Laying out a design where a solder jumper is used to enable the TE feature.
When the TE is not HIGH, can it just be left unconnected?
Thanks,
Ryan
LTC2854
Production
The LTC2854 and LTC2855 are low power, 20Mbps RS485/RS422 transceivers operating on 3.3V supplies. The receiver includes a logic-selectable 120Ω termination...
Datasheet
LTC2854 on Analog.com
LTC2855
Production
The LTC2854 and LTC2855 are low power, 20Mbps RS485/RS422 transceivers operating on 3.3V supplies. The receiver includes a logic-selectable 120Ω termination...
Datasheet
LTC2855 on Analog.com
Laying out a design where a solder jumper is used to enable the TE feature.
When the TE is not HIGH, can it just be left unconnected?
Thanks,
Ryan
Hi Ryan,
The resistor is effectively connected across the receiver input pins by setting TE high and disconnected when TE is LOW or the device is UNPOWERED. Rugged 3.3V RS485/RS422 Transceivers with Integrated Switchable Termination | Analog Devices Since it's controlled by logic, I do recommend setting it low as per the table in the datasheet for the performance to be predictable. I don't recommend floating it. It is a "Logic-Selectable" 120Ω Termination Resistor after all.
Regards,
Naveen
Hi Ryan,
The resistor is effectively connected across the receiver input pins by setting TE high and disconnected when TE is LOW or the device is UNPOWERED. Rugged 3.3V RS485/RS422 Transceivers with Integrated Switchable Termination | Analog Devices Since it's controlled by logic, I do recommend setting it low as per the table in the datasheet for the performance to be predictable. I don't recommend floating it. It is a "Logic-Selectable" 120Ω Termination Resistor after all.
Regards,
Naveen