cdt-3272 1 cdt-3272 p.1 ? + ??y ic a. : (1). ? : 1.5v ? 5.0vdc (2). led ??? {?y?c (3). l1 ? ? (+2sd965 ? ), l2 l3 ? ?? ( ?? led) (4). I (5). ??N@?^x (6). @?^ off r osc P]?b ?ro??y b. : (i). opt1 opt2 opt3 vdd r??N@?? H? (1). opt1 opt3 + vdd (2). opt1 opt2 opt3 + vdd l1 l2 l3 l1 l2 l3 ? off off off ? off off off ? ? W ? off off ? off off ? off W (3). opt3 + vdd (4). opt1 opt2 + vdd l1 l2 l3 l1 l2 l3 ? off off off ? off off off ? ? off off ? off off off off ? off off ? off W ? off W off W off W (5). opt1 + vdd (6). opt2 opt3 + vdd l1 l2 l3 l1 l2 l3 ? off off off ? off off off ? W ? ? W ? W W (7). opt2 + vdd (8). ?? l1 l2 l3 l1 l2 l3 ? off off off ? off off off ? ? off off ? ? off off W off off ? off W ?w??? chip design technology inc. 89 3 8
cdt-3272 2 cdt-3272 p.2 ? + ??y ic c. : limit ? ? min typ max l ? v dd 3 v oB i sb 5 a 3vdc l2,l3 50 ma 3vdc ? led 25 ma 3vdc i op 25 a 3vdc d. pin _ : _ ? i / o ?B f 1 l1 o high/low 2 l2 o open-drain 3 l3 o open-drain led ?_ 4 led o open-drain ??y led 5 key i pull-high Q 6 osci i 7 osco o U 8 vin i ??y? 9 vref i pull-high ?? 10 ps o power_save ? 11 vdd i ?O 12 test1 b y? pin 13 opt1 i pull-low 14 opt2 i pull-low 15 opt3 i pull-low @?^x 16 vss i ??O 17 test2 b y? pin
cdt-3272 3 cdt-3272 p.3 ? + ??y ic ic ??D 16p dip bD l2, l3 Wql? rosc ? ? =3vdc 220k -- 7.5hz 330k -- 5.15hz 470k -- 3.65hz ??y{f : 1. r1 r2 2. rosc=470k ?Ul{ 3. ??yc v t v t x = 0.48v (=in4148 v f /3vdc ? ) ** : ?y?? v t = 2.4v 2.4v x ( ) = 0.48v key r2 r1+r2 r2 r1+r2 140k 560k+140k 14 15 17 test2 opt3 opt2 CDT3272 7 osci 4 led 3 l3 2 l2 1 l1 9 vref 10 ps 11 vdd 12 test1 8 vin 5 key 6 osco 16 vss 13 opt1 470uf ( ) 470k in4148 r1=560k r2 104 2sd965 14 15 opt3 opt2 CDT3272 7 vdd 4 vin 3 l3 16 l2 1 l1 9 osci 10 osco 11 led 12 key chip size 1420 x 1470 m ic vdd 8 test1 5 vref 6 ps vss 13 opt1 ? =CDT3272 osci osco vin key vref led vdd l3 ps l2 test l1 opt1 vss 8 opt2 opt3 16 2 15 3 14 4 13 5 12 6 11 7 10 1 9 3vdc 17 2 test2
cdt-3272 4 cdt-3272 p.4 ? + ??y ic ic ??D 16p dip bD ??y{f : 1. r1 r2 2. rosc=470k ?Ul{ 3. ??yc v t v t x = 0.50v (=in4148 v f /6vdc ? ) ** : ?y?? v t = 4.8v 4.8v x ( ) = 0.48v r2 r1+r2 r2 r1+r2 62k 560k+62k 14 15 17 test2 opt3 opt2 CDT3272 7 osci 4 led 3 l3 2 l2 1 l1 9 vref 10 ps 11 vdd 12 test1 8 vin 5 key 6 osco 16 vss 13 opt1 470uf ( ) 470k in4148 r1=560k r2 104 2sd965 ? =CDT3272 osci osco vin key vref led vdd l3 ps l2 test l1 opt1 vss 8 opt2 opt3 16 2 15 3 14 4 13 5 12 6 11 7 10 1 9 6vdc in4148 14 15 opt3 opt2 CDT3272 7 vdd 4 vin 3 l3 16 l2 1 l1 9 osci 10 osco 11 led 12 key chip size 1420 x 1470 m ic vdd 8 test1 5 vref 6 ps vss 13 opt1 17 2 test2 r4 key r3 r3 r3
cdt-3272 5 cdt-3272 p.5 ? + ??y ic ???r -- ????? , ?? ?_??y?? 30 led 29 l3 28 l2 27 l1 1 key 2 osci 3 osco 4 vin 7 vref 8 ps 9 vdd 20 opt1 21 opt2 22 opt3 23 vss 24 test2 cdt - 3272 470 uf ( ) in4148 2sd965 l1 + - 10 test1 r1 85k r2 100k rosc a : 0 , 0 b : 1320 , 1270 chip size : 1420 x 1470 7230 led vdd vss O??yc v t = 4.8vr y r1/r2 ? = 0.85 r1 v t 470k 1. rosc Ul{ 2. 7230 == cdt7230 ??y ic
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