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SiT8919B Datasheet Preview

SiT8919B Datasheet

High Temperature Oscillator

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SiT8919B
High Frequency, High Temperature Oscillator
TThhee SSmmaarrtt TTiimmiinngg CChhooiiccee
Features
Applications
Frequencies between 115.194001 MHz to 137 MHz accurate to 6
decimal places
Operating temperature from -40°C to 125°C. For -55°C option, refer
to SiT8920 and SiT8921
Supply voltage of 1.8V or 2.5V to 3.3V
Excellent total frequency stability as low as ±20 ppm
Low power consumption of 4.9 mA typical at 1.8V
LVCMOS/LVTTL compatible output
Industry-standard packages: 2.0 x 1.6, 2.5 x 2.0, 3.2 x 2.5, 5.0 x 3.2,
7.0 x 5.0 mm x mm
Instant samples with Time Machine II and field programmable
oscillators
RoHS and REACH compliant, Pb-free, Halogen-free and
Antimony-free
For AEC-Q100 oscillators, refer to SiT8924 and SiT8925
Industrial, medical, non AEC-Q100 automotive, avionics and
other high temperature applications
Industrial sensors, PLC, motor servo, outdoor networking
equipment, medical video cam, asset tracking systems, etc.
Electrical Specifications
Table 1. 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 nominal supply voltage.
Parameters
Output Frequency Range
Frequency Stability
Operating Temperature Range
(ambient)
Supply Voltage
Current Consumption
OE Disable Current
Standby Current
Duty Cycle
Rise/Fall Time
Output High Voltage
Output Low Voltage
Symbol
f
F_stab
T_use
Vdd
Idd
I_od
I_std
DC
Tr, Tf
VOH
VOL
Min.
115.194001
Typ.
Max.
Unit
Frequency Range
– 137 MHz
Condition
Refer to Table 13 for the exact list of supported frequencies
list of supported frequencies
Frequency Stability and Aging
-20 – +20 ppm Inclusive of Initial tolerance at 25°C, 1st year aging at 25°C, and
-25
+25
ppm
variations over operating temperature, rated power supply
voltage and load (15 pF ± 10%).
-30 – +30 ppm
-50 – +50 ppm
Operating Temperature Range
-40
+105
°C Extended Industrial
-40
+125
°C Automotive
Supply Voltage and Current Consumption
1.62
1.8 1.98
V
2.25
2.5 2.75
V
2.52
2.8 3.08
V
2.7 3.0 3.3 V
2.97
3.3 3.63
V
2.25
3.63
V
– 6.2 8 mA No load condition, f = 125 MHz, Vdd = 2.8V, 3.0V or 3.3V
– 5.4 7 mA No load condition, f = 125 MHz, Vdd = 2.5V
– 4.9 6 mA No load condition, f = 125 MHz, Vdd = 1.8V
– – 4.7 mA Vdd = 2.5V to 3.3V, OE = Low, Output in high Z state.
– – 4.5 mA Vdd = 1.8V, OE = Low, Output in high Z state.
– 2.6 8.5 A Vdd = 2.8V to 3.3V, ST = Low, Output is weakly pulled down
– 1.4 5.5 A Vdd = 2.5V, ST = Low, Output is weakly pulled down
– 0.6 4.0 A Vdd = 1.8V, ST = Low, Output is weakly pulled down
LVCMOS Output Characteristics
45 – 55 % All Vdds
– 1.0 2.0 ns Vdd = 2.5V, 2.8V, 3.0V or 3.3V, 20% - 80%
– 1.3 2.5 ns Vdd =1.8V, 20% - 80%
– 1.0 3 ns Vdd = 2.25V - 3.63V, 20% - 80%
90%
– Vdd IOH = -4 mA (Vdd = 3.0V or 3.3V)
IOH = -3 mA (Vdd = 2.8V or 2.5V)
IOH = -2 mA (Vdd = 1.8V)
10%
Vdd IOL = 4 mA (Vdd = 3.0V or 3.3V)
IOL = 3 mA (Vdd = 2.8V or 2.5V)
IOL = 2 mA (Vdd = 1.8V)
SiTime Corporation
Rev. 1.01
990 Almanor Avenue, Sunnyvale, CA 94085
(408) 328-4400
www.sitime.com
Revised June 18, 2015




Sitime

SiT8919B Datasheet Preview

SiT8919B Datasheet

High Temperature Oscillator

No Preview Available !

SiT8919B
High Frequency, High Temperature Oscillator
TThhee SSmmaarrtt TTiimmiinngg CChhooiiccee
Table 1. Electrical Characteristics (continued)
Parameters
Input High Voltage
Input Low Voltage
Input Pull-up Impedence
Startup Time
Enable/Disable Time
Resume Time
RMS Period Jitter
Peak-to-peak Period Jitter
RMS Phase Jitter (random)
Symbol
Min.
VIH
VIL
Z_in
70%
50
2
T_start
T_oe
T_resume
T_jitt
T_pk
T_phj
Typ.
Max.
Unit
Input Characteristics
– – Vdd
30%
Vdd
87 150 k
– – M
Startup and Resume Timing
– 5 ms
– 130 ns
– 5 ms
Jitter
1.6 2.5
ps
1.8 3 ps
12 20 ps
14 30 ps
0.5 0.8
ps
1.3 2 ps
Condition
Pin 1, OE or ST
Pin 1, OE or ST
Pin 1, OE logic high or logic low, or ST logic high
Pin 1, ST logic low
Measured from the time Vdd reaches its rated minimum value
f = 115.194001 MHz. For other frequencies, T_oe = 100 ns + 3 *
clock periods
Measured from the time ST pin crosses 50% threshold
f = 125 MHz, Vdd = 2.5V, 2.8V, 3.0V or 3.3V
f = 125 MHz, Vdd = 1.8V
f = 125 MHz, Vdd = 2.5V, 2.8V, 3.0V or 3.3V
f = 125 MHz, Vdd = 1.8V
f = 125 MHz, Integration bandwidth = 900 kHz to 7.5 MHz
f = 125 MHz, Integration bandwidth = 12 kHz to 20 MHz
Table 2. Pin Description
Pin Symbol
Functionality
Output
Enable
H[1]: specified frequency output
L: output is high impedance. Only output driver is disabled.
H[1]: specified frequency output
1 OE/ ST/NC Standby L: output is low (weak pull down). Device goes to sleep mode. Supply
current reduces to I_std.
No Connect
Any voltage between 0 and Vdd or Open[1]: Specified frequency
output. Pin 1 has no function.
2
GND
Power
Electrical ground
3
OUT
Output Oscillator output
4
VDD
Power
Power supply voltage[2]
Notes:
1. In OE or ST mode, a pull-up resistor of 10kohm or less is recommended if pin 1 is not externally driven.
If pin 1 needs to be left floating, use the NC option.
2. A capacitor of value 0.1 µF or higher between Vdd and GND is required.
Top View
OE/ST/NC 1
4 VDD
GND 2
3 OUT
Figure 1. Pin Assignments
Rev. 1.01
Page 2 of 13
www.sitime.com


Part Number SiT8919B
Description High Temperature Oscillator
Maker Sitime
Total Page 18 Pages
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