[{"data":1,"prerenderedAt":285},["ShallowReactive",2],{"component:ch340g:es":3},{"component":4,"localizationFallbackIssues":231,"related":232,"equivalentSlugs":284},{"schemaVersion":5,"governance":6,"id":18,"mpn":19,"slug":18,"primaryCategory":20,"manufacturers":21,"lifecycleStatus":23,"shortDescription":24,"deepTechnicalOverview":25,"packages":26,"absoluteMaximums":108,"recommendedOperating":113,"parametricAttributes":116,"gotchas":176,"datasheetUrl":17,"documentationSources":196,"applicationCircuits":204,"equivalents":205,"mountedOnBoards":216,"seo":222},"1.0.0",{"publication":7,"verification":10,"provenance":15},{"status":8,"publishedDate":9},"published","2026-10-11",{"status":11,"verifiedDate":9,"verifiedBy":12,"checklist":13},"verified","Serhii Shvab (owner sign-off of review pack batch 2, prepared by Claude against the cited datasheets)",{"schema":14,"technicalFacts":14,"relationships":14,"sources":14},true,{"sourceUrls":16},[17],"https:\u002F\u002Fwww.wch-ic.com\u002Fdownloads\u002FCH340DS1_PDF.html","ch340g","CH340G","interface_bridge",[22],"WCH (Jiangsu Qinheng)","active","Puente USB–UART en encapsulado SOP-16 con señales de módem y cristal externo de 12 MHz, habitual en placas económicas compatibles con Arduino y con ESP8266.","El CH340G es un puente USB 2.0 de velocidad completa a puerto serie de WCH. Ofrece TXD\u002FRXD y las señales de módem RTS#, DTR#, CTS#, DSR#, RI# y DCD#, admite velocidades de 50 bps a 2 Mbps y funciona con 5 V o 3,3 V. A diferencia de los CH340C\u002FN\u002FK\u002FE\u002FX\u002FB, necesita un cristal externo de 12 MHz. En el ordenador utiliza el controlador CH341 VCP de WCH. Los fabricantes de placas suelen controlar un circuito de reinicio automático con DTR# y RTS#. Los datos de esta página proceden de la hoja de datos CH340 de WCH, versión 3D.",[27],{"packageType":28,"pinCount":29,"bodyDimensionsMm":30,"pitchMm":34,"pins":35},"SOP-16",16,{"length":31,"width":32,"height":33},9.9,3.9,1.75,1.27,[36,42,48,53,58,62,66,71,76,80,84,88,92,96,100,105],{"pinNumber":37,"pinName":38,"electricalType":39,"isFiveVoltTolerant":14,"internalPull":40,"description":41},1,"GND","ground","none","Masa común, conectada directamente a la masa del USB",{"pinNumber":43,"pinName":44,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":47},2,"TXD","digital_io",false,"Salida de datos serie (transmisión); nivel alto en reposo",{"pinNumber":49,"pinName":50,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":51,"description":52},3,"RXD","programmable","Entrada de datos serie (recepción) con resistencias de pull-up y pull-down internas controlables; nivel alto en reposo",{"pinNumber":54,"pinName":55,"electricalType":56,"isFiveVoltTolerant":14,"internalPull":40,"description":57},4,"V3","power_in","Nodo interno de 3,3 V: 0,1 µF a GND cuando VCC es 5 V; unir a VCC cuando VCC es 3,3 V",{"pinNumber":59,"pinName":60,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":61},5,"UD+","USB D+; conectar directamente al bus USB sin resistencia en serie (el pull-up es interno)",{"pinNumber":63,"pinName":64,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":65},6,"UD-","USB D−; conectar directamente al bus USB sin resistencia en serie",{"pinNumber":67,"pinName":68,"electricalType":69,"isFiveVoltTolerant":46,"internalPull":40,"description":70},7,"XI","analog_in","Entrada del oscilador de cristal: cristal de 12 MHz con condensador de carga a GND",{"pinNumber":72,"pinName":73,"electricalType":74,"isFiveVoltTolerant":46,"internalPull":40,"description":75},8,"XO","analog_out","Salida del oscilador de cristal: cristal de 12 MHz con condensador de carga a GND",{"pinNumber":77,"pinName":78,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":79},9,"CTS#","Entrada de módem Clear To Send, activa a nivel bajo (la hoja de datos no indica pull-up interno)",{"pinNumber":81,"pinName":82,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":83},10,"DSR#","Entrada de módem Data Set Ready, activa a nivel bajo (la hoja de datos no indica pull-up interno)",{"pinNumber":85,"pinName":86,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":87},11,"RI#","Entrada de módem Ring Indicator, activa a nivel bajo (la hoja de datos no indica pull-up interno)",{"pinNumber":89,"pinName":90,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":91},12,"DCD#","Entrada de módem Data Carrier Detect, activa a nivel bajo (la hoja de datos no indica pull-up interno)",{"pinNumber":93,"pinName":94,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":95},13,"DTR#","Salida de módem Data Terminal Ready, activa a nivel bajo; suele controlar el reinicio automático del MCU. Antes de completar la configuración USB se lee como entrada (un pull-down de 4,7 kΩ solicita más corriente de alimentación)",{"pinNumber":97,"pinName":98,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":40,"description":99},14,"RTS#","Salida de módem Request To Send, activa a nivel bajo; suele controlar el circuito de arranque\u002Freinicio",{"pinNumber":101,"pinName":102,"electricalType":45,"isFiveVoltTolerant":46,"internalPull":103,"description":104},15,"R232","pulldown","Habilitación de RS232 auxiliar, activa a nivel alto, con pull-down interno; dejar sin conectar para un UART TTL",{"pinNumber":29,"pinName":106,"electricalType":56,"isFiveVoltTolerant":14,"internalPull":40,"description":107},"VCC","Alimentación: 4,0–5,3 V (modo 5 V) o 2,9–3,6 V con V3 unido a VCC; condensador de desacoplo de 0,1 µF",{"supplyVoltageMaxV":63,"operatingTempMinC":109,"operatingTempMaxC":110,"storageTempMinC":111,"storageTempMaxC":112},-40,85,-55,125,{"supplyVoltageMinV":114,"supplyVoltageTypV":59,"supplyVoltageMaxV":115},2.9,5.3,[117,122,128,135,141,147,153,159,163,170],{"symbol":118,"name":119,"typicalValue":59,"minValue":54,"maxValue":115,"unit":120,"testCondition":121},"VCC_5V","Tensión de alimentación, modo 5 V","V","V3 conectado solo a un condensador de 0,1 µF",{"symbol":123,"name":124,"typicalValue":125,"minValue":114,"maxValue":126,"unit":120,"testCondition":127},"VCC_3V3","Tensión de alimentación, modo 3,3 V",3.3,3.6,"V3 unido a VCC (CH340G)",{"symbol":129,"name":130,"typicalValue":131,"minValue":132,"maxValue":133,"unit":120,"testCondition":134},"VIO","Tensión en los pines","—",-0.5,"VCC + 0.5","Máximo absoluto; con 3,3 V las E\u002FS no toleran 5 V",{"symbol":136,"name":137,"typicalValue":67,"maxValue":138,"unit":139,"testCondition":140},"ICC","Corriente de alimentación",20,"mA","VCC = 5 V, en funcionamiento (4 \u002F 12 mA con 3,3 V)",{"symbol":142,"name":143,"typicalValue":144,"maxValue":145,"unit":139,"testCondition":146},"ISLP","Corriente en suspensión",0.09,0.2,"USB en suspensión, VCC = 5 V",{"symbol":148,"name":149,"typicalValue":150,"unit":151,"testCondition":152},"Baud","Velocidad de transmisión","50 bps – 2 Mbps","bps","Velocidades estándar hasta 2 000 000",{"symbol":154,"name":155,"typicalValue":156,"unit":157,"testCondition":158},"BaudErr","Error de velocidad de transmisión","\u003C 0.3","%","CH340G con cristal de 12 MHz; tolerancia en recepción de aproximadamente 2 %",{"symbol":160,"name":161,"typicalValue":162,"unit":160},"USB","Interfaz USB","2.0 Full-Speed",{"symbol":164,"name":165,"typicalValue":89,"minValue":166,"maxValue":167,"unit":168,"testCondition":169},"f_osc","Frecuencia del cristal",11.98,12.02,"MHz","Condensadores de carga de 33 pF (47 pF para un resonador cerámico)",{"symbol":171,"name":172,"typicalValue":173,"minValue":174,"maxValue":175,"unit":120},"VR","Umbral de reinicio al encendido",2.6,2.4,2.8,[177,182,187,191],{"title":178,"severity":179,"description":180,"mitigationStrategy":181},"Conecta V3 según la tensión de alimentación","critical","El pin 4 (V3) se conecta de forma distinta en los dos modos de alimentación. Con 5 V, V3 solo lleva un condensador de 0,1 µF a GND y no debe conectarse a VCC. Con 3,3 V, V3 se une a VCC y ninguna señal conectada al chip puede superar 3,3 V.","5 V: 0,1 µF de V3 a GND. 3,3 V: une V3 a VCC y mantén todas las señales conectadas a 3,3 V.",{"title":183,"severity":184,"description":185,"mitigationStrategy":186},"Sin resistencias en serie en D+ y D−","warning","El transceptor USB y el pull-up de D+ son internos. WCH recomienda conectar UD+ y UD− directamente a las líneas USB sin resistencias adicionales.","Lleva UD+\u002FUD− directamente al conector como un par paralelo con masa a ambos lados.",{"title":188,"severity":184,"description":189,"mitigationStrategy":190},"Alimentación inversa entre chips con alimentación separada","Si el CH340G se alimenta de USB VBUS mientras el microcontrolador tiene su propia fuente, circula corriente por TXD\u002FRXD hacia el lado sin alimentación. Los pines del CH340G no están protegidos contra esto (a diferencia de CH340K, CH340X y lotes posteriores de CH340C\u002FN).","Alimenta ambos desde la misma fuente o añade el aislamiento con diodos y N-MOSFET de la sección 7.7 de la hoja de datos.",{"title":192,"severity":193,"description":194,"mitigationStrategy":195},"Condensadores de carga del cristal","info","El CH340G necesita un cristal de cuarzo de 12 MHz entre XI y XO con condensadores de 33 pF a GND; un resonador cerámico suele necesitar unos 47 pF. Si el oscilador arranca con dificultad, WCH sugiere reducir a la mitad el condensador de XI.","Mantén cortas las pistas de XI\u002FXO y el cristal cerca del chip, rodeado de masa.",[197],{"title":198,"url":17,"type":199,"authority":200,"publisher":22,"documentNumber":201,"revision":202,"language":203},"CH340 USB to Serial Port Chip Datasheet","datasheet","primary","CH340DS1","3D","EN",[],[206,211],{"equivalentMpn":207,"manufacturer":208,"compatibilityType":209,"parameterDifferences":210},"CH340C","WCH","pin_to_pin_drop_in","Reloj interno: se omiten el cristal y sus condensadores; el pin 7 debe quedar sin conectar y el pin 8 pasa a ser OUT#. Rango de funcionamiento −20…70 °C; error de velocidad de transmisión inferior al 1,8 %.",{"equivalentMpn":212,"manufacturer":213,"compatibilityType":214,"parameterDifferences":215},"CP2102","Silicon Labs","functional_requires_bom_change","Encapsulado (QFN-28) y pines distintos, con su propio controlador; consulta la hoja de datos de Silicon Labs.",[217],{"boardSlug":218,"boardName":219,"designator":220,"roleOnBoard":221},"wemos-d1-mini-v3","WeMos D1 Mini","U3","Programación y telemetría por USB",{"canonicalUrl":223,"metaTitle":224,"metaDescription":225,"primarySearchCluster":226,"structuredDataSchema":230},"https:\u002F\u002Fcircuitbase.tech\u002Fcomponent\u002Fch340g","CH340G: pinout y circuito del conversor USB a UART | CircuitBase","Diagrama de pines del CH340G (SOP-16), conexión de V3 para 5 V y 3,3 V, cristal de 12 MHz, límites de alimentación y reglas de cableado USB, según la hoja de datos de WCH.",[227,228,229],"ch340g diagrama de pines","ch340g hoja de datos","ch340g circuito esquemático","Product",null,[233,249,267],{"id":234,"slug":234,"mpn":235,"primaryCategory":236,"manufacturers":237,"shortDescription":240,"packages":241,"packageTypes":244,"voltage":245,"recommendedOperating":248},"ams1117-3-3","AMS1117-3.3","voltage_regulator",[238,239],"Advanced Monolithic Systems","Various","Regulador de tensión lineal positivo de baja caída (LDO) de 1 A con salida fija de 3,3 V en encapsulado SOT-223.",[242],{"packageType":243,"pinCount":54},"SOT-223",[243],{"context":246,"min":247,"max":101,"typical":59,"outputTypical":125},"input",4.75,{"supplyVoltageMinV":247,"supplyVoltageTypV":59,"supplyVoltageMaxV":101},{"id":250,"slug":250,"mpn":251,"primaryCategory":236,"manufacturers":252,"shortDescription":256,"packages":257,"packageTypes":262,"voltage":263,"recommendedOperating":266},"lm7805","LM7805",[253,254,255],"Texas Instruments","STMicroelectronics","onsemi","Regulador lineal fijo de tensión positiva de 5 V y 1,5 A con limitación interna de corriente y apagado térmico, en encapsulados TO-220 y D2PAK.",[258,260],{"packageType":259,"pinCount":49},"TO-220",{"packageType":261,"pinCount":49},"D2PAK",[259,261],{"context":246,"min":264,"max":265,"typical":81,"outputTypical":59},7.5,25,{"supplyVoltageMinV":264,"supplyVoltageTypV":81,"supplyVoltageMaxV":265},{"id":268,"slug":268,"mpn":269,"primaryCategory":270,"manufacturers":271,"shortDescription":273,"packages":274,"packageTypes":279,"voltage":280,"recommendedOperating":283},"ne555","NE555P","timer_driver",[253,254,255,272],"Diodes Incorporated","Temporizador bipolar de precisión estándar en la industria para multivibradores astables, generación de pulsos monoestables y controladores PWM.",[275,277],{"packageType":276,"pinCount":72},"DIP-8",{"packageType":278,"pinCount":72},"SOIC-8",[276,278],{"context":281,"min":282,"max":29,"typical":59},"supply",4.5,{"supplyVoltageMinV":282,"supplyVoltageTypV":59,"supplyVoltageMaxV":29},{},1791754292092]