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

Programmable Oscillators

Programmable Oscillators are available at Mouser Electronics from industry leading manufacturers. Mouser is an authorized distributor for many programmable oscillator manufacturers including Analog Devices, Microchip, Skyworks & many more. Please view our large selection of programmable oscillators below.

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

Results: 9 071

Applied Filters:

Manufacturer

Product

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

Qualification

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 #

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514FCB000118BAG
Skyworks Solutions, Inc.
200: 106,60 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514FCB000118BAG

Mouser Part No
634-514FCB000118BAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

106,60 kr

Min.: 200
Mult.: 200

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 250 MHz

30 PPM

15 pF

2.25 V

2.75 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514FCB000118BAGR
Skyworks Solutions, Inc.
1 000: 106,60 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514FCB000118BAGR

Mouser Part No
634-514FCB000118BAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

106,60 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 250 MHz

30 PPM

15 pF

2.25 V

2.75 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GAC000163BAG
Skyworks Solutions, Inc.
200: 70,23 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GAC000163BAG

Mouser Part No
634-514GAC000163BAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

70,23 kr

69,24 kr

68,58 kr

Min.: 200
Mult.: 200

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

100 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GAC000163BAGR
Skyworks Solutions, Inc.
1 000: 67,48 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GAC000163BAGR

Mouser Part No
634-514GAC000163BAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

67,48 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

100 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBA000159BAG
Skyworks Solutions, Inc.
200: 88,80 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBA000159BAG

Mouser Part No
634-514GBA000159BAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

88,80 kr

88,14 kr

Min.: 200
Mult.: 200

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBA000159BAGR
Skyworks Solutions, Inc.
1 000: 87,92 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBA000159BAGR

Mouser Part No
634-514GBA000159BAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

87,92 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBA000835AAG
Skyworks Solutions, Inc.
200: 128,58 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBA000835AAG

Mouser Part No
634-514GBA000835AAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

128,58 kr

Min.: 200
Mult.: 200

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBA000835AAGR
Skyworks Solutions, Inc.
1 000: 128,58 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBA000835AAGR

Mouser Part No
634-514GBA000835AAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

128,58 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBA001069AAG
Skyworks Solutions, Inc.
200: 128,58 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBA001069AAG

Mouser Part No
634-514GBA001069AAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

128,58 kr

Min.: 200
Mult.: 200

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBA001069AAGR
Skyworks Solutions, Inc.
1 000: 128,58 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBA001069AAGR

Mouser Part No
634-514GBA001069AAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

128,58 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBB000110BAG
Skyworks Solutions, Inc.
200: 80,34 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBB000110BAG

Mouser Part No
634-514GBB000110BAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

80,34 kr

79,46 kr

Quote

Min.: 200
Mult.: 200

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBB000110BAGR
Skyworks Solutions, Inc.
1 000: 78,58 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBB000110BAGR

Mouser Part No
634-514GBB000110BAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

78,58 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Reel

Programmable Oscillators Si514 Crystal Oscillator (XO)

514GBB000118AAG
Skyworks Solutions, Inc.
200: 110,78 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBB000118AAG

Mouser Part No
634-514GBB000118AAG

Skyworks Solutions, Inc.

Programmable Oscillators Si514 Crystal Oscillator (XO)

Datasheet

Non-Stocked Lead-Time 8 Weeks

110,78 kr

Min.: 200
Mult.: 200

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBB000118AAGR
Skyworks Solutions, Inc.
1 000: 110,78 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBB000118AAGR

Mouser Part No
634-514GBB000118AAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

110,78 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBC001688AAG
Skyworks Solutions, Inc.
200: 98,03 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBC001688AAG

Mouser Part No
634-514GBC001688AAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

98,03 kr

Min.: 200
Mult.: 200

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBC001688AAGR
Skyworks Solutions, Inc.
1 000: 98,03 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBC001688AAGR

Mouser Part No
634-514GBC001688AAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

98,03 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBC001688BAG
Skyworks Solutions, Inc.
200: 73,19 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBC001688BAG

Mouser Part No
634-514GBC001688BAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

73,19 kr

72,42 kr

71,76 kr

Quote

Min.: 200
Mult.: 200

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GBC001688BAGR
Skyworks Solutions, Inc.
1 000: 70,78 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GBC001688BAGR

Mouser Part No
634-514GBC001688BAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

70,78 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

50 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GCA000112AAG
Skyworks Solutions, Inc.
200: 133,42 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GCA000112AAG

Mouser Part No
634-514GCA000112AAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

133,42 kr

Min.: 200
Mult.: 200

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

30 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GCA000112AAGR
Skyworks Solutions, Inc.
1 000: 133,42 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GCA000112AAGR

Mouser Part No
634-514GCA000112AAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

133,42 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

30 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GCA000112BAG
Skyworks Solutions, Inc.
200: 94,18 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GCA000112BAG

Mouser Part No
634-514GCA000112BAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

94,18 kr

93,85 kr

Min.: 200
Mult.: 200

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

30 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GCA000112BAGR
Skyworks Solutions, Inc.
1 000: 93,74 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GCA000112BAGR

Mouser Part No
634-514GCA000112BAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

93,74 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

5 mm x 3.2 mm

100 kHz to 212.5 MHz

30 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

5 mm

3.2 mm

1.33 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GCA000115AAG
Skyworks Solutions, Inc.
200: 133,42 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GCA000115AAG

Mouser Part No
634-514GCA000115AAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

133,42 kr

Min.: 200
Mult.: 200

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

30 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Cut Tape

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GCA000115AAGR
Skyworks Solutions, Inc.
1 000: 133,42 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GCA000115AAGR

Mouser Part No
634-514GCA000115AAGR

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

Reel

133,42 kr

Min.: 1 000
Mult.: 1 000

: 1 000

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

30 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Reel

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

514GCB000112AAG
Skyworks Solutions, Inc.
200: 115,07 kr
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
514GCB000112AAG

Mouser Part No
634-514GCB000112AAG

Skyworks Solutions, Inc.

Programmable Oscillators Any Freq (I2C) GP XO, OE N/A, 0.1-250MHz

Datasheet

Non-Stocked Lead-Time 8 Weeks

115,07 kr

Min.: 200
Mult.: 200

Standard Oscillators

7 mm x 5 mm

100 kHz to 212.5 MHz

30 PPM

15 pF

2.25 V

2.75 V

CMOS

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.8 mm

Si514

Cut Tape

Programmable Oscillators

Customer Service Office

Company

Resources

Support

0806 (2016 metric)
13.2 mm x 13.2 mm
2.5 mm x 3.2 mm
20.7 mm x 13.2 mm
3.2 mm x 2.5 mm
3.2 mm x 5 mm
5 mm x 3.2 mm
5 mm x 7 mm
7 mm x 5 mm
CDFN-6
CLCC-8
CQFN-10
DFN-6-G1-6
DFN-8
DIE
QFN-4
SMD-6
SOT-23-5
VDFN-4
VDFN-6

100 kHz to 120 MHz
100 kHz to 125 MHz
100 kHz to 212.5 MHz
100 kHz to 250 MHz
100 kHz, 250 MHz
200 kHz to 1.5 GHz
200 kHz to 250 MHz
200 kHz to 3 GHz
200 kHz to 325 MHz
200 kHz to 800 MHz
670 kHz to 170 MHz
800 kHz to 110 MHz
1 MHz to 110 MHz
1 MHz to 150 MHz
1 MHz to 220 MHz
1 MHz to 80 MHz
2.3 MHz to 170 MHz
2.3 MHz to 450 MHz
4 MHz
10 MHz

0.6 mm
0.7 mm
0.74 mm
0.75 mm
0.84 mm
0.85 mm
0.9 mm
0.96 mm
1 mm
1.05 mm
1.1 mm
1.17 mm
1.18 mm
1.27 mm
1.3 mm
1.33 mm
1.5 mm
1.65 mm
1.7 mm
1.8 mm

7359
AD2S99
AP3S
ASEMCC
ASEMCHC
ASEMDC
ASEMDLC
ASEMDLP
ASEMDLV
ASG2
ASGTX
ASSFLP
AX5V
AX7V
C1250
C1300
DSC1000
DSC1100
DSC1101
DSC1121