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CMOS Dual Channel UARTMaker : Exar Corporation Datasheet PDF : XR68C681.pdf Shortcut : XR68C681 |
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www.DataSheet4U.com XR68C681 FEATURES !" # $ $ % %& ' % '( $ %( )$*++$ '(" *++$ %( ,- *(% ( ./ *( # ' % # *( 0 % ( 1 (++ *( % # $ $ *( '( + 2' %( $ '( 2! '3 ((& !( *( 4 5 '3 .%" /5 '3 67.% 8" 29" :' :,* 7 $ :,* 7 $% (+ '( / *( .( # ( 2(- %3 # $(( % # ;' '3 $- < 0 ,% % / 0 ,% # % ( - + % '% # % ' ( %'( + &% $& $ $' ( - , ( ( /< $ (- (' / ('% $ '$ : , ' -& APPLICATIONS ($( &%% ( ,., ( 2 + $ ('( &%% GENERAL DESCRIPTION 25 (% %& ' % '( $ %( (% $ ' ('( % $(' ($% +& ( $ $ + $! %& ' % ' ('( % ' % ( %( - '3- (% $%(- $ + % ( (''%% %$ %&%% $ & %$ ( $ ( $( ( 5/</< $(' ++% %( - # %( + /< +(& + (''%%% (% +('$ %( - $ '$ & " ( (- + ' $ %(& 2,#. < '%% ($ (- + ' $ ' %( " $ (% '3-$ ( = ( #, == ( ,: ORDERING INFORMATION Part No. 5/</<> 5/</<> Pin Package == ,: == ,: Operating Temperature Range ?@ = ?<6 Part No. 5/</<8 5/</<, 5/</<, Pin Package = #, = ,#, = ,#, Operating Temperature Range = ?<6 ?@ = ?<6 XR68C681 5 5 5* 5* #, #,6 , ,@ #, - + '% #, # , , 9 9 9 9 , '( ' :-(' $ -(%% % -(% $ -(%% % -(% * , , # *% ( * # #; # (( * *( 0 .( %'( *% *++ $ '$ $$%% '$ # # @ = .A 7 22 # 7 #8 5.:7 5 ( $('% 8 '( #:<<1 ,$' Figure 1. Block Diagram of the XR68C681 DUART Device XR68C681 PIN CONFIGURATION # 7 #,1 #, 1 = #, .A8 78 5* 5* , ,1 ,6 ,@ 1 6 @ 08 == ;'' =1 #,= = #,6 6 #, = #, 8 1 #,1 1 1 = 6 / @ < 1 = 6 / @ < = 1 1< 1@ 1/ 16 1= 11 1 1 1 < @ / 6 = 1 = #, .A :7 5* 8 5* , ,1 ,6 ,@ @ < 1 = 6 / @ 1 6 < 1 1< 22 1@ 5 1/ 16 1= 11 1 1 5.:7 5 XR68C681 XR68C681CJ 8 5 , , 1 ,= ,/ = / < @ @ 8 1 44 Pin PLCC #8B = 08 / 6 '' #,= #,6 # 7 #, 22 5 5.:7 5 5 , , ,= ,/ = / #8 = / = 40 Pin PDIP, CDIP (0.600”) PIN DESCRIPTION Pin Number (44 pin PLCC) Pin Number (40 pin DIP) 8 # No Connect. LSB of Address Input. (% ( " - ( $$%% ( %" = %$ %' '( -(%% ( ( $(' $( $ $ ( ( % ( , Input Port 3. 0 % ( ! ''3 ( + %( 5 Address Input. Input Port 1. 0 % ( (% ( ' ' +(-$ '( * $ # * Address Input. MSB of Address Input. (% ( " - ( $$%% # %" 1 %$ %' '... |
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