AM26LS31: I need to generate enable pin logic which convert (0V to -5V and 0V ) and if (+5V then it converted to 0V and -5V)

A differential line driver like the AM26xx31 outputs RS-422 voltages, which are not what you want.

It might be possible to use comparators. What power supplies do you have available? What is the required switching speed?

Dear Clemens sir,

I need basic logic circuit which perform simple work ,can you please suggest we will preferred SMD component as we have size constrains. 

1. Power supplies available are +15V and +5V  .

2 . we need 1uSec max. switching speed .

Without a negative supply, you will not be able to generate a −5 V output signal.

Hi sir , can you recommend some ic ,which generate -5v .

Means input logic act as enable pin to negative voltage generator IC?

Hi Tapajit,

The only devices we would have that would be able to generate a negative voltage relative to GND without a negative supply would probably be our RS232 devices which are single ended (one line) but the outputs would swing from +5V to -5V. 

You would probably need to generate some kind of negative power supply to get what you're looking for.

-Bobby

Hi BOBBY sir ,

can MAX889 (negative generator ) and NLVHC1G14DFT1G( inverter) it is possible .

what is exact topology ?

Dear Sir,

i understood following is it work? ,

or can we go ahead with NOT gate and Inverter as follow ,

if yes which NOT ic work on single +5V .

The 74xx14 is called an inverter because it inverts the logic level, i.e., it converts 0 V to 5 V, and 5 V to 0 V. It does not support or generate negative voltages.

You must combine a negative power supply and comparators.

Dear Sir,

I can not get it combining negative power sir .

Use something like the TPS60400 to generate the −5 V power rail. Then use comparators (as in your first circuit).

Dear sir,

what I want is E2 is singe input and i need 2 output V1 and V2 ,is it circuit right .