From PICLIST@MITVMA.MIT.EDU Fri Nov 15 08:01:05 2002 Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP (SMTPD32-7.13) id AA411A1800D6; Fri, 15 Nov 2002 08:01:05 -0800 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.007DCB00@cherry.ease.lsoft.com>; Fri, 15 Nov 2002 10:46:55 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8d) with spool id 4181 for PICLIST@MITVMA.MIT.EDU; Fri, 15 Nov 2002 10:46:49 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 2436; Fri, 15 Nov 2002 10:46:36 -0500 Received: from *unknown [64.69.111.211] by mitvma.mit.edu (IBM VM SMTP Level 320) via TCP with ESMTP ; Fri, 15 Nov 2002 10:46:35 EST X-Warning: mitvma.mit.edu: Host *unknown claimed to be imtrant1.imtra.com Received: from maxengineering1 ([192.168.1.9]) by imtrant1.imtra.com with Microsoft SMTPSVC(5.0.2195.4905); Fri, 15 Nov 2002 10:45:53 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 X-OriginalArrivalTime: 15 Nov 2002 15:45:53.0796 (UTC) FILETIME=[14A70440:01C28CBE] Message-ID: Date: Fri, 15 Nov 2002 10:45:50 -0500 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: Paul Hutchinson Subject: Re: [EE]: 3.3Volt for MAX 232 To: PICLIST@MITVMA.MIT.EDU In-Reply-To: <000f01c28cbd$0de7d540$520a7dcb@homepc> X-RCPT-TO: Status: R X-UIDL: 277600688 X-Evolution-Source: pop://mailinglist%40farcite.net@mail.farcite.net/ X-Evolution: 00000781-0000 If you do not believe the specs provided by the manufacturer of the chip then why are you using that manufacturers product? If the MAX232 worked fine at 3.3V over time/temperature/output load/etc... don't you think Maxim would say so? They certainly could sell more chips if they did say so. Paul > -----Original Message----- > [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Soon Lee > Sent: Friday, November 15, 2002 10:39 AM > > I was think when the voltage is at 5volts the voltage double on board the > Max 232 will create a +10V and -10V > when i use 3.3 V the value is at +-6.6volt. > > I think as long as the PC accept the value of the output then the data can > be read. any way the RS232 protocol will not only work at +-10V but at a > range > > > -5 to -15 Volts 5 -to 15 Volts > > therefore as long as the volt produce is between the acceptable range i > think is safe. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.