n2206 ms ot b8-4988 no.a0260-1/7 any and all sanyo semiconductor products described or contained herein do not have specifications that can handle applications t hat require extremely high levels of re liability, such as life-support systems, aircraft?s control systems, or other applications w hose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo semiconductor representative nearest you before using any sanyo semiconductor products described or contained herein in such applications. sanyo semiconductor assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo semiconductor products described or contained herein. LA7958 overview this LA7958 is a audio/video switch for tv, vtr. functions ? audio: possible to change 4 channel 2 ? video: possible to change 4 channel, 6db amplifier, y+c amplifier specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc v max pin 8 13.2 v allowable power dissipation pd max ta 70 c 300 mw operating temperature topr -20 to +70 c storage temperature tstg -55 to +150 c operating conditions at ta = 25 c parameter symbol conditions ratings unit recommending operation voltage v cc pin 8 9.0 v operating voltage range v cc op pin 8 8.0 to 12.0 v orderin g number : ena0260 monolithic linear ic for tv, vtr audio/video switch
LA7958 no.a0260-2/7 electrical characteristics at ta = 25 c, v cc = 9v ratings parameter symbol conditions min typ max unit current dissipation i cc v cc = 9v, no signal 11.2 14.0 16.8 ma audio block audio input dc voltage ina 4.0 4.3 4.6 v audio output dc voltage oa 3.2 3.6 4.0 v audio channel bandwidth fa -3db frequency 100 khz audio signal voltage gain aa f = 1khz, v in = 500mvrms 5.0 6.0 7.0 db audio input dynamic range da f = 1khz, thd 1% 2.0 2.5 vp-p audio channel psrr psa v cc = 9v+1vp-p, sine wave (50hz) 35 50 db audio channel input impedance ria 80 100 120 k ? audio channel output impedance roa 40 50 65 ? audio channel crosstalk cta f = 1khz 65 80 db audio channel s/n sna filt er = din/audio 70 85 db audio channel thd thda f = 1khz, v in = 500mvrms 0.15 0.3 % video block video input dc voltage inv 4.0 4.3 4.6 v video output dc voltage ov 3.2 3.6 4.0 v video channel bandwidth fv -3db frequency 10 mhz video signal voltage gain av f = 500khz, v in = 1vp-p 5.0 6.0 7.0 db video input dynamic range dv f = 100khz, thd 1% 2.0 2.5 vp-p video channel psrr psv sine wave (50hz) 35 50 db video channel input impedance riv 8.0 10 12.0 k ? video channel output impedance rov 29 37 48 ? video channel crosstalk ctv f = 3.58mhz, v in = 1vp-p 45 60 db video channel noise snv bandwidth 10mhz 57 62 db y, c mixer y input dc voltage iny 4.0 4.3 4.6 v c input dc voltage inc 4.0 4.3 4.6 v y+c signal voltage gain ayc yin = 1vp-p, cin = 0.3vp-p 5.0 6 7.0 db differential gain dg 2.0 3.5 % differential phase dp 1.0 2.0 deg mode selection block mode selection threshold voltage vmth 2.2 2.6 3.0 v
LA7958 no.a0260-3/7 logic true table video-output c : pin 15 a : pin 11 b : pin 13 l open h l l vtv vtv vtv h l v1 v1 v1 l h v2 v2 v2 h h y+c v3/y v3/y vtv = (-a)*(-b) v1 = (a)*(-b) v2 = (-a)*(b) v3 = (a)*(b)*(-(c=l))/y=(a)*(b)*(-(c=l)) y+c = (a)*(b)*(c=l) audio-r-output c : pin 15 a : pin 11 b : pin 13 l open h l l rtv rtv rtv h l r1 r1 r1 l h r2 r2 r2 h h r3 r3 r3 rtv = (-a)*(-b) r1 = (a)*(-b) r2 = (-a)*(b) r3 = (a)*(b) audio-l-output c : pin 15 a : pin 11 b : pin 13 l open h l l ltv ltv ltv h l l1 l1 l1 l h l2 l2 l2 h h l3 l3 l3 ltv = (-a)*(-b) l1 = (a)*(-b) l2 = (-a)*(b) l3 = (a)*(b) package dimensions unit : mm 3010a sanyo : dip22(400mil) 27.2 1.2 0.25 10.16 8.6 0.9 2.54 4.25 3.1 4.95max 0.51min 0.5 1 11 22 12
LA7958 no.a0260-4/7 pin assignment block diagram
LA7958 no.a0260-5/7 no. parameter explanations test circuit 1 video signal voltage gain (av) p : pins 7, 9, 12, 19 q : pin 16 v in = 1vp-p input inpedance 75k ? av = 20 log vout/v in (db) 2 video channel bandwidth (fv) p : pins 7, 9, 12, 19 q : pin 16 v in = 1vp-p a frequency which becomes -3db is measured. 3 video channel noise (snv) p : pins 7, 9, 12, 19 q : pin 16 4 video channel crosstalk (ctv) p : pin 7 (pins 9, 12, 19) o : pins 9, 12, 19 (pin 7) q : pin 16 5 video channel psrr (psv) pin 8, f = 50hz v in = 1vp-p p : pins 7, 9, 12, 19 q : pin 16 6 audio signal voltage gain (aa) p : pins 1, 2, 3, 4, 5, 6, 21, 22 q : pins 17, 18 v in = 500mvrms aa = 20 log vout/v in (db) continued on next page.
LA7958 no.a0260-6/7 continued from preceding page. no. parameter explanations test circuit 7 audio channel bandwidth (fa) p : pins 1, 2, 3, 4, 5, 6, 21, 22 q : pins 17,18 v in = 500mvrms a frequency which becomes -3db is measured. 8 audio channel thd (thda) it's the same audio signal voltage gain measurement circuit. 9 audio channel s/n (sna) p : pins 1, 2, 3, 4, 5, 6, 21, 22 q : pins 17, 18 10 audio channel crosstalk (cta) p : pins 2, 3, 4, 5, 6, 21, 22 q : pins 17,18 11 audio channel pssr (psa) pin 8, f = 50hz v in = 1vp-p p : pins 1, 2, 3, 4,5, 6, 21, 22 q : pins 17, 18
LA7958 ps no.a0260-7/7 test circuit ? specifications of any and all sanyo semiconductor products described or contained herein stipulate the performance, characteristics, and functions of the described pr oducts in the independent state, and are not guarantees of the performance, characteri stics, and functions of the described products as mounted in the customer's products or equipmen t. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. ? sanyo semiconductor co., ltd. strives to supply hi gh-quality high-reliability products. however, any and all semiconductor products fail with some probabilit y. it is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other proper ty. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measur es include but are not limited to protective circuits and error prevention circuits fo r safe design, redundant desi gn, and structural design. ? in the event that any or all sanyo semiconductor products (including technical data, services) described or contained herein are controlled under any of applicab le local export control laws and regulations, such products must not be exported without obtaining t he export license from the authorities concerned in accordance with the above law. ? no part of this publication may be reproduced or tr ansmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, of otherwise, without the prior written pe rmission of sanyo semiconductor co., ltd. ? any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the "d elivery specification" for the sanyo semiconductor prod uct that you intend to use. ? information (including circuit diag rams and circuit parameters) herein is for example only; it is not guaranteed for volume production. sanyo semiconductor believes information herein is accurate and reliable, but no guarantees are made or imp lied regarding its use or any infringements of intellectual property rights or other rights of third parties. this catalog provides information as of novemver, 200 6. specifications and inform ation herein are subject to change without notice.
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