LC7252(5 DIGIT FREQUENCY DISPLAY WITH CLOCK=™FLUORESCENT DRIVER)VDD VSS Vref PM bi ci az b2 cz d2 e2 2 92 a3 b3 c3 d3 e3 13 93 ae be co de es fe Je GSb&eSaccu neces ssacecceeesecamySEGMENT ORIVERME EES ME Ee ee ERE EEEMULTI-PLEXERMONTH/DATE STOPWATCH COUNTERL LATCHfC tfFtTFETFETEFREQUENCY COUNTER>Vaceeey eee1}f= IF FREQUENCY CONTROL| =TIMING ca>,| centro | IF FREQUENCY FINE ADJUSTER==ed{FFM 1F-AM1SIS 1SISIeISIS ,S|SISISferaiipegaeséae FS GEESE BERSLA1240(AM TUNER SYSTEM)CON-OUT2RF-OUT CON-IN VCC ; CON-OUT IF-IN IF-OUT! IF-IN2 vccRF-CON2 SUB SiMre-conif? | [16}RF-CON2RF-1N2[2 | 115}S/Mvec[3| [14JAGcRre-our [4] HSpIF-INZcon-ouT (5| fr2}tF-OUTcon-our2[6 | farjvccCON-IN fojsue1F-INf@| [9}IF-our?(TOP VIEW)DS 8629 (135MHz DIVIDE-BY-100 PRESCALER)”ECL &TLL.,VCCI{ECL) vCC2(TLL))z!FIN O~ BUFFER/ = ECL | ECL TO TTL is USTTL = LSTTL(6)—-| AMPLIFIER OUNTER TRANS LATOR COUNTER | COUNTERian GNDIKECL) GND2{TTL) BIASvec2Tiey{ + | [8 }vccicecL)out-Put[2 | FINGND2( TTL) | FINGNDKECLSS | Bias{Top vIEW)—~38-—