SiT8008B
Low Power Programmable Oscillator
ow Power, Standard Frequency Oscillator
Features
◼ Any frequency between 1 MHz and 110 MHz accurate to
6 decimal places
◼ 100% pin-to-pin drop-in replacement to quartz-based XO
◼ Excellent total frequency stability as low as ±20 ppm
◼ Operating temperature from -40°C to 85°C. For 125°C and/or
-55°C options, refer to SiT1618, SiT8918, SiT8920
◼ Low power consumption of 3.5 mA typical at 1.8V
◼ Standby mode for longer battery life
◼ Fast startup time of 5 ms
◼ LVCMOS/HCMOS 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
Applications
◼ Ideal for DSC, DVC, DVR, IP CAM, Tablets, e-Books,
SSD, GPON, EPON, etc
◼ Ideal for high-speed serial protocols such as: USB,
SATA, SAS, Firewire, 100M / 1G / 10G Ethernet, etc.
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.
Table 1. Electrical Characteristics
Parameters
Symbol
Min.
Typ.
Max.
Unit
Condition
Frequency Range
Output Frequency Range
f
1
–
110
MHz
Frequency Stability and Aging
Frequency Stability
F_stab
-20
–
+20
ppm
Inclusive of initial tolerance at 25°C, 1st year aging at 25°C, and
variations over operating temperature, rated power supply voltage
and load.
-25
–
+25
ppm
-50
–
+50
ppm
Operating Temperature Range
Operating Temperature Range
T_use
-20
–
+70
°C
Extended Commercial
-40
–
+85
°C
Industrial
Supply Voltage and Current Consumption
Supply Voltage
Vdd
1.62
1.8
1.98
V
Contact SiTime for 1.5V support
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
Current Consumption
Idd
–
3.8
4.5
mA
No load condition, f = 20 MHz, Vdd = 2.8V to 3.3V
–
3.7
4.2
mA
No load condition, f = 20 MHz, Vdd = 2.5V
–
3.5
4.1
mA
No load condition, f = 20 MHz, Vdd = 1.8V
OE Disable Current
I_OD
–
–
4.2
mA
Vdd = 2.5V to 3.3V, OE = GND, Output in high-Z state
–
–
4.0
mA
Vdd = 1.8V, OE = GND, Output in high-Z state
Standby Current
I_std
–
2.1
4.3
A
ST = GND, Vdd = 2.8V to 3.3V, Output is weakly pulled down
–
1.1
2.5
A
ST = GND, Vdd = 2.5V, Output is weakly pulled down
–
0.2
1.3
A
ST = GND, Vdd = 1.8V, Output is weakly pulled down
LVCMOS Output Characteristics
Duty Cycle
DC
45
–
55
%
All Vdds. See Duty Cycle definition in Figure 3 and Footnote 6
Rise/Fall Time
Tr, Tf
–
1
2
ns
Vdd = 2.5V, 2.8V, 3.0V or 3.3V, 20% - 80%
–
1.3
2.5
ns
Vdd =1.8V, 20% - 80%
–
–
2
ns
Vdd = 2.25V - 3.63V, 20% - 80%
Output High Voltage
VOH
90%
–
–
Vdd
IOH = -4 mA (Vdd = 3.0V or 3.3V)
IOH = -3 mA (Vdd = 2.8V and Vdd = 2.5V) IOH = -2 mA (Vdd = 1.8V)
Output Low Voltage
VOL
–
–
10%
Vdd
IOL = 4 mA (Vdd = 3.0V or 3.3V)
IOL = 3 mA (Vdd = 2.8V and Vdd = 2.5V) IOL = 2 mA (Vdd = 1.8V)
1.05 July 8, 2020
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SiT8008B Low Power Programmable Oscillator
1.05
Page 2 of 17
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Table 1. Electrical Characteristics (continued)
Parameters
Symbol
Min.
Typ.
Max.
Unit
Condition
Input Characteristics
Input High Voltage
VIH
70%
–
–
Vdd
Pin 1, OE or ST
Input Low Voltage
VIL
–
–
30%
Vdd
Pin 1, OE or ST
Input Pull-up Impedance
Z_in
50
87
150
k
Pin 1, OE logic high or logic low, or ST logic high
2
–
–
M
Pin 1, ST logic low
Startup and Resume Timing
Startup Time
T_start
–
–
5
ms
Measured from the time Vdd reaches its rated minimum value
Enable/Disable Time
T_oe
–
–
130
ns
f = 110 MHz. For other frequencies, T_oe = 100 ns + 3 * cycles
Resume Time
T_resume
–
–
5
ms
Measured from the time ST pin crosses 50% threshold
Jitter
RMS Period Jitter
T_jitt
–
1.8
3
ps
f = 75 MHz, Vdd = 2.5V, 2.8V, 3.0V or 3.3V
–
1.8
3
ps
f = 75 MHz, Vdd = 1.8V
Peak-to-peak Period Jitter
T_pk
–
12
25
ps
f = 75 MHz, Vdd = 2.5V, 2.8V, 3.0V or 3.3V
–
14
30
ps
f = 75 MHz, Vdd = 1.8V
RMS Phase Jitter (random)
T_phj
–
0.5
0.9
ps
f = 75 MHz, Integration bandwidth = 900 kHz to 7.5 MHz
–
1.3
2
ps
f = 75 MHz, Integration bandwidth = 12 kHz to 20 MHz
Table 2. Pin Description
Pin
Symbol
Functionality
1
OE/ST/NC
Output Enable
H[1]: specified frequency output
L: output is high impedance. Only output driver is disabled.
Standby
H[1]: specified frequency output
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
