Data Sheet

The Data Sheet of CH340 (the first) 6
6.2.
Electrical Parameter (test conditions: TA=25℃, VCC=5V, exclude pin connected to USB bus)
(All the current parameters should multiply the coefficient of 40% when the power is 3.3V)
Name
Parameter Description Min. Typical Max. Units
V3 doesn’t connect to VCC 4.0 5 5.3
CH340G/T/R 2.8 3.3 3.6
VCC Supply Voltage
V3 connect to
VCC
CH340C/E/B 3.0 3.3 3.6
V
CH340G/C/E/T/R 7 20
ICC
Operating Supply
Current(Normal Operation)
CH340B 6 15
mA
VCC=5V 0.1 0.2
ISLP
Operating Supply Current(USB
Suspend)
VCC=3.3V 0.09 0.15
mA
VIL Low-level Input Voltage -0.5 0.7 V
VIH High-level Input Voltage 2.0 VCC+0.5 V
VOL Low-level Output Voltage(4mA draw current) 0.5 V
VOH
High-level Output Voltage(3mA output current)
(Output 100uA current during chip reset)
VCC-0.5 V
IUP Input current input with built-in pull-up resistor 3 150 300 uA
IDN Input current input with built-in pull-down resistor -50 -150 -300 uA
VR Restrict voltage when power-up reset 2.4 2.6 2.8 V
6.3. Sequence Parameter (test co
nditions: TA=25℃,VCC=5V)
Name
Parameter Description Min. Typical Max. Units
FCLK Frequency of input clock in XI 11.98 12.00 12.02 MHz
TPR Reset time of power-up 20 35 50 mS
7. Application
7.1.1 USB to RS232 Converter Configuration using CH340T