ver.4 NJW1303 -1- synchronous separator with count down general description package outline the NJW1303 is a synchronous separator performs horizontal and vertical synchronous signal from composit video signals. it contains count down circuit for h,v keeping high sync separation in the weak signal. it is suitable for car navigation and lcd tv. features operating voltage v + =2.7v to 5.3v operating current 5ma typ. at v + =5v output for hd,vd,c sync unnecessary adjustment of oscillation frequency for internal count down circuit internal bgp bi-cmos technology package outline ssop14 pin function, block diaglam 32fh vco v count down phase det v sync sep vs sync in gnd digref c sync out vd hd lpf h count down bgp generator bgp vcc vc c vco out vco filter 2 vco filter 1 14 12 + + + + sync sep reg 1 2 9 10 11 3 13 6 4 8 5 sw 7 NJW1303v
NJW1303 ver.4 -2- absolute maximum ratings (ta=25 c) parameter symbol ratings unit supply voltage v + 8.0 v power dissipation p d 300 mw operating temperature range topr -40 to +85 c storage temperature tstg -40 to +125 c recommended operating condition parameter symbol ratings unit supply voltage vopr 2.7 to 5.3 v electrical characteristics ( v + =5v, ta=25 c) parameter symbol test condition min. typ. max. unit operating current i cc no input signal 3.3 5.0 7.5 ma afc free run frequency f oh measure the input connect to gnd under 300ohm 15.654 15.734 15.814 khz ? f hl 1 miss lock to high frequency +600 +700 - afc lock range ? f hl 2 miss lock to low frequency - -700 -600 hz ? f hp 1 capture from high frequency +600 +700 - afc capture range ? f hp 2 capture from low frequency - -700 -600 hz horizontal output pulse width pwhd 3.5 3.9 4.3 us horizontal output delay tpdh 0.48 0.64 0.8 us horizontal output saturation level volh -0.2 0.1 0.3 v horizontal afc keep limit input v in gm input is color bar of 1vpp,and horizontal signal of 4.8 us pulth width. att less of miss lock sync at valuable of input signal level. - - -20 db bgp pulse width pwgp 3.1 3.6 4.1 us bgp delay tpdg 0.35 0.6 0.85 us bgp limit input v min bgp input is color bar of 1vpp,and horizontal signal of 4.8 us pulth width. a tt less of changeable bgp output a t less of input signal level. - - -17 db 0v 4.8us 286mvpp input signal tpdg pwgp output signal *point1 input signal 4.8us 286mvpp tpdh pwhd output signal volh 0v *point1
ver.4 NJW1303 -3- electrical characteristics ( v + =5v, ta=25 c) parameter symbols test conditions min. typ. max. unit vertical output pulse width pwvd 2.5 3.0 3.5 h vertical output delay tpvd *point 0.47 0.66 0.85 h vertical output saturation level v l vd low level of vertical output - 0.2 0.5 v c.sync output delay tpcs 0.32 0.5 0.64 us c.sync output saturation voltage v l cs - 0.2 0.5 v *point *when measure of pulse timing 50% 50% 50% 50% signal equivalent palse vd output input signal tpvd vertical sync.pulse equivalent palse
NJW1303 ver.4 -4- test circuit *1: csbla503ke5zf10 at murata *2: ntsc/pal sw ntsc : gnd pal :vcc,and 9 to10pin is 360 ohm, 10 to 11pin is 2 k ohm application notes ? the ratio of the vertical synchronous pulse term and the vertical synchronous signal cycle please adjust following expression. the vertical synchronous signal cycle / the vertical synchronous pulse term 75 (see following figure) ? the pulse width of horizontal synchronous signal shall be set 3.7 to 5.7 .s 1k ? tpv ( v cc) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 *1 390 ? 1.8k ? 3k ? 4.7u f 15000p f 1u f 1u f 150p f 1000p f csy ncou t sy ncin vc c v d h d digre f s w vs gn d lp f vcofil1 vcofil2 vcoou t bg p 330p f 360 ? 910k ? *2 100u f 68000p f vertical s y nchronous si g nal c y cle vertical s y nchronous pulse term vertical s y nchronous pulse term
ver.4 NJW1303 -5- equivalent circuit no. name inside equivalent circuit no. name inside equivalent circuit 1 csync. out 10 vco filter 2 2 sync. in 11 vco filter 1 3 vcc 12 lpf 4 5 7 8 vd hd sw bgp 6 13 digref gnd 9 vco out 14 vs vcc gnd 3k 3k 20k vcc gnd 200 vcc gnd vcc gnd 10k vcc gnd digref vcc 200 vcc 200 gnd vcc gnd 200
NJW1303 ver.4 -6- memo [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
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