Details

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BUY MAX485EPA MAX485 https://www.utsource.net/itm/p/8871909.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating range	3.0		5.5	V
Input High Voltage	VIH		2.0		VCC	V
Input Low Voltage	VIL		0		0.8	V
Output High Voltage	VOH	IOL = -4mA	VCC-0.4		VCC-0.1	V
Output Low Voltage	VOL	IOH = 4mA	0		0.2	V
Driver Enable Input Current	IIN	VIN = VCC/2	-1	0	1	渭A
Receiver Input Current	IIH	VIN = VCC-0.7V	-1	0	1	渭A
Data Rate				20		Mbps
Propagation Delay	tPD		350			ns
Power-on Reset Time	tPOR		100			渭s

Instructions for MAX485EPA (MAX485)

1. Power Supply:

   • Connect the VCC pin to a power supply within the operating range of 3.0V to 5.5V.
   • Ground the GND pin.

2. Data Transmission:

   • To enable data transmission, connect the DE and RE pins to control logic levels.
   • For receiving data, set DE low and RE high.
   • For transmitting data, set both DE and RE low.

3. RS-485 Communication:

   • Connect the A and B pins to the RS-485 differential bus.
   • Ensure termination resistors are used at each end of the bus for proper signal integrity.

4. Signal Levels:

   • Ensure input signals meet the specified input voltage levels (VIH and VIL) for reliable operation.

5. Data Rate:

   • The device supports data rates up to 20 Mbps; ensure that the communication protocol does not exceed this limit.

6. Propagation Delay:

   • Account for propagation delay in timing calculations when designing your system.

7. Power-on Reset:

   • Allow sufficient time for the power-on reset period (tPOR) before initiating any communication.

8. Environmental Considerations:

   • Operate the device within recommended temperature ranges to ensure reliability and performance.

(For reference only)