LA2351M 92706 / 22806 ms ot b8-6438,b8-5943,b8-5854 no.6955-1/5 LA2351M overview the LA2351M is low-noise transceiver ic for car-lan. either a 5mbps or a 7.5m bps automotive lan can be formed by combining this ic with an automotive lan protocol chip. features ? combining this ic with protocol ic tmc20040c series* for automotive lan can compose an automotive lan. ? supports both 3-bit digital and staircase signals as the input signal. when a 3-bit digital signal cannot be used for wiring runs due to emi considerations, you can provide an r-2r ladder in the vicinity of the protocol chip, use the post-d/a converter signal for the wiring, and connect that signal to the low-pass filter input. ? built-in adjustment-free low-pass filter. ? provides low-noise data communication. *: the tmc20040c series is ic made of smsc japan (standard microsystems kabushiki kaisha). functions transmitter block ? d/a converter (3 bit). ? lpf (for prevention of emi). ? output driver. receiver block ? receiving amplifier. ? noise eliminating lpf (for the receive signal). ? comparator (for waveform shaping). monolithic linear ic for car-lan transceiver ic orderin g number : en6955a any and all sanyo semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose 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.
LA2351M no.6955-2/5 specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max with no input signal 7.0 v allowable power dissipation pd max ta 85c * 500 mw maximum applied voltage v in max v cc v operating temperature topr -40 to +85 c storage temperature tstg -55 to +150 c * mounted on a board : 46.2 25.7 1.6mm 3 , material glass epoxy operating conditions at ta = 25 c ratings parameter symbol conditions min typ max unit recommended supply voltage v cc 5.0 v operating supply voltage range v cc op 4.75 5.25 v v o l low level input 0 0.5 v dac input v o h high level input 2.4 3.3 v v o l low level input 0.5 v transmission control input v o h high level input 2.4 v lpf input amplitude v lpf i 0.45 0.55 vp-p output driver input amplitude v drv i 0.45 0.55 vp-p receiving amplifier input signal amplitude range (differential) v rx i 15 75 mvp-p comparator input voltage range v cpdc i 0 3.5 v comparator input signal amplitude v cp i 0.8 1.2 vp-p operating characteristics at ta=25 c, v cc =5.0v designated test circuit note that this test was made with the ic socket made by yamaichi electrics, ic-51-0302-426. ratings parameter symbol conditions min typ max unit current dissipation without signal i cco with no signal, i 24 +i 1 , pin 25 = 2.4v 35 55 70 ma [d/a converter] output level dac (111); v 28 = 3.3v, v 29 = 3.3v, v 30 = 3.3v (001); v 28 = 0v, v 29 = 0v, v 30 = 3.3v deviation for the output voltage difference of 0.5vp-p -1 0 1 db [lpf] output attenuation att (1) v in 1(pin 26) = 0.5vp-p degree of attenuation of 9mhz for 1mhz 2.5 3.0 3.5 db insertion loss att (2) v in 1(pin 26) = 0.5vp-p attenuation degree of 1mhz signal -1 0 1 db [output driver] output attenuation att (1) v in 2(pin 22) = 0.5vp-p degree of attenuation of 15mhz for 1mhz 0.0 2.0 3.0 db differential amplifier gain att (2) v in 2(pin 22) = 0.5vp-p pin 18 output 1 mhz output level -1.5 0.0 1.5 db [receiver amp & noise filter] frequency characteristics ( 15mhz) att v in 3(pin 15) = 56mvp-p degree of attenuation of 15mhz for 1mhz 2.1 3.0 3.9 db amplifier gain gain v in 3(pin 15) = 56mvp-p pin 15 input gain at 1mhz input 24 26 28 db [comparator] output high amplitude v l pin 3 output dc voltage at i nput pin 5 = 1v 0.25 0.40 0.60 v output low amplitude v h pin 3 output dc voltage at i nput pin 5 = 1v 4.0 4.1 4.2 v notice: apply power supply to 1p in and 24pin at the same time.
LA2351M no.6955-3/5 package dimensions unit : mm 3073c block diagram and test circuit diagram sanyo : mfp30sd(375mil) 1 15 30 16 1.0 15.2 0.4 0.65 10.5 7.9 0.25 (0.6) 2.45max 0.1 (2.25)
LA2351M no.6955-4/5 pin description pin no. pin name pin description pin function remarks 1 v cc 2 comparator power supply 5v (apply pin 24 at the same time.) 2 cpd2 comparator inverted output v o l = 0.4v, v o h = 4.2v (v cc 2 is the maximum voltage for this parameter.) 3 cpd1 comparator non-inverted output v o l = 0.4v, v o h = 4.2v (v cc 2 is the maximum voltage for this parameter.) 4 gnd2 comparator gnd gnd dedicated to comparator. 5 cp1 comparator input (+) 6 nfo noise elimination filter output 7 cp2 comparator input (-) 8 gnd1 gnd system gnd. 9 fcc baud rate setting 5mbps as connected to gnd and 7.5mbps as connected to v cc 1. 10 biasc comparator bias connect to gnd via capacitor. 11 fadj1 fine adjustment of the noise elimination lpf shut-off frequency adjust with a resistor to gnd. standard: open 12 fadj2 fine adjustment of the lpf shut-off fr equency adjust with a resistor to gnd. standard: open 13 gcnt receiving amplifier amplitude adjus tment adjust with a resistor to gnd. (c connection with gnd) standard: 0 ? 14 rxi2 receive signal inverted input 15 rxi1 receive signal non-inverted input 16 bias2 bias voltage 17 bias bias voltage 18 txo2 send signal inverted output 19 txo1 send signal non-inverted output 20 nc2 no connection 21 nc1 no connection 22 drvi output driver input 23 lpfo lpf output 24 v cc 1 power supply +5.0v 5% 25 txen send/receive changeover control l for send and h for receive. (v o l= 0.5v, v o h = 2.4v) 26 lpfi lpf input 27 dao d/a converter output 0.5vp-p 1db 28 txi2 d/a converter input (msb) v o l = 0.5v, v o h = 2.4v 29 txi1 d/a converter input v o l = 0.5v, v o h = 2.4v 30 txi0 d/a converter input (lsb) v o l = 0.5v, v o h = 2.4v
LA2351M ps no.6955-5/5 example of application circuit specifications of any and all sanyo semiconductor products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. 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 high-quality high-reliability products. however, any and all semiconductor products fail with some probability. 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 property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, 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 applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission 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 "delivery specification" for the sanyo semiconductor product that you intend to use. information (including circuit diagrams 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 implied regarding its use or any infringements of intellectual property rights or other rights of third parties. this catalog provides information as of february, 2006. specifications and information herein are subject to change without notice.
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