5.0 mm x 3.2 mm Package Pinout ............................................................................................................................................... 1
Ordering Information .................................................................................................................................................................... 2
Device Configurations and Pin-outs ............................................................................................................................................. 9
Pin-out Top Views................................................................................................................................................................. 9
Test Circuit Diagrams for LVCMOS and Clipped Sinewave Outputs ......................................................................................... 10
Frequency Stability ............................................................................................................................................................. 16
Output Frequency and Format ............................................................................................................................................ 16
Output Frequency Tuning ................................................................................................................................................... 16
Pin 1 Configuration (OE, VC, or NC) .................................................................................................................................. 17
Control Voltage Bandwidth ................................................................................................................................................. 20
Pull Range and Absolute Pull Range .................................................................................................................................. 22
Output Frequency ............................................................................................................................................................... 23
I
2
C Control Registers .......................................................................................................................................................... 25
Serial Interface Configuration Description .......................................................................................................................... 28
Serial Signal Format ........................................................................................................................................................... 28
Parallel Signal Format ........................................................................................................................................................ 29
Parallel Data Format ........................................................................................................................................................... 29
I
2
C Timing Specification ...................................................................................................................................................... 31
I
2
C Device Address Modes ................................................................................................................................................. 32
Schematic Example ............................................................................................................................................................ 33
Dimensions and Patterns ........................................................................................................................................................... 34
Additional Information ................................................................................................................................................................ 36
Revision History ......................................................................................................................................................................... 37
Rev 1.04
Page 3 of 38
www.sitime.com
SiT5155
±0.5 ppm, Elite Platform™ Super-TCXO for GNSS/GPS
Electrical Characteristics
All Min and Max limits are specified over temperature and rated operating voltage with 15 pF output load unless otherwise
stated. Typical values are at 25°C and 3.3 V Vdd.
Table 1. Output Characteristics
Parameters
Nominal Output Frequency Range
Symbol
F_nom
Min.
Typ.
Max.
Unit
MHz
Condition
Frequency Coverage
10.000000, 10.949297
16.367600, 16.367667
16.368000, 16.369000
16.384000, 20.000000
24.553500, 25.000000
26.000000, 40.000000
Temperature Range
Operating Temperature Range
T_use
-20
-40
-40
Frequency Stability over
Temperature
Initial Tolerance
Supply Voltage Sensitivity
Output Load Sensitivity
Frequency vs. Temperature Slope
Dynamic Frequency Change during
Temperature Ramp
One-Year Aging
20-Year Aging
F_stab
F_init
F_Vdd
F_load
ΔF/ΔT
F_dynamic
F_1y
F_20y
–
–
–
–
–
–
–
–
–
–
–
–
–
±7.10
±0.81
±15
±0.13
±1
±2
+70
+85
+105
±0.5
±1
±16.25
±2.75
±25
±0.21
–
–
°C
°C
°C
ppm
ppm
ppb
ppb
ppb/°C
ppb/s
ppm
ppm
Extended Commercial, ambient temperature
Industrial, ambient temperature
Extended Industrial, ambient temperature
Referenced to (max frequency + min frequency)/2 over the
rated temperature range. Vc=Vdd/2 for VCTCXO
Initial frequency at 25°C at 48 hours after 2 reflows
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