1/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. sound processors for home theater systems 6ch / 9ch stereo input selectors bd3843fs,bd3841fs description bd3843fs is a function switch ic with two 6ch (9ch for bd3841fs) inputs. it can independently control outputs of 2 systems: 2ch rec output (3ch for bd3841fs) and 1ch line output. therefor e, it is can be used for 2nd room entertainment and 2nd source recording. bd3843fs has excellent cross-talk characte ristics between channels and selectors. low distortion, and low noise are realized by a basic pattern layout. features 1) 2 room entertainment / 2 source recording. 2) 6ch volume lsi bd3813ks/bd3815ks can be controlled simultaneously by the serial control bus. 3) 7ch volume lsi bd3816k1, bd3817ks with bd3843fs can be controlled simultaneously by the serial control bus. 4) 14ch input is available by combining 2chips (bd3843fs and bd3841fs). 5) excellent cross-talk characteristics between channels by basic pattern layout. 6) built-in buffer amplifier. 7) 2-line serial control bus (for both 3.3v and 5v). 8) operated by single and dual power sources. applications av receivers, home theater system s, mini-audio systems, and tvs. product lineup parameter bd3843fs bd3841fs input selector 6 9 rec output 2 3 package ssop-a24 ssop-a32 absolute maximum ratings (ta=25 ) parameter symbol ratings unit power supply voltage vcc 7.5 *1 v vee -7.5 input signal voltage vin vcc+0.3 vee-0.3 v power dissipation pd 800 (bd3843fs) 950 (bd3841fs) *2 mw operating temperature topr 20 +75 storage temperature tastg 55 +125 *1 even in the specified range of power supply voltage, applying voltage only to the vcc side may cause an excessive current may ca use permanent damage to the ic. when starting up power supplies, vee and vcc should be powered on simultaneously, or vee first followed by vcc. *2 reduced by 8 mw/ over 25 (bd3843fs), when installed on the standard board (size: 70 x 70 x 1.6mm). reduced by 7.7 mw/ over 25 (bd3841fs), when installed on the standard board (size: 70 x 70 x 1.6mm). no.10081eat07
2/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note bd3843fs,bd3841fs operating range must function normally at ta = 25 , part no. parameter symbol ratings unit min. typ. max. bd3843fs action power source voltage (both power sources) vcc 4 7 7.3 v vee -7.3 -7 -4 action power source voltage (single power source) vcc- vee 8 14 14.6 bd3841fs action power source voltage (both power sources) vcc 5 7 7.3 v vee -7.3 -7 -5 action power source voltage (single power source) vcc- vee 10 14 14.6 electrical characteristics ta = 2 5 , vcc=7v, vee=7v, f=1khz, vin=1vrms, rl=10k , rg=600 , unless otherwise noted. parameter symbol limits unit conditions min. typ. max. circuit current vcc iq D 3 10 ma no signal vee -10 -3 D output output voltage gain 1ch gv1 -2 0 2 db output voltage gain 2ch gv2 -2 0 2 db total harmonic distortion ratio 1ch thd1 D 0.004 0.05 % bw=400 30khz total harmonic distortion ratio 2ch thd2 D 0.004 0.05 % bw=400 30khz maximum output voltage 1ch vomax1 3.4 4.2 D vrms thd=1% maximum output voltage 2ch vomax2 3.4 4.2 D vrms thd=1% output noise voltage 1ch vno1 D 1 5 vrms rg=0 , bw=ihf-a output noise voltage 2ch vno2 D 1 5 vrms rg=0 , bw=ihf-a cross-talk between channels 1ch 2ch ctc12 D -95 -80 db rg=0 , bw=ihf-a cross-talk between channels 2ch 1ch ctc21 D -95 -80 db rg=0 , bw=ihf-a cross-talk between selectors 1ch cts1 D -95 -80 db rg=0 , bw=ihf-a cross-talk between selectors 2ch cts2 D -95 -80 db rg=0 , bw=ihf-a rec output r voltage gain 1ch gvr1 -2 0 2 db rl=47k ? , r voltage gain 2ch gvr2 -2 0 2 db rl=47k ? , r total harmonic distortion ratio 1ch thdr1 D 0.01 0.09 % rl=47k ? , bw=400 30khz r total harmonic distortion ratio 2ch thdr2 D 0.01 0.09 % rl=47k ? , bw=400 30khz r output noise voltage 1ch vnor1 D 1 5 vms rg=0 , bw=ihf-a r output noise voltage 2ch vnor2 D 1 5 vms rg=0 , bw=ihf-a r output impedance 1ch routr1 D 50 100 ? r output impedance 2ch routr2 D 50 100 ? * note: this ic is not designed to be radiation-resistant.
3/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note bd3843fs,bd3841fs timing chart 1. signal timing standards ? data is read at the rise of clock. ? latch is read at the fall of clock. ? end latch signal at low. * to avoid malfunctions, clock and data signals must terminate with the low state. 1byte=17bit fig.1 parameter symbol limit unit min. typ. max. minimum clock width twc 2.0 s minimum data width twd 2.0 s minimum latch width twl 2.0 s low hold width twh 2.0 s data setup time (data clk) tsd 1.0 s data hold time (clk data) thd 1.0 s latch setup time (clk latch) tsl 1.0 s latch hold time (data latch) thl 1.0 s latch low setup time ts 1.0 s latch low hold time th 1.0 s 2. voltage standards of control signal parameter conditions limits unit min. typ. max.( Qvcc) ?h? input voltage vcc=5 7.3v vee=-5 -7.3v 2.2 5.5 v ?l? input voltage 0 1.0 v cl clock da data latch thd thd th ts tsl thl tsd twc twh twd twl tsu data data latch 90 90 90 90 10 10 10 90 90 90 90 90 10 10 10 twc finish at low
4/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note bd3843fs,bd3841fs 3. control data format list (1) bd3843fs control data format data input direction msb lsb data d16 d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 input function 1 input function 2 reca 0:off 1:on recb 0:off 1:on * 0 0 0 select address (2) bd3841fs control data format data input direction msb lsb data d16 d15 d14 d13 d12 d11 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 input function 1 input function 2 reca 0:off 1:on recb 0:off 1:on recc 0:off 1:on * * * 1 0 1 *:don?t care. (ex.) data input direction msb lsb data l "l" represents latch.
5/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note bd3843fs,bd3841fs block diagram, application circuit 1)bd3843fs) (both power sources) fig.2 2)bd3841fs (both power sources) fig.3 unit resistance capacitor f * f-sw1 input function1 f-sw2 input function2 30 29 31 32 24 23 2526 2728 18 17 19202122 15 16 141312 11 10 98765 4 3 2 1 logic 10k
10k
47 47 47k 47k 47k 47k 47k 47k 47k cl 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k da v ee v cc reca1 reca2 recb1 recb2 recc1 recc2 out1 out2 ini1 ini2 ina1 ina2 inb1 inb2 inc1 inc2 ind1 ind2 ine1 ine2 inf1 inf2 ing1 ing2 inh1 inh2 47k f- s w1 f-sw2 cl da vee dgnd vcc reca1 reca2 recb1 recb2 out1 out2 gnd ina1 ina2 inb1 inb2 inc1 inc2 ind1 ind2 ine1 ine2 inf1 inf2 222324 16 15 17 1819 20 1314 21 12 1110 9 87 6 5 432 1 logic f-sw1 f-sw2 10k 10k 47 47 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k
6/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note bd3843fs,bd3841fs 3)bd3843fs (single power source) fig.4 4)bd3841fs (single power source) fig.5 * f-sw1 input function1 f-sw2 input function2 cl da dgnd 1/2vcc reca1 reca2 recb1 recb2 out1 out2 gnd ina1 ina2 inb1 inb2 inc1 inc2 ind1 ind2 ine1 ine2 inf1 inf2 22 2324 16 15 17 181920 1314 21 121110 9 87 6 5 432 1 logic f-sw1 f-sw2 10k 10k 47k 10 47k 10 47k 10 47k 10 10 10 47k 10 47k 10 47k 10 47k 10 47k 10 47k 10 47k 10 47k 10 47k 10 47k 10 47k 10 47k 10 vcc 47 30 29 3132 24 23 25262728 18 17 19 20 21 22 15 16 141312 11 10 98765 4 3 2 1 10k
logic 10k
47 47k 47k 47k 47k 47k 47k 47k cl 47 k 47k 47 k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k 47k da 1/2v cc v cc reca1 reca 2 recb1 recb2 recc1 recc2 out1 out2 ini1 ini2 ina1 ina2 inb1 inb2 inc1 inc2 ind1 in d2 ine1 ine2 inf1 inf2 ing1 ing2 inh1 inh2 47k 47k 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 47k 10 10 10 10 10 10 10 10 10 10 f-sw1 f-sw2 unit resistance capacitor f resistance
7/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note bd3843fs,bd3841fs -5 -4 -3 -2 -1 0 1 2 3 4 5 0246810 vcc,vee (v) circuit current (ma) 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) output voltage (vrms) 0.0001 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) thd+n % -2 -1 0 1 2 10 100 1000 10000 100000 frequency(hz) gain(db) 0.0 1.0 2.0 3.0 4.0 5.0 0246810 vcc,vee (v) noise ( vrms) 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) output voltage (vrms) 0.0001 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 input voltage (vrms) thd+n (%) -2 -1 0 1 2 10 100 1000 10000 100000 frequency (hz) gain (db) 0.0 1.0 2.0 3.0 4.0 5.0 0246810 vcc,vee(v) noise( vrms) h reference data fig.6 circuit current - supply voltage fig.7 output voltage - input voltage fig.8 total harmonic distortion - input voltage fig.9 voltage gain - frequency fig.10 output noise voltage ? supply voltage fig.11 rec output voltage - input voltage fig.12 rec total harmonic distortion - input voltage fig.13 rec voltage gain - frequency fig.14 rec output noise - supply voltage vcc vee
8/9 www.rohm.com 2010.06 - rev.a ? 2010 rohm co., ltd. all rights reserved. technical note bd3843fs,bd3841fs notes for use 1. numbers and data in entries are representative design values and are not guaranteed values of the items. 2. although rohm is confident that the example application circuit reflects the best possible recommendations, be sure to verify circuit characteristics for your particular application. modification of constants for other externally connected circui ts may cause variations in both static and trans ient characteristics for external compo nents as well as this rohm ic. allow for sufficient margins when determining circuit constants. 3. absolute maximum ratings use of the ic in excess of absolute maximum ratings, such as the applied voltage or operating temperature range (topr), may result in ic damage. assumptions should not be made r egarding the state of the ic (short mode or open mode) when such damage is suffered. a physical safety measure, such as a fuse, should be implemented when using the ic at times where the absolute maximum ratings may be exceeded. 4. vee potential make the vee pin voltage such that it is the lowest volt age even when operating below it. actually confirm that the voltage of each pin does not become a lower volt age than the vee pin, including transient phenomena. 5. thermal design perform thermal design, in which there are adequate margins, by taking into account the power dissipation (pd) in actual states of use. 6. short circuit between terminals and erroneous mounting pay attention to the assembly direction of the ics. wrong m ounting direction or shorts betw een terminals, gnd, or other components on the circuits, can damage the ic. 7. operation in strong electromagnetic field using the ics in a strong electromagnetic field can cause operation malfunction. 8. operating voltage range and operating temperature range circuit function actions are gu aranteed within the action voltage range and the action temperature range. however, the specific values of the electrical c haracteristics are guaranteed under the s pecified conditions of the electrical characteristics. therefore, carry out set considerations in sufficient considerati on of ic characteristic fluctuations.. 9. power on/off (a) at power on/off, a shock sound will be g enerated. therefore, use mute on the set. (b) when turning on power supplies, vee and vcc should be powered on simultaneously, or vee first followed by vcc. if the vcc side is started up first, an excessive current may flow from vcc to vee. 10. serial control for the cl and da terminals, the patterned and other wirings should be routed as not to cause interference with the analog-signal-related lines. 11. function switching for all functions, other than master volume, treble, and bass gain settings, use mute on the set.
9/9 www.rohm.com 2010.06 - rev. a ? 2010 rohm co., ltd. all rights reserved. technical note bd3843fs,bd3841fs ordering part number b d 3 8 4 3 f s - e 2 part no. part no. 3843 3841 package fs: ssop-a24 ssop-a32 packaging and forming specification none: tray ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 () direction of feed reel 1pin (unit : mm) ssop-a24 24 0.10.1 12 0.8 ?4 +6 0.17 ?0.05 +0.1 13 1.80.1 4 0.380.1 1 10 0.2 0.5 0.2 1.2 0.15 7.8 0.3 5.4 0.2 (max 10.35 include burr) 0.1 ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tape quantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2000pcs e2 () direction of feed reel 1pin (unit : mm) ssop-a32 1 17 16 32 0.11 0.3min 0.36 0.1 0.8 13.6 0.2 0.15 0.1 5.4 0.2 7.8 0.3 1.8 0.1 (max 13.95 include burr) 0.1
r1010 a www.rohm.com ? 2010 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specified herein is subject to change for improvement without notice. the content specified herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specifications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specified in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specified herein is intended only to show the typical functions of and examples of application circuits for the products. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specified in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any product, such as derating, redunda ncy, fire control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospac e machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specified herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.
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