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F: Typical TTL-RS232 Circuits
The following figures demonstrate typical TTL-to-RS232 conversion circuits.
Circuit consists of:
- 2 Max232 compatible chips
- 8 capacitors
- 1 DB-9 connector
Note: If you need just the DTR and DCD or RTS and CTS signals, you can
use only one Max232 chip.
Figure F-1: TTL-RS232 (DB-9) Circuit
Max232
Max232
DCD
Tx
GND
RTS
CTS
DB-9
male
(DTE Configuration)
F-1
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