Ordering number : ENA0260 Monolithic Linear IC LA7958 For TV, VTR Audio/Video Switch 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 Maximum supply voltage Allowable power dissipation Symbol VCC V max Pd max Conditions Ratings Unit Pin 8 13.2 V 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 Recommending operation voltage VCC Pin 8 9.0 V VCC op Pin 8 8.0 to 12.0 V Operating voltage range Conditions Ratings Unit ■ 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. N2206 MS OT B8-4988 No.A0260-1/7 LA7958 Electrical Characteristics at Ta = 25°C, VCC = 9V Parameter Current dissipation Symbol ICC Conditions VCC = 9V, No signal Ratings min typ Unit max 11.2 14.0 16.8 mA 4.0 4.3 4.6 V 3.2 3.6 4.0 Audio Block Audio input DC voltage INa Audio output DC voltage Oa Audio channel bandwidth Fa -3dB frequency 100 Audio signal voltage gain Aa f = 1kHz, VIN = 500mVrms 5.0 6.0 f = 1kHz, THD ≤ 1% 2.0 2.5 VCC = 9V+1Vp-p, SINE WAVE (50Hz) 35 50 Audio input dynamic range Da V kHz 7.0 dB Vp-p Audio channel PSRR PSa Audio channel input impedance Ria 80 100 120 kΩ Audio channel output impedance Roa 40 50 65 Ω Audio channel crosstalk CTa f = 1kHz 65 80 Audio channel S/N SNa Filter = DIN/AUDIO 70 85 Audio channel THD THDa f = 1kHz, VIN = 500mVrms 0.15 dB dB dB 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 7.0 Video channel bandwidth Fv -3dB frequency 10 Video signal voltage gain Av f = 500kHz, VIN = 1Vp-p 5.0 6.0 Video input dynamic range Dv f = 100kHz, THD ≤ 1% 2.0 2.5 SINE WAVE (50Hz) MHz dB Vp-p Video channel PSRR PSv 35 50 Video channel input impedance Riv 8.0 10 12.0 kΩ dB Video channel output impedance Rov 29 37 48 Ω Video channel crosstalk CTv f = 3.58MHz, VIN = 1Vp-p 45 60 dB Video channel noise SNv Bandwidth 10MHz 57 62 dB 4.0 4.3 4.0 4.3 4.6 V 5.0 6 7.0 dB Y, C Mixer Y input DC voltage INy 4.6 V C input DC voltage INc Y+C signal voltage gain Ayc Differential gain DG 2.0 3.5 % Differential phase DP 1.0 2.0 deg 2.6 3.0 V Yin = 1Vp-p, Cin = 0.3Vp-p Mode Selection Block Mode selection threshold voltage Vmth 2.2 No.A0260-2/7 LA7958 Logic True Table Video-Output A : Pin 11 B : Pin 13 L C : Pin 15 L OPEN H 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 A : Pin 11 B : Pin 13 C : Pin 15 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 A : Pin 11 B : Pin 13 L C : Pin 15 L OPEN H 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 22 0.25 10.16 8.6 12 1 11 0.9 2.54 0.5 1.2 0.51min 4.25 3.1 4.95max 27.2 SANYO : DIP22(400mil) No.A0260-3/7 LA7958 Pin Assignment Block Diagram No.A0260-4/7 LA7958 No. 1 Parameter Video signal voltage gain (Av) Explanations Test circuit P : Pins 7, 9, 12, 19 Q : Pin 16 VIN = 1Vp-p Input inpedance 75kΩ Av = 20 log Vout/VIN (dB) 2 Video channel bandwidth (Fv) P : Pins 7, 9, 12, 19 Q : Pin 16 VIN = 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 VIN = 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 VIN = 500mVrms Aa = 20 log Vout/VIN (dB) Continued on next page. No.A0260-5/7 LA7958 Continued from preceding page. No. 7 Parameter Audio channel bandwidth (Fa) Explanations Test circuit P : Pins 1, 2, 3, 4, 5, 6, 21, 22 Q : Pins 17,18 VIN = 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 VIN = 1Vp-p P : Pins 1, 2, 3, 4,5, 6, 21, 22 Q : Pins 17, 18 No.A0260-6/7 LA7958 Test 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. 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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 Novemver, 2006. Specifications and information herein are subject to change without notice. PS No.A0260-7/7