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RS-485 Line Drivers and Receivers, Linear Technology Linear Technology’s RS485 standards are widely used in local networks as well as data transfer over long distances and they are ideal in industrial and commercial applications. The Profibus (Process Field Bus) protocol is carried out for fieldbus solutions in factory and process automation environments. The RS422 standard is similar to the RS485 standard but does not permit multiple drivers on a bus. The RS485 Transceiver (formally TIA-485) defines a differential data transmission up to 10Mbps.The low power CMOS RS485/RS422 Interface transceivers feature failsafe receivers, high voltage, high data rates, high ESD protection types and transceivers (TXRX) featuring pin-controlled switchable 120 Ohm termination resistors. Balanced line offers excellent noise rejection

Parameter	Min	Typ	Max	Unit	Description
Supply Voltage (VCC)	2.7	-	5.5	V	Operating supply voltage range
Data Rate	-	-	100	Mbps	Maximum data rate
Input Voltage Range	-0.3	-	VCC+0.3	V	Differential input voltage range
Output Voltage Swing	-	-	VCC-0.4	V	Differential output voltage swing
Power Consumption	-	16	-	mA	Typical supply current at 3.3V, no load
Propagation Delay	-	2.9	-	ns	Propagation delay per channel
Skew	-	0.2	-	ns	Channel-to-channel skew
Common Mode Input Range	-0.3	-	VCC+0.3	V	Common mode input voltage range
ESD Rating	-	-	8000	V	Human body model ESD protection level

Instructions for Use:

1. Power Supply:

   • Ensure the supply voltage (VCC) is within the specified range of 2.7V to 5.5V.

2. Signal Integrity:

   • Keep signal traces as short as possible to minimize reflections and crosstalk.
   • Use controlled impedance lines if operating at high data rates.

3. Input and Output Protection:

   • Do not exceed the input voltage range to avoid damage to the device.
   • Ensure differential inputs are within ±0.3V of VCC or GND.

4. Layout Considerations:

   • Place decoupling capacitors close to the power pins to reduce noise.
   • Maintain proper grounding practices to ensure stable operation.

5. Data Transmission:

   • Verify that the data rate does not exceed 100 Mbps to prevent data corruption.
   • Account for propagation delay and skew in timing-sensitive applications.

6. Handling Precautions:

   • Handle with care due to ESD sensitivity; use appropriate ESD precautions.
   • Avoid exposing the device to voltages exceeding its ESD rating.

(For reference only)