SiT8924B
Automotive AEC-Q100 Oscillator
Features
Applications
AEC-Q100 with extended temperature range (-55°C to 125°C)
Frequencies between 1 MHz and 110 MHz accurate to
6 decimal places
Supply voltage of 1.8V or 2.25V to 3.63V
Excellent total frequency stability as low as ±20 ppm
Industry best G-sensitivity of 0.1 PPB/G
Low power consumption of 3.8 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
RoHS and REACH compliant, Pb-free, Halogen-free and
Antimony-free
Automotive, extreme temperature and other high-rel
electronics
Infotainment systems, collision detection devices, and
in-vehicle networking
Powertrain control
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
Output Frequency Range
Frequency Stability
Symbol
f
F_stab
Min.
1
-20
-25
-30
-50
Operating Temperature
Range (ambient)
T_use
-40
-40
-40
-55
Supply Voltage
Current Consumption
Vdd
Idd
1.62
2.25
–
–
45
–
–
90%
Output Low Voltage
VOL
–
–
10%
Vdd
Typ.
–
–
–
–
–
–
–
–
–
Max.
110
+20
+25
+30
+50
+85
+105
+125
+125
Unit
MHz
ppm
ppm
ppm
ppm
°C
°C
°C
°C
Industrial, AEC-Q100 Grade 3
Extended Industrial, AEC-Q100 Grade 2
Automotive, AEC-Q100 Grade 1
Extended Temperature, AEC-Q100
Condition
Refer to
Table 13 and Table 14
for a list supported frequencies
Inclusive of Initial tolerance at 25°C, 1st year aging at 25°C, and
variations over operating temperature, rated power supply
voltage and load (15 pF ± 10%).
Frequency Range
Frequency Stability and Aging
Operating Temperature Range
Supply Voltage and Current Consumption
All voltages between 2.25V and 3.63V including 2.5V, 2.8V, 3.0V
1.8
1.98
V
and 3.3V are supported.
–
3.63
V
4.0
4.8
mA
No load condition, f = 20 MHz, Vdd = 2.25V to 3.63V
3.8
4.5
mA
No load condition, f = 20 MHz, Vdd = 1.8V
LVCMOS Output Characteristics
–
1.5
1.3
–
55
3
2.5
–
%
ns
ns
Vdd
All Vdds
Vdd = 2.25V - 3.63V, 20% - 80%
Vdd = 1.8V, 20% - 80%
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)
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)
Duty Cycle
Rise/Fall Time
Output High Voltage
DC
Tr, Tf
VOH
Input High Voltage
Input Low Voltage
Input Pull-up Impedence
Startup Time
Enable/Disable Time
RMS Period Jitter
RMS Phase Jitter (random)
VIH
VIL
Z_in
T_start
T_oe
T_jitt
T_phj
70%
–
–
–
–
–
–
–
–
Input Characteristics
–
–
Vdd
Pin 1, OE
–
30%
Vdd
Pin 1, OE
kΩ
100
–
Pin 1, OE logic high or logic low
Startup and Resume Timing
–
–
1.6
1.9
0.5
1.3
10
130
Jitter
2.5
3.0
–
–
ps
ps
ps
ps
f = 75 MHz, 2.25V to 3.63V
f = 75 MHz, 1.8V
f = 75 MHz, Integration bandwidth = 900 kHz to 7.5 MHz
f = 75 MHz, Integration bandwidth = 12 kHz to 20 MHz
ms
ns
Measured from the time Vdd reaches its rated minimum value
f = 110 MHz. For other frequencies, T_oe = 100 ns + 3 * cycles
Rev 1.5
December 14, 2016
www.sitime.com
SiT8924B
Automotive AEC-Q100 Oscillator
Table 2. Pin Description
Pin
Symbol
Output
Enable
No Con-
nect
GND
OUT
VDD
[1]
Functionality
Output Enable
No Connect
Power
Output
Power
H : specified frequency output
L: output is high impedance. Only output driver is disabled.
Any voltage between 0 and Vdd or Open
[1]
: Specified frequency
output. Pin 1 has no function.
Electrical ground
[2]
Oscillator output
Power supply voltage
[2]
GND
OE/NC
Top View
1
4
1
VDD
2
3
4
2
3
OUT
Figure 1. Pin Assignments
Notes:
1. In OE mode, a pull-up resistor of 10k
2. A capacitor of value 0.1 µF or higher between Vdd and GND is required.
option.
s s is re comme nde d if pin 1
or le
Table 3. Absolute Maximum Limits
Attempted operation outside the absolute maximum ratings may cause permanent damage to the part. Actual performance of
the IC is only guaranteed within the operational specifications, not at absolute maximum ratings.
Parameter
Storage Temperature
Vdd
Electrostatic Discharge
Soldering Temperature (follow standard Pb free
soldering guidelines)
Junction Temperature
[3]
Min.
-65
-0.5
–
–
–
Max.
150
4
2000
260
150
Unit
°C
V
V
°C
°C
Note:
3. Exceeding this temperature for extended period of time may damage the device.
Table 4. Thermal Consideration
[4]
Package
7050
5032
3225
2520
2016
θ
JA, 4 Layer Board
(°C/W)
142
97
109
117
152
θ
JA, 2 Layer Board
(°C/W)
273
199
212
222
252
θ
JC, Bottom
(°C/W)
30
24
27
26
36
Note:
4. Refer to JESD51 for
θJA
and
θJC
definitions, and reference layout used to determine the
θJA
and
θJC
values in the above table.
Table 5. Maximum Operating Junction Temperature
[5]
Max Operating Temperature (ambient)
85°C
105°C
125°C
Maximum Operating Junction Temperature
95°C
115°C
135°C
Note:
5. Datasheet specifications are not guaranteed if junction temperature exceeds the maximum operating junction temperature.
Table 6. Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Moisture Sensitivity Level
Rev. 1.5
Condition/Test Method
MIL-STD-883F, Method 2002
MIL-STD-883F, Method 2007
JESD22, Method A104
MIL-STD-883F, Method 2003
MSL1 @ 260°C
Page 2 of 17
www.sitime.com
SiT8924B
Automotive AEC-Q100 Oscillator
Test Circuit and Waveform
[6]
Vdd
Vout
Test
Point
tr
80% Vdd
50%
20% Vdd
High Pulse
(TH)
Period
tf
4
Power
Supply
0.1µF
3
15pF
(including probe
and fixture
capacitance)
1
2
Low Pulse
(TL)
Vdd
OE/NC Function
1k
Ω
Figure 2. Test Circuit
Note:
6. Duty Cycle is computed as Duty Cycle = TH/Period.
Figure 3. Waveform
Timing Diagrams
Vdd
90% Vdd
Vdd
50% Vdd
[7]
T_oe
OE Voltage
Pin 4 Voltage
T_start
No Glitch
during start up
CLK Output
CLK Output
HZ
HZ
T_start: Time to start from power-off
T_oe: Time to re-enable the clock output
Figure 4. Startup Timing (OE Mode)
Figure 5. OE Enable Timing (OE Mode Only)
Vdd
OE Voltage
50% Vdd
T_oe
CLK Output
HZ
T_oe: Time to put the output in High Z mode
Figure 6. OE Disable Timing (OE Mode Only)
Note:
7. SiT8924 has “no runt” pulses and “no glitch” output during startup or resume.
Rev. 1.5
Page 3 of 17
www.sitime.com
DSP 与 ARM 处理器
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
