Details

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BUY MAX3491ESD+T IC TXRX RS485/422 10MBPS 14SOIC MAXIM 2.5K/ROLL https://www.utsource.net/itm/p/9225045.html

Parameter	Description	Value
Part Number	Full Part Number	MAX3491ESD+T
Function	Integrated Transceiver	RS-485/422
Data Rate	Maximum Data Rate	10 Mbps
Package	Package Type	14-SOIC (Small Outline Integrated Circuit)
Supply Voltage	Operating Supply Voltage Range	3.0V to 5.5V
Operating Temperature	Operating Temperature Range	-40°C to +85°C
Driver Output Current	Driver Output Current	±250mA (Typical)
Receiver Input Sensitivity	Receiver Input Sensitivity	±200mV (Typical)
Driver Enable Time	Driver Enable Time	50ns (Typical)
Driver Disable Time	Driver Disable Time	50ns (Typical)
Receiver Enable Time	Receiver Enable Time	50ns (Typical)
Receiver Disable Time	Receiver Disable Time	50ns (Typical)
ESD Protection	ESD Protection	±15kV (Human Body Model)
Supply Current	Supply Current (Quiescent)	1.2mA (Typical)
Pin Count	Number of Pins	14
Order Quantity	Minimum Order Quantity	2,500 (Roll)

Instructions for Use:

1. Power Supply:

   • Connect the VCC pin to the power supply voltage (3.0V to 5.5V).
   • Connect the GND pin to the ground.

2. Signal Lines:

   • Connect the A and B pins to the differential data lines for RS-485/422 communication.
   • Ensure proper termination resistors (120Ω) are used at the ends of the bus to prevent signal reflections.

3. Driver Control:

   • Use the DE (Driver Enable) and RE (Receiver Enable) pins to control the direction of data transmission.
   • Set DE high and RE low to enable the driver (transmit mode).
   • Set DE low and RE high to enable the receiver (receive mode).

4. Data Input/Output:

   • Connect the DI (Data Input) pin to the microcontroller or other data source when transmitting.
   • Connect the RO (Receiver Output) pin to the microcontroller or other data destination when receiving.

5. ESD Protection:

   • The device includes built-in ESD protection, but handle the IC with care to avoid damage from static electricity.

6. Layout Considerations:

   • Keep the layout compact to minimize noise and interference.
   • Use decoupling capacitors (0.1μF) close to the VCC and GND pins to ensure stable operation.

7. Storage and Handling:

   • Store the IC in a dry, cool place.
   • Follow standard ESD handling procedures to prevent damage during handling and installation.

(For reference only)