1/7 2008-09-10 2 states decoder 2 Ba ic en/decode M1DT/ft ?A?w??? mosdesign semiconductor corp. general description ? the M1DT/ft is a cmos asic decoder paired with m1ea. it will de-code serial data from data input. the vt signal will go high and data will be copied to the output if address are ch ecked the same. data output has latch or momentary output type. features a?L ? same rosc matched to the encoder m1ea. ? operating voltage: vdd=2.4 ~ 5.5v ? 2 12 = 4,096 codes, ?0? ?1? binary. ? 3 cycles checked each time. ? address / data types M1DT 4 data type ( latched ). M1DT-m momentary data outputs. m1ft full address type. applications a? ? car/home alarm system, garage control etc.. block diagram ?KD *all specs and applications shown above subject to change without prior notice. ( ?H , ?? ) x a0 a11 vt y di d3 d2 d1 d0 oscillator control input freq divider logic unit control output driver
2/7 2008-09-10 2 states decoder 2 Ba ic en/decode M1DT/ft ?A?w??? mosdesign semiconductor corp. absolute maximum rating (ta=25 ) parameter rating unit supply voltage -0.3 to 5.5 v input voltage -0.2~v dd +0.2 v operating temperature -20 to 70 storage temperature -50 to 125 electrical characteristics characteristics sym. min. typ. max. unit conditions operating voltage v dd 2.4 4.5 5.5 v operating current i op 0.1 1 ma no load quiescent current i sb 0.1 0.5 a output drive current i o 2 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 76 khz external 30%,rosc=240k pin description no. M1DT m1ft description 1~8 a0~a7 a0~a7 2 states address inputs 9 vss vss negative power supply 10~13 d0~d3 a8~a11 data outputs/address inputs 14 di di data input 15 y y oscillator output 16 x x oscillator input 17 vt vt valid transmit 18 vdd vdd positive power supply M1DT/ft a0 vss a1 a2 a3 a4 a5 a6 a7 vdd vt x y d3/a11 d2/a10 d1 / a9 d0 / a8 di 1 18 910
3/7 2008-09-10 2 states decoder 2 Ba ic en/decode M1DT/ft ?A?w??? mosdesign semiconductor corp. timing waveform (1) bit format (2) timing diagram " 0 " " open " 4 words di vt latched d0 ~ d3 momentary d0 ~ d3 te 4 words 4 words M1DT M1DT-m
4/7 2008-09-10 2 states decoder 2 Ba ic en/decode M1DT/ft ?A?w??? mosdesign semiconductor corp. operating flowchart power on stand-by data in ? match previous stored data/add ? n n address matched? n store data/add check completed? vt high data to d0~d3 n
5/7 2008-09-10 2 states decoder 2 Ba ic en/decode M1DT/ft ?A?w??? mosdesign semiconductor corp. reconnended oscillator parameters rosc (k ) M1DT/ft (khz) 75 218 82 199 91 185 100 170 120 142 150 115 180 95 200 86 220 78 270 63 300 57 330 51 360 49 data output m1ea (d0~d3) M1DT/ft (d0~d3) 0 (vss) 1 (vdd) 1 (open) 0 (vss) freq-rosc chart ( vdd@4.5v ) 0 50 100 150 200 250 0 50 100 150 200 250 300 350 400 ros c ( k ) freq ( khz ) M1DT/ft
6/7 2008-09-10 2 states decoder 2 Ba ic en/decode M1DT/ft ?A?w??? mosdesign semiconductor corp. application diagram D (1) data type (2) full address type M1DT a5 a0 a1 a2 a3 a4 a6 a7 vss vdd di x y d3 rosc ir / rf d2 d1 d0 vt 1 18 910 m1ea a5 a0 a1 a2 a3 a4 a6 a7 vss vdd do x y a11/d3 rosc te ir / rf a10/d2 a9/d1 a8/d0 1 18 910 te m1ea a5 a0 a1 a2 a3 a4 a6 a7 vss vdd do x y a11 rosc ir / rf a10 a9 a8 1 18 910 m1ft a5 a0 a1 a2 a3 a4 a6 a7 vss vdd di x y rosc ir / rf vt a11 a10 a9 a8 1 18 910
7/7 2008-09-10 2 states decoder 2 Ba ic en/decode M1DT/ft ?A?w??? mosdesign semiconductor corp. application diagram D (sop package) (1) data type (2) full address type M1DT-s a5 a0 a1 a2 a3 a4 a6 a7 vss vdd di x y d3 rosc ir / rf d2 d1 d0 vt 1 20 10 11 m1ea-s a5 a0 a1 a2 a3 a4 a6 a7 vss vdd do x y a11 rosc te ir / rf a10 a9 a8 1 20 10 11 a11 a10 a9 a8 m1ft-s a5 a0 a1 a2 a3 a4 a6 a7 vss vdd do x y rosc ir / rf vt 1 20 10 11 m1ea-s a5 a0 a1 a2 a3 a4 a6 a7 vss vdd do x y rosc te ir / rf 1 20 10 11 a11/d3 a10/d2 a9/d1 a8/d0
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