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參數(shù)資料
| 型號： | A5191HRTNG-XTP |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 2/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | MODEM HART SGL CMOS 32QFN |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 數(shù)據(jù)格式： | HART |
| 波特率： | 1.2k |
| 電源電壓： | 3 V ~ 5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 32-QFN（5x5） |
| 包裝： | 帶卷 (TR) |
A5191HRT
http://onsemi.com
10
Internal Oscillator Option
The oscillator cell will function with either a 460.8 kHz
crystal or ceramic resonator. A parallel resonant ceramic
resonator can be connected between XIN and XOUT.
Figure 12 illustrates the crystal option for clock generation
using a 460.8 kHz (
±1 % tolerance) parallel resonant crystal
and two tuning capacitors Cx. The actual values of the
capacitors may depend on the recommendations of the
manufacturer of the resonator. Typically, capacitors in the
range of 100 pF to 470 pF are used.
XOUT
XIN
CX
460.8 kHz
Crystal
Oscillator
Figure 12. Crystal Oscillator
External Clock Option
It may be desirable to use an external 460.8 kHz clock as
shown in Figure 13 rather than the internal oscillator. In
addition, the A5191HRT consumes less current when an
external clock is used. Minimum current consumption
occurs with the clock connected to XOUT and XIN
connected to VSS.
XOUT
XIN
Crystal
Oscillator
460.8 kHz
Figure 13. Oscillator with External Clock
Power On Reset
During start-up the RESETB pin should be kept low until
the voltage level on VDD is above the minimum level VDDH
= 2.5 V to guarantee correct operation of the digital circuitry.
As illustrated in Figure 14 RESETB should be kept low for
at least tPOR = 10 ns after this threshold level is reached.
tPOR =10 ns
VDDH =2.5 V
VDD
t
RESET pin
Figure 14. Power On Reset Timing
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A5191HRTPG | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:HART Modem |
| A5191HRTPG-XTD | 功能描述:電信線路管理 IC HART MODEM GREEN RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
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| A51A142761 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| A51ACG25X | 制造商:Panasonic Industrial Company 功能描述:CRT |
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