Click here to ask about the production status of specific part numbers. Evaluates: MAX22506E MAX22506E Evaluation Kit General Description Startup Procedure The MAX22506E evaluation kit (EV kit) is a fully assembled The EV kit is fully assembled and tested. Follow the steps and tested PCB that demonstrates the functionality of the below to verify board operation. MAX22506E half-duplex, high speed RS-485/RS-422 1) Ensure that all jumpers are in their default positions transceiver. The EV kit operates from a single 3V to 5.5V (see Table 1). supply and includes selectable on-board termination. 2) Set the DC power supply to 3.3V and connect the DC power supply between VCC (TP1) and GND Features (TP2) test points on the EV kit. Operates From a Single 3V to 5.5V Supply 3) Connect the oscilloscope probes to the DI input (TP7), A (TP8), B(TP9), and RO (TP4). Terminal Block Connectors for Easy 4) Turn on the power supply. RS-485/RS-422 Evaluation 5) Set the signal/function generator to output a 25MHz Fully Assembled and Tested 0-to-3V square wave. 6) Connect the signal/function generator to the DI Quick Start test point. Required Equipment 7) Using the oscilloscope, verify that the A, B, and RO- outputs switch as the DI signal toggles. MAX22506E EV kit 3.3V, 500mA DC power supply 50MHz Signal/function generator Ordering Information appears at end of data sheet. Oscilloscope 319-100683 Rev 0 2/21Evaluates: MAX22506E MAX22506E Evaluation Kit To actively control both enables, remove the J2 and J4 Detailed Description of Hardware shunts and close J5, which connects DE and RE together. The MAX22506E EV kit is a fully assembled and tested J5 is DNI, by default. Install a 2-pin header to use the J5 circuit board for evaluating the MAX22506E high-speed, jumper. half-duplex RS-485/RS-422 transceiver (U1). The EV Termination for an End-of-Line Transceiver kit can be used for standalone evaluation or can be connected (using the on-board terminal block) to an The MAX22506E EV kit includes a 120 termination RS-485/RS-422 network for easy in-system evaluation. resistor (R2) between the A and B RS-485 driver outputs/ receiver inputs on the MAX22506E. Driver and Receiver Enable Selection The EV kit features three jumpers (J2, J4, and J5) to enable/disable the driver and receiver outputs. Set J2 to low (2-3) to enable the receiver. Set J4 to high (1-2) to enable the driver. Table 1. Jumper Table (J2, J4, J5) JUMPER SHUNT POSITION DESCRIPTION 1-2 RE is high. The RS-485 receiver is disabled. J2 2-3* RE is low. The RS-485 receiver is enabled. 1-2* DE is high. The RS-485 driver outputs are enabled. J4 2-3 DE is low. The RS-485 driver outputs are disabled. Open* DE and RE are not connected together. J5 Closed DE and RE are connected together. *Default position. Ordering Information PART TYPE MAX22506EEVKIT EV Kit Denotes RoHS compliance. Maxim Integrated 2 www.maximintegrated.com