The Smart Timing Choice
The Smart Timing Choice
SiT5001
1-80 MHz MEMS TCXO and VCTCXO
Rev. 0.90 Page 1 of 7 www.sitime.com
Features Applications
Any frequency between 1 and 80 MHz accurate to 6 decimal places WiFi, 3G, LTE, SDI, Ethernet, SONET, DSL
100% pin-to-pin drop-in replacement to quartz-based (VC)TCXO Telecom, networking, smart meter, wireless, test instrumentation
Frequency stability as low as ±1.5PPM. Contact SiTime for ±1 PPM
option
Ultra low phase jitter: 0.5 ps (12 kHz to 20 MHz)
Voltage control option with pull range from ±12.5 PPM to ±50 PPM
LVCMOS compatible output with SoftEdge™ option for EMI reduction
Voltage control, standby, output enable or no connect modes
Standard 4-pin packages: 2.5 x 2.0, 3.2 x 2.5, 5.0 x 3.2, 7.0 x 5.0 mm
Outstanding silicon reliability of 2 FIT, 10 times better than quartz
Pb-free, RoHs and REACH compliant
Electrical Characteristics
Parameter Symbol Min. Typ. Max. Unit Condition
Output Frequency Range f1–80MHz
Initial Tolerance F_init -1 – 1 PPM At 25°C
Stability Over Temperature F_stab -1.5 – +1.5 PPM Over operating temperature range at rated nominal power
supply voltage and load. (see ordering codes on page 6)
±1.5PPM is available in -20 to 70 °C temp. range only.
Contact SiTime for ±1 PPM options.
-2 – +2 PPM
-2.5 – +2.5 PPM
-5 – +5 PPM
Supply Voltage F_vdd – 50 – PPB ±10% Vdd (±5% for Vdd = 1.8V)
Output Load F_load – 0.1 – PPM 15 pF ±10% of load
First year Aging F_aging -1.5 – +1.5 PPM 25°C
10-year Aging -3.5 – +3.5 PPM 25°C
Stability vs. Temperature Slope F_slope – 0.1 – PPM/°C
Operating Temperature Range T_use -20 – +70 °C Extended Commercial
-40 – +85 °C Industrial
Supply Voltage Vdd 1.71 1.8 1.89 V Contact SiTime for any other supply voltage options.
2.25 2.5 2.75 V
2.52 2.8 3.08 V
2.70 3.0 3.3 V
2.97 3.3 3.63 V
Pull Range PR ±12.5, ±25, ±50 PPM
Upper Control Voltage VC_U Vdd-0.1 – – V All Vdds. Voltage at which maximum deviation is guaranteed.
Control Voltage Range VC_L – – 0.1 V
Control Voltage Input Impedance Z_vc 100 – – k
Frequency Change Polarity – Positive slope –
Control Voltage -3dB Bandwidth V_BW – – 8 kHz
Current Consumption Idd – 31 33 mA No load condition, f = 20 MHz, Vdd = 2.5V, 2.8V or 3.3V.
– 29 31 mA No load condition, f = 20 MHz, Vdd = 1.8V.
OE Disable Current I_OD – – 31 mA Vdd = 2.5V, 2.8V or 3.3V, OE = GND, output is Weakly Pulled Down
– – 30 mA Vdd = 1.8 V. OE = GND, output is Weakly Pulled Down
Standby Current I_std – – 70 µA Vdd = 2.5V, 2.8V or 3.3V, ST = GND, output is Weakly Pulled Down.
– – 10 µA Vdd = 1.8V. ST = GND, output is Weakly Pulled Down.
Duty Cycle DC 45 – 55 % All Vdds
LVCMOS Rise/Fall Time Tr, Tf – 1.5 2 ns LVCMOS option. Default rise/fall time, All Vdds, 10% - 90% Vdd.
SoftEdge™ Rise/Fall Time SoftEdge™ Rise/Fall Time Table ns SoftEdge™ option. Frequency and supply voltage dependent.
Output Voltage High VOH 90% – – Vdd OH = -7 mA, IOL = 7 mA, (Vdd = 3.3V, 3.0V)
IOH = -4 mA, IOL = 4 mA, (Vdd = 2.8V, 2.5V)
IOH = -2 mA, IOL = 2 mA, (Vdd = 1.8V)
Output Voltage Low VOL – – 10% Vdd
Input Voltage High VIH 70% – – Vdd Pin 1, OE or ST
Input Voltage Low VIL – – 30% Vdd Pin 1, OE or ST
Input Pull-up Impedance Z_in – 100 250 k
The Smart Timing Choice
The Smart Timing Choice
SiT5001
1-80 MHz MEMS TCXO and VCTCXO
Rev. 0.90 Page 2 of 7 www.sitime.com
Top View
1 4
VC/OE/ST VDD
32
GND OUT
Note:
1. All electrical specifications in the above table are measured with 15pF output load, Contact SiTime for higher drive options.
Electrical Characteristics (continued)
Parameter Symbol Min. Typ. Max. Unit Condition
Startup Time T_start – – 10 ms Measured from the time Vdd reaches its rated minimum value
OE Enable/Disable Time T_oe – – 150 ns f = 80 MHz. For other frequencies, T_oe = 100 ns + 3 cycles
Resume Time T_resume – 6 10 ms Measured from the time ST pin crosses 50% threshold
RMS Period Jitter T_jitt – 1.7 2 ps f = 10 MHz, Vdd = 2.5V, 2.8V or 3.3V
– 1.7 2 ps f = 10 MHz, Vdd = 1.8V
RMS Phase Jitter (random) T_phj – 0.5 1 ps f = 10 MHz, Integration bandwidth = 12 kHz to 20 MHz, All Vdds
Environmental Compliance
Pin Configuration
Pin Symbol Functionality
1VC/OE/ST
/NC
V control Voltage control
Output
Enable
H or Open[2]: specified frequency output
L: output is high impedance. Only output driver is disabled.
Standby
H or Open[2]: specified frequency output
L: output is low (weak pull down). Device goes to sleep mode. Supply
current reduces to I_std.
NC No connect (input receiver off)
2 GND Power Electrical and case ground
3 CLK Output Oscillator output
4 VDD Power Power supply voltage
Note:
2. A pull-up resistor of <10 k between OE/ ST pin and Vdd is recommended in high noise environment when the device operates in OE/ST mode.
Absolute Maximum
Attempted operation outside the absolute maximum ratings of the part may cause permanent damage to the part. Actual perfor-
mance of the IC is only guaranteed within the operational specifications, not at absolute maximum ratings.
Parameter Min. Max. Unit
Storage Temperature -65 150 °C
VDD -0.5 4 V
Electrostatic Discharge – 2000 V
Soldering Temperature (follow standard Pb free soldering guidelines) – 260 °C
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
The Smart Timing Choice
The Smart Timing Choice
SiT5001
1-80 MHz MEMS TCXO and VCTCXO
Rev. 0.90 Page 3 of 7 www.sitime.com
Timing Diagram
Phase Noise Plot
50% Vdd
Vdd ST Voltage
CLK Output
T_resume
T_resume: Time to resume from ST
90% Vdd, 2.5/2,8/3.3V devices
95% Vdd, 1.8V devices Vdd Pin 4 Voltage
CLK Output
T_start
T_start: Time to start from power-off
(ST/OE Mode) (ST Mode Only)
10
310
410
510
6
-170
-160
-150
-140
-130
-120
-110
-100
Frequency Offset (Hz)
Phase Noise (dBc/Hz)
Phase Noise, 10MHz carrier, 3.3V, LVCMOS output, TCXO
Integrated random phase jitter (RMS, 12kHz-5MHz): 0.52ps
The Smart Timing Choice
The Smart Timing Choice
SiT5001
1-80 MHz MEMS TCXO and VCTCXO
Rev. 0.90 Page 4 of 7 www.sitime.com
SoftEdge™ Option
The SoftEdge™ output is available as a standard option for the SiT500x family of MEMS (VC)TCXOs. It is typically used for EMI
reduction similar to that of the clipped sinewave output common to many quartz based TCXOs.
In the SoftEdge™ mode, the slower rise/fall edges of the output waveform reduce the higher clock harmonics in a digital clock
signal, minimizing EMI radiation at these harmonics. The table below show the actual rise/fall time in relation to the desired output
frequency and the supply voltage with a 10 k / 10pF load. Rail-to-rail swing of the output is maintained for these supported
frequencies.
Rise/Fall Time for SoftEdge™ Option
Parameter Symbol Min. Typ. Max. Unit Condition
Rise/Fall Time Tr, Tf 4.0 6.5 9.5 ns 1-26MHz, 1.8V, 3.0 and 3.3V, MHz 10k and 10 pF, 20%-80% Vd
2.5 4.0 6.0 ns 1-26MHz, 2.5V and 2.8V, MHz 10k and 10 pF, 20%-80% Vdd
1.5 3.5 5.0 ns
26-50MHz, 1.8V, 3.0V and 3.3V, MHz 10k and 10 pF, 20%-80% Vdd
1.5 2.5 4.5 ns 26-50 MHz, 2.5V and 2.8V, MHz 10k and 10 pF, 20%-80% Vdd
SoftEdge™ Waveform Examples and Corresponding Harmonics Reduction
Figures below illustrate the harmonic power reduction as the rise/fall times are slowed from the standard squarewave output to
that of the SoftEdge™ output. In general, the 1.8V device shows the lowest harmonics and provides best EMI performance
comparing to devices with higher operating voltages.
Time (ns)
LVCMOS and SoftEdge™ Outputs,
VDD = 3.3V
010 20 30 40 50 60 70 80 90 100 110 120 130 140 150
0
0.5
1
1.5
2
2.5
3
3.5
Amplitude (V)
SoftEdge
LVCMOS
Harmonic Number
Harmonic Power (dbm)
Odd Harmonic Power Comparison for LVCMOS and SoftEdge™ Outputs,
VDD = 3.3V
0 2 4 6 8 10 12 14 16 18 20
-40
-30
-20
-10
0
10
20
SoftEdge
LVCMOS
-10dBm
-24.4dbm
LVCMOS and SoftEdge Outputs,
VDD = 1.8V
Time ( 20ns/Div )
Amplitude ( 0.5V/Div )
SoftEdge
LVCMOS
Odd Harmonic Power Comparison for LVCMOS and SoftEdge Outputs,
VDD = 1.8V
0 2 4 6 8 10 12 14 16 18 20
-40
-30
-20
-10
0
10
20
Harmonic Number
H
r
ic P
w
r
SoftEdge
LVCMOS
-17 dBm
-22
dBm
Time (20 ns/Div)
Amplitude( 0.5V/Div)
LVCMOS and SoftEdge Outputs,
VDD = 2.5V
SoftEdge
LVCMOS
0 2 4 6 8 10 12 14 16 18 20
-40
-30
-20
-10
0
10
20
Harmonic Number
H
a
r
m
o
n
i
c
P
o
w
e
r
(
d
b
m
)
Odd Harmonic Power Comparison for LVCMOS and SoftEdge Outputs,
VDD = 2.5V
SoftEdge
LVCMOS
-11 dBm
-20 dBm
The Smart Timing Choice
The Smart Timing Choice
SiT5001
1-80 MHz MEMS TCXO and VCTCXO
Rev. 0.90 Page 5 of 7 www.sitime.com
Notes:
3. 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.
4. A capacitor of value 0.1 F between Vdd and GND is recommended.
Dimensions and Patterns
Package Size – Dimensions (Unit: mm) [3] Recommended Land Pattern (Unit: mm) [4]
2.7 x 2.4 x 0.75 mm (100% compatible with 2.5 x 2. 0 mm footprint)
3.2 x 2.5 x 0.75 mm
5.0 x 3.2 x 0.75 mm
7.0 x 5.0 x 0.90 mm
YXXXX
3.2 ± 0.05
2.5 ± 0.05
2.1
0.9
0.7
0.9
0.75 ± 0.05
#1
#2
#4#3
#2
#1
#3#4
YXXXX
2.2
1.9
1.4
1.2
5.0 ± 0.05
3.2 ± 0.05
2.39
0.8
1.15
1.1
0.75 ± 0.05
#1
#2
#4#3
#2
#1
#3#4
YXXXX
2.54
1.5
1.6
2.2
5.0 ± 0.05
1.4
1.1
5.08
7.0 ± 0.05
2.6
0.90 ± 0.10
YXXXX
5.08
3.81
2.2
2.0
The Smart Timing Choice
The Smart Timing Choice
SiT5001
1-80 MHz MEMS TCXO and VCTCXO
Rev. 0.90 Page 6 of 7 www.sitime.com
Ordering Information
The Part No. Guide is for reference only. To customize and build an exact part number, use the SiTime Part Number
Generator.
Note:
5. SiTime’s SoftEdge™ output waveform with 6 ns rise/fall time reduces EMI and is similar to clipped sine wave in functionality.
Frequency Stability vs. Temperature Range Options
Frequency Stability (PPM) Temperature Range
C (-20 to +70°C) I (-40 to +85°C)
±5 
±2.5 
±2 
±1.5 Contact SiTime
±1 Contact SiTime Contact SiTime
SiT5001AC -2D -18VQ-19.200000T
Part Family
SiT5001
Revision Letter
“A” is the revision
Temperature Range
“I” Industrial, -40 to 85ºC
“C” Commercial, -20 to 70ºC
Frequency Stability
“D” for ±2.5 PPM
“E” for ±5 PPM
Package Size
“2” 3.2 x 2.5 mm
“3” 5.0 x 3.2 mm
“8” 7.0 x 5.0 mm
“B” for ±1.5 PPM
“A” for ±1.0 PPM
Frequency
1.000000 to 80.000000 MHz
Supply Voltage
“18” for 1.8 V ±5%
“25” for 2.5 V ±10%
“28” for 2.8 V ±10%
“33” for 3.3 V ±10%
Packaging
Blank for Bulk
Pull Range Options
“Q” for ±12.5 PPM
“T”: Tape & Reel, 3K reel
“Y”: Tape & Reel, 1K reel
Feature Pin (pin 1)
“V” for Voltage Control
“E” for Output Enable
“S” for Standby
“0” for fixed frequency
(Pin1 = “E”, “S” or “N” options)
(Pin1 = “V” option only)
“N” for No Connect
“30” for 3.0 V ±10%
“M” for ±25 PPM
“B” for ±50 PPM
“G” 2.5 x 2.0 mm
“C” for ±2.0 PPM
Output Waveform
“-“ Default
“C” SoftEdge™ Option[5]
Rev. 0.90 Page 7 of 7 www.sitime.com
© SiTime Corporation 2012. The information contained herein is subject to change at any time without notice. SiTime assumes no responsibility or liability for any loss, damage or defect of a
Product which is caused in whole or in part by (i) use of any circuitry other than circuitry embodied in a SiTime product, (ii) misuse or abuse including static discharge, neglect or accident, (iii)
unauthorized modification or repairs which have been soldered or altered during assembly and are not capable of being tested by SiTime under its normal test conditions, or (iv) improper
installation, storage, handling, warehousing or transportation, or (v) being subjected to unusual physical, thermal, or electrical stress.
Disclaimer: SiTime makes no warranty of any kind, express or implied, with regard to this material, and specifically disclaims any and all express or implied warranties, either in fact or by
operation of law, statutory or otherwise, including the implied warranties of merchantability and fitness for use or a particular purpose, and any implied warranty arising from course of dealing or
usage of trade, as well as any common-law duties relating to accuracy or lack of negligence, with respect to this material, any SiTime product and any product documentation. Products sold by
SiTime are not suitable or intended to be used in a life support application or component, to operate nuclear facilities, or in other mission critical applications where human life may be involved
or at stake. All sales are made conditioned upon compliance with the critical uses policy set forth below.
CRITICAL USE EXCLUSION POLICY
BUYER AGREES NOT TO USE SITIME'S PRODUCTS FOR ANY APPLICATION OR IN ANY COMPONENTS USED IN LIFE SUPPORT DEVICES OR TO OPERATE NUCLEAR FACILITIES
OR FOR USE IN OTHER MISSION-CRITICAL APPLICATIONS OR COMPONENTS WHERE HUMAN LIFE OR PROPERTY MAY BE AT STAKE.
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prohibited.
The Smart Timing Choice
The Smart Timing Choice
1-80 MHz MEMS TCXO and VCTCXO
SiT5001
Additional Information
Document Description Download Link
Manufacturing Notes
Tape & Reel dimension, reflow profile and other manufacturing
related info
http://www.sitime.com/component/docman/doc_download/85-manu
facturing-notes-for-sitime-oscillators
Qualification Reports RoHS report, reliability reports, composition reports http://www.sitime.com/support/quality-and-reliability
Performance Reports
Additional performance data such as phase noise, current
consumption and jitter for selected frequencies
http://www.sitime.com/support/performance-measurement-report
Termination Techniques Termination design recommendations http://www.sitime.com/support/application-notes
Layout Techniques Layout recommendations http://www.sitime.com/support/application-notes