 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
STM32WB55 Datasheet(PDF) 119 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
STM32WB55 Datasheet(HTML) 119 Page - STMicroelectronics |
|
|
119 / 193 page  DS11929 Rev 11 119/193 STM32WB55xx STM32WB35xx Electrical characteristics 169 6.3.10 External clock source characteristics High-speed external user clock generated from an external source The high-speed external (HSE) clock is supplied with a 32 MHz crystal oscillator or a sine or a square wave. The devices include internal programmable capacitances that can be used to tune the crystal frequency in order to compensate the PCB parasitic one. The characteristics in Table 54 and Table 55 are measured over recommended operating conditions, unless otherwise specified. Typical values are referred to TA = 25 °C and VDD = 3.0 V. Table 54. HSE crystal requirements(1) Symbol Parameter Conditions Min Typ Max Unit fNOM Oscillator frequency - - 32 - MHz fTOL Frequency tolerance Includes initial accuracy, stability over temperature, aging and frequency pulling due to incorrect load capacitance. -- (2) ppm CL Load capacitance - 6 - 8 pF ESR Equivalent series resistance - - - 100 Ω 1. 32 MHz XTAL is specified for two specific references: NX2016SA and NX1612SA. 2. Refer to the standard specification: 50 ppm for BLE, 40 ppm for 802.15.4 and when both BLE and 802.15.4 are used. Table 55. HSE clock source requirements(1) Symbol Parameter Conditions Min Typ Max Unit fHSE_ext User external clock source frequency -- 32 - MHz fTOL Frequency tolerance Includes initial accuracy, stability over temperature and aging. -- (2) ppm VHSE Clock input voltage limits Sine or square wave, AC-coupled(3) 0.4 - 1.6 VPP DuCy(HSE) Duty cycle - 45 50 55 % tr, tf Rise and fall times 10% - 90% square wave - - 15 * VPP ns φn(HSE) Phase noise for 32 MHz Offset = 10 kHz - - -127 dBc/Hz Offset = 100 kHz - - -135 Offset = 1 MHz - - -138 1. Guaranteed by design. 2. Refer to the standard specification: 50 ppm for BLE, 40 ppm for 802.15.4 and when both BLE and 802.15.4 are used. 3. Only AC coupled is supported (capacitor 470 pF to 100 nF). |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
