Dear ADI team
I have two questions about LTC2870.
1.In VL Logic Supply and Logic Pins item.
[RS232 and RS485 driver outputs are undriven and the
RS485 termination resistors are disabled when VL or VCC
is grounded or VCC is disconnected.]
When Vcc > 3V,VL=0V,
is it correct to use 125kΩ pull-down for Y and Z pins?
Also, is it correct to use 125kΩ pull-down for A and B pins?
2.Please tell me how to calculate the current supply capacity of [3V TO 5.5V] that is safe even if the output is short-circuited in RS485.
・Vcc is 3.3mA max.
・SW is 250mA when Y and Z is short
Is this correct?
Best regards,