5 volts can be used to drive the chip of the LCD 1602, but there are some issues that need to be noted. First, you need to confirm whether the backlight voltage of the LCD 1602 is 3.3 volts, if it is, you need to use a booster circuit to increase the 5 volts voltage to 3.3 volts, otherwise the backlight may be too bright or too dark.
Secondly, the use of 5 volts may also lead to a shortened life of the LCD 1602, because the chip may operate at a higher temperature at 5 volts. Therefore, the above problems need to be paid attention to when using 5 volts to drive the LCD 1602 to ensure its normal operation and protect its life.
According to the specifications of the LCD 1602, its chip drive voltage is 3.3 volts. If a 5 volt drive is used, it may cause the chip to overvoltage and damage the chip or other circuit components. Therefore, the use of 5-volt drive LCD 1602 is not recommended. In order to ensure normal operation and long-term stability, it is recommended to use the specification of 3.3 volts to drive. If you need to use 5 volts, consider using an adapter or a voltage regulator circuit to lower the voltage to 3.3 volts. This can ensure the normal operation and service life of the LCD 1602.