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 Average 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 ......................................................................................................................................................................... 36
Rev 0.52
Page 3 of 36
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SiT5146
1 MHz to 60 MHz, ±0.5 to ±2.5 ppm, Endura™ Series Super-TCXO
Electrical Characteristics
PRELIMINARY
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 3.3V Vdd.
Table 1. Output Characteristics
Parameters
Nominal Output Frequency Range
Operating Temperature Range
Symbol
F_nom
T_use
Min.
1
-20
-40
-40
Acceleration (g) sensitivity, Gamma
Vector
F_g
–
–
Typ.
–
–
–
–
Max.
60
+70
+85
+105
Unit
MHz
°C
°C
°C
Extended Commercial, ambient temperature
Industrial, ambient temperature
Extended Industrial, ambient temperature
Ultra-low sensitivity grade; total gamma over 3 axes; 15 Hz
to 2 kHz; MIL-PRF-55310, computed per section 4.8.18.3.1
Low sensitivity grade; total gamma over 3 axes; 15 Hz to
2 kHz; MIL-PRF-55310, computed per section 4.8.18.3.1
Referenced to (max frequency + min frequency)/2 over the
rated temperature range. Vc=Vdd/2 for VCTCXO
Condition
Frequency Coverage
Temperature Range
Rugged Characteristics
0.004
–
0.009
0.1
ppb/g
ppb/g
Frequency Stability
Frequency Stability over
Temperature
F_stab
-0.5
-1.0
-2.5
Initial Tolerance
Supply Voltage Sensitivity
F_init
F_Vdd
-1
-16.25
-32.50
-65.0
Output Load Sensitivity
F_load
-2.75
-5.50
-11.00
Frequency vs. Temperature Slope
ΔF/ΔT
-25
-50
-100
Dynamic Frequency Change during
Temperature Ramp
F_dynamic
-0.21
-0.42
-0.83
One-Year Aging
20-Year Aging
F_1y
F_20y
–
–
–
–
–
–
±7.10
±11.83
±28.40
±0.81
±1.35
±3.24
±15
±25
±60
±0.13
±0.21
±0.50
±1
±2
+0.5
+1.0
+2.5
+1
+16.25
+32.50
+65.0
+2.75
+5.50
+11.00
+25
+50
+100
+0.21
+0.42
+0.83
–
–
ppm
ppm
ppm
ppm
ppb
ppb
ppb
ppb
ppb
ppb
ppb/°C
ppb/°C
ppb/°C
ppb/s
ppb/s
ppb/s
ppm
ppm
Initial frequency at 25°C inclusive of solder-down shift
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