Oscilent Corporation | 491 Series SMD Crystal Oscillators
Page 1 of 2
SMD Oscillators
Series Number
Package
Description
Last Modified
491
4 Pad PCB
PECL Output
Jan. 01 2002
FEATURES
- Wave form symmetry of 40/60%
- PECL output
- Industry standard 4 Pad PCB SMD Package
- RoHs / Lead Free compliant
OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS
PARAMETERS
Output Logic
Input Voltage (VDD)
Frequency Range (f
O
)
Operating Temperature (T
OPR
)
Storage Temperature (T
STG
)
Overall Frequency Stability
CONDITIONS
-
-
-
-
-
-
(a) Frequency Tolerance
(b) Temperature Stability
(c) Input Voltage Stability
(d) Load Stability
Input Current (I
DD
)
Aging
Rise Time (T
R
)
Fall Time (T
F
)
Output Voltage High "1" VOH
Output Voltage Low "0" VOL
Load
Duty Cycle
Start-Up Time (T
S
)
Jitter
-
@ 25°C
20% to 80% of Waveform
20% to 80% of Waveform
PECL
PECL
-
50% of Waveform
-
RMS
CHARACTERISTICS
Positive ECL Square Wave (PECL)
3.3 ±10%
5.0 ±10%
UNITS
-
VDC
MHz
°C
°C
PPM
-
-
-
-
mA
PPM/Y
nS
nS
VDC
VDC
Ohms
%
mS
ps
19.440 ~ 180.0 (Fund, Third, Fifth / UM-1)
0 ~ +70 (Std.) / -40 ~ 85 (Option)
-55 ~ +125
±20 (0 ~ +70°C Only), ±25, ±50, ±100 max.
Inclusive of Overall Stability
Inclusive of Overall Stability (Operating Temperature)
Inclusive of Overall Stability (VDD ±5%)
Inclusive of Overall Stability (RL ±5%)
80 max.
±1 max.
2 max.
2 max.
VDD - 1.025 min.
VDD - 1.620 max.
50
50 ±10 (Std.) / 50 ±5 (Option)
10 max.
3.5 max.
120 max.
Oscilent Corporation | 491 Series SMD Crystal Oscillators
Page 2 of 2
PIN CONNECTIONS
#1 Complimentary Output
(CO) OR No Connection
(NC)
#2 Ground
#3 Output
#4 Vdd
PART NUMBER GUIDE
Series
Number
Frequency
Voltage
Supply
Option
Frequency
Tolerance &
Stability (max.)
Operating Temp. (°
C)
Duty Cycle
Pin 1 Connection
491
Oscilent
SMD
Oscillators
- 28.0 M
Enter your freq.
e.g. 28.0M = 28.00 MHz
-5
5 = 5VDC
3 = 3.3VDC
D=
E=
F=
G=
D
±100 PPM
±50 PPM
±25 PPM
±20 PPM
N
Blank* = 0~+70
N = -40~+85
-T
Blank*= 50±10%
T = -50±5%
CO
CO =
Complimentary
Output
NC = No
Connection
NOTE:
- Deviations on all parameters available. Please consult Oscilent for details.
DEFINITIONS:
- Click on the characteristic names above, for definitions of the particular characteristic.
*STANDARDS:
- "Blank" part number selections, indicate standard variables for the particular characteristic.
PACKAGING:
- Add
-TR
for Tape/Reel. Click
here
for tape/reel specifications
Oscilent Corporation
-
CALL
949.252.0522
18195 East McDurmott Street . Building D . Irvine . CA 92614 . USA
Fax: 949.252.0599 . E-Mail: Sales@Oscilent.com
Series No.:
491
Crystal Oscillators
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|
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|
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|
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