![]() |
Electronic Components Datasheet Search |
|
STA8089FG Datasheet(PDF) 26 Page - STMicroelectronics |
|
|
STA8089FG Datasheet(HTML) 26 Page - STMicroelectronics |
26 / 34 page ![]() Electrical characteristics STA8089FG 26/34 DocID027175 Rev 8 4.8.2 Oscillator electrical specifications This device contains two oscillators: a 32.768 kHz oscillator/buffer for RTC circuit. an OSCI oscillator/buffer in the RF Front-End When used in oscillator mode, each oscillator requires a specific crystal, with parameters that must be as close as possible to the following recommended values. When used in input buffer mode, an external clock source must be applied. 32.768 kHz OSCI32 oscillator specifications The 32.768 kHz OSCI32 oscillator is connected between RTC_XTI (oscillator amplifier input) and RTC_XTO (oscillator amplifier output). It also requires two external capacitors of 18 pF(b), as shown on Figure 4. OSCI32 is disabled by default and must be enabled by setting bit28-OSCI_EN of PRCC_BACKUP_REG0 to have 32.768KHz oscillation when an XTAL pi-network is connected to RTC_XTI/RTC_XTO pins. The recommended oscillator specifications are shown in Table 21: The oscillator amplifier specifications are shown in the following table: b. Using crystal with recommended characteristics as per Table 21. Table 21. Crystal recommended specifications Symbol Parameter Min. Typ. Max. Unit FSXTAL Crystal frequency(1) 1. Not tested in production. — 32.768 — kHz LMSXTAL Motion inductance(1) —5 — kH CMSXTAL Motional capacitance(1) —5.0 — fF COSXTAL Shunt capacitance(1) —1.3 — pF ESR Resonance resistance(1) —— 80 kΩ CL External load capacitance(1) —18 — pF Table 22. Oscillator amplifier specifications Symbol Parameter Min. Typ. Max. Unit TS Startup time(1) 1. Not tested in production. —0.3 0.6 s DL Drive level(1) —— <0.1 µW RLC Required load capacitance(1) — 12.5 — pF GM Startup transconductance 22.5 33.6 — µA/V |
Similar Part No. - STA8089FG |
|
Similar Description - STA8089FG |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | 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 |