1 / 7 2004-03-02 3 states encoder 3 oa?s?x ic en/decoder m3eb @?b??a?|3--?q mosdesign semiconductor corp. general description \?-z the m3eb is a cmos asic decoder. it will en-code 12 parallel input and serially transmit them to the output when d0 ~ d3 depressed. paired with either m3d or m3db. these address inputs are 3 states i.e. low(0) ?b open(x) ?b high(1). features 2?~sa? ?e built-in ir carrier : suffix-i. ?e up to 3 10 =59,049 codes, ?0? ?b ?x? ?b ? 1 ? tri-states. ?e single resistor oscillator. ?e data transmit over 30 second auto power off. ?e 2 or 4 direct date transmit ( internal pull-low resistor ). ?e m3eb-2 ?g 10 address ?a 2 data. ?e m3eb-4 ?g 8 address ?a 4 data. applications 2?~3? ?e car/home alarm system, garage control etc .. block diagram \J??1? *all specs and applications shown above subject to change without prior notice. ( hw1q???3w?????| , ??qo3w|?-? ) oscillator control input osc a0 a9 d out freq divider logic unit central output driver carrier ir control d0 d1
2 / 7 2004-03-02 3 states encoder 3 oa?s?x ic en/decoder m3eb @?b??a?|3--?q mosdesign semiconductor corp. absolut e maximum rating (ta=25 j ) parameter rating unit supply voltage -0.3 to 1 5 v input voltage -0. 2 ~v dd +0.2 v operating temperature -20 to 75 j storage temperature -50 to 125 j electrical characteristics characteristics sym. min. typ. max. unit conditions operating voltage v dd 2.4 w 15 v quiescent current i sb w 0. 1 1 g a operating current i op w 0.1 0 .5 ma no load output drive current i o w 2 w ma @v ds =1.2v v ih v dd ?0.2 v dd v dd input voltage v il v ss v ss v ss +0.2 v oscillator frequency fosc w 76 w khz external ? 30% pin description no. m3f description 1~8 a0~a7 3 s tates address inputs 9 vss negative power supply 10~11 a8/d 0 ?a a9/d 1 3 s tates address inputs 12~13 d 2 ?a d 3 direct data transmission enable 1 4 osc oscillator input 1 5 do ut data output 1 6 vdd positive power supply m3e b a0 vdd do ut vss a1 a2 a3 a4 a5 a6 a7 osc a11 / d 3 a10 / d 2 a9 / d 1 a8 / d 0 1 16 8 9
3 / 7 2004-03-02 3 states encoder 3 oa?s?x ic en/decoder m3eb @?b??a?|3--?q mosdesign semiconductor corp. timing waveform (1) b it format (2) timing diagram "0" "open" 1 64 65 192 256 osc 320 448 512 192 clocks "1" 64 clocks 64 clocks 64 clocks 192 clocks 192 clocks 64 clocks 192 clocks 192 clocks 64 clocks 192 clocks 64 clocks 191 321 447 d0~d3 ( m3e,-h ) 1st word 12 bits sync ( m3e,-l ) do te 4 bits 2nd word 4th word sync d0~d3 2 7 12 17 50 150 250 350 450 550 vdd ( volt ) freq ( khz ) 180k 200k 240k 300k 360k 470k 560k 680k 750k 820k 910k m3eb f-v curve
4 / 7 2004-03-02 3 states encoder 3 oa?s?x ic en/decoder m3eb @?b??a?|3--?q mosdesign semiconductor corp. operating flowchart power on stand-by teb depressed? 4 words data transmitted teb still depressed? y n n
5 / 7 2004-03-02 3 states encoder 3 oa?s?x ic en/decoder m3eb @?b??a?|3--?q mosdesign semiconductor corp. reconnended oscillator parameters rosc (k [ ) m3eb/db ( khz) 180 388 200 352 240 294 300 234 360 196 470 152 560 128 680 102 750 94 820 88 910 74 data output m3eb (d0~d3) m3db (d0~d3) x (open) 0 (vss) 1 (vdd) 1 (vdd) power on 0 (vss) 0 100 200 300 400 500 600 700 800 900 1000 0 100 200 300 400 rosc ( ko) freq ( khz ) m3eb/db freq-rosc chart ( @vdd=12v )
6 / 7 2004-03-02 3 states encoder 3 oa?s?x ic en/decoder m3eb @?b??a?|3--?q mosdesign semiconductor corp. application diagram ?|1q??1? a5 a0 a1 a2 a3 a4 a6 a7 vss vdd 1 0 osc rosc m3eb-4 d 3 d 2 a9/d 1 a8/d 0 1 16 8 9 vdd dout ir / rf rosc a9/d 1 a8/d 0 d 2 vss vdd a5 a0 a1 a2 a3 a4 a6 a7 vdd 1 0 m3eb-2 1 16 8 9 d 3 osc dout ir / rf ir o??o?g a9/d 1 a8/d 0 d 2 vss a5 a0 a1 a2 a3 a4 a6 a7 vdd 1 0 m3eb-2i 1 16 8 9 d 3 vdd dout rosc osc ir o??o?g a5 a0 a1 a2 a3 a4 a6 a7 vss vdd 1 0 osc rosc m3eb-4i d 3 d 2 a9/d 1 a8/d 0 1 16 8 9 vdd dout
7 / 7 2004-03-02 3 states encoder 3 oa?s?x ic en/decoder m3eb @?b??a?|3--?q mosdesign semiconductor corp. application diagram ?|1q??1? (sop package) a5 a0 a1 a2 a3 a4 a6 a7 vss vdd 1 0 osc rosc m3eb-4s d 3 d 2 a9/d 1 a8/d 0 1 16 8 9 vdd dout ir / rf rosc a9/d 1 a8/d 0 d 2 vss vdd a5 a0 a1 a2 a3 a4 a6 a7 vdd 1 0 m3eb-2s 1 16 8 9 d 3 osc dout ir / rf ir o??o?g a9/d 1 a8/d 0 d 2 vss a5 a0 a1 a2 a3 a4 a6 a7 vdd 1 0 M3EB-2IS 1 16 8 9 d 3 vdd dout rosc osc ir o??o?g a5 a0 a1 a2 a3 a4 a6 a7 vss vdd 1 0 osc rosc m3eb-4is d 3 d 2 a9/d 1 a8/d 0 1 16 8 9 vdd dout
|
