INDUSTRIAL Clock Generators 279

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Part RoHS Manufacturer Peripheral IC Type Temperature Grade Terminal Form No. of Terminals Package Code Package Shape Package Body Material Surface Mount Maximum Supply Voltage Screening Level Address Bus Width Maximum Output Clock Frequency DAC Channels Power Supplies (V) Package Style (Meter) Package Equivalence Code Minimum Supply Voltage Maximum Operating Temperature Minimum Operating Temperature Terminal Finish ADC Channels Terminal Position DMA Channels Maximum Seated Height Width Additional Features External Data Bus Width Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Length Total Dose (V) Technology Maximum Supply Current Nominal Supply Voltage PWM Channels Sub-Category ROM Programmability Terminal Pitch JESD-30 Code Moisture Sensitivity Level (MSL) Qualification Speed Nominal Primary Clock/Crystal Frequency JESD-609 Code No. of I/O Lines

PI6CG18200ZDIE

Diodes Incorporated

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

UNSPECIFIED

YES

1.9 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC24,.16SQ,20

1.7 V

85 Cel

-40 Cel

QUAD

1 mm

4 mm

4 mm

CMOS

18 mA

1.8 V

.5 mm

S-XQCC-N24

27 MHz

SI5338A-B08985-GMR

Silicon Labs

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

UNSPECIFIED

YES

1.98 V

710 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

1.71 V

85 Cel

-40 Cel

QUAD

.9 mm

4 mm

IT ALSO OPERATES AT 2.5V AND 3.3V NOMINAL

NOT SPECIFIED

260

4 mm

CMOS

1.8 V

.5 mm

S-XQCC-N24

30 MHz

SI5338C-B04171-GMR

Silicon Labs

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

UNSPECIFIED

YES

1.98 V

200 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

1.71 V

85 Cel

-40 Cel

QUAD

.9 mm

4 mm

IT ALSO OPERATES AT 2.5V AND 3.3V NOMINAL

NOT SPECIFIED

260

4 mm

CMOS

1.8 V

.5 mm

S-XQCC-N24

30 MHz

SI5338C-B04171-GM

Silicon Labs

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

UNSPECIFIED

YES

1.98 V

200 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

1.71 V

85 Cel

-40 Cel

QUAD

.9 mm

4 mm

IT ALSO OPERATES AT 2.5V AND 3.3V NOMINAL

NOT SPECIFIED

260

4 mm

CMOS

1.8 V

.5 mm

S-XQCC-N24

30 MHz

SI5341A-C-GMR

Silicon Labs

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

64

HVQCCN

SQUARE

UNSPECIFIED

YES

1.89 V

1028 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

1.71 V

85 Cel

-40 Cel

QUAD

.9 mm

9 mm

40

260

9 mm

CMOS

1.8 V

.5 mm

S-XQCC-N64

2

750 MHz

LMK04228NKDR

Texas Instruments

CLOCK GENERATOR, OTHER

INDUSTRIAL

NO LEAD

64

HVQCCN

SQUARE

UNSPECIFIED

YES

3.45 V

1250 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

3.15 V

85 Cel

-40 Cel

Matte Tin (Sn)

QUAD

.8 mm

9 mm

NOT SPECIFIED

NOT SPECIFIED

9 mm

CMOS

3.3 V

.5 mm

S-XQCC-N64

3

400 MHz

e3

LMK04228NKDT

Texas Instruments

CLOCK GENERATOR, OTHER

INDUSTRIAL

NO LEAD

64

HVQCCN

SQUARE

UNSPECIFIED

YES

3.45 V

1250 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

3.15 V

85 Cel

-40 Cel

Matte Tin (Sn)

QUAD

.8 mm

9 mm

NOT SPECIFIED

NOT SPECIFIED

9 mm

CMOS

3.3 V

.5 mm

S-XQCC-N64

3

400 MHz

e3

SI5345C-B03376-GMR

Silicon Labs

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

64

HVQCCN

SQUARE

UNSPECIFIED

YES

1.89 V

712.5 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

1.71 V

85 Cel

-40 Cel

QUAD

.9 mm

9 mm

30

260

9 mm

CMOS

1.8 V

.5 mm

S-XQCC-N64

750 MHz

SI5341B-B04020-GM

Silicon Labs

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

64

HVQCCN

SQUARE

UNSPECIFIED

YES

1.89 V

350 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

1.71 V

85 Cel

-40 Cel

QUAD

.9 mm

9 mm

40

260

9 mm

CMOS

1.8 V

.5 mm

S-XQCC-N64

2

750 MHz

ZL30151LDG1

Microchip Technology

JITTER ATTENUATOR

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

1.89 V

650 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

1.71 V

85 Cel

-40 Cel

QUAD

1 mm

5 mm

IT ALSO OPERATES AT 3.3V NOM SUPPLY

5 mm

CMOS

297 mA

1.8 V

.5 mm

S-XQCC-N32

650 MHz

DSC557-0334FI1

Microchip Technology

CLOCK GENERATOR, PCIe

INDUSTRIAL

NO LEAD

14

HVQCCN

RECTANGULAR

UNSPECIFIED

YES

3.6 V

460 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC14,.1X.12,20

2.25 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

.9 mm

2.5 mm

MEMS CLOCK GENERATORS AS EXT CLOCK; PCIe Generation 1, 2, 3

30

260

3.2 mm

CMOS

23 mA

3.3 V

.5 mm

R-XQCC-N14

1

e4

DSC557-0343FI1

Microchip Technology

CLOCK GENERATOR, PCIe

INDUSTRIAL

NO LEAD

14

HVQCCN

RECTANGULAR

UNSPECIFIED

YES

3.6 V

460 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC14,.1X.12,20

2.25 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

.9 mm

2.5 mm

MEMS CLOCK GENERATORS AS EXT CLOCK; PCIe Generation 1, 2, 3

30

260

3.2 mm

CMOS

23 mA

3.3 V

.5 mm

R-XQCC-N14

1

e4

DSC557-0344FI0

Microchip Technology

CLOCK GENERATOR, PCIe

INDUSTRIAL

NO LEAD

14

HVQCCN

RECTANGULAR

UNSPECIFIED

YES

3.6 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC14,.1X.12,20

2.25 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

.9 mm

2.5 mm

MEMS CLOCK GENERATORS AS EXT CLOCK; PCIe Generation 1, 2, 3,4

30

260

3.2 mm

CMOS

3.3 V

.5 mm

R-XQCC-N14

1

e4

DSC557-0344FI1

Microchip Technology

CLOCK GENERATOR, PCIe

INDUSTRIAL

NO LEAD

14

HVQCCN

RECTANGULAR

UNSPECIFIED

YES

3.6 V

460 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC14,.1X.12,20

2.25 V

85 Cel

-40 Cel

Nickel/Palladium/Gold (Ni/Pd/Au)

QUAD

.9 mm

2.5 mm

MEMS CLOCK GENERATORS AS EXT CLOCK; PCIe Generation 1, 2, 3

30

260

3.2 mm

CMOS

23 mA

3.3 V

.5 mm

R-XQCC-N14

1

e4

DSC557-0344FL1

Microchip Technology

CLOCK GENERATOR, PCIe

INDUSTRIAL

NO LEAD

14

HVQCCN

RECTANGULAR

UNSPECIFIED

YES

3.6 V

460 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC14,.1X.12,20

2.25 V

105 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

.9 mm

2.5 mm

MEMS CLOCK GENERATORS AS EXT CLOCK; PCIe Generation 1, 2, 3

30

260

3.2 mm

CMOS

23 mA

3.3 V

.5 mm

R-XQCC-N14

1

e4

DSC557-054444KI1

Microchip Technology

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

20

HVQCCN

RECTANGULAR

UNSPECIFIED

YES

3.6 V

460 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC20,.12X.2,20

2.25 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

.9 mm

3.2 mm

MEMS CLOCK GENERATORS AS EXT CLOCK; PCIe Generation 1, 2, 3

40

260

5 mm

CMOS

46 mA

3.3 V

.5 mm

R-XQCC-N20

1

e4

CDCE6214RGER

Texas Instruments

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

3.465 V

350 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC24,.16SQ,20

1.71 V

105 Cel

-40 Cel

MATTE TIN

QUAD

.9 mm

4 mm

30

260

4 mm

CMOS

1.8 V

.5 mm

S-PQCC-N24

2

50 MHz

e3

LMK5B12204RGZR

Texas Instruments

CLOCK GENERATOR, OTHER

INDUSTRIAL

NO LEAD

48

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

3.465 V

800 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC48,.28SQ,20

3.135 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

1 mm

7 mm

30

260

7 mm

CMOS

3.3 V

.5 mm

S-PQCC-N48

3

100 MHz

e4

LMK61E08-SIAR

Texas Instruments

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

6

DMA

RECTANGULAR

UNSPECIFIED

YES

3.465 V

1000 MHz

MICROELECTRONIC ASSEMBLY

MODULE,6LEAD,164

3.135 V

85 Cel

-40 Cel

NICKEL GOLD

DUAL

1.15 mm

5 mm

30

260

7 mm

CMOS

208 mA

3.3 V

2.54 mm

R-XDMA-N6

3

50 MHz

e4

LMK61E08-SIAT

Texas Instruments

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

6

DMA

RECTANGULAR

UNSPECIFIED

YES

3.465 V

1000 MHz

MICROELECTRONIC ASSEMBLY

MODULE,6LEAD,164

3.135 V

85 Cel

-40 Cel

NICKEL GOLD

DUAL

1.15 mm

5 mm

30

260

7 mm

CMOS

208 mA

3.3 V

2.54 mm

R-XDMA-N6

3

50 MHz

e4

LMK5C33216RGCT

Texas Instruments

CLOCK GENERATOR, OTHER

INDUSTRIAL

NO LEAD

64

VQCCN

SQUARE

PLASTIC/EPOXY

YES

3.465 V

3000 MHz

CHIP CARRIER, HEAT SINK, THIN PROFILE

3.135 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

9 mm

30

260

9 mm

CMOS

1050 mA

3.3 V

.5 mm

S-PQCC-N64

3

100 MHz

e4

LMK5C33216RGCR

Texas Instruments

CLOCK GENERATOR, OTHER

INDUSTRIAL

NO LEAD

64

VQCCN

SQUARE

PLASTIC/EPOXY

YES

3.465 V

3000 MHz

CHIP CARRIER, HEAT SINK, THIN PROFILE

3.135 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

QUAD

9 mm

30

260

9 mm

CMOS

1050 mA

3.3 V

.5 mm

S-PQCC-N64

3

100 MHz

e4

MAX3674ECM2T

Microchip Technology

CLOCK GENERATOR, ETHERNET

INDUSTRIAL

GULL WING

48

LQFP

SQUARE

PLASTIC/EPOXY

YES

3.465 V

1360 MHz

FLATPACK, LOW PROFILE

QFP48,.35SQ,32

3.135 V

85 Cel

-40 Cel

QUAD

1.6 mm

7 mm

7 mm

CMOS

136 mA

3.3 V

.8 mm

S-PQFP-G44

20 MHz

AD9546BCPZ

Analog Devices

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

48

HVQCCN

SQUARE

UNSPECIFIED

YES

1.89 V

2415 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC48,.27SQ,20

1.71 V

85 Cel

-40 Cel

Matte Tin (Sn) - annealed

QUAD

.8 mm

7 mm

260

7 mm

CMOS

440 mA

1.8 V

.5 mm

S-XQCC-N48

3

300 MHz

e3

AD9546BCPZ-REEL7

Analog Devices

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

48

HVQCCN

SQUARE

UNSPECIFIED

YES

1.89 V

2415 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC48,.27SQ,20

1.71 V

85 Cel

-40 Cel

Matte Tin (Sn) - annealed

QUAD

.8 mm

7 mm

260

7 mm

CMOS

440 mA

1.8 V

.5 mm

S-XQCC-N48

3

300 MHz

e3

8V19N882NVGI

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

76

HVQCCN

SQUARE

UNSPECIFIED

YES

1.9 V

6000 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC76,35SQ,16

1.7 V

95 Cel

-40 Cel

TIN

QUAD

.9 mm

9 mm

260

9 mm

CMOS

754 mA

1.8 V

.4 mm

S-XQCC-N76

3

6000 MHz

e3

8V19N882NVGI8

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

76

HVQCCN

SQUARE

UNSPECIFIED

YES

1.9 V

6000 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC76,35SQ,16

1.7 V

95 Cel

-40 Cel

TIN

QUAD

.9 mm

9 mm

260

9 mm

CMOS

754 mA

1.8 V

.4 mm

S-XQCC-N76

3

6000 MHz

e3

8V19N882NVGI/W

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

76

HVQCCN

SQUARE

UNSPECIFIED

YES

1.9 V

6000 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC76,35SQ,16

1.7 V

95 Cel

-40 Cel

TIN

QUAD

.9 mm

9 mm

260

9 mm

CMOS

754 mA

1.8 V

.4 mm

S-XQCC-N76

3

6000 MHz

e3

8V19N850DNLGI/W

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

88

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

2949.12 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC88,.4SQ,16

3.135 V

105 Cel

-40 Cel

TIN

QUAD

.9 mm

10 mm

260

10 mm

CMOS

1725 mA

3.3 V

.4 mm

S-XQCC-N88

3

1000 MHz

e3

8V19N850DNLGI8

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

88

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

2949.12 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC88,.4SQ,16

3.135 V

105 Cel

-40 Cel

TIN

QUAD

.9 mm

10 mm

260

10 mm

CMOS

1725 mA

3.3 V

.4 mm

S-XQCC-N88

3

1000 MHz

e3

8V19N850DNLGI

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

88

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

2949.12 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC88,.4SQ,16

3.135 V

105 Cel

-40 Cel

TIN

QUAD

.9 mm

10 mm

260

10 mm

CMOS

1725 mA

3.3 V

.4 mm

S-XQCC-N88

3

1000 MHz

e3

9SQL4952CNLGI8

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC24,.16SQ,20

3.135 V

85 Cel

-40 Cel

QUAD

1 mm

4 mm

4 mm

CMOS

23 mA

3.3 V

.5 mm

S-XQCC-N24

25 MHz

9SQL4958CNDGI

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

48

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC48,.24SQ,16

3.135 V

85 Cel

-40 Cel

QUAD

1 mm

6 mm

6 mm

CMOS

37 mA

3.3 V

.4 mm

S-XQCC-N48

25 MHz

9SQL4958CNDGI8

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

48

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC48,.24SQ,16

3.135 V

85 Cel

-40 Cel

QUAD

1 mm

6 mm

6 mm

CMOS

37 mA

3.3 V

.4 mm

S-XQCC-N48

25 MHz

9SQL4954CNLGI8

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

3.135 V

85 Cel

-40 Cel

QUAD

1 mm

5 mm

5 mm

CMOS

39 mA

3.3 V

.5 mm

S-XQCC-N32

25 MHz

9SQL4952CNLGI

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

24

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC24,.16SQ,20

3.135 V

85 Cel

-40 Cel

QUAD

1 mm

4 mm

4 mm

CMOS

23 mA

3.3 V

.5 mm

S-XQCC-N24

25 MHz

9SQL4954CNLGI

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

3.135 V

85 Cel

-40 Cel

QUAD

1 mm

5 mm

5 mm

CMOS

39 mA

3.3 V

.5 mm

S-XQCC-N32

25 MHz

PI6CG33402ZHIEX-13R

Diodes Incorporated

CLOCK GENERATOR, PCIe

INDUSTRIAL

NO LEAD

32

HVQCCN

SQUARE

UNSPECIFIED

YES

3.465 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC32,.2SQ,20

3.135 V

85 Cel

-40 Cel

QUAD

.8 mm

5 mm

5 mm

CMOS

25 mA

3.3 V

.5 mm

S-XQCC-N32

25 MHz

9SQ440NQQI

Renesas Electronics

CLOCK GENERATOR, PROCESSOR SPECIFIC

INDUSTRIAL

NO LEAD

100

HVQCCN

SQUARE

PLASTIC/EPOXY

YES

3.465 V

100 MHz

CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

LCC100,.31SQ,20

3.135 V

85 Cel

-40 Cel

TIN

QUAD

.65 mm

8 mm

260

8 mm

CMOS

3.3 V

.5 mm

S-PQCC-N100

3

25 MHz

e3

Clock Generators

A clock generator is an electronic circuit that generates an electrical signal that serves as a timing reference for other circuits in a system. Clock generators are used in many electronic devices, such as computers, cell phones, and digital cameras. The clock signal is used to synchronize the operation of different components in the system, such as microprocessors, memory devices, and input/output interfaces.

Clock generators can be classified based on their output frequency and stability. Some clock generators produce a fixed frequency output, while others have a programmable output frequency. The stability of the clock signal is also an important parameter, and clock generators can be designed to produce a stable frequency output over a wide range of temperature and voltage conditions.

Clock generators can also include additional features such as frequency multiplication, frequency division, and phase locking. Frequency multiplication allows the output frequency to be multiplied by an integer value, while frequency division allows the output frequency to be divided by an integer value. Phase locking is used to ensure that the output frequency of the clock generator is synchronized with an external reference signal.