XR88C681CP Datasheet, PDF (7/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART)

XR88C681
44 PLCC/
LCC
1=
40 DIP,
CDP
1<
1
16
<
1/
<
1>
<
1>
<
1=
<
1=
<1
1
<1
1
<<
<
28 DIP,
CDIP
6
/
>
=
Symbol Type Description
22


#,

..25
#,/
5
*
#
:
#,6
5
*
#2
?$
#,<
5

#2#
?$
;


#
#
#
#
#
#

#
#
,B
Master Reset (Active High). %%( -  (% (  '% ( 
  -(%%" " #" #" ," ,
"  $ ( (((I%
  #;   / %%( -  (% (  % %%  
 .
(" % ,  ,> (   (- %"  $ '% 
%( '  % (   ( '( % ( 5  $ 5*
% 3( -  (- 
Chip Select (Active Low).   $ % (% (%$  

 (% C (- D   %+%   
,  $  
  (   >   $   
 (% CD
Input 2. (General Purpose Input).  (% (  ( ' %
 -$  + '( %   C
 .( ! 
''3D (  
..25
Input 6 (I-Mode). 0  ,% #  (   (% (  (
' %  -$  + '( %   2!  '(

'3 +
  * 5
*
Interrupt Acknowledge Input (Z-Mode). '( 9
 (% (  (%  
,H% % %    #  E%
(%%$ &     $(' B   
, %%%  (%
( " ( ( $('%      H% (  E% (% 
  %('$"  $     & ! '&' (   # 
 '3 $-
&'     ( % $   

,H% #  '3 $- & '( -   '  % +  
#  ;' -(% #;    $ %   >
Input 5 (I-Mode). 0  ,% #  (   (% ( '
%  ' +(-$  + '( %   !  ''3 (  +
   %( +
  * 5
*
Interrupt Enable Output (Z-Mode). '( 8(- 
 (%  ( (% & C (- D 8" (  +  
+( -  ' $(( % ' '%  (%  (   
-$ --$ CD
 #+   #2# #  2  #  ( (% CD #+ #2 (%
CD '% +   #2# ( " #2 ( -- C (- D  '
  #2# % --$ C (- D
     % (%%$  #  E%   
,
#7 ( (% --$ CD #+ #2 (% CD '%  
  % E%$  # "   #2 ( (
CD"  -    #  (' ( "  (  

, % ( 3$   CD ' $
Input 4 (I-Mode). 0  ,% #  (   (% (  (
' %  ' +(-$  + '( %   !  ''3 ( 
+   '( +
  5

Interrupt Enable Input (Z-Mode). '( 8(- 
#+  (% '( (- (  (%   -(' C (- D"     (% '
 + - ( -   %3$ #  E%%   

, #+  (% (  (%   -(' CD"     (% ( (($
+ - ( -  & #  E%%   
,
Most Positive Power Supply.
 
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