554DD000129DG [SILICON]

ECL Output Clock Oscillator, ROHS COMPLIANT PACKAGE-8;
554DD000129DG
型号: 554DD000129DG
厂家: SILICON    SILICON
描述:

ECL Output Clock Oscillator, ROHS COMPLIANT PACKAGE-8

机械 振荡器
文件: 总14页 (文件大小:124K)
中文:  中文翻译
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Si554  
REVISION D  
QUAD FREQUENCY VOLTAGE-CONTROLLED CRYSTAL  
OSCILLATOR (VCXO) 10 MHZ TO 1.4 GHZ  
Features  
Available with any-rate output  
Internal fixed crystal frequency  
ensures high reliability and low  
aging  
Available CMOS, LVPECL,  
LVDS, and CML outputs  
3.3, 2.5, and 1.8 V supply options  
Industry-standard 5 x 7 mm  
package and pinout  
frequencies from 10–945 MHz and  
selected frequencies to 1.4 GHz  
Four selectable output frequencies  
Si5602  
®
3rd generation DSPLL with superior  
jitter performance  
3x better frequency stability than  
SAW-based oscillators  
Pb-free/RoHS-compliant  
Ordering Information:  
Applications  
See page 9.  
SONET/SDH  
xDSL  
10 GbE LAN / WAN  
Low jitter clock generation  
Optical modules  
Clock and data recovery  
Pin Assignments:  
See page 8.  
Description  
The Si554 quad-frequency VCXO utilizes Silicon Laboratories’ advanced  
DSPLL circuitry to provide a very low jitter clock for all output frequencies.  
(Top View)  
®
The Si554 is available with any-rate output frequency from 10 to 945 MHz  
and selected frequencies to 1400 MHz. Unlike traditional VCXOs, where a  
different crystal is required for each output frequency, the Si554 uses one  
fixed crystal frequency to provide a wide range of output frequencies. This  
IC-based approach allows the crystal resonator to provide exceptional  
frequency stability and reliability. In addition, DSPLL clock synthesis  
provides superior supply noise rejection, simplifying the task of generating  
low jitter clocks in noisy environments typically found in communication  
systems. The Si554 IC-based VCXO is factory-configurable for a wide  
variety of user specifications including frequency, supply voltage, output  
format, tuning slope, and temperature stability. Specific configurations are  
factory-programmed at time of shipment, thereby eliminating the long lead  
times associated with custom oscillators.  
FS[1]  
7
VC  
VDD  
1
2
3
6
5
4
OE  
CLK–  
CLK+  
GND  
8
FS[0]  
Functional Block Diagram  
VDD  
CLK- CLK+  
Any-rate  
10–1400 MHz  
DSPLL®  
Fixed  
Frequency XO  
FS0  
FS1  
Clock Synthesis  
ADC  
Vc  
OE  
GND  
Rev. 1.0 1/12  
Copyright © 2012 by Silicon Laboratories  
Si554  
Si554  
1. Electrical Specifications  
Table 1. Recommended Operating Conditions  
Parameter  
Symbol  
Test Condition  
3.3 V option  
2.5 V option  
1.8 V option  
Min  
2.97  
2.25  
1.71  
Typ  
3.3  
2.5  
1.8  
Max  
3.63  
2.75  
1.89  
Units  
1
V
V
V
Supply Voltage  
V
DD  
Supply Current  
Output enabled  
LVPECL  
CML  
130  
117  
108  
98  
120  
108  
99  
mA  
I
DD  
LVDS  
90  
CMOS  
Tristate mode  
0.75 x V  
60  
75  
mA  
V
Output Enable (OE)  
and Frequency Select FS[1:0]  
V
IH  
DD  
2
V
0.5  
85  
V
IL  
Operating Temperature Range  
T
–40  
ºC  
A
Notes:  
1. Selectable parameter specified by part number. See Section 3. "Ordering Information" on page 9 for further details.  
2. OE and FS[1:0] pins include a 17 kresistor to VDD.  
Table 2. VC Control Voltage Input  
Parameter  
Symbol  
Test Condition  
Min  
Typ  
Max  
Units  
1,2,3  
Control Voltage Tuning Slope  
10 to 90% of V  
33  
45  
ppm/V  
DD  
90  
K
V
135  
180  
356  
4
Control Voltage Linearity  
BSL  
–5  
–10  
9.3  
500  
±1  
±5  
+5  
+10  
10.7  
%
%
L
VC  
Incremental  
Modulation Bandwidth  
BW  
10.0  
kHz  
k  
V
V Input Impedance  
Z
C
VC  
Nominal Control Voltage  
V
@ f  
V /2  
DD  
CNOM  
O
Control Voltage Tuning Range  
V
0
V
V
C
DD  
Notes:  
1. Positive slope; selectable option by part number. See Section 3. "Ordering Information" on page 9.  
2. For best jitter and phase noise performance, always choose the smallest KV that meets the application’s minimum APR  
requirements. See “AN266: VCXO Tuning Slope (KV), Stability, and Absolute Pull Range (APR)” for more information.  
3. KV variation is ±10% of typical values.  
4. BSL determined from deviation from best straight line fit with VC ranging from 10 to 90% of VDD. Incremental slope  
determined with VC ranging from 10 to 90% of VDD  
.
2
Rev. 1.0  
Si554  
Table 3. CLK± Output Frequency Characteristics  
Parameter  
Symbol  
Test Condition  
LVDS/CML/LVPECL  
CMOS  
Min  
10  
Typ  
Max  
Units  
MHz  
MHz  
1,2,3  
f
945  
160  
O
Nominal Frequency  
10  
1,4  
Temperature Stability  
T = –40 to +85 °C  
–20  
–50  
–100  
+20  
+50  
+100  
A
ppm  
1,4  
Absolute Pull Range  
Aging  
APR  
tOSC  
±12  
±375  
±3  
ppm  
ppm  
Frequency drift over first year.  
Frequency drift over 15 year life.  
±10  
10  
5
Power up Time  
ms  
ms  
Settling Time After FS[1:0]  
Change  
t
Both FS[1] and FS[0] changing  
simultaneously  
20  
FRQ  
Notes:  
1. See Section 3. "Ordering Information" on page 9 for further details.  
2. Specified at time of order by part number. Also available in frequencies from 970 to 1134 MHz and 1213 to 1417 MHz.  
3. Nominal output frequency set by VCNOM = VDD/2.  
4. Selectable parameter specified by part number.  
5. Time from power up or tristate mode to fO (to within ±1 ppm of fO).  
Table 4. CLK± Output Levels and Symmetry  
Parameter  
Symbol  
Test Condition  
mid-level  
Min  
VDD – 1.42  
1.1  
Typ  
Max  
VDD – 1.25  
1.9  
Units  
V
1
LVPECL Output Option  
V
O
VOD  
VSE  
swing (diff)  
VPP  
VPP  
swing (single-ended)  
mid-level  
0.55  
0.95  
2
LVDS Output Option  
V
O
1.125  
0.5  
1.20  
0.7  
1.275  
0.9  
V
swing (diff)  
VOD  
VO  
VPP  
2
CML Output Option  
2.5/3.3 V option mid-level  
1.8 V option mid-level  
V
V
– 1.30  
V
DD  
– 0.36  
V
DD  
2.5/3.3 V option swing (diff)  
1.8 V option swing (diff)  
1.10  
1.50  
1.90  
VPP  
VPP  
VOD  
0.35  
0.425  
0.50  
VDD  
0.4  
3
VOH  
VOL  
0.8 x VDD  
CMOS Output Option  
I
= 32 mA  
OH  
V
IOL = 32 mA  
Rise/Fall time (20/80%)  
Symmetry (duty cycle)  
tR, F  
t
LVPECL/LVDS/CML  
350  
ps  
ns  
CMOS with C = 15 pF  
1
L
SYM  
LVPECL:  
(diff)  
V
– 1.3 V  
DD  
45  
55  
%
LVDS:  
CMOS:  
1.25 V (diff)  
/2  
V
DD  
Notes:  
1. 50 to VDD – 2.0 V.  
2. Rterm = 100 (differential).  
3. CL = 15 pF  
Rev. 1.0  
3
Si554  
Table 5. CLK± Output Phase Jitter  
Parameter  
Symbol  
Test Condition  
Kv = 33 ppm/V  
Min  
Typ  
Max  
Units  
1,2,3  
Phase Jitter (RMS)  
for F > 500 MHz  
J  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.26  
0.26  
ps  
OUT  
Kv = 45 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.27  
0.26  
ps  
ps  
ps  
ps  
ps  
Kv = 90 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.32  
0.26  
Kv = 135 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.40  
0.27  
Kv = 180 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.49  
0.28  
Kv = 356 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.87  
0.33  
Notes:  
1. Refer to AN255, AN256, and AN266 for further information.  
2. For best jitter and phase noise performance, always choose the smallest KV that meets the application’s minimum APR  
requirements. See “AN266: VCXO Tuning Slope (KV), Stability, and Absolute Pull Range (APR)” for more information.  
3. See “AN255: Replacing 622 MHz VCSO devices with the Si550 VCXO” for comparison highlighting power supply  
rejection (PSR) advantage of Si55x versus SAW-based solutions.  
4. Max jitter for LVPECL output with VC=1.65V, VDD=3.3V, 155.52 MHz.  
5. Max offset frequencies: 80 MHz for FOUT > 250 MHz, 20 MHz for 50 MHz < FOUT <250 MHz,  
2 MHz for 10 MHz < FOUT <50 MHz.  
4
Rev. 1.0  
Si554  
Table 5. CLK± Output Phase Jitter (Continued)  
Parameter  
Symbol  
Test Condition  
Kv = 33 ppm/V  
Min  
Typ  
Max  
Units  
1,2,3,4,5  
Phase Jitter (RMS)  
for F of 125 to 500 MHz  
J  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.37  
0.33  
ps  
OUT  
Kv = 45 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.37  
0.33  
0.4  
ps  
ps  
ps  
ps  
ps  
Kv = 90 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.43  
0.34  
Kv = 135 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.50  
0.34  
Kv = 180 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
0.59  
0.35  
Kv = 356 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 80 MHz (OC-192)  
1.00  
0.39  
Notes:  
1. Refer to AN255, AN256, and AN266 for further information.  
2. For best jitter and phase noise performance, always choose the smallest KV that meets the application’s minimum APR  
requirements. See “AN266: VCXO Tuning Slope (KV), Stability, and Absolute Pull Range (APR)” for more information.  
3. See “AN255: Replacing 622 MHz VCSO devices with the Si550 VCXO” for comparison highlighting power supply  
rejection (PSR) advantage of Si55x versus SAW-based solutions.  
4. Max jitter for LVPECL output with VC=1.65V, VDD=3.3V, 155.52 MHz.  
5. Max offset frequencies: 80 MHz for FOUT > 250 MHz, 20 MHz for 50 MHz < FOUT <250 MHz,  
2 MHz for 10 MHz < FOUT <50 MHz.  
Rev. 1.0  
5
Si554  
Table 5. CLK± Output Phase Jitter (Continued)  
Parameter  
Symbol  
Test Condition  
Kv = 33 ppm/V  
Min  
Typ  
Max  
Units  
1,2,5  
Phase Jitter (RMS)  
for F 10 to 160 MHz  
J  
12 kHz to 20 MHz (OC-48)  
50 kHz to 20 MHz  
0.63  
0.62  
ps  
OUT  
CMOS Output Only  
Kv = 45 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 20 MHz  
0.63  
0.62  
ps  
ps  
ps  
ps  
ps  
Kv = 90 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 20 MHz  
0.67  
0.66  
Kv = 135 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 20 MHz  
0.74  
0.72  
Kv = 180 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 20 MHz  
0.83  
0.8  
Kv = 356 ppm/V  
12 kHz to 20 MHz (OC-48)  
50 kHz to 20 MHz  
1.26  
1.2  
Notes:  
1. Refer to AN255, AN256, and AN266 for further information.  
2. For best jitter and phase noise performance, always choose the smallest KV that meets the application’s minimum APR  
requirements. See “AN266: VCXO Tuning Slope (KV), Stability, and Absolute Pull Range (APR)” for more information.  
3. See “AN255: Replacing 622 MHz VCSO devices with the Si550 VCXO” for comparison highlighting power supply  
rejection (PSR) advantage of Si55x versus SAW-based solutions.  
4. Max jitter for LVPECL output with VC=1.65V, VDD=3.3V, 155.52 MHz.  
5. Max offset frequencies: 80 MHz for FOUT > 250 MHz, 20 MHz for 50 MHz < FOUT <250 MHz,  
2 MHz for 10 MHz < FOUT <50 MHz.  
Table 6. CLK± Output Period Jitter  
Parameter  
Period Jitter*  
Symbol  
Test Condition  
RMS  
Min  
Typ  
2
Max  
Units  
ps  
J
PER  
Peak-to-Peak  
14  
ps  
*Note: Any output mode, including CMOS, LVPECL, LVDS, CML. N = 1000 cycles. Refer to AN279 for further information.  
6
Rev. 1.0  
Si554  
Table 7. CLK± Output Phase Noise (Typical)  
Offset Frequency  
74.25 MHz  
90 ppm/V  
LVPECL  
491.52 MHz  
45 ppm/V  
LVPECL  
622.08 MHz  
135 ppm/V  
LVPECL  
Units  
100 Hz  
1 kHz  
10 kHz  
100 kHz  
1 MHz  
–87  
–114  
–132  
–142  
–148  
–150  
n/a  
–75  
–65  
–90  
–100  
–116  
–124  
–135  
–146  
–147  
–109  
–121  
–134  
–146  
–147  
dBc/Hz  
10 MHz  
100 MHz  
Table 8. Environmental Compliance  
The Si554 meets the following qualification test requirements.  
Parameter  
Mechanical Shock  
Conditions/Test Method  
MIL-STD-883F, Method 2002.3 B  
MIL-STD-883F, Method 2007.3 A  
MIL-STD-883F, Method 203.8  
MIL-STD-883F, Method 1014.7  
MIL-STD-883F, Method 2016  
J-STD-020, MSL 1  
Mechanical Vibration  
Solderability  
Gross & Fine Leak  
Resistance to Solvents  
Moisture Sensitivity Level  
Contact Pads  
J-STD-020, MSL 1  
Table 9. Absolute Maximum Ratings1  
Parameter  
Maximum Operating Temperature  
Supply Voltage, 1.8 V Option  
Supply Voltage, 2.5/3.3 V Option  
Input Voltage (any input pin)  
Symbol  
Rating  
85  
Units  
T
ºC  
AMAX  
V
V
–0.5 to +1.9  
–0.5 to +3.8  
V
DD  
DD  
V
V
–0.5 to V + 0.3  
V
ºC  
I
DD  
Storage Temperature  
T
–55 to +125  
2000  
S
ESD Sensitivity (HBM, per JESD22-A114)  
ESD  
V
2
Soldering Temperature (Pb-free profile)  
T
260  
ºC  
PEAK  
2
Soldering Temperature Time @ T  
(Pb-free profile)  
t
20–40  
seconds  
PEAK  
P
Notes:  
1. Stresses beyond those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional  
operation or specification compliance is not implied at these conditions. Exposure to maximum rating conditions for  
extended periods may affect device reliability.  
2. The device is compliant with JEDEC J-STD-020C. Refer to Si5xx Packaging FAQ available for download from  
www.silabs.com/VCXO for further information, including soldering profiles.  
Rev. 1.0  
7
Si554  
2. Pin Descriptions  
(Top View)  
FS[1]  
7
VC  
VDD  
1
6
5
4
OE  
2
3
CLK–  
CLK+  
GND  
8
FS[0]  
Table 10. Si554 Pin Descriptions  
Type  
Pin  
Name  
Function  
Control Voltage  
1
V
Analog Input  
C
Output Enable (Polarity = High):  
0 = clock output disabled (outputs tri-stated)  
1 = clock output enabled  
2
OE*  
Input  
Electrical and Case Ground  
Oscillator Output  
3
4
GND  
Ground  
Output  
Output  
CLK+  
Complementary Output  
(N/C for CMOS)  
CLK–  
(N/A for CMOS)  
5
Power Supply Voltage  
Frequency Select MSB  
Frequency Select LSB  
6
7
8
V
Power  
Input  
Input  
DD  
FS[1]*  
FS[0]*  
*Note: FS[1:0] and OE include a 17 kpullup resistor to VDD. Output Enable polarity selectable at time of order. See Section  
3. "Ordering Information" on page 9 for details on frequency select and OE polarity ordering options.  
8
Rev. 1.0  
Si554  
3. Ordering Information  
The Si554 supports a variety of options including frequency, temperature stability, tuning slope, output format, and  
Specific device configurations are programmed into the Si554 at time of shipment. Configurations are  
V
.
DD  
specified using the Part Number Configuration chart shown below. Silicon Labs provides a web browser-based part  
number configuration utility to simplify this process. Refer to www.silabs.com/VCXOPartNumber to access this tool  
and for further ordering instructions. The Si554 VCXO series is supplied in an industry-standard, RoHS-compliant,  
lead-free, 8-pad, 5 x 7 mm package. Tape and reel packaging is an ordering option.  
X
X
D
G
R
554  
XXXXXX  
R = Tape & Reel  
Blank = Trays  
554 Quad VCXO  
Product Family  
Operating Temp Range (°C)  
–40 to +85 °C  
G
Device Revision Letter  
6-digit Frequency Designator Code  
Four unique frequencies can be specified within the following bands of frequencies: 10 to  
945 MHz, 970 to 1134 MHz, and 1213 to 1417 MHz. A six digit code will be assigned for  
the specified combination of frequencies. Codes > 000100 refer to XOs programmed with  
the lowest frequency value selected when FS[1:0] = 00, and the highest value when  
FS[1:0] = 11. Six digit codes < 000100 refer to XOs programmed with the highest  
frequency value selected when FS[1:0] = 00, and the lowest value when FS[1:0] = 11.  
1st Option Code  
VDD Output Format Output Enable Polarity  
2nd Option Code  
A
B
C
D
E
F
G
H
J
K
M
N
P
Q
R
S
T
3.3 LVPECL  
3.3 LVDS  
3.3 CMOS  
3.3 CML  
2.5 LVPECL  
2.5 LVDS  
2.5 CMOS  
2.5 CML  
1.8 CMOS  
1.8 CML  
3.3 LVPECL  
3.3 LVDS  
3.3 CMOS  
3.3 CML  
2.5 LVPECL  
2.5 LVDS  
2.5 CMOS  
2.5 CML  
1.8 CMOS  
1.8 CML  
High  
High  
High  
High  
High  
High  
High  
High  
High  
High  
Low  
Low  
Low  
Low  
Low  
Low  
Low  
Low  
Low  
Low  
Temperature  
Stability  
± ppm (max)  
Tuning Slope  
Minimum APR  
(±ppm) for VDD @  
Kv  
ppm/V (typ)  
180  
Code  
A
B
C
D
E
F
G
H
J
K
M
3.3 V  
100  
30  
150  
80  
2.5 V  
75  
Note 6  
125  
30  
Note 6  
75  
300  
145  
104  
220  
1.8 V  
25  
Note 6  
75  
25  
Note 6  
50  
235  
105  
70  
155  
100  
100  
50  
50  
20  
50  
20  
20  
20  
90  
180  
90  
45  
135  
356  
180  
135  
25  
100  
375  
185  
130  
295  
12  
100  
20  
356  
33  
Note 6  
Note 6  
Notes:  
1. For best jitter and phase noise performance, always choose the smallest Kv that meets  
the application’s minimum APR requirements. Unlike SAW-based solutions which  
require higher higher Kv values to account for their higher temperature dependence,  
the Si55x series provides lower Kv options to minimize noise coupling and jitter in real-  
world PLL designs. See AN255 and AN266 for more information.  
2. APR is the ability of a VCXO to track a signal over the product lifetime. A VCXO with an  
APR of ±25 ppm is able to lock to a clock with a ±25 ppm stability over 15 years over all  
operating conditions.  
U
V
W
Note:  
CMOS available to 160 MHz.  
3. Nominal Pull range (±) = 0.5 x VDD x tuning slope.  
4. Nominal Absolute Pull Range (±APR) = Pull range – stability – lifetime aging  
=0.5 x VDD x tuning slope – stability – 10 ppm  
5. Minimum APR values noted above include worst case values for all parameters.  
6. Combination not available.  
Example Part Number: 554AF000124DGR is a 5 x 7 mm Quad VCXO in an 8 pad package. Since the six digit code (000124) is > 000100, f0 is  
622.08 MHz (lowest frequency), f1 is 644.53125, f2 is 657.42188, and f3 is 669.32658 MHz (highest frequency), with a 3.3 V supply, LVPECL  
output, and Output Enable active high polarity. Temperature stability is specified as ±50 ppm and the tuning slope is 135 ppm/V. The part is specified  
for a –40 to +85 C° ambient temperature range operation and is shipped in tape and reel format.  
Figure 1. Part Number Convention  
Rev. 1.0  
9
Si554  
4. Package Outline and Suggested Pad Layout  
Figure 2 illustrates the package details for the Si554. Table 11 lists the values for the dimensions shown in the  
illustration.  
Figure 2. Si554 Outline Diagram  
Table 11. Package Diagram Dimensions (mm)  
Dimension  
Min  
1.50  
1.30  
0.90  
0.50  
0.30  
Nom  
1.65  
1.40  
1.00  
0.60  
Max  
1.80  
1.50  
1.10  
0.70  
0.60  
A
b
b1  
c
c1  
D
D1  
e
E
E1  
H
L
L1  
p
5.00 BSC  
4.40  
2.54 BSC  
7.00 BSC  
6.20  
4.30  
4.50  
6.10  
0.55  
1.17  
1.07  
1.80  
6.30  
0.75  
1.37  
1.27  
2.60  
0.65  
1.27  
1.17  
R
0.70 REF  
aaa  
bbb  
ccc  
ddd  
eee  
0.15  
0.15  
0.10  
0.10  
0.05  
Note:  
1. All dimensions shown are in millimeters (mm) unless otherwise noted.  
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994.  
10  
Rev. 1.0  
Si554  
5. 8-Pin PCB Land Pattern  
Figure 3 illustrates the 8-pin PCB land pattern for the Si554. Table 12 lists the values for the dimensions shown in  
the illustration.  
Figure 3. Si554 PCB Land Pattern  
Table 12. PCB Land Pattern Dimensions (mm)  
Dimension  
Min  
Max  
D2  
D3  
5.08 REF  
5.705 REF  
2.54 BSC  
4.20 REF  
e
E2  
GD  
GE  
VD  
VE  
0.84  
2.00  
8.20 REF  
7.30 REF  
1.70 TYP  
1.545 TYP  
2.15 REF  
1.3 REF  
X1  
X2  
Y1  
Y2  
ZD  
6.78  
6.30  
ZE  
Note:  
1. Dimensioning and tolerancing per the ANSI Y14.5M-1994  
specification.  
2. Land pattern design follows IPC-7351 guidelines.  
3. All dimensions shown are at maximum material condition  
(MMC).  
4. Controlling dimension is in millimeters (mm).  
Rev. 1.0  
11  
Si554  
6. Top Marking  
6.1. Si554 Top Marking  
6.2. Top Marking Explanation  
Line  
Position  
Description  
1
1–10  
“SiLabs”+ Part Family Number, 554 (First 3 characters in part number)  
2
1–10  
Si554: Option1+Option2+Freq(7)+Temp  
Si554 w/ 8-digit resolution: Option1+Option2+ConfigNum(6)+Temp  
3
Trace Code  
Position 1  
Pin 1 orientation mark (dot)  
Product Revision (D)  
Position 2  
Tiny Trace Code (4 alphanumeric characters per assembly release instructions)  
Year (least significant year digit), to be assigned by assembly site (ex: 2007 = 7)  
Calendar Work Week number (1–53), to be assigned by assembly site  
“+” to indicate Pb-Free and RoHS-compliant  
Position 3–6  
Position 7  
Position 8–9  
Position 10  
12  
Rev. 1.0  
Si554  
DOCUMENT CHANGE LIST  
Revision 0.6 to Revision 1.0  
Updated Table 4 on page 3.  
Updated 2.5 V/3.3 V and 1.8 V CML output level  
specifications.  
Updated Table 5 on page 4.  
Removed the words “Differential Modes:  
LVPECL/LVDS/CML” in the footnote referring to AN256.  
Added footnotes clarifying max offset frequency test  
conditions.  
Added CMOS phase jitter specs.  
Updated Table 9 on page 7.  
Separated 1.8 V, 2.5 V/3.3 V supply voltage  
specifications.  
Updated ESD HBM sensitivity rating.  
Updated and clarified Table 8 on page 7  
Added “Moisture Sensitivity Level” and “Contact Pads”  
rows.  
Updated 6. "Top Marking" on page 12 to reflect  
specific marking information (previously, figure was  
generic).  
Updated 4. "Package Outline and Suggested Pad  
Layout" on page 10.  
Added cyrstal impedance pin in Figure 2 on page 10  
and Table 11 on page 10.  
Reordered spec tables and back matter to conform  
to data sheet quality conventions.  
Rev. 1.0  
13  
Si554  
CONTACT INFORMATION  
Silicon Laboratories Inc.  
400 West Cesar Chavez  
Austin, TX 78701  
Tel: 1+(512) 416-8500  
Fax: 1+(512) 416-9669  
Toll Free: 1+(877) 444-3032  
Please visit the Silicon Labs Technical Support web page:  
https://www.silabs.com/support/pages/contacttechnicalsupport.aspx  
and register to submit a technical support request.  
The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.  
Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from  
the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features  
or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, rep-  
resentation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability  
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation conse-  
quential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to  
support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where per-  
sonal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized ap-  
plication, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages.  
Silicon Laboratories, Silicon Labs, and DSPLL are trademarks of Silicon Laboratories Inc.  
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.  
14  
Rev. 1.0  

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