All inputs of the C16x family have Schmitt-Trigger input characteristics. These Schmitt-Triggers are intended to always provide proper internal low and high levels, even if anundefined voltage level (between TTL-VIL and TTL-VIH) is externally applied to the pin.The hysteresis of these inputs, however, is very small, and can not be properly used in anapplication to suppress signal noise, and to shape slow rising/falling input transitions.Thus, it must be taken care that rising/falling input signals pass the undefined area of theTTL-specification between VIL and VIH with a sufficient rise/fall time, as generally usualand specified for TTL components (e.g. 74LS series: gates 1V/us, clock inputs 20v/us).The effect of the implemented Schmitt-Trigger is that even if the input signal remains inthe undefined area, well defined low/high levels are generated internally. Note that allinput signals are evaluated at specific sample points (depending on the input and theperipheral function connected to it), at that signal transitions are detected if twoconsecutive samples show different levels. Thus, only the current level of an input signalat these sample points is relevant, that means, the necessary rise/fall times of the inputsignal is only dependant on the sample rate, that is the distance in time between twoconsecutive evaluation time points. If an input signal, for instance, is sampled throughsoftware every 10us, it is irrelevant, which input level would be seen between thesamples. Thus, it would be allowable for the signal to take 10us to pass through theundefined area. Due to the sample rate of 10us, it is assured that only one sample canoccur while the signal is within the undefined area, and no incorrect transition will bedetected. For inputs which are connected to a peripheral function, e.g. capture inputs, thesample rate is determined by the clock cycle of the peripheral unit. In the case of theCAPCOM unit this means a sample rate of 400ns @ 20MHz CPU clock. This requiresinput signals to pass through the undefined area within these 400ns in order to avoidmultiple capture events.
上传时间: 2014-04-02
上传用户:han_zh
240x128 graphic mode/Driver ic:t6963C writed by hawk liu 2001 Aug. 22 1/128 duty 1/12.3 bias Vop=20v STN GRAY Trasflective mode character/Graphic mode demo program
标签: 240x128 graphic Driver t6963C
上传时间: 2014-01-13
上传用户:lacsx
用AVR单片机设计的MP3播放器 功能: MP3 Player IDE ATA interface FAT 32 with long file name support USB interface On board power supply (input from 7v to 20v DC) Bootloader firmware upgradeable via USB port Infrared bi-directional interface Remote Control Back light graphic LCD worked with only 2x AA batteries In sleep mode sink less than 1uA (2.5mA in active mode) 5 buttons for easy navigation Long range (more than 20 feets)
标签: MP3 interface support Player
上传时间: 2016-07-02
上传用户:fandeshun
MCP73831 是一款高级线性充电管理控制器,它适用于 空间小而对成本敏感的应用场合。MCP73831 提供 8 引 脚2 mm x 3 mm DFN 和5 引脚SOT23 两种封装形式。 由于体积小且外接元件少,MCP73831 非常适用于便携 式设备。MCP73831 也可用于USB 充电设备,它符合 主流USB 总线电源的所有规范。 MCP73831 采用恒流/ 恒压充电算法,并提供预充选项 和充电结束控制选项。恒压充电调节有四个选择: 4.20v、4.35V、 4.40V 和4.50V,这可以适应最新涌现 出来的电池充电要求。恒流充电电流由一个外部电阻设 定。在高功率或高温的外界环境下, MCP73831 将根据 管芯温度对充电电流大小进行限制。热调节功能对充电 周期进行优化,并维持器件的可靠性。
上传时间: 2016-09-26
上传用户:myworkpost
用C实现数字电压电流表:1、由外部输入直流电压电流,电压范围20v,电流范围1A; 2、电压/电流通过开关切换; 3、显示:数码管显示电压值/电流值,精度0.01。
上传时间: 2013-12-27
上传用户:zl5712176
TA8211是日本东芝半导体公司早期出品的一款双通道音频功率放大器,其具备6w x 2 输出功率,典型工作电源电压20v;适用于彩色电视机,收录机功率放大器和家庭音响等应用场合。TA8211采用单排12引脚直插封装工艺。
上传时间: 2021-07-01
上传用户:xiangshuai
Wide 2.2V to 6V Input Voltage Range 0.20v FB adjustable LED drive current Directly drive 9 Series 1W LED at VIN>=6V Fixed 800KHz Switching Frequency Max. 3A Switching Current Capability Up to 92% efficiency Excellent line and load regulation EN PIN TTL shutdown capability Internal Optimize Power MOSFET
标签: sc3633
上传时间: 2021-11-05
上传用户:d1997wayne
SM5401 是一款集成锂电池充电管理,LED 指示功能,升压转换器的移动电源管理芯片,外围只需极少的元件,就可以组成性能完备的移动电源方案。SM5401 内部集成了 0.8A 的线性充电模式,支持对 0V 电池充电;具有涓流/恒流/恒压三种模式充电,恒定电压 4.20v(典型值);内置 IC 温度和输入电压智能调节充电电流;SM5401 内部采用了 PMOSFET 架构,加上防倒充电路,因此可以不需要外部检查电阻和隔离二极管。SM5401 的同步升压转换器提供 0.8A 输出电流,转换效率高至 91%。空载时,自动进入休眠状态,静态电流降至 9uA。
上传时间: 2022-02-10
上传用户:aben
LT3095MPUDD双通道低噪声偏置发生器的典型应用电路凌力尔特公司 (Linear Technology Corporation) 推出双通道 IC LT3095,该器件从单一输入提供两路非常低噪声、低纹波的偏置电源。每个通道都纳入了单片升压型 DC/DC 转换器,一个集成的超低噪声和高 PSRR (电源抑制比) 线性稳压器对该转换器进行了后置稳压。LT3095 在输出电压高达 20v 时提供高达 50mA 的连续输出电流,总纹波和噪声 <100µVP-P。该器件在 3V 至 20v 输入电压范围内工作,从而可与多种电源兼容。 LT3095 的固定频率、峰值电流模式升压型 DC/DC 转换器包括一个集成的 950mA 电源开关、肖特基二极管和内部频率补偿。开关频率在 450kHz 至 2MHz 内可通过单个电阻器编程,或可同步至一个外部时钟,因此允许使用纤巧的外部组件。结合紧凑的 3mm x 5mm QFN 封装,LT3095 可提供简单、占板面积紧凑、高效率的解决方案,适用于仪表放大器、RF 和数据转换系统、以及其他低噪声偏置应用。 LT3095 的线性稳压器运用凌力尔特专有的电流源基准架构,从而提供了很多优势,例如能够用单个电阻器设定输出电压,带宽、噪声、PSRR 和负载调节性能基本上不受输出电压影响。集成输出噪声 (在 10Hz 至 100kHz 带宽) 仅为 4µVRMS,而且在整个开关频率范围内 PSRR 超过70dB,从而使总的噪声和纹波 <100µVP-P。线性稳压器调节升压型转换器的输出电压,使其比线性稳压器输出电压高 2V,从而优化了功耗、瞬态响应和 PSRR 性能。为了提高系统可靠性,LT3095 提供短路和热保护,还为每个通道提供独立和精确的使能 / UVLO 门限。微功率工作时,两个 EN 引脚均被拉低。
标签: 噪声偏置发生器
上传时间: 2022-02-15
上传用户:
IP2716是一款集成USB TYPE-C输入输出协议、USB Power Delivery(PD3.0)输入输出协议、QC3.0/2.0输出快充协议(兼容DCP识别功能,兼容BC1.2、苹果和三星手机)等多功能。高集成度与丰富功能,使其在应用时仅需极少的外围器件。如果原有的普通方案输出功率和输出电压范围满足需求,只需额外增加外扩的功率MOS就可以实现在原有方案的基础上升级为支持TYPE-C、PD3.0、QC3.0/2.0的高级快充方案。适当提升DC-DC或AC-DC元件性能,可以轻松实现最高100W(20v 5A)输出能力,为移动电源、适配器、车充提供完整的TYPE-C解决方案。
标签: ip2716
上传时间: 2022-04-09
上传用户: