CH340C USB to serial UART bridge
USB to UART bridge with MODEM control signals (RTS#, DTR#, DSR#, DCD#, RI#, CTS#), built-in oscillator interface, 3.3V/5V supply options, SOP-16 package.
Aliase:CH340C
SOP16 Top View
16 Pins
Pinout Table16
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | GND | Ground | Common ground, connected to USB bus ground |
| 2 | TXD | Digital | Serial data output |
| 3 | RXD | Digital | Serial data input, built-in pull-up and pull-down |
| 4 | V3 | Power | 3.3V supply input or decoupling for 5V operation |
| 5 | UD+ | Digital | USB D+ data line, connect directly without series resistor |
| 6 | UD- | Digital | USB D- data line, connect directly without series resistor |
| 7 | NC | NC | Empty pin for CH340C, must be left floatingCrystal oscillator input (CH340T/R/G) |
| 8 | ~OUT | Digital | MODEM general output, software defined, active lowCrystal oscillator output (CH340T/R/G) |
| 9 | ~CTS | Digital | MODEM clear to send input, active low |
| 10 | ~DSR | Digital | MODEM data device ready input, active low |
| 11 | ~RI | Digital | MODEM ring indicator input, active low |
| 12 | ~DCD | Digital | MODEM carrier detect input, active low |
| 13 | ~DTR | Digital | MODEM data terminal ready output, active low |
| 14 | ~RTS | Digital | MODEM request to send output, active low |
| 15 | R232 | Digital | Auxiliary RS232 enable, active high, built-in pull-down |
| 16 | VCC | Power | Positive power input, needs 0.1uF decoupling capacitor |