XR68C681 Datasheet, PDF (3/75 Pages) Exar Corporation – CMOS Dual Channel UART (DUART)

XR68C681
PIN CONFIGURATION
= @
#, <
.A 
 :7 
5* _
8
_
5* _1
, =
,1 6
,6 /
,@ @
XR68C681CJ
1

1< 22
1@ 5
1/ 5.
:7
16 5
1= 8

11 5
1 ,
1 ,
1 ,=
 ,/
 ^
#,1 ^
 1
#, =
1 6
= _/
#, @
.A8 <

78 
5* 
5* 
, 
,1 1
,6 =
,@ 6
 /
1 @
6 <
@ 
08 ^
XR68C681
= _''
1 _#,=
1< #,6
1@ #
7
1/ #,
16

1= 22
11 _5
1 5.
:7
1 5
1 5
 ,
< ,
@ ,=
/ ,/
6 
= 
1 =
 /
 _#8
44 Pin PLCC
40 Pin PDIP, CDIP
(0.600”)
PIN DESCRIPTION
Pin Number Pin Number
(44 pin PLCC) (40 pin DIP)



1

=
1
6
=
/
6
@
/
Symbol
8


#,1
5


#,

*
1
=
Type Description
No Connect.
# LSB of Address Input.  (% ( "  - ( $$%% ( %"   =
 %$  %' '( -(%% ( (     $(' $( -
$  $ ( ( % (  
,
# Input Port 3. 0  % (     !  ''3 (  +

   %( 5

# Address Input.
# Input Port 1. 0  % (   (% (  '  ' +(-$ 
   '(
  *
 $ #  
*
# Address Input.
# MSB of Address Input.  (% ( "  - ( $$%% # %"  
1  %$  %' '( -(%% ( (     $('
 
1