SIT8208AI-31-33E-2.000000T 数据手册
SiT8208
Ultra Performance Oscillator
The Smart Timing Choice
The Smart Timing Choice
Features
Applications
Any frequency between 1 and 80 MHz accurate to 6 decimal places
SATA, SAS, Ethernet, PCI Express, video, WiFi
100% pin-to-pin drop-in replacement to quartz-based oscillators
Computing, storage, networking, telecom, industrial control
Ultra low phase jitter: 0.5 ps (12 kHz to 20 MHz)
Frequency stability as low as ±10 PPM
Industrial or extended commercial temperature range
LVCMOS/LVTTL compatible output
Standard 4-pin packages: 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
Outstanding silicon reliability of 2 FIT or 500 million hour MTBF
Pb-free, RoHS and REACH compliant
Ultra short lead time
Electrical Characteristics[1]
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Frequency Range
Output Frequency Range
f
1
–
80
MHz
Frequency Stability and Aging
Frequency Stability
First year Aging
F_stab
F_aging
10-year Aging
-10
–
+10
PPM
-20
–
+20
PPM
-25
–
+25
PPM
-50
–
+50
PPM
-1.5
–
+1.5
PPM
25°C
-5
–
+5
PPM
25°C
Inclusive of Initial tolerance at 25 °C, and variations over
operating temperature, rated power supply voltage and load
Operating Temperature Range
Operating Temperature Range
T_use
-20
–
+70
°C
Extended Commercial
-40
–
+85
°C
Industrial
Supply Voltage and Current Consumption
Supply Voltage
Current Consumption
Vdd
Idd
OE Disable Current
I_OD
Standby Current
I_std
1.71
1.8
1.89
V
2.25
2.5
2.75
V
2.52
2.8
3.08
V
2.97
3.3
3.63
V
–
31
33
mA
–
29
31
mA
No load condition, f = 20 MHz, Vdd = 1.8V
–
–
31
mA
Vdd = 2.5V, 2.8V or 3.3V, OE = GND, output is Weakly Pulled
Down
–
–
30
mA
Vdd = 1.8 V. OE = GND, output is Weakly Pulled Down
–
–
70
A
Vdd = 2.5V, 2.8V or 3.3V, ST = GND, output is Weakly Pulled
Down
–
10
A
Vdd = 1.8 V. ST = GND, output is Weakly Pulled Down
–
Supply voltages between 2.5V and 3.3V can be supported.
Contact SiTime for additional information.
No load condition, f = 20 MHz, Vdd = 2.5V, 2.8V or 3.3V
LVCMOS Output Characteristics
Duty Cycle
DC
45
–
55
%
Rise/Fall Time
Tr, Tf
–
1.2
2
ns
Output Voltage High
VOH
90%
–
–
Vdd
Output Voltage Low
VOL
–
–
10%
Vdd
15 pF load, 10% - 90% Vdd
IOH = -6 mA, IOL = 6 mA, (Vdd = 3.3V, 2.8V, 2.5V)
IOH = -3 mA, IOL = 3 mA, (Vdd = 1.8V)
Input Characteristics
Input Voltage High
VIH
70%
–
–
Vdd
Pin 1, OE or ST
Input Voltage Low
VIL
–
–
30%
Vdd
Pin 1, OE or ST
Input Pull-up Impedance
Z_in
–
100
250
kΩ
Pin 1, OE logic high or logic low, or ST logic high
2
–
–
MΩ
Pin 1, ST logic low
Note:
1. All electrical specifications in the above table are specified with 15 pF output load and for all Vdd(s) unless otherwise stated.
SiTime Corporation
Rev. 1.02
990 Almanor Avenue
Sunnyvale, CA 94085
(408) 328-4400
www.sitime.com
Revised June 24, 2013
SiT8208
Ultra Performance Oscillator
The Smart Timing Choice
The Smart Timing Choice
Electrical Characteristics[1] (Continued)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Startup and Resume Timing
Startup Time
OE Enable/Disable Time
Resume Time
T_start
–
7
10
ms
Measured from the time Vdd reaches its rated minimum value
T_oe
–
–
150
ns
f = 80 MHz, For other frequencies, T_oe = 100 ns + 3 cycles
T_resume
–
6
10
ms
In standby mode, measured from the time ST pin crosses 50%
threshold. Refer to Figure 5.
T_jitt
–
1.5
2
–
2
3
ps
f = 75 MHz, Vdd = 1.8V
–
0.5
1
ps
f = 10 MHz, Integration bandwidth = 12 kHz to 20 MHz
Jitter
RMS Period Jitter
RMS Phase Jitter (random)
T_phj
ps
Note:
1. All electrical specifications in the above table are specified with 15 pF output load and for all Vdd(s) unless otherwise stated.
Pin Configuration
Pin
1
Symbol
Functionality
Top View
Output
Enable
H or Open[2]: specified frequency output
L: output is high impedance. Only output driver is disabled.
Standby
H or Open[2]: specified frequency output
L: output is low (weak pull down). Device goes to sleep mode. Supply
current reduces to I_std.
OE/ ST
OE/ST
1
4
VDD
GND
2
3
OUT
Electrical ground[3]
2
GND
Power
3
OUT
Output
Oscillator output
4
VDD
Power
Power supply voltage[3]
Notes:
2. A pull-up resistor of