.hide-partial { max-height: none; } .show-more { display: none; }

Skyworks Standard Clock Oscillators

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 16.252

Applied Filters:

Manufacturer = Skyworks

Product Type

Package/Case

Frequency

Frequency Stability

Load Capacitance

Supply Voltage - Min

Supply Voltage - Max

Output Format

Termination Style

Minimum Operating Temperature

Maximum Operating Temperature

Length

Width

Height

Series

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Standard Clock Oscillators Differential/single-ended; Single frequency XO; 0.2-1500 MHz

540CAA100M000CCG
Skyworks Solutions, Inc.
1: 59,75 kr.
49In Stock

Mfr. Part No.
540CAA100M000CCG

Mouser Part No
873-540CAA100M000CCG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; Single frequency XO; 0.2-1500 MHz

Datasheet

49In Stock

59,75 kr.

51,55 kr.

48,94 kr.

45,13 kr.

View

Min.: 1
Mult.: 1

Si540

Cut Tape

Standard Clock Oscillators Differential/single-ended; Single frequency XO; 0.2-1500 MHz

545BAA200M000BCG
Skyworks Solutions, Inc.
1: 92,28 kr.
48In Stock

Mfr. Part No.
545BAA200M000BCG

Mouser Part No
873-545BAA200M000BCG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; Single frequency XO; 0.2-1500 MHz

Datasheet

48In Stock

92,28 kr.

79,75 kr.

75,72 kr.

71,99 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

Si545

Cut Tape

Standard Clock Oscillators Differential/single-ended; Single frequency XO; 0.2-1500 MHz

545CCC50M0000BCG
Skyworks Solutions, Inc.
1: 87,36 kr.
3In Stock

Mfr. Part No.
545CCC50M0000BCG

Mouser Part No
873-545CCC50M0000BCG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; Single frequency XO; 0.2-1500 MHz

Datasheet

3In Stock

87,36 kr.

75,42 kr.

71,69 kr.

64,83 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

Si545

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

511BBA148M500BAGR
Skyworks Solutions, Inc.
1: 40,21 kr.
368In Stock

Mfr. Part No.
511BBA148M500BAGR

Mouser Part No
634-11BBA148M500BAGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

Datasheet

368In Stock

Cut Tape

40,21 kr.

34,69 kr.

32,97 kr.

31,41 kr.

Reel

25,44 kr.

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1.000

Standard Oscillators

5 mm x 3.2 mm

148.5 MHz

25 PPM

15 pF

2.97 V

3.63 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.28 mm (0.05 in)

Si511

Reel, Cut Tape, MouseReel

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 0.1-250 MHz

510PCA125M000BAG
Skyworks Solutions, Inc.
1: 44,01 kr.
198In Stock

Mfr. Part No.
510PCA125M000BAG

Mouser Part No
634-510PCA125M000BAG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 0.1-250 MHz

Datasheet

198In Stock

44,01 kr.

38,27 kr.

36,18 kr.

34,69 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

5 mm x 3.2 mm

125 MHz

20 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.28 mm (0.05 in)

Si510

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

511ABA100M000BAG
Skyworks Solutions, Inc.
1: 34,91 kr.
197In Stock

Mfr. Part No.
511ABA100M000BAG

Mouser Part No
634-511ABA100M000BAG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

Datasheet

197In Stock

34,91 kr.

30,44 kr.

28,72 kr.

27,53 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

5 mm x 3.2 mm

100 MHz

25 PPM

15 pF

2.97 V

3.63 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.28 mm (0.05 in)

Si511

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

511BBA50M0000BAG
Skyworks Solutions, Inc.
1: 43,57 kr.
185In Stock

Mfr. Part No.
511BBA50M0000BAG

Mouser Part No
634-511BBA50M0000BAG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

Datasheet

185In Stock

43,57 kr.

37,60 kr.

35,73 kr.

34,02 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

5 mm x 3.2 mm

50 MHz

25 PPM

15 pF

2.97 V

3.63 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.28 mm (0.05 in)

Si511

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

511BCA000244BAG
Skyworks Solutions, Inc.
1: 51,10 kr.
186In Stock

Mfr. Part No.
511BCA000244BAG

Mouser Part No
634-511BCA000244BAG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

Datasheet

186In Stock

51,10 kr.

44,16 kr.

41,93 kr.

39,91 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

5 mm x 3.2 mm

244 kHz

20 PPM

15 pF

2.97 V

3.63 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.28 mm (0.05 in)

Si511

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

530DC25M0000DGR
Skyworks Solutions, Inc.
1: 115,33 kr.
234In Stock

Mfr. Part No.
530DC25M0000DGR

Mouser Part No
634-530DC25M0000DGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

Datasheet

234In Stock

Cut Tape

115,33 kr.

99,67 kr.

94,67 kr.

90,04 kr.

86,24 kr.

Reel

79,60 kr.

Min.: 1
Mult.: 1

Reel: 250

Standard Oscillators

7 mm x 5 mm

25 MHz

7 PPM

15 pF

2.97 V

3.63 V

CML

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si530

Reel, Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

530GB25M0000DG
Skyworks Solutions, Inc.
1: 85,34 kr.
106In Stock

Mfr. Part No.
530GB25M0000DG

Mouser Part No
634-530GB25M0000DG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

Datasheet

106In Stock

85,34 kr.

74,08 kr.

70,12 kr.

67,21 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

7 mm x 5 mm

25 MHz

20 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si530

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 10-1417 MHz

531AB25M0000DGR
Skyworks Solutions, Inc.
1: 90,94 kr.
182In Stock

Mfr. Part No.
531AB25M0000DGR

Mouser Part No
634-531AB25M0000DGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 10-1417 MHz

Datasheet

182In Stock

Cut Tape

90,94 kr.

78,55 kr.

74,60 kr.

71,09 kr.

67,89 kr.

Reel

61,32 kr.

Min.: 1
Mult.: 1

Reel: 250

Standard Oscillators

7 mm x 5 mm

25 MHz

20 PPM

15 pF

2.97 V

3.63 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si531

Reel, Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

511ABA128M906AAGR
Skyworks Solutions, Inc.
1: 49,68 kr.
850In Stock

Mfr. Part No.
511ABA128M906AAGR

Mouser Part No
634-511ABA128M906AGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

Datasheet

850In Stock

Cut Tape

49,68 kr.

42,82 kr.

40,73 kr.

38,79 kr.

View

Reel

31,63 kr.

Min.: 1
Mult.: 1

Reel: 1.000

Standard Oscillators

7 mm x 5 mm

128.906 MHz

25 PPM

15 pF

2.97 V

3.63 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.8 mm (0.071 in)

Si511

Reel, Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

511JCA200M000AAG
Skyworks Solutions, Inc.
1: 57,82 kr.
320In Stock

Mfr. Part No.
511JCA200M000AAG

Mouser Part No
634-511JCA200M000AAG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 0.1-250 MHz

Datasheet

320In Stock

57,82 kr.

49,91 kr.

47,45 kr.

45,13 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

7 mm x 5 mm

200 MHz

20 PPM

15 pF

1.71 V

1.89 V

LVDS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.8 mm (0.071 in)

Si511

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

530JC66M0000DG
Skyworks Solutions, Inc.
1: 115,33 kr.
75In Stock

Mfr. Part No.
530JC66M0000DG

Mouser Part No
634-530JC66M0000DG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

Datasheet

75In Stock

115,33 kr.

99,67 kr.

94,67 kr.

86,09 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

7 mm x 5 mm

66 MHz

7 PPM

15 pF

1.71 V

1.89 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si530

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 10-1417 MHz

531AC125M000DGR
Skyworks Solutions, Inc.
1: 90,64 kr.
299In Stock

Mfr. Part No.
531AC125M000DGR

Mouser Part No
634-531AC125M000DGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 10-1417 MHz

Datasheet

299In Stock

Cut Tape

90,64 kr.

78,78 kr.

77,21 kr.

74,23 kr.

71,02 kr.

Reel

65,65 kr.

MouseReel Available

Min.: 1
Mult.: 1

Reel: 250

Standard Oscillators

7 mm x 5 mm

125 MHz

20 PPM

15 pF

2.97 V

3.63 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si531

Reel, Cut Tape, MouseReel

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 10-1417 MHz

531EC125M000DGR
Skyworks Solutions, Inc.
1: 95,12 kr.
880In Stock

Mfr. Part No.
531EC125M000DGR

Mouser Part No
634-531EC125M000DGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 10-1417 MHz

Datasheet

880In Stock

Cut Tape

95,12 kr.

82,13 kr.

77,96 kr.

74,23 kr.

Reel

66,02 kr.

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 250

Standard Oscillators

7 mm x 5 mm

125 MHz

20 PPM

15 pF

2.25 V

2.75 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si531

Reel, Cut Tape, MouseReel

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 0.1-250 MHz

510BBA25M0000AAGR
Skyworks Solutions, Inc.
1: 47,15 kr.
948In Stock

Mfr. Part No.
510BBA25M0000AAGR

Mouser Part No
634-510BBA250000AAGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 0.1-250 MHz

Datasheet

948In Stock

Cut Tape

47,15 kr.

40,73 kr.

38,72 kr.

36,93 kr.

View

Reel

30,06 kr.

Min.: 1
Mult.: 1

Reel: 1.000

Standard Oscillators

7 mm x 5 mm

25 MHz

50 PPM

15 pF

2.97 V

3.63 V

LVDS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si510

Reel, Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 0.1-250 MHz

510BBA250M000BAG
Skyworks Solutions, Inc.
1: 52,97 kr.
156In Stock

Mfr. Part No.
510BBA250M000BAG

Mouser Part No
634-510BBA250M000BAG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 0.1-250 MHz

Datasheet

156In Stock

52,97 kr.

45,80 kr.

43,49 kr.

41,48 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

5 mm x 3.2 mm

250 MHz

25 PPM

15 pF

2.97 V

3.63 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.28 mm (0.05 in)

Si510

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

530AA156M250DG
Skyworks Solutions, Inc.
1: 94,97 kr.
80In Stock

Mfr. Part No.
530AA156M250DG

Mouser Part No
634-530AA156M250DG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

Datasheet

80In Stock

94,97 kr.

82,58 kr.

78,11 kr.

74,82 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

7 mm x 5 mm

156.25 MHz

50 PPM

15 pF

2.97 V

3.63 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si530

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

530BB50M0000DGR
Skyworks Solutions, Inc.
1: 90,94 kr.
250In Stock

Mfr. Part No.
530BB50M0000DGR

Mouser Part No
634-530BB50M0000DGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

Datasheet

250In Stock

Cut Tape

90,94 kr.

78,55 kr.

74,60 kr.

71,09 kr.

Reel

61,99 kr.

View

Min.: 1
Mult.: 1

Reel: 250

Standard Oscillators

7 mm x 5 mm

50 MHz

20 PPM

15 pF

2.97 V

3.63 V

LVDS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si530

Reel, Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

530FC67M5840DG
Skyworks Solutions, Inc.
1: 115,33 kr.
99In Stock

Mfr. Part No.
530FC67M5840DG

Mouser Part No
634-530FC67M5840DG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

Datasheet

99In Stock

115,33 kr.

99,67 kr.

94,67 kr.

86,09 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

7 mm x 5 mm

67.584 MHz

7 PPM

15 pF

2.25 V

2.75 V

LVDS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si530

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

530GB25M0000DGR
Skyworks Solutions, Inc.
1: 90,94 kr.
244In Stock

Mfr. Part No.
530GB25M0000DGR

Mouser Part No
634-530GB25M0000DGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-1417 MHz

Datasheet

244In Stock

Cut Tape

90,94 kr.

78,55 kr.

74,60 kr.

71,09 kr.

67,89 kr.

Reel

61,32 kr.

Min.: 1
Mult.: 1

Reel: 250

Standard Oscillators

7 mm x 5 mm

25 MHz

20 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si530

Reel, Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 10-1417 MHz

531EB250M000DG
Skyworks Solutions, Inc.
1: 209,85 kr.
53In Stock

Mfr. Part No.
531EB250M000DG

Mouser Part No
634-531EB250M000DG

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 1; 10-1417 MHz

Datasheet

53In Stock

209,85 kr.

182,47 kr.

174,56 kr.

169,04 kr.

168,52 kr.

Min.: 1
Mult.: 1

Standard Oscillators

7 mm x 5 mm

250 MHz

20 PPM

15 pF

2.25 V

2.75 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si531

Cut Tape

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-810 MHz

590VC125M000DGR
Skyworks Solutions, Inc.
1: 59,38 kr.
250In Stock

Mfr. Part No.
590VC125M000DGR

Mouser Part No
634-590VC125M000DGR

Skyworks Solutions, Inc.

Standard Clock Oscillators Differential/single-ended; single frequency XO; OE pin 2 (pin 1 for CMOS); 10-810 MHz

Datasheet

250In Stock

Cut Tape

59,38 kr.

51,18 kr.

48,64 kr.

46,40 kr.

Reel

41,03 kr.

View

Min.: 1
Mult.: 1

Reel: 250

Standard Oscillators

7 mm x 5 mm

125 MHz

30 PPM

15 pF

1.71 V

1.89 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.65 mm (0.065 in)

Si590

Reel, Cut Tape

Standard Clock Oscillators Any-frequency jitter attenuating clock

SI5317D-C-GM
Skyworks Solutions, Inc.
1: 99,52 kr.
935In Stock

Mfr. Part No.
SI5317D-C-GM

Mouser Part No
634-SI5317D-C-GM

Skyworks Solutions, Inc.

Standard Clock Oscillators Any-frequency jitter attenuating clock

Datasheet

935In Stock

99,52 kr.

85,94 kr.

81,54 kr.

77,66 kr.

View

Min.: 1
Mult.: 1

Standard Oscillators

QFN-36

100 MHz

20 PPM

3 pF

1.71 V

3.63 V

CML

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.85 mm (0.073 in)

SI5317D

Tray

Skyworks Standard Clock Oscillators

Customer Service Office

Company

Resources

Support

50.566667 kHz
100 kHz
100 kHz, 1 MHz
100 kHz, 200 MHz
100 kHz, 200 kHz
102.4 kHz
106 kHz
107 kHz
108 kHz
110 kHz
115 kHz
115.2 kHz
116 kHz
118 kHz
119 kHz
120 kHz
122 kHz
123 kHz
125.25 kHz
125.55 kHz

Si510
Si511
Si512
Si513
Si530
Si531
SI5317A
SI5317B
SI5317C
SI5317D
Si532
Si533
Si534
Si535
Si536
Si540
Si541
Si542
Si544
Si545