SIT9121AI-2D3-25E160.00000Y 数据手册
SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
Features
Applications
Any frequency between 1 MHz and 220 MHz accurate to 6 decimal
places
10GB Ethernet, SONET, SATA, SAS, Fibre Channel,
PCI-Express
LVPECL and LVDS output signaling types
Telecom, networking, instrumentation, storage, servers
0.6ps RMS phase jitter (random) over 12 kHz to 20 MHz bandwidth
Frequency stability as low as ±10 ppm
Industrial and extended commercial temperature ranges
Industry-standard packages: 3.2x2.5, 5.0x3.2 and 7.0x5.0 mmxmm
For frequencies higher than 220 MHz, refer to SiT9122 datasheet
Electrical Characteristics
Parameter and Conditions
Symbol
Min.
Typ.
Max.
Unit
Condition
LVPECL and LVDS, Common Electrical Characteristics
Supply Voltage
Output Frequency Range
Frequency Stability
Vdd
f
F_stab
2.97
3.3
3.63
V
2.25
2.5
2.75
V
2.25
–
3.63
V
1
–
220
MHz
-10
–
+10
ppm
-20
–
+20
ppm
-25
–
+25
ppm
Termination schemes in Figures 1 and 2 - XX ordering code
Inclusive of initial tolerance, operating temperature, rated power
supply voltage, and load variations
-50
–
+50
ppm
First Year Aging
F_aging1
-2
–
+2
ppm
25°C
10-year Aging
F_aging10
-5
–
+5
ppm
25°C
T_use
-40
–
+85
°C
-20
–
+70
°C
–
–
Vdd
Operating Temperature Range
Industrial
Extended Commercial
Input Voltage High
VIH
70%
Input Voltage Low
VIL
–
–
30%
Vdd
Pin 1, OE or ST
Input Pull-up Impedance
Z_in
–
100
250
kΩ
Pin 1, OE logic high or logic low, or ST logic high
2
–
–
MΩ
Pin 1, ST logic low
–
6
10
ms
Measured from the time Vdd reaches its rated minimum value.
–
6
10
ms
–
55
%
Start-up Time
T_start
Resume Time
T_resume
Duty Cycle
DC
45
Pin 1, OE or ST
In Standby mode, measured from the time ST pin
crosses 50% threshold.
Contact SiTime for tighter duty cycle
LVPECL, DC and AC Characteristics
Current Consumption
Idd
–
61
69
mA
Excluding Load Termination Current, Vdd = 3.3V or 2.5V
OE Disable Supply Current
I_OE
–
–
35
mA
OE = Low
Output Disable Leakage Current
I_leak
–
–
1
µA
OE = Low
Standby Current
I_std
–
–
100
µA
ST = Low, for all Vdds
I_driver
–
–
30
mA
Maximum average current drawn from OUT+ or OUT-
Output High Voltage
VOH
Vdd-1.1
–
Vdd-0.7
V
Output Low Voltage
VOL
Vdd-1.9
–
Vdd-1.5
V
See Figure 1(a)
V_Swing
1.2
1.6
2.0
V
See Figure 1(b)
Rise/Fall Time
Tr, Tf
–
300
700
ps
20% to 80%, see Figure 1(a)
OE Enable/Disable Time
RMS Period Jitter
T_oe
T_jitt
–
–
–
–
–
1.2
1.2
1.2
115
1.7
1.7
1.7
ns
ps
ps
ps
RMS Phase Jitter (random)
T_phj
–
0.6
0.85
ps
f = 212.5 MHz - For other frequencies, T_oe = 100ns + 3 period
f = 100 MHz, VDD = 3.3V or 2.5V
f = 156.25 MHz, VDD = 3.3V or 2.5V
f = 212.5 MHz, VDD = 3.3V or 2.5V
f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, all
Vdds
Maximum Output Current
Output Differential Voltage Swing
See Figure 1(a)
LVDS, DC and AC Characteristics
Current Consumption
Idd
–
47
55
mA
Excluding Load Termination Current, Vdd = 3.3V or 2.5V
OE Disable Supply Current
I_OE
–
–
35
mA
OE = Low
Differential Output Voltage
VOD
250
350
450
mV
See Figure 2
SiTime Corporation
Rev. 1.07
990 Almanor Avenue, Sunnyvale, CA 94085
(408) 328-4400
www.sitime.com
Revised January 4, 2016
SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
Electrical Characteristics (continued)
Parameter and Conditions
Symbol
Min.
Typ.
Max.
Unit
Condition
LVDS, DC and AC Characteristics (continued)
Output Disable Leakage Current
I_leak
–
–
1
µA
Standby Current
I_std
–
–
100
µA
ST = Low, for all Vdds
∆VOD
–
–
50
mV
See Figure 2
VOD Magnitude Change
Offset Voltage
OE = Low
VOS
1.125
1.2
1.375
V
See Figure 2
VOS Magnitude Change
∆VOS
–
–
50
mV
See Figure 2
Rise/Fall Time
Tr, Tf
–
495
700
ps
20% to 80%, see Figure 2
OE Enable/Disable Time
RMS Period Jitter
T_oe
T_jitt
–
–
–
–
–
1.2
1.2
1.2
115
1.7
1.7
1.7
ns
ps
ps
ps
RMS Phase Jitter (random)
T_phj
–
0.6
0.85
ps
f = 212.5 MHz - For other frequencies, T_oe = 100ns + 3 period
f = 100 MHz, VDD = 3.3V or 2.5V
f = 156.25 MHz, VDD = 3.3V or 2.5V
f = 212.5 MHz, VDD = 3.3V or 2.5V
f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, all
Vdds
Pin Description
Pin
Map
Functionality
OE
Input
H or Open: specified frequency output
L: output is high impedance
ST
Input
H or Open: specified frequency output
L: Device goes to sleep mode. Supply current reduces to
I_std.
OE/ST
1
6
VDD
NC
NA
No Connect; Leave it floating or connect to GND for better
heat dissipation
NC
2
5
OUT-
GND
3
4
OUT+
1
2
3
GND
Power
VDD Power Supply Ground
4
OUT+
Output
Oscillator output
5
OUT-
Output
Complementary oscillator output
6
VDD
Power
Power supply voltage
Top View
Absolute Maximum
Attempted operation outside the absolute maximum ratings may cause permanent damage to the part. Actual performance of
the IC is only guaranteed within the operational specifications, not at absolute maximum ratings.
Min.
Max.
Unit
Storage Temperature
Parameter
-65
150
°C
VDD
-0.5
4
V
Electrostatic Discharge (HBM)
–
2000
V
Soldering Temperature (follow standard Pb free soldering guidelines)
–
260
°C
Thermal Consideration
θJA, 4 Layer Board
θJC, Bottom
Package
(°C/W)
(°C/W)
7050, 6-pin
142
27
5032, 6-pin
97
20
3225, 6-pin
109
20
Environmental Compliance
Parameter
Condition/Test Method
Mechanical Shock
MIL-STD-883F, Method 2002
Mechanical Vibration
MIL-STD-883F, Method 2007
Temperature Cycle
JESD22, Method A104
Solderability
MIL-STD-883F, Method 2003
Moisture Sensitivity Level
MSL1 @ 260°C
Rev. 1.07
Page 2 of 8
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SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
Waveform Diagrams
OUT80%
80%
20%
20%
VOH
OUT+
Tr
VOL
Tf
GND
Figure 1(a). LVPECL Voltage Levels per Differential Pin (OUT+/OUT-)
V _ S w in g
0 V
t
Figure 1(b). LVPECL Voltage Levels Across Differential Pair
OUT80%
80%
VOD
20%
20%
OUT+
VOS
Tr
Tf
GND
Figure 2. LVDS Voltage Levels per Differential Pin (OUT+/OUT-)
Rev. 1.07
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SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
Termination Diagrams
LVPECL:
VDD
Z0 = 50 Ω
OUT+
D+
Receiver Device
L V P E C L D riv e r
Z0 = 50 Ω
OUT-
D50 Ω
50 Ω
VTT = VDD – 2.0 V
Figure 3. LVPECL Typical Termination
VDD= 3.3V => R1 = 100 to 150 Ω
VDD= 2.5V => R1 = 75 Ω
VDD
100 nF
Z0 = 50 Ω
OUT+
D+
Receiver Device
LVPECL Driver
100 nF
Z0 = 50 Ω
OUTR1
R1
D50 Ω
50 Ω
VTT
Figure 4. LVPECL AC Coupled Termination
VDD = 3.3V => R1 = R3 = 133 Ω and
R2 = R4 = 82 Ω
VDD = 2.5V => R1 = R3 = 250 Ω and
R2 = R4 = 62.5 Ω
VDD
R1
VDD
OUT+
R3
Z0 = 50 Ω
D+
Receiver Device
LVPECL Driver
OUT-
Z0 = 50 Ω
DR2
R4
Figure 5. LVPECL with Thevenin Typical Termination
Rev. 1.07
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SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
LVDS:
VDD
OUT+
Z0 = 50 Ω
D+
100 Ω
LVDS Driver
OUT-
Z0 = 50 Ω
Receiver Device
D-
Figure 6. LVDS Single Termination (Load Terminated)
Rev. 1.07
Page 5 of 8
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SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
Dimensions and Patterns
Package Size – Dimensions (Unit: mm)[1]
Recommended Land Pattern (Unit: mm)[2]
3.2 x 2.5x 0.75 mm
3.2±0.05
2.25
2.20
#4
#2
#3
#6
#1
#3
#2
1.00
0.7
0.9
YXXXX
#5
#4
1.6
#5
2.5±0.05
#6
#1
0.6
0.65
1.05
0.75±0.05
5.0 x 3.2 x 0.75 mm
#5
#4
#2
#3
#5
#4
#6
1.20
#6
YXXXX
#1
#3
#2
#1
0.75±0.05
7.0 x 5.0x 0.90 mm
7.0±0.10
5.08
#6
#3
#3
#2
1.60
#2
5.08
#5
1.10
YXXXX
#1
#4
3.80
#4
2.60
#5
5.0±0.10
#6
#1
0.90 ±0.10
1.40
1.60
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.
Rev. 1.07
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SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
Ordering Information
SiT9121AC-1C2-33E125.000000T
Packaging:
“T”, “Y”, “X”, “D”, “E” or “G”
Refer to table below for packing
method
Leave Blank for Bulk
Part Family
“SiT9121”
Revision Letter
Frequency
“A” is the revision of Silicon
1.000000 MHz to 220.000000 MHz
Feature Pin
“E” for Output Enable
“S” for Standby
Temperature Range
“I” Industrial, -40 to 85°C
“C” Extended Commercial, -20 to 70°C
Voltage Supply
“25” for 2.5V ±10%
“33” for 3.3V ±10%
“XX” for 2.25V to 3.63V
Signalling Type
“1” = LVPECL
“2” = LVDS
Package Size
“B” 3.2 x 2.5 mm x mm
“C” 5.0 x 3.2 mm x mm
“D” 7.0 x 5.0 mm x mm
Frequency Stability
“F” for ±10 ppm
“1” for ±20 ppm
“2” for ±25 ppm
“3” for ±50 ppm
Ordering Codes for Supported Tape & Reel Packing Method
Device Size
8 mm T&R
(3ku)
8 mm T&R
(1ku)
8 mm T&R
(250u)
12 mm T&R
(3ku)
12 mm T&R
(1ku)
12 mm T&R
(250u)
16 mm T&R
(3ku)
16 mm T&R
(1ku)
16 mm T&R
(250u)
7.0 x 5.0 mm
–
–
–
–
5.0 x 3.2 mm
–
–
–
T
–
–
T
Y
X
Y
X
–
–
3.2 x 2.5 mm
D
E
G
T
Y
–
X
–
–
–
Frequencies Not Supported
Range 1: From 209.000001 MHz to 210.999999 MHz
Rev. 1.07
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SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
Revision History
s
Version
Release Date
1.01
2/20/13
Change Summary
Original
1.02
12/3/13
Added input specifications, LVPECL/LVDS waveforms, packaging T&R options
1.03
2/6/14
Added 8mm T&R option and ±10 ppm
1.04
4/8/14
Included 1.8V option for LVDS output only
1.05
7/30/14
Included Thermal Consideration table
1.06
10/20/14
Modified Thermal Consideration values. Preliminary removed from the title
1.07
1/4/16
Removed 1.8V option
Disclaimer: This document is not an official SiTime datasheet. It is exported from a Master FrameMaker document for your convenience, to simplify the generation
of your datasheet. The information in the official SiTime datasheet on SiTime’s website will be the final reference in case of conflicting information.
Rev. 1.07
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