Sound Processors for Home Theater Systems 6ch / 9ch Stereo Input Selectors No.10081EAT07 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. Therefore, it is can be used for 2nd room entertainment and 2nd source recording. BD3843FS has excellent cross-talk characteristics 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 systems, 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 VCC 7.5 *1 Power Supply Voltage V VEE -7.5 Input signal voltage VIN VCC+0.3VEE-0.3 V 800 (BD3843FS) Power Dissipation Pd *2 mW 950 (BD3841FS) 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 cause 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). www.rohm.com 2010.06 - Rev.A 1/9 2010 ROHM Co., Ltd. All rights reserved. Technical Note BD3843FS,BD3841FS Operating range Must function normally at Ta = 25, Ratings Symbol Unit Part No. Parameter Min. Typ. Max. VCC 4 7 7.3 Action power source voltage (both power sources) VEE -7.3 -7 -4 BD3843FS V Action power source voltage VCC- VEE 8 14 14.6 (single power source) VCC 5 7 7.3 Action power source voltage (both power sources) VEE -7.3 -7 -5 BD3841FS V Action power source voltage VCC- VEE 10 14 14.6 (single power source) Electrical characteristics Ta=25, VCC=7V, VEE=7V, f=1kHz, Vin=1Vrms, RL=10k, Rg=600, unless otherwise noted. Limits Symbol Unit Conditions Parameter Min. Typ. Max. VCC 3 10 Circuit current IQ mA No signal VEE -10 -3 Output voltage gain 1ch Gv1 -2 0 2 dB Output voltage gain 2ch Gv2 -2 0 2 dB Total harmonic distortion ratio 1ch THD1 0.004 0.05 % BW=40030kHz Total harmonic distortion ratio 2ch THD2 0.004 0.05 % BW=40030kHz Maximum output voltage 1ch Vomax1 3.4 4.2 Vrms THD=1% Maximum output voltage 2ch Vomax2 3.4 4.2 Vrms THD=1% Output noise voltage 1ch Vno1 1 5 Vrms Rg=0, BW=IHF-A Output noise voltage 2ch Vno2 1 5 Vrms Rg=0, BW=IHF-A Cross-talk between channels CTC12 -95 -80 dB Rg=0, BW=IHF-A 1ch2ch Cross-talk between channels CTC21 -95 -80 dB Rg=0, BW=IHF-A 2ch1ch Cross-talk between selectors 1ch CTS1 -95 -80 dB Rg=0, BW=IHF-A Cross-talk between selectors 2ch CTS2 -95 -80 dB Rg=0, BW=IHF-A R voltage gain 1ch GVR1 -2 0 2 dB RL=47k , R voltage gain 2ch GVR2 -2 0 2 dB RL=47k , RL=47k , R Total harmonic distortion ratio 1ch THDR1 0.01 0.09 % BW=40030kHz RL=47k , R Total harmonic distortion ratio 2ch THDR2 0.01 0.09 % BW=40030kHz R output noise voltage 1ch VnoR1 1 5 Vms Rg=0, BW=IHF-A R output noise voltage 2ch VnoR2 1 5 Vms Rg=0, BW=IHF-A R output impedance 1ch RoutR1 50 100 R output impedance 2ch RoutR2 50 100 * Note: This IC is not designed to be radiation-resistant. www.rohm.com 2010.06 - Rev.A 2/9 2010 ROHM Co., Ltd. All rights reserved. REC output Output