Part Number: SN65HVD1780 Hi Sirs,
Sorry to bother you.
Our design as below
We would like to know if we would like to use 1780 false-safe circuit function, to remove R289/R290 are better?? or don't need care for these? Thanks!!
Part Number: SN65HVD1780-Q1
Hi, team,
I have some questions about SN65HVD1780-Q1 may need your confirmation.
1. If two side SN65HVD1780-Q1 is with different Vcc (3V3 and 5V), can it work?
2. If chip is off power and add 13.2V at A/B pin, is…
Part Number: SN65HVD1780 HI,
We used SN65HVD1780 as the RS485 line driver in our product .While measuring the R and D wave form we found the below observation.
The R signal which is the receive signal (TTL) is having a dip when the D (transmit) signal…
Part Number: SN65HVD1780-Q1 Other Parts Discussed in Thread: SN65HVD72 , SN65HVD82 Hi team,
My custmer is interested in our sn65hvd1780-Q1.
They will use this device with Vcc 3.3V.
If they use at this condition, can they recieve 5V data? If yes…
Other Parts Discussed in Thread: SN65HVD1780 I have an application whereby an MCU is controlling a SN65HVD1780 on a RS485 network bus with another device. The DE and ~RE lines are connected together and they are controlled by the MCU. It appears that…
I need to know if I need to add anymore termination components to the front end of my RS485 system?
Already using common mode filter, Bi-Direction TVS on each line and between the lines and ferrite beads inline with A and B lines on all nodes.
# of…
Hi Paul,
The failsafe feature of the device guarantees that when the bus is floating, the output of the receiver is in a known state. This is basically done by adding a bias to the receiver.
If you are only concerned about the output of this one node…
Other Parts Discussed in Thread: SN65HVD1780
The SN65HVD1780 RS-485 transceiver fails to pass received LOW signals through. The signal source is a SerialComm CON-485-PE9. It's D+ output is tied to the A pin, pin 6, of the '1780. The source's D- output…
Other Parts Discussed in Thread: SN65HVD1780 Hello,
we would like to share RS485 pins (A/B) with generic I/O pins. So, pins would be software selectable I/O pair or RS485. I/O pin is basically 0-20V input connected to amplifier and comparator. Output…
