Application description

AN3259

6/25

Doc ID 17835 Rev 1

3.2

Application schematics

Figure 1 shows the application electrical schematics.

If the RS232 cable is not a null-modem cable (transmit and receive lines not crosslinked),

connect U1 pin14 to DB9 pin2 and U1 pin13 to DB9 pin3.

Figure 1.

Application schematics

Table 2.

List of packaged components

Part name

Component description

Package

ST232B

Very-high speed ultralow-power consumption 5 V

RS232 driver/receiver used for UART 5/12 V level

shifter.

SO16