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  Datasheet File OCR Text:
  CH9344 ? usb ? 4 ? CH9344 ? 1a http://wch.cn 1 CH9344 ? usb ? 4 ??? 4 ??? uart0/1/2/3 ? ?????? usb ? 2 ? ? 3.3v usb 2.0 ??????? 16c550 ??? ? 5 6 7 8 ? 1 2 ?? ??? 0 ? 1 ? ? ? ? ? 115200bps ? 7.8125mbps ? ? ?? ?? windows xp/vista/win7/win8/win10/win server/linux ? lqfp-48 ?? rohs 3 ? xi 29 nc 9 nc 8 ud+ 31 nc 15 rsvd1 30 nc 10 ud- 32 xo 28 cts0 26 nc 14 nc 12 nc 11 isp 37 nc 6 nc 7 txd0 19 nc 13 nc 39 rst# 38 vcc33 2 ri0 24 dcd0 23 dsr0 25 dtr0 21 rts0 20 nc 17 nc 16 rxd0 22 rxd3 40 txd3 41 rxd2 42 txd2 43 rxd1 44 txd1 45 nc 46 nc 47 gnd 34 vcc33 48 v12i 35 vcc33 18 vcc33 33 vcc33 27 v12o 3 gnd 1 nc 5 nc 36 nc 4 modem ? usb rxd0/txd0 usb CH9344 ?? uart0 rxd1/txd1 uart1 rxd2/txd2 uart2 rxd3/txd3 uart3
CH9344 ? ?? ? ?? ? lqfp-48 7 x 7mm 0.5mm 19.7mil ? lqfp48 ? ? ??? 4 ? ? 1 34 gnd ? ? 0v ? 2 27 18 33 48 vcc33 ? 3.3v ? 0.1uf ? 3 v12o ? ? ? 1.2v 3.3uf ? 35 v12i ? ? ? 1.2v 0.1uf ? 19 txd0 uart0 20 rts0 uart0 modem ? 21 dtr0 uart0 modem ? ?? 22 rxd0 uart0 23 dcd0 uart0 modem ? ? 24 ri0 uart0 modem ? ?? 25 dsr0 uart0 modem ? ?t 26 cts0 uart0 modem ? 28 xo ?? 29 xi 30 rsvd1 ? 12k 31 ud+ usb ? ? usb ? d+ 32 ud- usb ? ? usb ? d- 37 isp ? 38 rst# ? 40 rxd3 uart3 41 txd3 uart3 42 rxd2 uart2 43 txd2 uart2 44 rxd1 uart1 45 txd1 uart1 4 5 6 7 8 9 10 11 12 13 14 15 16 17 36 39 46 47 nc ? ? 5 ? 5.1. ? ? CH9344 ? ? ? ? ? xi ? 30mhz ? ?
CH9344 ? ? ? ? CH9344 ? ? ? xi xo ? ? 30mhz xi xo ?? 20pf ? CH9344 ? usb ? ? usb2.0 usb-phy usb ? ?? ? device 1.5k ud+ ud- ? ? pc usb ? ? ? ? esd ? ? ? 5 ? 5.2. ? CH9344 ? 4 ??? uart0/1/2/3 uart0 ? modem ? cts dsr ri dcd dtr rts 1 ? ? 5 6 7 8 1 2 ? ? ??? / ? / ? / ?? ? ? 1200 2400 4800 9600 19.2k 38.4k 57.6k 115.2k 230.4k 460.8k 921.6k 1.8432m 2.7648m 7.8125m ? 0.2 ? ? ? 2 6 6.1. ? ? ? ? ?? ? ? ? ta ? vcc33=3.3v v12i=1.2v -40 85 ts ? -55 125 vcc33 ?? ? ? vcc33 ? ? gnd -0.4 4.2 v vio ?? -0.4 vcc33 +0.2 v v12i ? ? -0.3 1.5 v 6.2. ta=25 vcc33=3.3v v12i=1.2v ? ? ? ? vcc33 gh ? ? 3.0 3.3 3.6 v v12i ? ? 1.15 1.2 1.3 v icc ? ? ? 20 45 150 ma islp ? ?? ? ? i/o 240 280 350 ua vil ? ? vcc33=3.3v -0.4 - 0.7 v vih ? ? ? vcc33=3.3v 2.0 - vcc33+0.4 v vol ? ? 6ma - - 0.4 v voh ? ? ? 5ma vcc33-0.4 - - v iup 25 45 80 ua iun -25 -45 -80 ua vpot v12i ? ? ?? 0.6 0.7 0.8 v


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