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From: Tilmann Reh
Subject: Re: single discrete RS232 driver
Date: Tue, 17 Dec 2002 20:29:15 +0100
Organization: Autometer GmbH
NNTP-Posting-Date: 17 Dec 2002 19:27:41 GMT
X-Mailer: Mozilla 4.78 [de] (Windows NT 5.0; U)
Miguel AB Silva schrieb:
> In the project I'm working in I use a MAX238 to drive 4 RS232 lines and
> recieve another 4 RS232 lines. My problem is: I need another line to be
> drived from TTL to RS232 (from a module to a PC computer). IMHO it would be
> enough to drive this line directly to the RS232 transceiver in the PC (its a
> control signal with very low speed) as i tested it with the PC´s in the
> company. Can I assume that this will work with any PC ? Still my boss wants
> the signal to be interfaced respecting the RS232 interface, i. e., my
> circuit should output > 3v for one level and < -3v for the complementary
> level. Can anyone give an hint on how to solve this ? Maybe based on the
> positive and negative voltages available on certain pins of the MAX ?
Ever thought of using a chip with 5 transmitters and 3 receivers,
and then build a discrete receiver (which is easier)?
Dipl.-Ing. Tilmann Reh
Autometer GmbH Siegen - Elektronik nach Maß.
In a world without walls and fences, who needs Windows and Gates ?
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