- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358883 > LMS485 (National Semiconductor Corporation) 5V Low Power RS-485 / RS-422 Differential Bus PDF資料下載
參數(shù)資料
| 型號： | LMS485 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 5V Low Power RS-485 / RS-422 Differential Bus |
| 中文描述： | 5V的低功耗RS - 485 / RS - 422差分總線 |
| 文件頁數(shù)： | 11/13頁 |
| 文件大?。?/td> | 249K |
| 代理商： | LMS485 |
Application Information
POWER LINE NOISE FILTERING
A factor to consider in designing power and ground is noise
filtering. A noise filtering circuit is designed to prevent noise
generated by the integrated circuit (IC) as well as noise
entering the IC from other devices. A common filtering
method is to place by-pass capacitors (C
bp
) between the
power and ground lines.
Placing a by-pass capacitor (C
bp
) with the correct value at
the proper location solves many power supply noise prob-
lems. Choosing the correct capacitor value is based upon
the desired noise filtering range. Since capacitors are not
ideal, they may act more like inductors or resistors over a
specific frequency range. Thus, many times two by-pass
capacitors may be used to filter a wider bandwidth of noise.
It is highly recommended to place a larger capacitor, such as
10μF, between the power supply pin and ground to filter out
low frequencies and a 0.1μF to filter out high frequencies.
By-pass capacitors must be mounted as close as possible to
the IC to be effective. Long leads produce higher impedance
at higher frequencies due to stray inductance. Thus, this will
reduce the by-pass capacitor’s effectiveness. Surface
mounted chip capacitors are the best solution because they
have lower inductance.
20062622
FIGURE 11. Placement of by-pass Capacitors, C
bp
L
www.national.com
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LMS485IM | 5V Low Power RS-485 / RS-422 Differential Bus |
| LMS485IMX | 5V Low Power RS-485 / RS-422 Differential Bus |
| LMS485CM | RESISTOR |
| LMS485CMX | 5V Low Power RS-485 / RS-422 Differential Bus |
| LMS485CNA | 5V Low Power RS-485 / RS-422 Differential Bus |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMS485CM | 制造商:Texas Instruments 功能描述:IC BUS TRANSCEIVER SOIC8 5V 485 制造商:Texas Instruments 功能描述:IC, BUS TRANSCEIVER, SOIC8, 5V, 485 |
| LMS485CM | 制造商:Texas Instruments 功能描述:IC BUS TRANSCEIVER SOIC8 5V 485 |
| LMS485CM/NOPB | 功能描述:TXRX 5V RS422/485 DIFF BUS 8SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:25 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:16-PDIP 包裝:管件 |
| LMS485CMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:5V Low Power RS-485 / RS-422 Differential Bus |
| LMS485CMX/NOPB | 功能描述:TXRX 5V RS422/485 DIFF BUS 8SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:25 系列:- 類型:收發(fā)器 驅(qū)動器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:4.5 V ~ 5.5 V 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:16-PDIP 包裝:管件 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。