Details

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BUY MAX487ESA https://www.utsource.net/itm/p/11226951.html
IC TRANSCEIVER HALF 1/1 8SOIC

Below is the parameter table and instructions for the MAX487ESA, a RS-485/RS-422 transceiver.

MAX487ESA Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Supply Voltage	VCC	4.75	5.0	5.25	V
Driver Output High Voltage	VODH	2.0	2.5	3.0	V	VCC = 5V, IOL = -100mA
Driver Output Low Voltage	VODL	-0.5	-1.0	-1.5	V	VCC = 5V, IOH = 100mA
Receiver Input High Voltage	VIRH	2.0			V
Receiver Input Low Voltage	VIRL	-2.0			V
Receiver Input Threshold	VIT	±200			mV
Driver Enable Input High	VIH	2.0			V
Driver Enable Input Low	VIL	0.8			V
Driver Enable Current	IEN	-1		1	μA	DE = 0V or 5V
Driver Output Current	IOL	-100			mA	VODH = 2.5V
Driver Output Current	IOH	100			mA	VODL = -1.0V
Receiver Output High	VOH	2.4			V	VCC = 5V, IL = -4mA
Receiver Output Low	VOL	0.4			V	VCC = 5V, IL = 4mA
Receiver Output Current	IOL	-4			mA	VOL = 0.4V
Receiver Output Current	IOH	4			mA	VOH = 2.4V
Operating Temperature	Toperating	-40		85	°C
Storage Temperature	Tstorage	-65		150	°C

Instructions for MAX487ESA

1. Power Supply:

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

2. Driver Enable (DE) and Receiver Enable (RE):

   • Set DE high to enable the driver.
   • Set RE low to enable the receiver.
   • When both DE and RE are high, the device is in a high-impedance state.

3. Data Transmission:

   • To transmit data, set DE high and apply the data to the DI (driver input) pin.
   • The data will be transmitted on the differential lines (RO and /RO).

4. Data Reception:

   • To receive data, set RE low.
   • The received data will be available on the RO (receiver output) pin.

5. Termination Resistors:

   • For proper operation, terminate the bus with a 120Ω resistor between the differential lines (RO and /RO) at both ends of the bus.

6. Signal Levels:

   • Ensure that the signal levels on the differential lines are within the specified range to avoid damage to the device.

7. Operating Temperature:

   • The device is designed to operate within the temperature range of -40°C to 85°C.

8. Storage Temperature:

   • Store the device in a temperature range of -65°C to 150°C.

9. ESD Protection:

   • Handle the device with care to avoid electrostatic discharge (ESD) damage.

10. Pin Configuration:

    • Refer to the datasheet for the specific pin configuration and layout.

By following these instructions, you can ensure reliable operation of the MAX487ESA in your RS-485/RS-422 communication system.

(For reference only)