tony_lth
Advanced Member level 5
Hi,
I want to switch a RS232 signal to TWO terminals with a SPDT.
I noticed RS232 level is up to +-15V.
So I selected this SPDT DG470EQ-T1-E3, and attachment is its datasheet.
But I have some questions about it:
1. Because of positive level signal and negative level signal of RS232, should I use +-15V as the power supply for DG470EQ-T1-E3 IC?
2. I have found some single positive power supply can switch on RS232 signals, so is it OK to use +12V as the power supply for DG470EQ-T1-E3 IC?
3. For the control logic 0/1 of the DG470EQ-T1-E3 IC, I have two options, which should I use?
3a. GND as logic 0, and +5V as logic 1
3b. +5V as logic 0, and -5V as logic 1, which meets the RS232 definition.
Many thanks.
Best,
Tony Liu
I want to switch a RS232 signal to TWO terminals with a SPDT.
I noticed RS232 level is up to +-15V.
So I selected this SPDT DG470EQ-T1-E3, and attachment is its datasheet.
But I have some questions about it:
1. Because of positive level signal and negative level signal of RS232, should I use +-15V as the power supply for DG470EQ-T1-E3 IC?
2. I have found some single positive power supply can switch on RS232 signals, so is it OK to use +12V as the power supply for DG470EQ-T1-E3 IC?
3. For the control logic 0/1 of the DG470EQ-T1-E3 IC, I have two options, which should I use?
3a. GND as logic 0, and +5V as logic 1
3b. +5V as logic 0, and -5V as logic 1, which meets the RS232 definition.
Many thanks.
Best,
Tony Liu