Details

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BUY MAX485CPA https://www.utsource.net/itm/p/12597595.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	4.75	-	5.25	V
Supply Current (Receive Mode)	ICC(R)	VCC = 5V, No Load	-	300	-	μA
Supply Current (Transmit Mode)	ICC(T)	VCC = 5V, No Load	-	400	-	μA
Driver Output High-Level Voltage	VODH	VCC = 5V, IOL = 100mA	2.0	-	5.0	V
Driver Output Low-Level Voltage	VODL	VCC = 5V, IOH = -100mA	0.2	-	0.6	V
Receiver Input High-Level Voltage	VRH	-	2.0	-	5.0	V
Receiver Input Low-Level Voltage	VRL	-	0.0	-	0.8	V
Receiver Output High-Level Voltage	VOH	VCC = 5V, IOL = 0.4mA	2.4	-	5.0	V
Receiver Output Low-Level Voltage	VOL	VCC = 5V, IOH = -4.0mA	0.4	-	0.5	V
Differential Input Voltage Range	VID	-	-	-	12	V
Common-Mode Input Voltage Range	VICM	-	-2	-	7	V
Driver Rise Time	trD	VCC = 5V, CL = 50pF	-	30	-	ns
Driver Fall Time	tfD	VCC = 5V, CL = 50pF	-	30	-	ns
Receiver Propagation Delay	tpdR	VCC = 5V, VID = 200mV	-	350	-	ns
Receiver Maximum Data Rate	fmax	VCC = 5V	-	-	2.5	Mbps

Instructions for Using the MAX485CPA:

1. Power Supply:

   • Connect the V_CC pin to a 5V power supply.
   • Connect the GND pin to the ground.

2. Data Transmission:

   • Connect the DI (Data Input) pin to the microcontroller or other data source.
   • Connect the DE (Driver Enable) pin to a control signal to enable transmission.
   • Connect the RO (Receiver Output) pin to the microcontroller or other data destination.
   • Connect the RE (Receiver Enable) pin to a control signal to enable reception.

3. Differential Bus Connections:

   • Connect the A and B pins to the differential bus lines.
   • Ensure that the bus lines are properly terminated with a 120Ω resistor at each end to prevent reflections and ensure reliable communication.

4. Configuration:

   • To transmit data, set DE high and RE low.
   • To receive data, set DE low and RE high.
   • For half-duplex operation, connect DE and RE together and control them with a single signal.

5. Signal Levels:

   • Ensure that the differential input voltage (V_ID) is within the specified range (-12V to +12V).
   • Ensure that the common-mode input voltage (V_ICM) is within the specified range (-2V to +7V).

6. Timing:

   • The receiver propagation delay (t_pdR) should be considered when designing the timing of your system.
   • The maximum data rate (f_max) is 2.5 Mbps, so ensure that your system can handle this speed.

7. Supply Current:

   • Monitor the supply current (I_CC(R) and I_CC(T)) to ensure it does not exceed the typical values during operation.

8. Environmental Considerations:

   • The device is designed for industrial environments and can operate over a wide temperature range (-40°C to +85°C).

By following these instructions and parameters, you can effectively integrate the MAX485CPA into your RS-485 communication system.

(For reference only)