SM5142AP NPC | Alldatasheet

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Technical content

NIPPON PRECISION CIRCUITS INC Frequency Synthesizer PLL IC OVERVIEW PACKAGE DIMENSIONS The SM5142AP/AM is a 20 MHz frequency synthe- Unit: mm sizer PLL IC, fabricated using NPC’s unique Molyb- . denum-gate CMOS process. It is ideal for tuners that SM5142AM (14-pin SSOP) use double-conversion receivers. JHA AAA A

FEATURES

m= 20 MHz direct frequency division : | u 4 selectable reference frequencies (1, 5, 9 and 10 e) i] kHz) UFEAGE | Ss = Built-in transistor for low-pass filter a —alsuse = 60 kHz and 8 Hz outputs for external application * i = Package ” pO * 14-pin plastic SSOP 5 4112 ==> + 14-pin plastic DIP Gena Joy = Molybdenum-gate CMOS process - 3 caso | } PINOUTS ‘SM5142AP (14-pin DIP) 14-pin SSOP xouTd]1C) 40 XIN ie) 4 Ui Bobo o@ [vss ee —] <I syne] = QQ [aout 3 menG 2 Bas Croup af paraC] © po UA AVAURUROAGRE at) ak = [vo | Wl LEq7 8] FIN las, Lasso ie 14-pin DIP Z XOUT U1 14.) XIN spot] 22 [vss sYCNE} 8 1 aouT TNC] & PAIN eo paraAc] > [bo axq ~& fvpp LeEC]7 8] FIN ce NIPPON PRECISION CIRCUITS—1

VDD # VSS it | ™ SYCN | R DIVIDER Uren XIN & noe R COUNTER 7 AIN | fi m= AOUT DATA fF 3 SHIFT CLK = BDO ; REGISTER LE | PHASE LDo FIN & N COUNTER DETECTOR PIN DESCRIPTION a out Crystal oscillator element and capacitor connection pin. The signal from this pin can be input to a 2nd mixer stage. a 60 kHz controller clock output pin. SYCN N-channel open-drain output. A diode is built-in for electrostatic breakdown protection, so the voltage on this pin should not exceed the supply voltage. 8 Hz time-base clock output pin. 4 TBN N-channel open-drain output. A diode is built-in for electrostatic breakdown protection, so the voltage on this pin should not exceed the supply voltage. a a Programmable divider input pin. A feedback resistor is built-in, and inputs can be coupled capacitively. a 10 Phase comparator output pin. ‘An active filter charge pump circuit is built-in. I Low-pass filter amplifier output pin. ee [ses = emnton 14 Crystal oscillator element and capacitor connection pin. Feedback resistor built-in. a NIPPON PRECISION CIRCUITS—2

Vgs = 0V [rameter mbt Geno Tang vt Supoy vote range a #31088 ipa votage rage [ow fT ~231Ve0 #03 Ro eipatcarenrage | tan [sm AouT oapuvetegerane | Mon | 0310150 Fover dsspaton a Spuaingtonpecrernge [tr fT eT Stowgetompartierange [Te | Sens [| Solin enpeaie a Solin me a

Electrical Characteristics

Vog = 0 V, Ty = -30 to 85 °C a om ‘ereones ee ce ce voltage CLK, DATA and LE LOW-level input y 08 Vv voltage (S re ea a SYCN and TEN LOW-evel output . 410 v votage Noa ta r05mA | - | | a NIPPON PRECISION CIRCUITS—3

[ponorenamneneer eee | = | | ef | [piorewommmmone| ae fats | = | = | » | «| 1. yy = 20 MHz (100 mVrms), 11.16 MHz crystal between XIN and XOUT, all other inputs = Veg, all outputs open.

2.11.16 MHz crystal between XIN and XOUT, all other inputs = Vgg, all outputs open,

Input timing characteristics DATA Vit ‘Vint tsur th ~ CLK Vii - LE Vit —— tur t2 —— a a [paneer 1.11.16 MHz crystal oscilator element. For other crystal oscillator frequencies, multiply the rating shown by (124/fy,4). FUNCTIONAL DESCRIPTION Input Data Data input timing 1i2)314lslo6l7] 8] 9] 10) 1] 12] 13 | 14] 15 | 16 | 17 | 18 | 19 | 20 | MSB TSB LE The 20-bit data is input on DATA with the MSB first. The data is input to the shift register on the rising edge of CLK. Accordingly, data changes should occur on the falling edge of CLK. NIPPON PRECISION CIRCUITS—4

The comparator frequency, reference frequency and all other parameters can be set by the 20-bit input data. The 20-bit data has the following structure. 12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 CC 0 OO OO OO MSB LSB | | BDO Don't Reference Mode Comparator frequency divider output care frequency select divider Bit 1 sets the BDO output. BDO is HIGH when this _ Bits 5 and 6 select the PLL operating mode as shown bit is 1. BDO is LOW when this bit is 0. in the following table. Bit 2 is not used and has no meaning. It can be set to Ce Bits 3 and 4 select the reference frequency divider as > showin in the following table. Santbyreco' | i [oT st | ak | Comparator Frequency f+ [| only and should not be used. frequency! | divider ratio po | o | om | wo | 1. The feedback resistor is open circuit, so FIN goes HIGH and the N ‘counter operation stops. ee ee Bits 7 to 20 set the comparator frequency divider. Bit 7 is the MSB, and bit 20 is the LSB. An example is Po i shown below. 1. 11.16 MHz crystal oscillator 7 8 9 10 MW 12 13 14 15 16 17 18 19 20 CIALLY L LL oY 0) MSB LSB 2120 NIPPON PRECISION CIRCUITS—5

XIN AOUT AIN DO FIN; n n Ss $M5142AP/ AM C xOUT i) Ue CLK DATA LE _—TBN__SYCN NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products contained in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for the use of any circuits shown in this data sheet, conveys no licence under any patent or other rights, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification, NIPPON PRECISION CIRCUITS INC. 3-9, Taihei 4-chome Sumida-ku, Tokyo 130, Japan NIPPON PRECISION CIRCUITS INC, Telephone: 03-5608-5571 Facsimile: 03-5608-5566 NC9414AE 1995.09 NIPPON PRECISION CIRCUITS—6