# USB to Serial cable and VCC current output [closed]

I have question about generic USB TTL Serial cables, FTDI FT232R-based. The cables differ in voltage, 5V, 3.3V and output current.

USB TTL Serial Cables

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?

## closed as off-topic by Joe Hass, Chetan Bhargava, Matt Young, placeholder, KazMay 27 '14 at 17:36

This question appears to be off-topic. The users who voted to close gave these specific reasons:

• "Questions on the use of electronic devices are off-topic as this site is intended specifically for questions on electronics design." – placeholder, Kaz
• "Questions seeking recommendations for specific products or places to purchase them are off-topic as they are rarely useful to others and quickly obsolete. Instead, describe your situation and the specific problem you're trying to solve." – Joe Hass, Chetan Bhargava, Matt Young
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