I have question about generic USB TTL Serial cables, FTDI FT232R-based. The cables differ in voltage, 5V, 3.3V and output current.
I need a cable for a USB to serial converter, for a modem with 3.3V voltage. Only 3 wires are required: Tx, Rx, GND (VCC not used). There are two models:
TTL-232RG-VSW3V3-WE: +3.3V / 50mA output.
TTL-232RG-VREG3V3-WE: +3.3V / 250mA output.
In my particular case the power output rate doesn't matter, as VCC is not used. But I may need this cable in the future for other electronic devices, like modems and routers, which may need VCC. Which from these two models is better for use with CPE devices (routers, modems, set-top boxes), the one rated at 50mA or 250mA?