f-p electronics the FP2800A decoder driver is a 40 pin integrated circuit which provides the decoding to select one of 28 high current driver outputs for sinking and sourcing current. a complementary driver is available for bridge output applicatlons. the cm os compatible data inputs are grouped to allow one of four 7 -segment displays to be add ressed. a data pin sets the output to source or sink moda and the output is activated for the duration ot an enable signal. features: . operates up to 27.3 volts d.c. . source and sink up to 370 ma . law saturation devices . internat clamping diodes for inductive loads . microprocessor compatible inputs applications: . driving 1. (25mm) 7 segment modules for gas pump readouts . driving 1" (25mm) 7 segment modules and 35 disk matrlx xy5 serles modules in panel configurations . driving l' (25m m) 7 segment modules tor parking meter readouts . drivino 1" (25mm) 7 seament modules. 35 disk -. . - mat?x xy5, and 35 dlsk matm xy7 se?es modules for general prlclng and general message applications com 1 40 1d 2 39 1f 3 38 1c 4 37 11 5 36 1a 6 35 ixji) 7 34 1e 8 33 10 9 32 00 10 31 de 11 38 of 12 z3 od 13 28 oc 14 27 . 15 a da 16 25 vcc 17 24 m 18 d ad 111 22 ~ 20 ~ pih assignment (top view) grotji) FP2800A decoder driver recom-ed operating conomoi3s ... iiciriial iiai u3iti l81ic""""""" v.. 4.5 5 u v i'owel 18"" "ita.., v. 2t 17.5 v , ciin8i, l .. m im 0,..11iiii "'" riiii'" . oc diiiy ... i3 iii. clrcalt, i' ig"c z5 ... , i' zi'c . ... li!iitdiiiii fri..-cy i hi abiowte ilaxlmum ra11ngs 3...ic 3r . . '- 11 i.. "hag. .. iv plwlr s1,l, voiiigi v. jiv siw" _at .. l iiiiia oplrlll.1 38mll3rlt1ln ta -48"c lllo"c 2d 2f 2c 2b za vs 2e zg 3g 3e 3f 3d 3c 3b 3a ground e d b1 bo
_ :~~~':'~~t~..,o;~;~~{~~.j,o:,;,:,*~/'~ik' ";~o.<'. . ~~~:t,".,,;;;.;,; . ;:'\~;..i1tr~;~;\~~f..;,;;.; '"o o:'i': :'..'~ . '..,. '.o,:':'f!'~.(;:..i::>:,o:;;;~~'~~o . ':";""":~' . , . ~4:t'~ . ~t:, . 'o "';$ . "",,1~ . "" , ;~~ .. . . '-' . -' . ~:v . ' . ~\ . tt?z ... '. . . ot~~i!0'3~~ . t~;j.~ . ~","'. ",f, , .' ., o .. ;.' ' . . . '. . ' . . . " , "'\o~",ji':(': , ' . - ' j' , - . '; . c . ' ' . ' . "<;";" . . " ~.i . (,t"' . ~' . /~~ . ' , :' ,,"""~~.tk'&':' '(~;',~~~',~':i:'i,fr.d~.~< "'~~...>,: o~:,~1!t.?'.~;.{j:":;';~>';;.:~j:~~';;::o(~. ,;~~:;;::;~~(~::~~~;o~;~.::;~:1t"~, o~:o system timing fig. 1 fot' protectlon 01 the dl.play if the mlcroproc:ea8o3' ahould fall,l3 is poaaiblelo ac couple !he arabie inpul. for a 2 lo 24 ms (max) on tlrna: ra 22 ku c= 0.22 uf the rc network ahould or3y be uaad .a a aafeguard agalnat fallure of the micl'oproc:es- aor. und.r norm.' op83'8t1ng condltlona the enab'e pula. length ahou'd be detennlned by !he mlcropt"ocesaor. world wide i n stal lat 10 n , maintenance and r ~,ccc"l3'~"'co'.,""",..j\l'..", t""'jhr~j~'~~~-"<,,,,,,<,,",~" :': '~ :, r~, :!i~ " : )(' FP2800A truth tarle - ',.,. ,,- 1 . ilj j ..~., """-""".> |
