Author Topic: looking for cheap TTL to RS232; not max232  (Read 3088 times)

0 Members and 1 Guest are viewing this topic.

Offline jsmokerTopic starter

  • Full Member
  • ***
  • Posts: 118
  • Helpful? 2
looking for cheap TTL to RS232; not max232
« on: April 23, 2007, 11:23:08 AM »
I was wondering, is there a full duplex chip that doesn't require any shorts or connections or capacitors.    I've worked with the MAX232 but I fee like it's an unnecessary pain to add capacitors.  Even with the MAX233, you still have to short a couple of the leads...again, what's with the extra work?  Is there a simple chip where all you connect is power, ground, UART I/O and RS232 I/O?  Mind you, full duplex, I've also DS275, but even with that, you have to short one pair of leads and it's only half duplex.

-JSmoker

Offline JonHylands

  • Expert Roboticist
  • Supreme Robot
  • *****
  • Posts: 562
  • Helpful? 3
  • Robot Builder/ Software Developer
Re: looking for cheap TTL to RS232; not max232
« Reply #1 on: April 23, 2007, 11:24:24 AM »
I've never found one. I use the DS-275 for most of my older stuff, although now I've started switching to USB solutions.

- Jon

Offline hazzer123

  • Supreme Robot
  • *****
  • Posts: 460
  • Helpful? 3
Re: looking for cheap TTL to RS232; not max232
« Reply #2 on: April 23, 2007, 11:25:34 AM »
Just curious... Why does it matter so much to short a few leads? I mean, it doesn't take two seconds.
Imperial College Robotics Society
www.icrobotics.co.uk

Offline jsmokerTopic starter

  • Full Member
  • ***
  • Posts: 118
  • Helpful? 2
Re: looking for cheap TTL to RS232; not max232
« Reply #3 on: April 23, 2007, 11:27:26 AM »
I like clean board with as few connections as possible... and I'm lazy...

-JSmoker

PS, sorry about the double post, didn't think the first one went through.

Offline Admin

  • Administrator
  • Supreme Robot
  • *****
  • Posts: 11,663
  • Helpful? 169
    • Society of Robots
Re: looking for cheap TTL to RS232; not max232
« Reply #4 on: April 23, 2007, 11:30:54 AM »
the MAX232 is actually like one or two decades old technology, there are many other better ICs today that offer rs232 functionality without the pains you mention - just search digikey for 'rs232'

digikey has like 450+ types in DIP alone . . .

 


Get Your Ad Here

data_list