Frequency (MHz)
| Primary uses
|
80.0000
| common CPU clock
|
66.667
| common CPU clock
|
50.000
| Fast Ethernet (2×25 MHz)
|
40.000
| common CPU clock, WiFi, OFDM
|
33.33
| common CPU clock
|
30.0000
| common CPU clock
|
29.4912
| UART clock (16×1.8432 MHz); allows integer division to common baud rates
|
28.636 MHz
| Master clock for some NTSC CCD cameras
|
28.375 MHz
| Master clock for some PAL CCD cameras; 2 periods per pixel, 1816 periods per scan line, 567500 periods per frame
|
28.224 MHz
| used in some modems
|
27.000
| Master clock for PAL/NTSC DVD players, Digital TV receivers, some modems etc. (27 MHz is an exact multiple of the PAL and NTSC line frequencies)
|
26.2144
| Popular for 102.4 kS/s, 204.8 kS/s or similar sampling systems, when a power-of-two size FFT follows the sampling. In this case the FFT frequency bins end up to be at "nice" frequencies for humans. Also allows integer division to 25 Hz and multiples of 25 Hz (50 Hz, 100 Hz, 200 Hz); 26.2144 MHz = 100 x 218 = 25 x 220.
|
26.000
| Commonly used as a reference clock for GSM and UMTS handsets. (26 MHz is exactly 96 times the GSM bit rate)
|
25.175
| Common Video Graphics Array pixel clock (i.e., 640x350@70 Hz,640x400@70 Hz, 640x480@60 Hz)[7]
|
25.000
| Fast Ethernet MII clock (100 Mbps/4-bit nibble)
|
24.576
| Digital audio systems - DAT, MiniDisc, AC'97, sound cards; 512×48 kHz (29×48 kHz); also used as bus reference clock in Firewire systems
|
24
| full-speed USB (24MHz * 20 = 480Mbit/s); LCD monitor some MCU
|
22.1184
| UART clock (12×1.8432 MHz); allows integer division to common baud rates
|
20.000
| 10 Mbit/s ethernet
|
19.6608
| Used in CDMA systems (4×4.9152); divided to 1.2288 MHz baseband frequency
|
18.432
| UART clock (10×1.8432 MHz); allows integer division to common baud rates. Also allows integer division to 48 kHz (384×48 kHz), 96 kHz, and 192 kHz sample rates used in high-end digital audio.
|
17.734475
| PAL B/G/H color subcarrier (4×4.433618 MHz)
|
16.9344
| Used in compact disc digital audio systems and CDROM drives; allows integer division to 44.1 kHz (384×44.1 kHz), 22.05 kHz, and 11.025 kHz. Also allows integer division to common UART baud rates.
|
16.368
| Commonly used for down-conversion and sampling in GPS-receivers. Generates intermediate frequency signal at 4.092 MHz. 16.3676 or 16.367667 MHz are sometimes used to avoid perfect lineup between sampling frequency and GPS spreading code.
|
14.7456
| UART clock (8×1.8432 MHz); allows integer division to common baud rates
|
14.31818
| NTSC M color subcarrier (4×3.579545 MHz). Common seed clock for modern PC motherboard clock generator chips, also common on VGA cards.
|
13.875
| Used in some teletext circuits; 2×6.9375 MHz (clock frequency of PAL B teletext; SECAM uses 6.203125 MHz, NTSC M uses 5.727272 MHz, PAL G uses 6.2031 MHz, and PAL I uses 4.4375 MHz clock)
|
13.56
| Common contactless smartcard frequency (ISO/IEC 14443)
|
13.500
| Master clock for PAL/NTSC DVD players, Digital TV receivers, etc. (13.5 MHz is an exact multiple of the PAL and NTSC line frequencies)
|
12.288
| Digital audio systems - DAT, MiniDisc, sound cards; 256×48 kHz (28×48 kHz). Also allows integer division to common UART baud rates up to 38400.
|
12.0000
| Used in USB systems as the reference clock for the full-speed PHY rate of 12 Mbit/s, or multiplied up using a PLL to clock high speed PHYs at 480 Mbit/s
|
11.2896
| Used in compact disc digital audio systems and CDROM drives; allows binary division to 44.1 kHz (256×44.1 kHz), 22.05 kHz, and 11.025 kHz
|
11.0592
| UART clock (6×1.8432 MHz); allows integer division to common baud rates
|
10.245
| Used in radio receivers; mixes with 10.7 MHz intermediate frequency (IF) yielding 455 kHz signal, a common second IF for FM radio[6]
|
9.83040
| Used in CDMA systems (2×4.9152 MHz); divided to 1.2288 MHz baseband frequency
|
9.216
| Allows integer division to 1024 kHz and binary division to lower frequencies that are whole multiples of 1 Hz.
|
8.86724
| PAL B/G/H color subcarrier (2×4.433618 MHz)
|
7.3728
| UART clock (4×1.8432 MHz); allows integer division to common baud rates
|
7.15909
| NTSC M color subcarrier (2×3.579545 MHz)
|
6.5536
| Allows binary division to 100 Hz (65,536×100 Hz, or 216×100 Hz); used also in red boxes
|
6.144
| Digital audio systems - DAT, MiniDisc, sound cards; 128×48 kHz (27×48 kHz). Also allows integer division to common UART baud rates up to 38,400.
|
4.9152
| Used in CDMA systems; divided to 1.2288 MHz baseband frequency as specified by J-STD-008
|
4.43361875
| PAL B/D/G/H/I and NTSC M4.43 color subcarrier
|
4.332
| The RDS signal bit rate is at 1.1875 kbit/s. While the frequency of 4.332 MHz is the most commonly used crystal resonator, its multiples (2×4.332 MHz = 8.664 MHz or 4×4.332MHz = 17.328 MHz) have been used also.
|
4.194304
| Real-time clocks, divides to 1 Hz signal (222×1 Hz)
|
4.096000
| Allows binary division to 1 kHz (212×1 kHz)
|
3.686400
| UART clock (2×1.8432 MHz); allows integer division to common baud rates
|
3.582056
| PAL N color subcarrier
|
3.579545
| NTSC M color subcarrier. Because these are very common and inexpensive they are used in many other applications, for example DTMF generators
|
3.575611
| PAL M color subcarrier
|
3.2768
| Allows binary division to 100 Hz (32,768×100 Hz, or 215×100 Hz)
|
2.4576
| UART clock; allows integer division to common baud rates up to 38,400. (215×31×52; 64×38,400 baud or 2048×1,200 baud)
|
1.8432
| UART clock; allows integer division to common baud rates. (213×32×52; 16×115,200 baud or 96×16×1,200 baud)
|
0.032768
| Real-time clocks, quartz watches and clocks; allows binary division to 1 Hz signal (215×1 Hz)
|
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