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用RS-485能夠傳多快？傳多遠(yuǎn)？
摘要：工業(yè)數(shù)據(jù)通訊系統(tǒng)設(shè)計(jì)常常面臨這樣的疑問：在多點(diǎn)、中等速率、串行數(shù)據(jù)通訊中，成本最低的方案是什么？能夠獲得的最高傳輸速率是多大，傳輸?shù)木嚯x有多遠(yuǎn)？如何實(shí)現(xiàn)...
2009-04-24 標(biāo)簽：RS-485 6635
串行數(shù)據(jù)接口芯片供應(yīng)雙極電壓-Serial-Data Int
Some of the interface ICs currently available for serial-data transmission not only operate from low VCC levels (5V or 3.3V); they also generate bipolar dc voltages (±6.5V to ±10V) to support the minimum driver-output levels as specified...
2009-04-24 標(biāo)簽：芯片數(shù)據(jù)接口 1305
RS-232接口功能的解釋-RS-232 Features
Abstract: RS-232 features are explained in a way that makes it easy to select an appropriate RS-232 communication IC to meet any system need. Special attention is given to, signal swings, slew rates, enhanced ESD protection as well as data...
2009-04-24 標(biāo)簽：RS-232 4181
RS - 232串行通信-Fundamentals of R
Abstract: Due to its relative simplicity and low hardware overhead (when compared to parallel interfacing), serial communications is used extensively within the electronics industry. Today, the most popular serial communications standard i...
ESD Considerations for RS-232
Abstract: Technical brief suggests ESD protection schemes for RS-232 transceivers. Basic diode clamps, TransZorb™, and zener diodes are considered. Internal latch-up is explained. Protection of vulnerable CMOS devic...
2009-04-24 標(biāo)簽：RS-232 3074
Design Considerations for Data
Abstract: The requirements for interconnect between computers, cell phones or PDA devices are examined as related to the use of data-lump cables. Consideration is given to channel count, supply limitations, RS-232 compatibility or complian...
2009-04-24 標(biāo)簽：design 1198
時(shí)鐘精度要求確定的異步通信-Determining Cloc
Abstract: This application note discusses the timing requirements for the commonly used serial asynchronous communications protocol implemented in UARTs, and shows how to determine the tolerance for the UART clock source at both ends of an...
2009-04-24 標(biāo)簽：異步通信 1844
外圍設(shè)備的SPI接口的MAX7651處理器-Interfac
Abstract: This article explains how to interface a GPIO port to an SPI peripheral. It defines the basics of the SPI protocol, the signals and the four transfer variations for the SCK signal. A software routine is included to implement the ...
2009-04-24 標(biāo)簽：處理器 1009
Force/Sense DAC Applications
Abstract: This article discusses application circuits for Maxim force/sense digital-to-analog converters (DACs). Applications include: selectable fixed-gain DAC, programmable gain DAC, photodiode bias control, amperometric sensor control, ...
2009-04-24 標(biāo)簽：dac 705
Two ICs Convert 4-20mA Signal
Abstract: This design idea describes a simple circuit that converts a 4-20mA signal to a 0V to 5V analog voltage ideal for conversion to digital with an analog-to-digital converter (ADC). The 4mA level from the transducer produces a 0V out...
2009-04-24 標(biāo)簽：signal 1043
通過低電壓差分信號(hào)(LVDS)傳輸高速信號(hào)
摘要：ANSI EIA/TIA-644標(biāo)準(zhǔn)定義的低電壓差分信號(hào)(LVDS)非常適合包括時(shí)鐘分配、點(diǎn)對(duì)點(diǎn)以及多點(diǎn)之間的信號(hào)傳輸。本文描述了使用LVDS將高速通訊信號(hào)分配到多個(gè)目的端的方法。 ...
2009-04-24 標(biāo)簽：lvds 2087
LVDS分離器簡(jiǎn)化高速信號(hào)分配
摘要：與ECL、PECL和CML標(biāo)準(zhǔn)相比，ANSI EIA/TAI-644的低電壓差分信號(hào)(LVDS)標(biāo)準(zhǔn)具有低功耗、低噪聲輻射等優(yōu)勢(shì)。本文主要討論LVDS的特性及其可能的應(yīng)用。 最近幾年，隨著微...
接口1DS18683線設(shè)備到一個(gè)SPI總線-Interfac
Abstract: The DS1868 uses a dual digital potentiometer with a 3-wire (shift register) interface. This application note describes the logic and firmware required to interface the DS1868, as well as any other Dallas Semiconductor 3-wire devi...
2009-04-24 標(biāo)簽：DS18683 796
模擬開關(guān)擴(kuò)展I2C接口-Analog Switch Expa
Abstract: Design idea outlining how to use an I2C-controlled analog switch to triple the number of devices connected to an I2C bus. Perhaps the most effective way to gain board space and increase component density is to m...
2009-04-24 標(biāo)簽：接口模擬開關(guān) 2322
LVDS促進(jìn)3G基站的高速信號(hào)傳送
摘要：本文討論EIA/TIA-644低壓差分信號(hào)(LVDS)標(biāo)準(zhǔn)在3G移動(dòng)通信設(shè)備中的應(yīng)用，LVDS具有低功耗、低輻射等優(yōu)勢(shì)，可理想用于W-CDMA、EDGE和CDMA2000中的高速時(shí)鐘、數(shù)據(jù)傳輸。 3G...
2009-04-24 標(biāo)簽：信號(hào) 738
啟用復(fù)用器Pseudomultidrop RS-232接口傳
Abstract: A circuit is described that allows four remote RS-232 transceivers to share a single UART. A dual four-to-one multiplexer permits transceiver IC1 to form a network with the four remote transceivers. RS-232 commu...
2009-04-24 標(biāo)簽：接口 1043
SCSI Bus Configuration For MST
OverviewIn a typical application the SCSI devices are daisy-chained as shown in Figure 1. The DIFFCAP signal monitors the DIFFSENS line to determine the proper operating mode of the device. The DIFFSENSE pin can also drive the SCS...
2009-04-24 標(biāo)簽：bus 1271
傳輸數(shù)字信號(hào)和權(quán)力相同電線-Transmit Digital
Abstract: Analog switches can be used to enable the transmission of digital signals and power over the same two wires. The signal waveform is rectified at the remote location to provide a stable supply voltage and modest load current (abou...
2009-04-24 標(biāo)簽： 589
Connecting the DS2119M SCSI Te
Abstract: SCSI terminators are used to match the termination impedance at each end of a SCSI bus. Matching the impedance is important to maximize the data transfer rate by reducing ringing and cross-talk between cable pairs. ...
2009-04-24 標(biāo)簽：DS2119M 1070
The Advantages of Using Low-Vo
The choice of SCSI (Small Computer System Interface) transceivers, whether single-ended (SE) or differential (HVD or LVD), determines the speed of data transfers, the length of cable, and the number of devices that can be supported by a ho...
2009-04-24 標(biāo)簽：LVD 1604
用PC機(jī)測(cè)試MAX7300/MAX7301的端口擴(kuò)展功能
摘要：該應(yīng)用筆記介紹了一個(gè)可以免費(fèi)下載的PC程序，用于評(píng)估MAX7300和MAX7301 GPIO (擴(kuò)展口)的功能。 MAX7300和MAX7301是通用的28端口、通用輸入/輸出口(GPIO)處理器外設(shè)。通...
2009-04-24 標(biāo)簽：端口 1813
Add Fault Protection to 4-20mA
Abstract: This circuit provides flexible fault protection for a 4-20mA current loop. In addition, it includes circuitry for recovering digital signals (such as the HART protocol) imposed on the loop. 4-20mA current loops ...
2009-04-24 標(biāo)簽：circuit 1509
A Match Made in Silicon
Abstract: IrDA is a standardized, wireless, infrared data communications method. Modern products often support RS-232 alongside IrDA, meeting legacy requirements. This application note describes ways to achieve both interfaces with a singl...
DS2120低壓差分(LVD)器件在SCSI應(yīng)用環(huán)境中的優(yōu)勢(shì)
摘要：本文描述了SCSI、FAST SCSI和ULTRA SCSI之間的差別，給出了DS2120 SCSI端接器的連接方式以及所需要的電平。本文還討論了DIFF_CAP、DIFFSENS相關(guān)的MSTR/SLV功能。 另請(qǐng)參考: S...
2009-04-24 標(biāo)簽：DS2120 1543
Level Translators For SPI and
Abstract: A serial interface is often used for board-level communication between different integrated circuits, especially in space-constrained applications at low-to medium data-rates. The most popular serial interfaces are I²C and S...
2009-04-24 標(biāo)簽：bus 1593
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