Click here to ask about the production status of specific part numbers. Evaluates: MAX22507E/MAX22508E MAX22507E Evaluation Kit Startup Procedure General Description The EV kit is fully assembled and tested. Follow the steps The MAX22507E evaluation kit (EV kit) is a fully assembled below to verify board operation. and tested PCB that demonstrates the functionality of the MAX22507E and the MAX22508E full-duplex high 1) Ensure that all jumpers are in their default positions speed RS-485/RS-422 transceiver. The EV kit includes (see Table 1). on-board termination for easy point-to-point evaluation. 2) Set the DC power supply to 5V and connect the DC The EV kit is assembled using MAX22507E in a 10-pin power supply to the V test point (TP1). Connect CC TDFN package, but also provides equivalent functional the ground terminal of the 5V supply to the GND test evaluation for the MAX22508E, which is offered in a 8-pin point (TP2). SOIC package. 3) Turn on the power supply. 4) Set the signal/function generator to output a 25MHz Features 0V-to-5V square wave. Operates from a Single 3V to 5V Supply 5) Connect the signal/function generator to the DI test point (TP7). Terminal Block Connectors for Easy RS-485/RS-422 6) Using the oscilloscope, verify that the Y (TP11), Z Evaluation (TP12), and RO (TP4) outputs switch as the DI signal Fully Assembled and Tested toggles. Quick Start Required Equipment MAX22507E EV kit 5V, 500mA DC power supply 50MHz signal/function generator Ordering Information appears at end of data sheet. Oscilloscope 319-100698 Rev 0 3/21Evaluates: MAX22507E/MAX22508E MAX22507E Evaluation Kit Table 1. Jumper Table (J3J6, J8, J14) Detailed Description of Hardware The MAX22507E EV kit is a fully assembled and tested SHUNT JUMPER DESCRIPTION POSITION circuit board for evaluating the MAX22507E high speed full-duplex RS-485/RS-422 transceiver (U1). The EV kit RE is high. The RS-485 receiver is 12 can be powered from a single supply and can be used disabled. J2 for standalone evaluation or can be connected (using the RE is low. The RS-485 receiver is on-board terminal block) to an RS-485/RS-422 network 23* enabled. for easy in-system evaluation. The MAX22508E does not DE is high. The RS-485 driver outputs feature the driver enable (DE) or receiver enable (RE) pins. 12* are enabled. To emulate the functional performance of the MAX22508E, J4 tie DE high (J4 is 12) and RE low (J2 is 23). DE is low. The RS-485 driver outputs 23 are disabled. Driver and Receiver Enable DE and RE are not connected together. The EV kit features three jumpers (J2, J4, and J5) to Open* J5 is DNI by default. J5 enable/disable the driver and receiver outputs. Set J2 to low (23) to enable the receiver. Set J4 to high (12) to Closed DE and RE are connected together. enable the driver. Open A is not connected to Y. J13 To actively control both enables, remove the J2 and J4 Closed* A is connected to Y. jumpers and close J5. Note that J5 is not installed, by Open B is not connected to Z. default. Install the J5 jumper to use this funcitonality. J15 Closed* B is connected to Z. Loopback Configuration To test the MAX22507E in a loopback configuration, close *Default position. the J13 and J15 jumpers. J13 connects the A input to the Y output. J15 connects the B input to the Z output. Ordering Information Termination for an End-of-Line Transceiver PART TYPE The MAX22507E EV kit includes 120 termination resistors MAX22507EEVKIT EV Kit between the Y and Z driver outputs (R6) and between the Denotes RoHS compliance. A and B receiver inputs (R7) on the MAX22507E. Maxim Integrated 2 www.maximintegrated.com