MAX 232 related doubts

[Electrix]

Please clear my doubts:

1. What do these triangular shaped symbols signify ??

2. What do these Hysteresis Square loops signify ??

3. When and where does one use the Vs+ and Vs- o/p pins ??

 

[checkmate]

1. What do these triangular shaped symbols signify ??

Geez. A good guess would be that they are output data pins.

2. What do these Hysteresis Square loops signify ??

What hysteresis square loops?

3. When and where does one use the Vs+ and Vs- o/p pins ??

The MAX232 has a built-in voltage doubler and invertor. These are the outputs. You can use them if you want to, but note that they can't supply much current.

 

[Sebi]

2. What do these Hysteresis Square loops signify ??

The inputs are schmitt-triggers.

 

[Jay.slovak]

Please clear my doubts:

1. What do these triangular shaped symbols signify ??

2. What do these Hysteresis Square loops signify ??

3. When and where does one use the Vs+ and Vs- o/p pins ??

1. It means that input/output is Inverted, eg. log. 1 is represented by 0V
2. Yes, it's Schmit trigger input (has different voltage level to flip to 1 then to flip back to 0)
3. It's an output from internal charge pump, you can use it if you need +8V or -8V in your circuit (eg LCD Contrast drive), but only couple mA.