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crystals.txt
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processor oscillator spec measured(ppm)
avr 328p 16Mhz resonator 0.5% -1330 uno
avr 328p 16MHz resonator 0.5% -1422 breadboard 328p
" 16MHz crystal 50ppm 5 breadboard 328p
" 8MHz crystal 50ppm -2 breadboard 328p 5v 22pf
" 8MHz crystal 50ppm -16 " 3.3v 22pf
" 8MHz crystal 50ppm 184 " 3.3v NO caps
" 8MHz crystal 50ppm 217 " 5v NO caps
avr 328p 16Mhz resonator 0.5% 1258 nano gravitech
avr 328p 16Mhz resonator 0.5% -3283 nano china
avr 328p 11Mhz crystal 30ppm -23 ermicro 3.74v batteries
" 11Mhz crystal 30ppm -19 " 5v CR11.0592MHZ
" 11Mhz crystal 30ppm -20 " 3.3v
avr 328p 8Mhz resonator 0.5% -4330 pro mini 3.3v
avr 328p 12Mhz resonator 0.5% -3729 pro trinket 3.3v
avr 128 14Mhz crystal 30ppm 2 14.7ECSR java 1736 ppm
avr 2560 R3 16Mhz resonator 0.5% 872 cstce 16mov53-r0
AT90USB1286 16Mhz crystal 15ppm -6 teensy++2 NDK NX3225SA-16
atmega32u4 16Mhz crystal 15ppm 3 teensy2 NDK NX3225SA-16
atmega32u4 16Mhz crystal 30ppm -9 leonardo TXC 7B
atmega32u4 16Mhz crystal 30ppm 2 littlebits TXC 7B
atmega32u4 8Mhz resonator 0.5% -51 playground CSTCE8M00G55-R0
atmega32u4 8Mhz resonator 0.5% -1751 feather CSTCE8M00G55-R0
atmega32u4 8Mhz resonator 0.5% -2484 feather CSTCE8M00G55-R0
atmega32u4 8Mhz resonator 0.5% -353 feather CSTCE8M00G55-R0
avr 1284p 16Mhz crystal 30ppm -26 foxslf-160-20 sbbb
nRF51822 16MHz RC 1% 333 microbit
nRF51822 16MHz RC 1% 331 microbit
nRF51822 16MHz RC 1% 305 BLE Nano ? 32khz crystal
DUE 12MHz*x crystal 30ppm -4 12MHz KX-7 20pf smd
DUE RTC 32Khz crystal 20ppm -3 check using RTT or RTC
DUE RC 32KHz RC 11% -117701
ZERO 32Khz*x crystal 20ppm -556 MS1V-T1K 1464*32768
ZERO 32Khz crystal 20ppm 18 MS1V-T1K 32.768kHz
ZERO RC 32khz RC 5.5% -4989 OSCULP32K
ZERO RC 32khz RC 1.5% -2953 OSC32K NVM calibrated
ZERO RC 8MHz RC 0.75% 4167 OSC8M
R4 16MHZ crystal ? 9
M0 BLE 32Khz*x crystal ? 689 ? 1464*32768 -576 ppm
M0 BLE RTC 32Khz crystal ? 12 ? XOSC32K
M0 BLE RC 32Khz RC 1.5% 187693 ? OSC32K
M0 BLE RC 32Khz RC 5.5% -3967 ? OSCULP32K
M0 BLE RC 8MHZ RC 0.75% 1169 ? OSC8M
M0 logger 32Khz*x crystal 20 269 adalogger NX3215SA
M0 log RTC 32Khz crystal 20 21 adalogger NX3215SA
artemis BLE 32Khz*x crystal 20 1806 sparkfun micromod
artemis RTC 32Khz crystal 20 21 sparkfun micromod
CPX RC 48MHz RC 1.5% 25 OSC32K circuitplayground express NVM calibrated
Ada M4 32khz crystal 20ppm -138 NX3215SA-32.768K SAMD51
Ada M4 RTC 32khz crystal 20ppm 5 NX3215SA-32.768K SAMD51
Ada M4 RC 32khz RC 2% 11574 SAMD51
Ada M4 32khz crystal 20ppm -1349 NX3215SA-32.768K SAMD51 m4-2
Ada M4 RTC 32khz crystal 20ppm 12 NX3215SA-32.768K SAMD51 m4-2
M4mm 32khz crystal 20ppm -1446 sparkfun micromod m4
M4mm RTC 32khz crystal 20ppm 45 sparkfun micromod m4
maple r5 8MHz*9 crystal 20ppm -7 ABM3B-8.000MHZ-B2-T
maple r5 8MHz*9 crystal 20ppm -5 " RET6
teensy 3.0 16MHz*6 crystal 15ppm -5 NDK NX3225SA-16 tunable
teensy 3.1 16MHz*6 crystal 15ppm -18 NDK NX3225SA-16 tunable
teensy 3.2 16MHz*6 crystal 18ppm -21 EPSON TSX-3225
teensy 3.2 16MHz*6 crystal 18ppm -22 EPSON TSX-3225 ps
teensy 3.2 16MHz*6 crystal 18ppm -15 EPSON TSX-3225 aa
teensy 3.2 16MHz*6 crystal 18ppm -20 EPSON TSX-3225 8/12/19 female
teensy 3.2 16MHz*6 crystal 18ppm -22 EPSON TSX-3225 9/16/19 feather
teensy LC 16MHz*6 crystal 18ppm 13 EPSON TSX-3225 beta tunable
teensy LC 16MHz*6 crystal 18ppm 20 EPSON TSX-3225 green tunable
teensy K66 16MHz crystal 18ppm -8 EPSON TSX-3225 proto6
RTC 32KHz crystal 10ppm -9 CFS-20632768EZFB
teensy K66 16MHz crystal 18ppm -6 EPSON TSX-3225 beta
RTC 32KHz crystal 10ppm -7 CFS-20632768EZFB
teensy K66 16MHz crystal 18ppm -7 EPSON TSX-3225 no pins
RTC 32KHz crystal 10ppm -12 CFS-20632768EZFB
teensy K64 16MHz crystal 18ppm -19 EPSON TSX-3225 beta
RTC 32KHz crystal 10ppm -11 CFS-20632768EZFB
teensy K64 16MHz crystal 18ppm -18 EPSON TSX-3225 ks
RTC 32KHz crystal 10ppm -9 CFS-20632768EZFB
teensy K64 16MHz crystal 18ppm -18 EPSON TSX-3225 no pins
RTC 32KHz crystal 10ppm -8 CFS-20632768EZFB
T4 beta1 24MHz crystal 30ppm -3 ? NXP 1052
RTC 32KHz crystal 10ppm -5 CFS-20632768EZFB ?
T4 beta1-2 24MHz crystal 30ppm -4 ? NXP 1052
RTC 32KHz crystal 10ppm -4 CFS-20632768EZFB ?
T4 beta2 24MHz crystal 30ppm 1 ? NXP 1062
RTC 32KHz crystal 10ppm -6 CFS-20632768EZFB ?
T4 beta2-2 24MHz crystal 30ppm -11 ? NXP 1062 T4B2R
RTC 32KHz crystal 10ppm 10 CFS-20632768EZFB ?
T4-1 24MHz crystal 30ppm -11 ? NXP 1062 T4-1
RTC 32KHz crystal 10ppm -3 CFS-20632768EZFB ?
T4-2 24MHz crystal 30ppm -10 ? NXP 1062 T4-2
RTC 32KHz crystal 10ppm -5 CFS-20632768EZFB ?
T4.1 24MHz crystal 30ppm -7 ? NXP 1062 T4.1
RTC 32KHz crystal 10ppm -2 CFS-20632768EZFB ?
T4.1-3 24MHz crystal 30ppm -11 ? NXP 1062 T4.1
RTC 32KHz crystal 10ppm 1 CFS-20632768EZFB ?
T4mm 24MHz crystal 20ppm? -45 T4 micromod
RTC 32KHz crystal 20ppm -6
NXP 1170 24MHz crystal 20ppm 34 1170 EVK
RTC 32KHz crystal 20ppm -47
RC 24MHz RC ? 920 GPT RC clock
NXP 1110 24MHz crystal 20ppm 22 1110 EVK
RTC 32KHz crystal 20ppm 44
WICED 26MHz ? ? 8 STM32F205
RTC 32KHz ? ? 62 LSEON
photon 26MHz ? ? 9 STM32F205
RTC 32KHz ? ? 60 LSEON
pyboard 8MHz*21 crystal 30ppm 33 TXC 7A-8.000MAAE-T v1.0
pyboard RTC 32khz cyrstal 50ppm 170 onboard 9HT10-32.768KBZF-T
pyboard 12MHz*14 crystal 30ppm 19 TXC 7A-8.000MAAE-T? v1.1
pyboard RTC 32khz cyrstal 50ppm 180 onboard 9HT10-32.768KBZF-T
DISCOVERY 8MHz*21 crystal 20ppm 75 HC-49S-C20QSA-8.000MHZ
STM32F405 12MHz*14 crystal ? -6 adafruit
RTC 32KHz crystal ? 77
pico mm 12MHz crystal 20ppm -10 sparkfun micromod pico
pico 12MHz crystal 30ppm 4.5 rpi pico RP2040
pico 12MHz crystal 30ppm 2.8 rpi pico RP2040
pico 12MHz crystal 25ppm 2 arduino pico RP2040 DSC6111HI2B
edison 19.2MHz*26 crystal ? -3 millis()/rdtsc -1600
propeller 5Mhz*16 crystal 30ppm -17 board1 (quickstart)
propeller 5Mhz*16 crystal 30ppm -25 board2 (") ABLS-5.000MHZ-B4-T
mbed 1768 12MHz*6 crystal 50ppm -2 ase-12-d-ct LPC1768
1768 RTC 32khz crystal 20ppm 20 FC-135 32.768KHZ test via WDT
mbed K64F 25MHz*x crystal 50ppm 20 403I35D25M00000 @120mhz
K64F RTC 32KHz crystal 20ppm 274 ABS07-32.768KHZ-T
mbed F446RE 8MHz*x crystal 20ppm -20 9SL8000012AFXHF0-SJ28 @180mhz
F446RE RTC 32KHz crystal 20ppm 27 ABS25-32.768KHZ-6-T
mbed F469NI 8MHz*x crystal 20ppm -17 NX3225GD-8.00M @168mhz
F469NI RTC 32KHz crystal 20ppm -2 NX3215SA-32.768K
mbed F767ZI 8MHz*x crystal 50ppm -2 NX3225GD-8.00M @216mhz
F767ZI RTC 32KHz crystal 20ppm -10 NX3215SA-32.768K
mbed L476VG 4MHz RC 0.25% -569 MSI 122*32768 = -576 ppm
RTC 32KHz crystal 20ppm 9 NX3215SA EXS00A-MU00525
mbed L476RG 4MHz RC 0.25% -578 9SL8000012AFXHF0-SJ28
RTC 32KHz crystal 20ppm -7 ABS25-32.768KHZ-6-T
mbed M7 24MHz crystal 30ppm -14 MXRT1050-EVK TXC 7V24000002
RTC 32KHz crystal 20ppm -54 epson FC-135 32.7680KA-AG3
mbed M7 24MHz crystal 30ppm -6 MXRT1050-EVKB TXC 7V24000002
RTC 32KHz crystal 20ppm -52 epson FC-135 32.7680KA-AG3
mbed M7 24MHz crystal 30ppm -8 MXRT1060-EVK TXC 7V24000002
RTC 32KHz crystal 20ppm 10 epson FC-135 32.7680KA-AG3
ESP8266 26MHz crystal ? -25 ? sparkfun dev board
ESP32 26MHz crystal ? 11 ? sparkfun dev board
CC3200 40MHz crystal 10ppm 1 Q24FA20H00396
slow clock 32KHz crystal 20ppm 151 Abracon ABS07-32.768KHZ-T
STM32L476 16MHz crystal 10ppm -13 Seiko Epson FA-20H dragonfly
RTC 32KHz crystal 20ppm 14 ABS05
STM32L433 32Khz crystal 20ppm 13 ST2012SB32768Z0HPWBB butterfly
ds1307 RTC 32khz cyrstal 20ppm 23 "watch" crystal i2c
ds1307 RTC 32khz cyrstal 20ppm 13 i2c
ds3231 RTC 32khz cyrstal 2ppm 1 chronodot TCXO i2c
ds3234 RTC 32khz cyrstal 2ppm 1 TCXO SPI
ds1077 133.33MHz osc 0.5% 1175 5v @ 16259 Hz
maple RTC 32khz cyrstal 20ppm -41 breadboard 512hz ticks
" 56 NO 22pf capacitors
32khz crystal 20ppm -13 another crystal
" crystal 20ppm 92 NO 22pf caps
32khz crystal 20ppm -110 another crystal
" crystal 20ppm 91 NO 22pf caps
328p RTC 32khz crystal 20ppm -67 breadboard 328p/RC crystal
" crystal 20ppm -54 " fewer cap wires
" crystal 20ppm -56 " fewer cap wires,3.3v
" crystal 20ppm 13 " NO caps 5v
" crystal 20ppm 11 " NO caps 3.3v
bad? 32khz crystal 20ppm -891019 breadboard 512hz ticks
" 1907 with no caps
teensy RTC 32khz cyrstal 20ppm tunable select internal capacitance
226 ppm 0pf
176 2pf
137 4
83 8
16 16
4 20pf default
-3 22
-22 28
-26 30 pf
avr 168 RC 8Mhz RC 10% -2100 OSCCAL units 4000 ppm 3.8v
" RC 8Mhz RC 10% -6404 3.3v
" RC 8Mhz RC 10% 10902 5.0v
avr 328 RC 8Mhz RC 10% 2108 OSCCAL units 3000 ppm 5v
avr328p RC 8Mhz RC 10% 4061 OSCCAL units 4000 ppm 5v
" RC 8Mhz RC 10% -270 3.3v
avr 328p RC 8Mhz RC 10% 21721 OSCCAL units 5000 ppm 3.8v
" RC 8Mhz RC 10% -2757 OSCCAL 0x88 (factory 8d)
" RC 8Mhz RC 10% -7256 OSCCAL 0x88 3.3v
" RC 8Mhz RC 10% 4449 OSCCAL 0x88 5v
avr 328p RC 8Mhz RC 10% 7107 OSCCAL 0x8d uno 5v 8c 1344
avr 328p RC 8Mhz RC 10% -4398 OSCCAL 0x46 5v (factory 4b)
avr 328p RC 8Mhz RC 10% -17 OSCCAL 0xA3 3.35v (factory A4)
nano 328p RC 8Mhz RC 10% 2128 OSCCAL 0xb7 5v
avr 328p RC 8Mhz RC 10% 2037 OSCCAL 0xa3 pro mini 3.3v
avr 2560 RC 8Mhz RC 10% -775 OSCCAL 0x80 R3 (fact 83)
avr1284p RC 8Mhz RC 10% -315 OSCCAL 0xA2 (fact A4)
mega32u4 RC 8Mhz RC 10% 679 OSCCAL 0x53 (fact 55) leonardo
mega32u4 RC 8Mhz RC 10% -1721 OSCCAL 0x70 (fact 73) littlebits
mega32u4 RC 8Mhz RC 10% 574 OSCCAL 0x71 feather 3.3v
attiny84 RC 8Mhz RC 10% 111 OSCCAL 0x83 (fact 89)
maple LSI 40KHz RC 50% -19659 calibrate with prescale RET6
maple LSI 40KHz RC 50% 5475 calibrate with prescale REV3
pyboard LSI 32KHz RC 30% -52490 LSI calibrate for RTC
STM32F405LSI 32KHz RC 30% 25150 LSI calibrate for RTC
STM32L476 32KHz RC 6% -15336 LSI driving RTC
STM32L433 32KHz RC 6% -10898 LSI driving RTC
DISCOVERY 32KHz RC 30% -2260 LSI calibrate for RTC
teensy 3.2 1KHz RC 10% 3182 LPTMR LPO
teensy 3.2 1KHz RC 10% 18693 LPTMR LPO w/ps
teensy 3.2 1KHz RC 10% -264 LPTMR LPO w/aa
teensy LC 1KHz RC 10% 6421 LPTMR LPO beta
teensy LC 1KHz RC 10% -18548 LPTMR LPO
teensy LC 4MHz RC 0.6% 2737 TPM MCGIRCLK
teensy K66 1KHz RC 10% -3932 LPTMR LPO proto
teensy K66 1KHz RC 10% -3512 LPTMR LPO beta
teensy K66 1KHz RC 10% -17966 LPTMR LPO
teensy K64 1KHz RC 10% 117 LPTMR LPO beta
teensy K64 1KHz RC 10% -6333 LPTMR LPO ks
teensy K64 1KHz RC 10% 11446 LPTMR LPO
WICED 32KHz RC 47% -69178 RTC with LSI
photon 32KHz RC 47% -45091 RTC with LSI
mbed IRC 4Mhz RC 1% -2979 test via WDT LPC1768
K64F IRC 1KHz RC 10% -5000 LPTMR LP0
F446RE IRC 32KHz RC 46% 34 RTC with LSI
STM32L476 32KHz RC 6% -24608 RTC with LSI mbed
F469NI IRC 32KHz RC 46% -2 RTC with LSI
avr328pWDT 128KHz RC 10%? -20606 WDT 16ms UNO
avr328pWDT 128KHz RC 10%? -25453 WDT 16ms 3.3v pro mini
avr328pWDT 128KHz RC 10%? -66262 WDT 16ms 3.3v pro trinket
atmega32u4 128KHz RC 10%? -24620 WDT 16ms Teensy 2
atmega32u4 128KHz RC 10%? 71764 WDT 16ms leonardo
atmega32u4 128KHz RC 10%? -81229 WDT 16ms littlebits
atmega32u4 128KHz RC 10%? 78180 WDT 16ms playground 3v3 8mhz
atmega32u4 128KHz RC 10%? -41400 WDT 16ms feather 3v3 8mhz
atmega32u4 128KHz RC 10%? -53439 WDT 16ms feather 3v3 8mhz
beagle 24MHz*x 30ppm -5 ntp drift CS325-24.000MABJ-UT
raspberry 19.2MHz*x -16 ntp drift XGH 19.200A76
littlebits 24Mhz*20 -1 ntp drift cloud module
edison 19.2*26mhz -5 udp drift yocto linux
dell desk -26 ntp drift
dell laptop -14 ntp drift
macbook pro -18 ntp drift
-- spec is frequency tolerance in ppm @25C