% typ. (±2.5% of center frequency)
(See Options)
Test circuit, waveforms, see appendix B. Reflow profile, see appendix E.
Environmental and mechanical specifications, Please call Abracon for details.
Recommended handling, see appendix F.
1
2
1
Dimensions: Inches (mm)
PIN
NUMBER
FUNCTION
ORDERING OPTIONS
ASSMX - Frequency - Temperature - Frequency Stability
Blank or L
-
Bandwidth
-
Packaging
-T for Tape and Reel
dB u V/M
XX.XXXX MHz
-E for -20°C to + 70°C
-F for -30°C to + 70°C
-N for -30°C to + 85°C
-L for -40°C to + 85°C
-R
-K
-H
-C
for ± 25ppm max
for ± 30ppm max
for ± 35ppm max
for ± 50ppm max
B1 for 1%(±0.5%of F
o
)
B2 for 2%(±1%of F
o
)
B3 for 3%(±1.5%of F
o
)
B4 for 4%(±2%of F
o
)
1
2
3
4
NC
GND
Output
V
dd
Output Data
(1) Gray-
Standard
Oscillator
[1]
60.0
50.0
40.0
30.0
20.0
10.0
0.0
Frequency:MHz
[2]
(2) Black-
ASSML
Low Noise
Oscillator
30.0
100.0
200.0
NOTE: Left blank if standard
•
All specifications and markings subject to change without notice
ABRACON
ABRACON IS
ISO 9001 / QS 9000
CERTIFIED
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
®
Rev A
2/2003
CORPORATION
51单片机
京公网安备 11010802033920号
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