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ESD Considerations for RS-232

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 标签:RS-232 1383

Design Considerations for Data

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 标签:Design 374

New RS-232 ICs Feature 1µ

New RS-232 ICs Feature 1µ

New RS-232...

2009-04-24 标签:RS-232 282

Lower the Supply Current in Yo

Lower the Supply Current in Yo

Lower the ...

2009-04-24 标签:RS-232 582

时钟精度要求确定的异步通信-Determining Cloc

时钟精度要求确定的异步通信-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 标签:异步通信 694

New IC Caps Two Decades of UAR

New IC Caps Two Decades of UAR

New IC Cap...

2009-04-24 标签:IC 503

外围设备的SPI接口的MAX7651处理器-Interfac

外围设备的SPI接口的MAX7651处理器-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 标签:处理器 348

Force/Sense DAC Applications

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 标签:DAC 280

Two ICs Convert 4-20mA Signal

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 标签:Signal 343

通过低电压差分信号(LVDS)传输高速信号

通过低电压差分信号(LVDS)传输高速信号

摘要:ANSI EIA/TIA-644标准定义的低电压差分信号(LVDS)非常适合包括时钟分配、点对点以及多点之间的信号传输。本文描述了使用LVDS将高速通讯信号分配到多个目的端的方法。 ...

2009-04-24 标签:LVDS 378

LVDS分离器简化高速信号分配

LVDS分离器简化高速信号分配

摘要:与ECL、PECL和CML标准相比,ANSI EIA/TAI-644的低电压差分信号(LVDS)标准具有低功耗、低噪声辐射等优势。本文主要讨论LVDS的特性及其可能的应用。 最近几年,随着微...

2009-04-24 标签:分离器LVDS 417

接口1DS18683线设备到一个SPI总线-Interfac

接口1DS18683线设备到一个SPI总线-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 标签:DS18683 245

模拟开关扩展I2C接口-Analog Switch Expa

模拟开关扩展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 标签:接口模拟开关 787

LVDS促进3G基站的高速信号传送

LVDS促进3G基站的高速信号传送

摘要:本文讨论EIA/TIA-644低压差分信号(LVDS)标准在3G移动通信设备中的应用,LVDS具有低功耗、低辐射等优势,可理想用于W-CDMA、EDGE和CDMA2000中的高速时钟、数据传输。 3G...

2009-04-24 标签:信号 278

Using a PC's RS-232 Serial

Using a PC's RS-232 Serial

Using a PC...

2009-04-24 标签:Port 741

Power Supply From 4-20mA Trans

Power Supply From 4-20mA Trans

Power Supp...

2009-04-24 标签:Line 613

启用复用器Pseudomultidrop RS-232接口传

启用复用器Pseudomultidrop RS-232接口传

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 标签:接口 248

SCSI Bus Configuration For MST

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 标签:Bus 422

传输数字信号和权力相同电线-Transmit Digital

传输数字信号和权力相同电线-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 标签: 178

Connecting the DS2119M SCSI Te

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 标签:DS2119M 315

The Advantages of Using Low-Vo

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 标签:LVD 434

用PC机测试MAX7300/MAX7301的端口扩展功能

用PC机测试MAX7300/MAX7301的端口扩展功能

摘要:该应用笔记介绍了一个可以免费下载的PC程序,用于评估MAX7300和MAX7301 GPIO (扩展口)的功能。 MAX7300和MAX7301是通用的28端口、通用输入/输出口(GPIO)处理器外设。通...

2009-04-24 标签:端口 605

Add Fault Protection to 4-20mA

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 标签:circuit 421

A Match Made in Silicon

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...

2009-04-24 标签:IrDAand 861

DS2120低压差分(LVD)器件在SCSI应用环境中的优势

DS2120低压差分(LVD)器件在SCSI应用环境中的优势

摘要:本文描述了SCSI、FAST SCSI和ULTRA SCSI之间的差别,给出了DS2120 SCSI端接器的连接方式以及所需要的电平。本文还讨论了DIFF_CAP、DIFFSENS相关的MSTR/SLV功能。 另请参考: S...

2009-04-24 标签:DS2120 362

Level Translators For SPI and

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 标签:Bus 536

LVDS串行-解串器在双绞线电缆数据传输中的性能分析

LVDS串行-解串器在双绞线电缆数据传输中的性能分析

利用串行-解串器能够大大减少近距离、宽带数据通信中的连线,类似的应用有电信和网络设备的背板互连、3G蜂窝电话基站中机架内部的互连、数字视频接口等。电流模式、低电压...

2009-04-24 标签:串行双绞线 619

了解共模信号-Understanding Common-Mo

了解共模信号-Understanding Common-Mo

Abstract: To understand how common-mode signals are created and then suppressed, you should first understand the interaction of shields and grounds in common cable configurations. The following discussion defines a common-mode signal, revi...

2009-04-24 标签:信号 390

新增的Windows NT/2000/XP支持AN3315并

新增的Windows NT/2000/XP支持AN3315并

Abstract: This application note is a supplement to two previous application notes, which effectively extend the usage of the parallel-port, 2-wire hardware (presented in AN3230) and software (presented in AN3315) to computers operating on ...

2009-04-24 标签:端口 356

可控制多外设的SPI/I²C总线

可控制多外设的SPI/I²C总线

摘要:本应用笔记对两种模拟IC中常用的串行、数字接口(SPI™或3线、I²C或2线)进行了比较,每种接口在不同的设计中都表现出其优点和缺点,具体取决于数据速率、可提供的...

2009-04-24 标签:总线 162

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