SM5124A NPC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 5

Technical content

NIPPON PRECISION CIRCUITS ING. CB Transceiver PLL elaine ee ee @ OVERVIEW The SM5124A is a PLL LSI for 40-channel CB transceivers with US specifications using NPC's original molybdenum-gate CMOS technology. Incorporating a high-speed programmable counter for direct division of 27 MHz-band frequencies, the SM5124A eliminates the need for a transmission mixer and simplifies the external circuits. ™ FEATURES + 27 MHz direct dividing + Built-in inverter for active filter + | crystal PLL synthesizer + Built-in 10.24 MHz quartz crystal oscillator circuit + Built-in 40-channel transmission/reception _+ Supply voltage 5.7 to 6.3 V code ROM + 18-pin plastic DIP + Built-in mis-program detection circuit * Molybdenum-gate CMOS construction + Digital lock detector @ PINOUT (TOP VIEW) ml PACKAGE DIMENSIONS (Unit: mm) C7 . 22.9MAX. Ow Yt 18 |} Vss Qovr JJ > pf pp ooo oad V; an -@-|| S 8 ee ge is te hai) tT aan pr a E 2 po { = [] P4 a ea a g BG oes 15 3 38 fo G+

40 J }G O rz 3 8

a TR Uf oO fp TARA le Fy (9 101] Po Ey S 4 A 3 ™@ BLOCK DIAGRAM 254408b I Hoi g 3 [5] po o ftp FR PHASE [6] ar Qovr compa- | .\\/ RATOR: ° ne ° LO = gt DETECT PTET pe ea : TR Ven fy) 3] fd fs} hig : PO Pl P2 PS PA PS PE PT ss Vop a i NIPPON PRECISION CIRCUITS 93

[1 [| Qw | Intemal quartz crystal oscillator circuit. Internal feedback resistor. 2 | Qour | [Lp [UNLOCK signal output. Unlocks, Lecks SSCS [5 | DO __| Phase detector output. Charge pump circuit for active filter | 6 | Al __| Amplifier input and output for active filter TR | Transmission/receiving switching input. Internal pull-down resistor. H: transmission, L or open: receiving [9 | Fw _| Programmable counter input. Internal feedback resistor [10 | PO | Channel switching inputs. Internal pull-up resistor i [11 | Pi __| Inputcode is 2-digit LED display code. [12 | P2 | Whensegment A of the unit digit is expressed 1A and segment C of the 10's digit is 2C, connections are [13 | P3 | madeas shown below. ce | POM IR PleIA PIG [is [ps] BBE PhD P59 a ee )7 [er | A | MTYPICALAPPLICATION | to2418Miiz DET AF 2nd Oo a L\\iF Qn Vss (Gs) rT Gor PT Vpp PE LD PS /\\ ist (WW Do PA Al P3 © mF T/R Pl Fn PO L\\ RF i, TX/RX “\\ ° CHANGE RX : 16.273~16.713MHz TX : 26,965~27.405MHz Wie et ann Poo ee COR 4 rrr CODE _SWICH

94 NIPPON PRECISION CIRCUITS

j

™ ABSOLUTE MAXIMUM RATINGS (Vss=0V) {Operating temperature |" Tora [" -30t0+80__ [°c _| [Soldering time [tuo TT See | @ ELECTRICAL CHARACTERISTICS Ta = -30 to +80 °C, VDD = 5.7 to 6.3 V, Vss = 0 V and QIN = 10.24188 MHz/ 1Vp-p/sine wave unless otherwise specified. [Supply voltage | Voo _[Fivn27-405MHz/IVpsisine wave | 57 | 60 [63 [| v [| | (Current consumption Fix=27.40SMHz. 1 Vp-s/sine wave, 25 | mA |Al=1/2Vpo Excluding pull-up/down resistor current Wasim operaing | Tass [FaeIVppsine wave «30 | | |Ppin | eager [ra fomsrvepane wave [isto J [input vohagerange [Vac] [Yh] Vn [Fn Ow pin | Input voltage ee Tver in Input current Tul | Vpo=6.3V, Vine6.3V [ [| [| 20 | pA [Fwpin | TH [P00 uk in| [m2 | [20 uA [Qu pin | a ee Op suo | Yel Worav [24 _[ 30 [36 [Vv Txpin | Vie [2a[30 136 Jospin | a: a Vi04 [se [| Tv [po=r7Pin | ‘Output current Tou! _ | Voo=5.7V, Von=5.3V, Al=Vss [o4 | |_| mA [LD,DOpin__| Tod a Lia [Pe Neesae Fe} ae fro Tod fio [| [mA [AOpin | Leak current Vp0=6.3V, Vine6.3V, Tam25°C [| __[ 100 | nA [DOpn ee Piao eve Fe “tro far —J Tu2 ee ™ DISPLAY FONT NIPPON PRECISION CIRCUITS 95

™ CODE ROM The code ROM stores coded data on 40 channels each for transmission and reception. PO to P7 and T/R pins are used to switch channels. A two-digit LED display code is input to PO to P7. Segment signals corresponding to PO to P7 are shown below. 2A 1A | —_ | ) PO veecdF PA seed 2F 2B iF 1B

26 Is PLoverA | PB sere-2C

| | | PQ vee1G PE re 2A 2E 2c 1E 1c beseee beceee 2p | P3 1E PT 2F "L" or "OPEN" at the T/R pin indicates receiving, and "H" indicates transmission. The T/R , pin is connected to an internal pull-down resistor. If data other than 1 to 40 channel codes is input to PO to P7, the LD pin goes "L", and the phase detector stops operating at the same time. m™ PHASE DETECTOR AND LOCK DETECTOR The phase detector compares the reference frequency divider output FR with the program- = mable counter input frequency divider output FV, then generates the VCO control voltage. The phase detector also generates the LO signal with a time width equal to the phase differ- ence between FV and FR, then inputs the signal to the lock detector. When the LO signal is 1.6 ps or longer, the lock detector judges that the PLL is unlocked and brings the LD pin "L". The LD pin goes "H" 4.8 ms +10% after the LO signal becomes 1.6 ps or less. + Phase detector + Unlocking due to external instability — --Trw te <16us LO ee LD + Unspecified input code . Locking i 410% when TRWS1.6 Hs. ee CODE l b—— Trp —— LD es ne XTLp = 4.8ms + 10% a

96 NIPPON PRECISION CIRCUITS

  • FVCO = 0.010001839 x N (MHz) Ghannet |2A]28 [2c Jap [28] 2F [2c Tia Tip fic [ap Par [iF [iG | TIREL reception [T/R=H transmission | [ref fest [fer] [et | Testrs|pofpo[ w [rvco [NT Fvco | [a Jaya [a Te {alata Tact a yaa i627 [16273 [2696 [26.965 | ER PE [4 HTH Te ata TH TATA CTA Ce esr [313 [2700 J 27.005 | a A [HTH Ta THA a ate eee ele [ese [363 [270s [055 | [Hea AAA Taye yey atay ee] ie37 [373 [2706 [065 | (io [HP Cye ya Taya Taye yey yey ey eye [tess [ses [2707 [07s | a a RR a [as THT Ce a{H {ata Teva yey yay eye [esa [aes [org [35 | t [is THT tfc tata aaa Ta Tee yey [tose [aos [aris [ss | wv TA{ tee [ayaa epee aya yaa] esr (ara [aie [165 | mw [AT CPe HTH Tate ep eye yey epee [ies [aes [ani fs | (is [Hele teeta Te [eye ye yaya] ele [io [ass [ois [8s | (20 [ete ta {eee eye yey ey eye ye [aT iosr sis [2720 [20s | TO a a EZ a [26 [ete fa teeta {eye yee yey eye [esr P53 [2726 [265 | a [2s [tpe lH {ect a {eye yey ey e(e ele 7 i659 [ss [ame [285 | [2% [ulelHfeyeta {eet ey yaya] ete | isco [eos [2729 [295 |

30 Pepele {et yaya fete yey ey ey ey [a | ior [ois [2730 [30s |

a a a Ea perce repeperc para rere rere re ar [73 | 2736 [365 | EA a A a [oo TaTeTeqetateyeyevey ey eet fay en [m3 [2740 [40s * Channels (1 to 40) are selected based on the states of signals (PO to P7) in bold letters. NIPPON PRECISION CIRCUITS 97 j