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

Renesas Electronics Mga Oscillator

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

Mga Uri ng Oscillator

Listahan Mga Larawan

Mga Resulta: 5,875

Mga Ginamit na Filter:

Manufacturer = Renesas Electronics

Uri ng Produkto

Package / Case

Frequency

Katatagan ng Frequency

Capacitance ng Load

Supply Voltage - Min

Supply Voltage - Max

Format ng Output

Istilo ng Termination

Minimum na Operating Temperature

Maximum na Operating Temperature

Haba

Lapad

Taas

Kuwalipikasyon

Packaging

I-reset Lahat

Maghanap sa loob ng mga resulta

May Stock

Karaniwang May Stock

Aktibo

Mga Bagong Produkto

Sumusunod sa RoHS

.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; }

# ng Piyesa

Standard Clock Oscillators 50 MHz, LVPECL 3.3V, 50 ppm

XLP735050.000000I
Renesas Electronics
1: ₱131.66
459May Stock

Mfr. # ng Piyesa
XLP735050.000000I

# ng Piyesa ng Mouser
972-XLP735050000000I

Renesas Electronics

Standard Clock Oscillators 50 MHz, LVPECL 3.3V, 50 ppm

Datasheet

459May Stock

Cut Tape

₱131.66

₱113.68

₱107.88

₱98.02

Tingnan

Reel

₱85.84

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

50 MHz

50 PPM

15 pF

3.135 V

3.465 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape

Standard Clock Oscillators 122.88 MHz, LVPECL 3.3V, 25 ppm

XLP736122.880000X
Renesas Electronics
1: ₱150.80
99May Stock

Mfr. # ng Piyesa
XLP736122.880000X

# ng Piyesa ng Mouser
972-XLP736122880000X

Renesas Electronics

Standard Clock Oscillators 122.88 MHz, LVPECL 3.3V, 25 ppm

Datasheet

99May Stock

Cut Tape

₱150.80

₱129.92

₱123.54

₱111.94

Tingnan

Reel

₱99.18

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

122.88 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVPECL

SMD/SMT

- 20 C

+ 70 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape

Standard Clock Oscillators 707.35 MHz, LVPECL 3.3V, 25 ppm

XLP736707.350000X
Renesas Electronics
1: ₱150.80
166May Stock

Mfr. # ng Piyesa
XLP736707.350000X

# ng Piyesa ng Mouser
972-XLP736707350000X

Renesas Electronics

Standard Clock Oscillators 707.35 MHz, LVPECL 3.3V, 25 ppm

Datasheet

166May Stock

Cut Tape

₱150.80

₱129.92

₱123.54

₱111.94

Tingnan

Reel

₱99.18

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

707.35 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVPECL

SMD/SMT

- 20 C

+ 70 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape

VCXO Oscillators 27 MHz, LVPECL 3.3V, 50 ppm APR

XLP73V027.000000I
Renesas Electronics
1: ₱131.66
183May Stock

Mfr. # ng Piyesa
XLP73V027.000000I

# ng Piyesa ng Mouser
972-XLP73V027000000I

Renesas Electronics

VCXO Oscillators 27 MHz, LVPECL 3.3V, 50 ppm APR

Datasheet

183May Stock

Cut Tape

₱131.66

₱113.68

₱107.88

₱98.02

Tingnan

Reel

₱85.84

Min.: 1
Mult.: 1

Reel: 1,000

VCXO

7 mm x 5 mm

27 MHz

50 PPM

15 pF

3.135 V

3.465 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.3 mm

Reel, Cut Tape

VCXO Oscillators 245.76 MHz, LVPECL 3.3V, 50 ppm APR

XLP73V245.760000I
Renesas Electronics
1: ₱150.80
103May Stock

Mfr. # ng Piyesa
XLP73V245.760000I

# ng Piyesa ng Mouser
972-XLP73V245760000I

Renesas Electronics

VCXO Oscillators 245.76 MHz, LVPECL 3.3V, 50 ppm APR

Datasheet

103May Stock

Cut Tape

₱150.80

₱129.92

₱123.54

₱111.94

Tingnan

Reel

₱99.18

Min.: 1
Mult.: 1

Reel: 1,000

VCXO

7 mm x 5 mm

245.76 MHz

50 PPM

15 pF

3.135 V

3.465 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

7 mm

5 mm

1.3 mm

Reel, Cut Tape

Standard Clock Oscillators XLX3 5032 HCMOS XO LOW JITTER

XLX325125.000000K
Renesas Electronics
1: ₱178.06
165May Stock

Mfr. # ng Piyesa
XLX325125.000000K

# ng Piyesa ng Mouser
972-XLX325125000000K

Renesas Electronics

Standard Clock Oscillators XLX3 5032 HCMOS XO LOW JITTER

Datasheet

165May Stock

Cut Tape

₱178.06

₱177.48

₱128.76

₱127.60

₱124.70

Reel

₱117.16

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 2,000

Standard Oscillators

3.2 mm x 2.5 mm

125 MHz

50 PPM

15 pF

2.375 V

2.625 V

HCMOS

SMD/SMT

- 40 C

+ 105 C

3.2 mm (0.126 in)

2.5 mm (0.098 in)

0.9 mm (0.035 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 27.12 MHz, HCMOS 1.8V, 20 ppm

XUH518027.120000X
Renesas Electronics
1: ₱138.62
495May Stock

Mfr. # ng Piyesa
XUH518027.120000X

# ng Piyesa ng Mouser
972-XUH518027120000X

Renesas Electronics

Standard Clock Oscillators 27.12 MHz, HCMOS 1.8V, 20 ppm

Datasheet

495May Stock

Cut Tape

₱138.62

₱119.48

₱113.10

₱103.24

Tingnan

Reel

₱91.06

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

27.12 MHz

20 PPM

10 pF

1.71 V

1.89 V

HCMOS

SMD/SMT

- 20 C

+ 70 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape

Standard Clock Oscillators XUL5 5032 HCMOS XO LOW JITTER

XUL535390.625000I
Renesas Electronics
1: ₱196.62
97May Stock

Mfr. # ng Piyesa
XUL535390.625000I

# ng Piyesa ng Mouser
972-XUL535390625000I

Renesas Electronics

Standard Clock Oscillators XUL5 5032 HCMOS XO LOW JITTER

Datasheet

97May Stock

Cut Tape

₱196.62

₱169.36

₱161.24

₱153.12

Tingnan

Reel

₱135.14

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

390.625 MHz

50 PPM

15 pF

3.135 V

3.465 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape

Standard Clock Oscillators 307.2 MHz, LVDS 2.5V, 20 ppm

XUL728307.200000X
Renesas Electronics
1: ₱191.98
196May Stock

Mfr. # ng Piyesa
XUL728307.200000X

# ng Piyesa ng Mouser
972-XUL728307200000X

Renesas Electronics

Standard Clock Oscillators 307.2 MHz, LVDS 2.5V, 20 ppm

Datasheet

196May Stock

Cut Tape

₱191.98

₱165.30

₱157.18

₱142.68

Tingnan

Reel

₱125.86

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

307.2 MHz

20 PPM

15 pF

2.375 V

2.625 V

LVDS

SMD/SMT

- 20 C

+ 70 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape

Standard Clock Oscillators XUP5 5032 HCMOS XO LOW JITTER

XUP526025.000000I
Renesas Electronics
1: ₱185.02
150May Stock

Mfr. # ng Piyesa
XUP526025.000000I

# ng Piyesa ng Mouser
972-XUP526025000000I

Renesas Electronics

Standard Clock Oscillators XUP5 5032 HCMOS XO LOW JITTER

Datasheet

150May Stock

Cut Tape

₱185.02

₱183.86

₱145.00

₱142.68

Reel

₱121.80

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

25 MHz

25 PPM

15 pF

2.375 V

2.625 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape

Standard Clock Oscillators XUQ5 5032 HCMOS XO LOW JITTER

XUQ518150.000000X
Renesas Electronics
1: ₱201.26
109May Stock

Mfr. # ng Piyesa
XUQ518150.000000X

# ng Piyesa ng Mouser
972-XUQ518150000000X

Renesas Electronics

Standard Clock Oscillators XUQ5 5032 HCMOS XO LOW JITTER

Datasheet

109May Stock

Cut Tape

₱201.26

₱154.28

₱151.96

Reel

₱135.14

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

150 MHz

20 PPM

15 pF

1.71 V

1.89 V

LVPECL

SMD/SMT

- 20 C

+ 70 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape

Standard Clock Oscillators 12MHz 3.3V 50ppm -40C to 85C

XLH335012.000000I
Renesas Electronics
1: ₱88.16
1,980Inaasahan 5/1/2026

Mfr. # ng Piyesa
XLH335012.000000I

# ng Piyesa ng Mouser
972-LH335012.000000I

Renesas Electronics

Standard Clock Oscillators 12MHz 3.3V 50ppm -40C to 85C

Datasheet

1,980Inaasahan 5/1/2026

Cut Tape

₱88.16

₱75.98

₱71.92

₱65.54

Tingnan

Reel

₱54.87

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 2,000

Standard Oscillators

3.2 mm x 2.5 mm

12 MHz

50 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 40 C

+ 85 C

3.2 mm (0.126 in)

2.5 mm (0.098 in)

0.9 mm (0.035 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 25MHZ

XLH535025.000000I
Renesas Electronics
1: ₱84.68
2,000Inaasahan 4/20/2026

Mfr. # ng Piyesa
XLH535025.000000I

# ng Piyesa ng Mouser
972-LH535025.000000I

Renesas Electronics

Standard Clock Oscillators 25MHZ

Datasheet

2,000Inaasahan 4/20/2026

Cut Tape

₱84.68

₱73.66

₱66.70

₱64.38

Tingnan

Reel

₱54.87

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

25 MHz

50 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 25MHz 3.3Volts 25ppm -40C +85C

XLH736025.000000I
Renesas Electronics
1: ₱94.54
1,338Inoorder

Mfr. # ng Piyesa
XLH736025.000000I

# ng Piyesa ng Mouser
972-LH736025.000000I

Renesas Electronics

Standard Clock Oscillators 25MHz 3.3Volts 25ppm -40C +85C

Datasheet

1,338Inoorder

Cut Tape

₱94.54

₱82.36

₱74.82

₱71.34

Tingnan

Reel

₱62.06

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

25 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 50 MHZ OSCILLATOR

XLH736050.000000I
Renesas Electronics
1: ₱94.54
2,960Inoorder

Mfr. # ng Piyesa
XLH736050.000000I

# ng Piyesa ng Mouser
972-LH736050.000000I

Renesas Electronics

Standard Clock Oscillators 50 MHZ OSCILLATOR

Datasheet

2,960Inoorder

Cut Tape

₱94.54

₱82.36

₱74.82

₱74.24

Tingnan

Reel

₱62.06

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

50 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators XFP336312.50000 PROGRAMMABLE XO

XFP336312.500000I
Renesas Electronics
1: ₱534.76
400Inaasahan 4/20/2026

Mfr. # ng Piyesa
XFP336312.500000I

# ng Piyesa ng Mouser
972-XFP336312500000I

Renesas Electronics

Standard Clock Oscillators XFP336312.50000 PROGRAMMABLE XO

Alamin Pa

Datasheet

400Inaasahan 4/20/2026

₱534.76

₱451.82

₱424.56

₱414.12

₱400.20

Min.: 1
Mult.: 1

Standard Oscillators

312.5 MHz

25 PPM

3.135 V

3.465 V

LVPECL

SMD/SMT

- 40 C

+ 85 C

3.2 mm (0.126 in)

2.5 mm (0.098 in)

0.85 mm (0.033 in)

Cut Tape

Standard Clock Oscillators 26.666 MHz, HCMOS 3.3V, 25 ppm

XLH536026.666000I
Renesas Electronics
1: ₱138.62
1,000Inaasahan 5/12/2026

Mfr. # ng Piyesa
XLH536026.666000I

# ng Piyesa ng Mouser
972-XLH536026666000I

Renesas Electronics

Standard Clock Oscillators 26.666 MHz, HCMOS 3.3V, 25 ppm

Datasheet

1,000Inaasahan 5/12/2026

Cut Tape

₱138.62

₱119.48

₱113.10

₱103.24

Tingnan

Reel

₱91.06

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

26.666 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape

Standard Clock Oscillators 200 MHz, LVDS 2.5V, 50 ppm

XLL525200.000000I
Renesas Electronics
1: ₱154.28
998Inaasahan 4/20/2026

Mfr. # ng Piyesa
XLL525200.000000I

# ng Piyesa ng Mouser
972-XLL525200000000I

Renesas Electronics

Standard Clock Oscillators 200 MHz, LVDS 2.5V, 50 ppm

Datasheet

998Inaasahan 4/20/2026

Cut Tape

₱154.28

₱133.98

₱121.80

₱116.58

Tingnan

Reel

₱107.88

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

200 MHz

50 PPM

15 pF

2.375 V

2.625 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators XUL5 5032 LVDS XO LOW JITTER

XUL535125.000000I
Renesas Electronics
1: ₱196.62
1,549Inaasahan 3/17/2026

Mfr. # ng Piyesa
XUL535125.000000I

# ng Piyesa ng Mouser
972-XUL535125000000I

Renesas Electronics

Standard Clock Oscillators XUL5 5032 LVDS XO LOW JITTER

Datasheet

1,549Inaasahan 3/17/2026

Cut Tape

₱196.62

₱169.36

₱161.24

₱153.12

Tingnan

Reel

₱135.14

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

125 MHz

50 PPM

3.135 V

3.465 V

LVDS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators XpressO Oscillator

XLH336012.000000X
Renesas Electronics
1: ₱88.16
1,007Inaasahan 3/30/2026

Mfr. # ng Piyesa
XLH336012.000000X

# ng Piyesa ng Mouser
972-LH336012.000000X

Renesas Electronics

Standard Clock Oscillators XpressO Oscillator

Datasheet

1,007Inaasahan 3/30/2026

Cut Tape

₱88.16

₱75.98

₱71.92

₱65.54

Tingnan

Reel

₱54.87

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 2,000

Standard Oscillators

3.2 mm x 2.5 mm

12 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 20 C

+ 70 C

3.2 mm (0.126 in)

2.5 mm (0.098 in)

0.9 mm (0.035 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 7.5MHZ

XLH730007.500000X
Renesas Electronics
1: ₱123.54
763Inaasahan 3/23/2026

Mfr. # ng Piyesa
XLH730007.500000X

# ng Piyesa ng Mouser
972-LH730007.500000X

Renesas Electronics

Standard Clock Oscillators 7.5MHZ

Datasheet

763Inaasahan 3/23/2026

Cut Tape

₱123.54

₱106.14

₱100.92

₱91.64

Tingnan

Reel

₱79.46

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

7.5 MHz

100 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 20 C

+ 70 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 45.1584MHZ

XLH735045.158400X
Renesas Electronics
1: ₱123.54
990Inaasahan 4/6/2026

Mfr. # ng Piyesa
XLH735045.158400X

# ng Piyesa ng Mouser
972-LH735045.158400X

Renesas Electronics

Standard Clock Oscillators 45.1584MHZ

Datasheet

990Inaasahan 4/6/2026

Cut Tape

₱123.54

₱106.14

₱100.92

₱91.64

Tingnan

Reel

₱79.46

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

45.1584 MHz

50 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 20 C

+ 70 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 1MHz 3.3Volt 25ppm -40C +85C

XLH736001.000000I
Renesas Electronics
1: ₱94.54
998Inaasahan 3/31/2026

Mfr. # ng Piyesa
XLH736001.000000I

# ng Piyesa ng Mouser
972-LH736001.000000I

Renesas Electronics

Standard Clock Oscillators 1MHz 3.3Volt 25ppm -40C +85C

Datasheet

998Inaasahan 3/31/2026

Cut Tape

₱94.54

₱82.36

₱74.82

₱71.34

Tingnan

Reel

₱62.06

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

1 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 27.0MHz 3.3Volt 25ppm -40C +85C

XLH736027.000000I
Renesas Electronics
1: ₱99.76
864Inaasahan 6/3/2026

Mfr. # ng Piyesa
XLH736027.000000I

# ng Piyesa ng Mouser
972-LH736027.000000I

Renesas Electronics

Standard Clock Oscillators 27.0MHz 3.3Volt 25ppm -40C +85C

Datasheet

864Inaasahan 6/3/2026

Cut Tape

₱99.76

₱85.84

₱81.78

₱74.24

Tingnan

Reel

₱62.06

Available ang MouseReel

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

7 mm x 5 mm

27 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 40 C

+ 85 C

7 mm (0.276 in)

5 mm (0.197 in)

1.3 mm (0.051 in)

Reel, Cut Tape, MouseReel

Standard Clock Oscillators 36 MHz, HCMOS 3.3V, 25 ppm

XLH536036.000000I
Renesas Electronics
1: ₱138.62
760Inoorder

Mfr. # ng Piyesa
XLH536036.000000I

# ng Piyesa ng Mouser
972-XLH536036000000I

Renesas Electronics

Standard Clock Oscillators 36 MHz, HCMOS 3.3V, 25 ppm

Datasheet

760Inoorder

Cut Tape

₱138.62

₱119.48

₱113.10

₱103.24

Tingnan

Reel

₱91.06

Min.: 1
Mult.: 1

Reel: 1,000

Standard Oscillators

5 mm x 3.2 mm

36 MHz

25 PPM

15 pF

3.135 V

3.465 V

LVCMOS

SMD/SMT

- 40 C

+ 85 C

5 mm (0.197 in)

3.2 mm (0.126 in)

1.1 mm (0.043 in)

Reel, Cut Tape

Renesas Electronics Mga Oscillator

Mga Uri ng Oscillator

Customer Service Office

Kumpanya

Mga Mapagkukunan

Suporta

17.734475 Hz
16 kHz
20 kHz
32 kHz
32.576 kHz
32.767 kHz
32.768 kHz
33.33 kHz
34.133 kHz
38 kHz
40 kHz
42 kHz
44 kHz
50 kHz
64 kHz
75 kHz
96 kHz
100 kHz
127.7 kHz
127.722 kHz