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  ds2401 ds2400 ??? ??2.8v 6.0v ds2401 ? 1-wire ? 112006 ? 64 ??8 + 48 + 8 crc ???? ? ?? 1-wire ? 8 ds2401 ???? ?????? ?? to-92sot-223 tsoc ? ????? ? ????? ? 16.3kbps to-92 ?? 100mil ( ?) ? (ds2401t-sl) ? pcb ? ? id ? ???? -40c +85c to-92 tsoc package dallas ds2401 top view 3.7mm x 4.0mm x 1.5mm 1 2 3 1 2 3 top view see mech. drawings section bottom view 1 2 01rrd flip chip, top view with laser mark, contacts not visible. rrd = revision/date see 56-g7009-001 for package outline. ? to-92 sot-223 tsoc ?? 1 (dq) 2 (dq) (dq) 3 4 5-6 1-wire dallas semiconductor ??? available evaluation kit available ?????????????? ? ????? maxi m? 1080 0 85 2 124 9 () 1080 0 15 2 124 9 ( ) maxi m?china.maximintegrated.com
ds2401 2 of 10 ? ? ?? ? ds2401 ds2401+ to-92 ? ds2401/t&r ds2401+t&r to-92 ? , ? ds2401/t&r/sl ds2401-sl+t&r to-92 ???? ds2401z ds2401z+ sot-223 ? ds2401z/t&r ds2401z+t&r sot-223 ? , ? ds2401p ds2401p+ tsoc ? ds2401p/t&r ds2401p+t&r tsoc ? , ? ds2401x1 [jp1] ?? , ? ds2401 ???????????????? ???????? 64 rom 48 ?? ? 8 crc 8 (01h) ? 1-wire ????? ??????? ds2401 ds2400 ds2401 ? ds2400 ??? ????? to-92 sot-223 tsoc ???????? ??? ? ds2401 ? rom ??? dallas 1-wire ?? 48 ? 8 8 crc ? 1-wire ??????? ???????? 1-wire ?? 1-wire ??? ???? ds2401 ?? ????????? ? 1-wire ????? ? 1-wire ??????????? ? ??????? 1-wire ??? ?? ds2401 ?? ?? 2 ?? ??? ???????k ??? 3 ????? 5k ? ??? ? 1-wire ??? 1-wire ??? 16.3kbps ?? 1-wire ???????????? ??????????? ? 120 s ??
ds2401 3 of 10 ds2401 ? ? 1 8-bit crc code 48-bit serial number 8-bit family code (01h) msb lsb msb lsb msb lsb ds2401 ? 2 ? 3 a) ? see note see note to data connection of ds2401 b ) ? ttl to data connection of ds2401 ? : ? 1-wire ????? (r pu ) ?? 1.5k ? 5k ?
ds2401 4 of 10 ds2401 1-wire ??? ? rom ? ? 1-wire ?????? reset pulse ??? presence pulse ??? ds2401 ???? 1-wire ?? rom ????? rom rom ?? 8 ?????? 4 read rom [33h] [0fh] ? ds2401 8 ?? 48 8 crc ? ?? ds2401 ??????? ???????? ds2400 ?? ds2401 read rom ? 33h 0fh ?? 64 rom ?? ds2400 ?? 0fh match rom [55h] / skip rom [cch] 1-wire dallas semiconductor i button ? match rom skip rom ds2401 ? 64 rom ???? match rom skip rom ???? 1-wire ???? ds2401 1-wire ? match rom skip rom ds2401 ds1994 ??? search rom [f0h] ????????? 1-wire ??? 64 rom ? search rom ?? 64 rom ? rom ???????????? ?? rom ?? ????? ???? rom ??? rom ? rom ?? ??? 187 1-wire ? ??
ds2401 5 of 10 1-wire ds2401 ??????????? ??? 0 write 0 1 write 1 ?? read data ???? ds2401 ?????? 5 ???? ds2401 ?? rom ? (t x ) ? ( ? 480s ??? ) ???? ?? (r x ) 1-wire ?? 5k ? ?????? ds2401 ? (t pdh , 15-60s) ?? (t pdl , 60-240s) 1-wire ?? 1.5k ? 5k ? k??? / ?? / ???? 6 ????????? ds2401 ?? ds2401 ??????? ds2401 ?????? 0 ? ds2401 ? 1 ????? 1 ds2401 ?????
ds2401 6 of 10 rom ? ? 4
ds2401 7 of 10 ???i ? 5 480 s t rstl < * 480 s t rsth < (includes recovery time) 15 s t pdh < 60 s 60 s t pdl < 240 s resistor master ds2401 ? ??? 1-wire ???? t rstl + t r ? 960 s / ?? ? 6 1 write 1?? 60 s t slot < 120 s 1 s t low1 < 15 s resistor master 1 s t rec <
ds2401 8 of 10 / ?? ( ) ? 6 0 write 0?? 60 s t low0 < t slot < 120 s 1 s t rec < ?read-data?? 60 s t slot < 120 s 1 s t lowr < 15 s 0 t release < 45 s 1 s t rec < t rdv = 15 s t su < 1 s resistor master ds2401 crc ?? ds2401 ?????? crc ? ?? ds2401 8 ??? crc ??? ?? crc ??? crc = x 8 + x 5 + x 4 + 1 dallas 1-wire crc ? ??? 27 ds2401 48 ?????? dallas semiconductor 48 ? 12 ??? ?? id ????????? ?? 1 ???? dallas semiconductor ? ?
ds2401 9 of 10 absolute maximum ratings* voltage on any pin relative to ground -0.5v to +7.0v operating temperature range -40 c to +85 c storage temperature range -55 c to +125 c soldering temperature see j-std-020a specification ? this is a stress rating only and f unctional operation of the device at these or any other conditions above those indicated in the operation se ctions of this specification is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. dc electrical characteristics (-40 c to +85 c; v pup = 2.8v to 6.0v) parameter symbol min typ max units notes logic 1 v ih 2.2 v cc +0.3 v 1,6 logic 0 v il -0.3 +0.8 v 1, 11 output logic low @ 4ma v ol 0.4 v 1 output logic high v oh v pup 6.0 v 1,2 input load current i l 5 a 3 operating charge q op 30 nc 7,8 capacitance (t a = +25 c) parameter symbol min typ max units notes i/o (1-wire) c in/out 800 pf 9 ac electrical characteristics (-40c to +85c; v pup = 2.8v to 6.0v) parameter symbol min typ max units notes time slot t slot 60 120 s write 1 low time t low1 1 15 s 13 write 0 low time t low0 60 120 s read data valid t rdv 15 s 12 release time t release 0 15 45 s read data setup t su 1 s 5 recovery time t rec 1 s reset time high t rsth 480 s 4 reset time low t rstl 480 960 s 10 presence detect high t pdh 15 60 s presence detect low t pdl 60 240 s
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