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.
標(biāo)簽: C16x 微控制器 輸入信號(hào) 時(shí)序圖
上傳時(shí)間: 2014-04-02
上傳用戶: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
標(biāo)簽: 240x128 graphic Driver t6963C
上傳時(shí)間: 2014-01-13
上傳用戶:lacsx
用AVR單片機(jī)設(shè)計(jì)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)
標(biāo)簽: MP3 interface support Player
上傳時(shí)間: 2016-07-02
上傳用戶:fandeshun
MCP73831 是一款高級(jí)線性充電管理控制器,它適用于 空間小而對成本敏感的應(yīng)用場合。MCP73831 提供 8 引 腳2 mm x 3 mm DFN 和5 引腳SOT23 兩種封裝形式。 由于體積小且外接元件少,MCP73831 非常適用于便攜 式設(shè)備。MCP73831 也可用于USB 充電設(shè)備,它符合 主流USB 總線電源的所有規(guī)范。 MCP73831 采用恒流/ 恒壓充電算法,并提供預(yù)充選項(xiàng) 和充電結(jié)束控制選項(xiàng)。恒壓充電調(diào)節(jié)有四個(gè)選擇: 4.20V、4.35V、 4.40V 和4.50V,這可以適應(yīng)最新涌現(xiàn) 出來的電池充電要求。恒流充電電流由一個(gè)外部電阻設(shè) 定。在高功率或高溫的外界環(huán)境下, MCP73831 將根據(jù) 管芯溫度對充電電流大小進(jìn)行限制。熱調(diào)節(jié)功能對充電 周期進(jìn)行優(yōu)化,并維持器件的可靠性。
上傳時(shí)間: 2016-09-26
上傳用戶:myworkpost
用C實(shí)現(xiàn)數(shù)字電壓電流表:1、由外部輸入直流電壓電流,電壓范圍20V,電流范圍1A; 2、電壓/電流通過開關(guān)切換; 3、顯示:數(shù)碼管顯示電壓值/電流值,精度0.01。
上傳時(shí)間: 2013-12-27
上傳用戶:zl5712176
TA8211是日本東芝半導(dǎo)體公司早期出品的一款雙通道音頻功率放大器,其具備6w x 2 輸出功率,典型工作電源電壓20V;適用于彩色電視機(jī),收錄機(jī)功率放大器和家庭音響等應(yīng)用場合。TA8211采用單排12引腳直插封裝工藝。
上傳時(shí)間: 2021-07-01
上傳用戶: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
標(biāo)簽: sc3633
上傳時(shí)間: 2021-11-05
上傳用戶:d1997wayne
SM5401 是一款集成鋰電池充電管理,LED 指示功能,升壓轉(zhuǎn)換器的移動(dòng)電源管理芯片,外圍只需極少的元件,就可以組成性能完備的移動(dòng)電源方案。SM5401 內(nèi)部集成了 0.8A 的線性充電模式,支持對 0V 電池充電;具有涓流/恒流/恒壓三種模式充電,恒定電壓 4.20V(典型值);內(nèi)置 IC 溫度和輸入電壓智能調(diào)節(jié)充電電流;SM5401 內(nèi)部采用了 PMOSFET 架構(gòu),加上防倒充電路,因此可以不需要外部檢查電阻和隔離二極管。SM5401 的同步升壓轉(zhuǎn)換器提供 0.8A 輸出電流,轉(zhuǎn)換效率高至 91%。空載時(shí),自動(dòng)進(jìn)入休眠狀態(tài),靜態(tài)電流降至 9uA。
標(biāo)簽: sm5401 移動(dòng)電源
上傳時(shí)間: 2022-02-10
上傳用戶:aben
LT3095MPUDD雙通道低噪聲偏置發(fā)生器的典型應(yīng)用電路凌力爾特公司 (Linear Technology Corporation) 推出雙通道 IC LT3095,該器件從單一輸入提供兩路非常低噪聲、低紋波的偏置電源。每個(gè)通道都納入了單片升壓型 DC/DC 轉(zhuǎn)換器,一個(gè)集成的超低噪聲和高 PSRR (電源抑制比) 線性穩(wěn)壓器對該轉(zhuǎn)換器進(jìn)行了后置穩(wěn)壓。LT3095 在輸出電壓高達(dá) 20V 時(shí)提供高達(dá) 50mA 的連續(xù)輸出電流,總紋波和噪聲 <100μVP-P。該器件在 3V 至 20V 輸入電壓范圍內(nèi)工作,從而可與多種電源兼容。 LT3095 的固定頻率、峰值電流模式升壓型 DC/DC 轉(zhuǎn)換器包括一個(gè)集成的 950mA 電源開關(guān)、肖特基二極管和內(nèi)部頻率補(bǔ)償。開關(guān)頻率在 450kHz 至 2MHz 內(nèi)可通過單個(gè)電阻器編程,或可同步至一個(gè)外部時(shí)鐘,因此允許使用纖巧的外部組件。結(jié)合緊湊的 3mm x 5mm QFN 封裝,LT3095 可提供簡單、占板面積緊湊、高效率的解決方案,適用于儀表放大器、RF 和數(shù)據(jù)轉(zhuǎn)換系統(tǒng)、以及其他低噪聲偏置應(yīng)用。 LT3095 的線性穩(wěn)壓器運(yùn)用凌力爾特專有的電流源基準(zhǔn)架構(gòu),從而提供了很多優(yōu)勢,例如能夠用單個(gè)電阻器設(shè)定輸出電壓,帶寬、噪聲、PSRR 和負(fù)載調(diào)節(jié)性能基本上不受輸出電壓影響。集成輸出噪聲 (在 10Hz 至 100kHz 帶寬) 僅為 4μVRMS,而且在整個(gè)開關(guān)頻率范圍內(nèi) PSRR 超過70dB,從而使總的噪聲和紋波 <100μVP-P。線性穩(wěn)壓器調(diào)節(jié)升壓型轉(zhuǎn)換器的輸出電壓,使其比線性穩(wěn)壓器輸出電壓高 2V,從而優(yōu)化了功耗、瞬態(tài)響應(yīng)和 PSRR 性能。為了提高系統(tǒng)可靠性,LT3095 提供短路和熱保護(hù),還為每個(gè)通道提供獨(dú)立和精確的使能 / UVLO 門限。微功率工作時(shí),兩個(gè) EN 引腳均被拉低。
標(biāo)簽: 噪聲偏置發(fā)生器
上傳時(shí)間: 2022-02-15
上傳用戶:
IP2716是一款集成USB TYPE-C輸入輸出協(xié)議、USB Power Delivery(PD3.0)輸入輸出協(xié)議、QC3.0/2.0輸出快充協(xié)議(兼容DCP識(shí)別功能,兼容BC1.2、蘋果和三星手機(jī))等多功能。高集成度與豐富功能,使其在應(yīng)用時(shí)僅需極少的外圍器件。如果原有的普通方案輸出功率和輸出電壓范圍滿足需求,只需額外增加外擴(kuò)的功率MOS就可以實(shí)現(xiàn)在原有方案的基礎(chǔ)上升級(jí)為支持TYPE-C、PD3.0、QC3.0/2.0的高級(jí)快充方案。適當(dāng)提升DC-DC或AC-DC元件性能,可以輕松實(shí)現(xiàn)最高100W(20V 5A)輸出能力,為移動(dòng)電源、適配器、車充提供完整的TYPE-C解決方案。
標(biāo)簽: ip2716
上傳時(shí)間: 2022-04-09
上傳用戶:
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