參數(shù)資料
型號: ST72774S9T1/XXX
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
封裝: TQFP-44
文件頁數(shù): 56/144頁
文件大?。?/td> 1280K
代理商: ST72774S9T1/XXX
ST72774/ST727754/ST72734
19/144
CLOCK SYSTEM (Cont’d)
3.1.2 Crystal Resonator
The internal oscillator is designed to operate with
an
AT-cut
parallel
resonant
quartz
crystal
resonator in the frequency range specified for fosc.
The circuit shown in Figure 8 is recommended
when
using
a
crystal,
and
Table 4,
“.
Recommended Crystal Values,” on page 19 lists
the recommended capacitance and feedback
resistance values. The crystal and associated
components should be mounted as close as
possible to the input pins in order to minimize
output distortion and start-up stabilization time.
Figure 8. Crystal/Ceramic Resonator
Table 4
. Recommended Crystal Values
Legend:
CL1, CL2 = Maximum total capacitance on pins
OSCIN and OSCOUT (the value includes the
external capacitance tied to the pin plus the
parasitic capacitance of the board and of the
device).
RSMAX = Maximum series parasitic resistance of
the quartz allowed.
Note: The tables are relative to the quartz crystal
only (not ceramic resonator).
3.1.3 External Clock
An external clock should be applied to the OSCIN
input with the OSCOUT pin not connected as
shown in Figure 9. The Crystal clock specifications
do not apply when using an external clock input.
The equivalent specification of the external clock
source should be used.
Figure 9. External Clock Source Connections
OSCIN
OSCOUT
CL1
CL2
CRYSTAL CLOCK
1M*
*Recommended for oscillator stability
24 Mhz
Unit
RSMAX
70
25
20
Ohms
CL1
22
47
56
pf
CL2
22
47
56
pf
OSCIN
OSCOUT
EXTERNAL
CLOCK
NC
相關(guān)PDF資料
PDF描述
ST72E734J6D0 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP42
ST72T774S9T1 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP44
ST7294C6B6 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP28
ST72T94C6M6 8-BIT, OTPROM, MICROCONTROLLER, PDSO28
ST72C171K2B6 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST727X4-EMU2B 制造商:STMicroelectronics 功能描述:REALTIME EMULATOR BOARD - Bulk
ST727X4-EPB/US 制造商:STMicroelectronics 功能描述:PROGRAMMER - Bulk
ST-7-28 功能描述:XFRMR PWR 115V 14VAC 2.6A RoHS:是 類別:變壓器 >> 功率 系列:ST 標(biāo)準(zhǔn)包裝:1 系列:260 類型:標(biāo)準(zhǔn) 最大功率:65 VA 主線圈:雙 副線圈:三路,中心抽頭 在某電流時(shí)的串聯(lián)輸出電壓:500 VAC @ 85mA,5 VAC @ 2A,6.3 VAC @ 2A 在某電流時(shí)的并聯(lián)輸出電壓:- 安裝類型:底座安裝 尺寸/尺寸:102.36mm L x 67.31mm W 高度 - 座高(最大):66.80mm 端接類型:導(dǎo)線引線
ST7-28 制造商:SUPERWORLD 制造商全稱:Superworld Electronics 功能描述:POWER TRANSFORMER
ST7-28B56 功能描述:電源變壓器 SPLIT BOBBIN HORZ MOUNT XFMR RoHS:否 制造商:Triad Magnetics 功率額定值:12 VA 初級電壓額定值:115 V / 230 V 次級電壓額定值:12 V / 24 V 安裝風(fēng)格:SMD/SMT 一次繞組:Dual Primary Winding 二次繞組:Dual Secondary Winding 長度:2.5 in 寬度:2 in 高度:1.062 in