Moteur de recherche de fiches techniques de composants électroniques |
|
BCM20705 Fiches technique(PDF) 38 Page - Cypress Semiconductor |
|
BCM20705 Fiches technique(HTML) 38 Page - Cypress Semiconductor |
38 / 67 page Crystal Oscillator BCM20705 Data Sheet BROADCOM CONFIDENTIAL Broadcom® Bluetooth Transceiver and Baseband Processor November 13, 2014 • MCS20705-DS104-R Page 37 Crystal Oscillator The BCM20705 can use an external crystal to provide a frequency reference. The recommended configuration for the crystal oscillator, including all external components, is shown in Figure 7. Figure 7: Recommended Oscillator Configuration External Frequency Reference An external frequency reference, such as VDD_RF, collectively refers to several RF power supplies generated by a TCXO signal that may be directly connected to the crystal input pin on the BCM20705, as shown in Figure 8. The external frequency reference input is designed to not change loading on the TCXO when the BCM20705 is powered up or powered down. When using the BCM20705 with the TXCO OR gate option, GPIO 6 must be driven active high or active low. Excessive leakage current results if GPIO6 is allowed to float. Figure 8: Recommended TCXO Connection 0 ~18 pF* 0 ~18 pF* XIN XOUT Crystal Oscillator *Capacitor value range depends on the manufacturer of the XTAL as well as board layout. No Connection TCXO XIN XOUT 10–1000 pF* * Recommended value is 100 pF. Higher values produce a longer startup time. Lower values have greater isolation. Larger values help small signal swings. |
Numéro de pièce similaire - BCM20705 |
|
Description similaire - BCM20705 |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |