Contents
How many volts on RS485?
Standard RS485 transceivers operate over a limited common mode voltage range that extends from –7V to 12V. In a commercial or industrial environment, ground faults, noise, and other electrical interference can induce common mode voltages that exceed these limits.
Does MAX485 work on 3.3 V?
Standard operating voltage of MAX485 as per its datasheet is 5V. With 3.3V the differential output voltage will be lower which will affect the operation with longer cables. Also proper functioning of the chip is not guaranteed at anything less than 4.75V.
CAN High Low Voltage?
CANconsists of two dedicated wires for communication. These wires are called CAN high (CAN_H) and CAN low (CAN_L). When the CANbus is in idle mode, both of these lines carry 2.5V but when data bits are being transmitted, the CAN high line goes to 3.75V and the CAN low drops to 1.25V.
What is the common mode voltage of a RS485 transceiver?
Standard RS485 transceivers operate over a limited common mode voltage range that extends from –7V to 12V. In a commercial or industrial environment, ground faults, noise, and other electrical interference can induce common mode voltages that exceed these limits.
Can a 5V transceiver be used on a 3.3V bus?
The LTC2862–LTC2865 transceivers are fully interoperable with 5V-powered transceivers on the same bus when operating from either a 3.3V or 5V supply. Many microcontroller systems operate at voltages lower than 3.3V.
Which is failsafe threshold does The RS485 transceiver use?
Many RS485 transceivers have asymmetrical receiver thresholds that employ only the negative signal threshold and the failsafe threshold voltages. This provides effective failsafe detection but causes distortions in the duty cycle of the receiver output RO in the case of attenuated signals with slow edges.
Is the max3362 transceiver compatible with RS-485?
The output level is guaranteed at +1.5V with a standard 54Ω load, compliant with RS-485 specifications. The transceiver draws 1.7mA supply current when unloaded or fully loaded with the drivers disabled. Additionally, the MAX3362 has a low-power shutdown mode, reducing the supply current to 1µA.