XR88C681CP Datasheet, PDF (5/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART)

XR88C681
44 PLCC/
LCC
<
40 DIP,
CDP

6
1
/
<
>
6
=
/

>

=




1
<

6

/
1
>
<
=
6

/
28 DIP,
CDIP




1
<
6
/
>
=

Symbol Type Description
,
*
,1
5
*.5
5
*.5

..G
,6
5G.
 99.*
,>
5G.*

1
6
>
07
7

#7
/
<


,/
5G. 




#.
#.
#.
#.
,B

#.
#.
#.
#.

Output 1 (General Purpose Output).  (%  ' %
 -$  + '( %   '(" C
  *
E% $D  *
Output 3 (General Purpose Output).  (%   '
%  -$  + '( %4   C
  *  %
( 5 ''3D  5
*.5"   C
  * '(
 5 ''3D  5
*.5"     $( " '(
 C
 .( $&D  
..G
Output 5 (General Purpose Output Pin).  (%  
( ' %  -$  + '( %    $( "
'("
  * C'( $&D  C'( # 
D ( $('  5G.*. 99.*
Output 7. (General Purpose Output Pin).  (%  
( ' %  -$  + '( %    $( "
'(" C %( $&D ( $('  +
 
* 5G.*
Bi-Directional Data Bus.
Bi-Directional Data Bus.
Bi-Directional Data Bus.
MSB of the Eight Bit Bi-Directional Data Bus.   %+%
  
,  $     3 '   (% %
' %(%( - + ( %   >   % (% (%$    

 (  (% C (- D" !' $( -  #
: '&' (   ?
$
Signal Ground.
No Connect.
Interrupt Request Output (Active Low, Open Drain).
#7 (% %%$    '' ' +     +  
' (H% %3 ( ( - ' $(( %  (% %(-  ( 
( %%$  -    #  (' (   $
(  -$  '   ' $(( % '%( -   # 
E% %  (( $
Bi-Directional Data Bus.
Bi-Directional Data Bus.
Bi-Directional Data Bus.
LSB of the Eight Bit Bi-Directional Data Bus.   %+%
  
,  $     3 '   (% %
  % (% (%$     
 (  (% C (- D" !'
$( -  #
: '&' (   ?$
Output 6 (General Purpose Output).  (%  ( '
%  -$  + '( %    $( " '(
" C %( $&D ( $('  +
 
5G. 
 
6