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SIT9121AI-2D2-33E148.350000Y

P1-P3P4-P6P7-P8
SiT9121
1-220
MHz
High
Performance
Differential
Oscillator
The Smart Timing Choice
Rev.
1.07
Page
4
of
8
www.sitime.com
Termination Diagrams
LVPECL:
VDD
VTT = VDD – 2.0 V
Figure 3. LVPECL Typical Termination
VDD
VDD= 3.3V => R1 = 100 to 150
Ω
VDD= 2.5V => R1 = 75
Ω
100 nF
OUT+
Z0 = 50 Ω D+
LVPECL Driver
Receiver Device
100 nF
OUT-
Z0 = 50 Ω
D-
R1 R1
50 Ω 50 Ω
VTT
Figure 4. LVPECL AC Coupled Termination
Figure 5. LVPECL with Thevenin Typical Termination
VDD
=
3.3V
=>
R1
=
R3
=
133
Ω
and
R2
=
R4
=
82
Ω
VDD
VDD
=
2.5V
=>
R1
=
R3
=
250
Ω
and
R2
=
R4
=
62.5
Ω
VDD
R1
R3
OUT+
Z0
=
50
Ω
D+
LVPECL
Driver
Receiver
Device
OUT-
Z0
=
50
Ω
D-
R2
R4
OUT+
Z0
=
50
Ω
D+
LVPECL
Driver
Receiver
Device
OUT-
Z0
=
50
Ω
D-
50
Ω
50
Ω
SiT9121
1-220
MHz
High
Performance
Differential
Oscillator
The Smart Timing Choice
Rev.
1.07
Page
5
of
8
www.sitime.com
LVDS:
Figure 6. LVDS Single Termination (Load Terminated)
VDD
OUT+
Z0
=
50
Ω
D+
LVDS
Driver
100
Ω
Receiver
Device
OUT-
Z0
=
50
Ω
D-
SiT9121
1-220
MHz
High
Performance
Differential
Oscillator
The Smart Timing Choice
Rev.
1.07
Page
6
of
8
www.sitime.com
Dimensions and Patterns
Package
Size
–
Dimensions
(Unit:
mm)
[1]
Recommended
Land
Pattern
(Unit:
mm)
[2]
3.2 x 2.5x 0.75 mm
0
.75±0.05
YXXXX
0.9
#2
#5
#2
#5
#1#3
#4
#6
#1 #3
#4
#6
3.2±0.05
2.5±0.05
0.7
0.6
2.20
1.05
0
.65
1.00
2.25
1.6
5.0 x 3.2 x 0.75 mm
0.75±0.05
YXXXX
1.20
#2
#5
#2
#5
#1#3
#4 #6
#1 #3
#4
#6
7.0 x 5.0x 0.90 mm
5.0±0.10
1.40
1.10
5.08
7.0±0.10
2.60
#1 #3
#6 #4
#1#3
#6
#4
0.90 ±0.10
#2
#5
#2
#5
YXXXX
5.08
1.60
1.60
3.80
Notes:
1.
Top Marking: Y denotes manufacturing origin and XXXX denotes manufacturing lot number. The value of “Y” will depend on the assembly location of the device.
2.
A capacitor of value 0.1 µF between Vdd and GND is recommended.
P1-P3P4-P6P7-P8

SIT9121AI-2D2-33E148.350000Y

Mfr. #:
Buy SIT9121AI-2D2-33E148.350000Y
Manufacturer:
Description:
MEMS OSC XO 148.3500MHZ LVDS SMD
Lifecycle:
New from this manufacturer.
Delivery:
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