Operating instructions

26 1892 1344 - SX450G Transceiver Operator Guide v1.7 / Nov 2007
A suitable inverting TTL to RS232 buffer circuit using the industry-standard MAX232 part
is shown in Figure 12.
Figure 12 - Suggested RS232 buffer circuit
The MAX232 is obtainable from many component suppliers, e.g. RS Components stock
no. 655-290.
v Note that the MAX232 has an absolute maximum supply voltage of 6V, and
therefore the SX450G and the adaptor should be run from a 5V DC supply.