Ordering number : ENN7308 CMOS IC LC75348, 75348M Single-Chip Electronic Volume and Tone Control System Overview Package Dimensions The LC75348 and LC75348M are electronic volume and tone control ICs that provide volume, balance, 2-band equalizer, input gain control, and input switching functions while requiring a minimal number of external components. unit: mm 3196-DIP30SD [LC75348] 27.0 30 16 8.6 15 0.25 1 (3.25) 3.0 3.95max 0.95 0.51min • Volume: 81 levels: 0 dB to –79 dB (in 1 dB steps) and –∞. The left and right channels are controlled independently, allowing a balance function to be implemented. • Bass: Peaking characteristics bass control with ±20 dB range in 2 dB steps. • Treble: Shelving characteristics treble control with ±10 dB range in 2 dB steps. • Selector: One of 4 inputs can be selected for both left and right channels. • Input gain: Input signal amplification from 0 to +30 dB (in 2 dB steps) 10.16 Functions 0.48 (1.04) 1.78 SANYO: DIP30SD 3216-MFP30SD [LC75348M] 30 16 1 15 0.65 7.9 2.35max 0.15 15.2 0.1 (2.15) • Built-in buffer amplifiers reduce the number of external components required. • Fabricated in a silicon gate CMOS process for minimal switching noise from built-in switches and minimal switching noise even when there is no input signal. • Built-in zero cross circuits minimize switching noise when input signals are present. • Built-in VDD/2 reference voltage generator circuit. • All functions are controlled from serial data. Supports the CCB bus. 10.5 Features 0.4 1.0 (0.6) SANYO: MFP30SD • CCB is a trademark of SANYO ELECTRIC CO., LTD. • CCB is SANYO’s original bus format and all the bus addresses are controlled by SANYO. Any and all SANYO 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 representative nearest you before using any SANYO products described or contained herein in such applications. SANYO 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 products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 13103RM (OT) No. 7308 -1/21 LC75348, 75348M Specifications Absolute Maximum Ratings at Ta = 25°C, VSS = 0 V Parameter Symbol Conditions Maximum supply voltage VDD max VDD Maximum input voltage VIN max All input pins Allowable power dissipation Pd max Ratings Ta ≤ 75°C, Independent IC LC75348 Ta ≤ 75°C, Mounted on a PCB LC75348M Unit 11 V VSS – 0.3 to VDD + 0.3 V 450 mW Operating temperature Topr –30 to +75 °C Storage temperature Tstg –40 to +125 °C CL VDD VREF TIM ROUT RBASS2 RBASS1 RTRE RIN RSELO R4 R3 R2 R1 NC Pin Assignment 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 LC75348 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 DI CE VSS TEST LOUT LBASS2 LBASS1 LTRE LIN LSELO L4 L3 L2 L1 NC LC75348M No. 7308 -2/21 LC75348, 75348M Allowable Operating Ranges at Ta = –30 to +75°C, VSS = 0 V Parameter Symbol Ratings Conditions min typ Unit max Supply voltage VDD VDD 4.5 10 V High-level input voltage VIH CL, DI, CE 2.7 10 V Low-level input voltage VIL CL, DI, CE VSS 1.0 V Input voltage amplitude VIN CE, DI, CL, L1 to L4, R1 to R4, LIN, RIN VSS VDD Vp-p tøW Input pulse width CL 1 µs Setup time tsetup CL, DI, CE 1 µs Hold time thold CL, DI, CE 1 Operating frequency fopg CL µs 500 kHz Electrical Characteristics at Ta = 25°C, VDD = 9 V, VSS = 0 V Parameter Symbol Pin name Conditions Ratings min typ Unit max [Input Block] Maximum input gain Gin max 30 Step resolution Gstep 2 dB Input resistance Rin L1, L2, L3, L4, R1, R2, R3, R4 50 kΩ Clipping level Vcl LSELO, RSELO Output load resistance Rl LSELO, RSELO Input resistance Rin LIN, RIN Step resolution Vstep THD = 1.0%, f = 1 kHz dB 2.50 Vrms 10 kΩ [Volume Control Block] 50 kΩ 1 dB [Treble Band Equalizer Control Block] Control range Geq Step resolution Estep Internal feedback resistance Rfeed max. boost/cut ±8 ±10 ±12 dB 1 2 3 dB 51.7 kΩ [Bass Band Equalizer Control Block] Control range Geq Step resolution Estep Internal feedback resistance Rfeed max. boost/cut ±18 ±20 ±22 dB 1 2 3 dB 66.6 kΩ [Overall Characteristics] THD VIN = 1 Vrms, f = 1 kHz, All controls flat overall Crosstalk CT VIN = 1 Vrms, f = 1 kHz, Rg = 1 kΩ All controls flat overall Output noise voltage VN All controls flat overall IHF – A 6 Maximum attenuation Vomin All controls flat overall –80 dB 40 mA Total harmonic distortion Current drain IDD VDD – VSS = +10 V High-level input current IIH CL, DI, CE: VIN = 10 V Low-level input current IIL CL, DI, CE: VIN = 0 V 0.01 80 dB µV 10 –10 % µA µA No. 7308 -3/21 LC75348, 75348M 3 500kΩ 30 29 TIM PA 22µF VDD 1 Vref VDD CL DI 2 28 27 2.2µF 2.2µF 4 CE VSS TEST PA µCOM 0.068µF Equivalent Circuit 26 ROUT NO SIGNAL TIMER LBASS2 RVref CCB INTERFACE 5 LVref LOUT RBASS2 25 0.1µF 0.1µF 24 RBASS1 6 0.1µF 0.1µF 2700pF CONTROL CIRCUIT MULTIPLEXER LIN 3.7kΩ f0 = 100Hz 23 RTRE LTRE 9 22 RIN 1µF 21 RSELO 1µF 1µF 20 R4 19 R3 18 R2 17 1µF 16 R1 15 1µF L1 14 1µF L2 13 1µF L3 12 1µF L4 11 NC 10 LSELO 1µF 1µF ZERO CROSSDET 8 MULTIPLEXER 2700pF ZERO CROSSDET LBASS1 LOGIC CIRCUIT 7 NC 3.7kΩ f0 = 100Hz No. 7308 -4/21 LC75348, 75348M Control System Timing and Data Format The stipulated serial data must be input to the CL, DI, and CE pins to control the LC75348 and LC75348M. The data structure has a total of 40 bits, of which 8 bits are address and 32 bits are data. CE DI B0 B1 B2 B3 A0 A1 A2 A3 D0 D1 D2 D3 D4 D5 D25 D26 D27 D28 D29 D30 D31 CL 1µs min CE 1µs min 1µs min 1µs min CL 1µs min DI 1µs ≤ TDEST • Address code (B0 to A3) The data has an 8-bit address code, which allows this IC to be used with the SANYO CCB serial bus. Address code (LSB) B0 B1 B2 B3 A0 A1 A2 A3 0 1 0 0 0 0 0 1 D0 D1 D2 D3 Operation 0 0 0 0 L1 (R1) ON 1 0 0 0 L2 (R2) ON 0 1 0 0 L3 (R3) ON 1 1 0 0 L4 (R4) ON (82HEX) • Control code allocation Input switching control (L1, L2, L3, L4, R1, R2, R3, R4) No. 7308 -5/21 LC75348, 75348M Input gain control D4 D5 D6 D7 0 0 0 0 0 dB Operation 1 0 0 0 +2 dB 0 1 0 0 +4 dB 1 1 0 0 +6 dB 0 0 1 0 +8 dB 1 0 1 0 +10 dB 0 1 1 0 +12 dB 1 1 1 0 +14 dB 0 0 0 1 +16 dB 1 0 0 1 +18 dB 0 1 0 1 +20 dB 1 1 0 1 +22 dB 0 0 1 1 +24 dB 1 0 1 1 +26 dB 0 1 1 1 +28 dB 1 1 1 1 +30 dB No. 7308 -6/21 LC75348, 75348M Volume control D8 D9 D10 D11 D12 D13 D14 D15 0 0 0 0 0 0 0 0 0 dB Operation 1 0 0 0 0 0 0 0 –1 dB 0 1 0 0 0 0 0 0 –2 dB 1 1 0 0 0 0 0 0 –3 dB 0 0 1 0 0 0 0 0 –4 dB 1 0 1 0 0 0 0 0 –5 dB 0 1 1 0 0 0 0 0 –6 dB 1 1 1 0 0 0 0 0 –7 dB 0 0 0 1 0 0 0 0 –8 dB 1 0 0 1 0 0 0 0 –9 dB 0 1 0 1 0 0 0 0 –10 dB 1 1 0 1 0 0 0 0 –11 dB 0 0 1 1 0 0 0 0 –12 dB 1 0 1 1 0 0 0 0 –13 dB 0 1 1 1 0 0 0 0 –14 dB 1 1 1 1 0 0 0 0 –15 dB 0 0 0 0 1 0 0 0 –16 dB 1 0 0 0 1 0 0 0 –17 dB 0 1 0 0 1 0 0 0 –18 dB 1 1 0 0 1 0 0 0 –19 dB 0 0 1 0 1 0 0 0 –20 dB 1 0 1 0 1 0 0 0 –21 dB 0 1 1 0 1 0 0 0 –22 dB 1 1 1 0 1 0 0 0 –23 dB 0 0 0 1 1 0 0 0 –24 dB 1 0 0 1 1 0 0 0 –25 dB 0 1 0 1 1 0 0 0 –26 dB 1 1 0 1 1 0 0 0 –27 dB 0 0 1 1 1 0 0 0 –28 dB 1 0 1 1 1 0 0 0 –29 dB 0 1 1 1 1 0 0 0 –30 dB 1 1 1 1 1 0 0 0 –31 dB 0 0 0 0 0 1 0 0 –32 dB 1 0 0 0 0 1 0 0 –33 dB 0 1 0 0 0 1 0 0 –34 dB 1 1 0 0 0 1 0 0 –35 dB 0 0 1 0 0 1 0 0 –36 dB 1 0 1 0 0 1 0 0 –37 dB 0 1 1 0 0 1 0 0 –38 dB 1 1 1 0 0 1 0 0 –39 dB 0 0 0 1 0 1 0 0 –40 dB 1 0 0 1 0 1 0 0 –41 dB 0 1 0 1 0 1 0 0 –42 dB 1 1 0 1 0 1 0 0 –43 dB 0 0 1 1 0 1 0 0 –44 dB 1 0 1 1 0 1 0 0 –45 dB 0 1 1 1 0 1 0 0 –46 dB 1 1 1 1 0 1 0 0 –47 dB 0 0 0 0 1 1 0 0 –48 dB 1 0 0 0 1 1 0 0 –49 dB 0 1 0 0 1 1 0 0 –50 dB Continued on next page. No. 7308 -7/21 LC75348, 75348M Continued from preceding page. D8 D9 D10 D11 D12 D13 D14 D15 1 1 0 0 1 1 0 0 –51 dB Operation 0 0 1 0 1 1 0 0 –52 dB 1 0 1 0 1 1 0 0 –53 dB 0 1 1 0 1 1 0 0 –54 dB 1 1 1 0 1 1 0 0 –55 dB 0 0 0 1 1 1 0 0 –56 dB 1 0 0 1 1 1 0 0 –57 dB 0 1 0 1 1 1 0 0 –58 dB 1 1 0 1 1 1 0 0 –59 dB 0 0 1 1 1 1 0 0 –60 dB 1 0 1 1 1 1 0 0 –61 dB 0 1 1 1 1 1 0 0 –62 dB 1 1 1 1 1 1 0 0 –63 dB 0 0 0 0 0 0 1 0 –64 dB 1 0 0 0 0 0 1 0 –65 dB 0 1 0 0 0 0 1 0 –66 dB 1 1 0 0 0 0 1 0 –67 dB 0 0 1 0 0 0 1 0 –68 dB 1 0 1 0 0 0 1 0 –69 dB 0 1 1 0 0 0 1 0 –70 dB 1 1 1 0 0 0 1 0 –71 dB 0 0 0 1 0 0 1 0 –72 dB 1 0 0 1 0 0 1 0 –73 dB 0 1 0 1 0 0 1 0 –74 dB 1 1 0 1 0 0 1 0 –75 dB 0 0 1 1 0 0 1 0 –76 dB 1 0 1 1 0 0 1 0 –77 dB 0 1 1 1 0 0 1 0 –78 dB 1 1 1 1 0 0 1 0 –79 dB 0 0 0 0 1 0 1 0 –∞ D16 D17 D18 D19 1 0 1 0 +10 dB 0 0 1 0 +8 dB 1 1 0 0 +6 dB 0 1 0 0 +4 dB 1 0 0 0 +2 dB 0 0 0 0 0 dB 1 0 0 1 –2 dB 0 1 0 1 –4 dB 1 1 0 1 –6 dB 0 0 1 1 –8 dB 1 0 1 1 –10 dB Treble control Operation No. 7308 -8/21 LC75348, 75348M Bass control D20 D21 D22 D23 D24 0 1 0 1 0 +20 dB Operation 1 0 0 1 0 +18 dB 0 0 0 1 0 +16 dB 1 1 1 0 0 +14 dB 0 1 1 0 0 +12 dB 1 0 1 0 0 +10 dB 0 0 1 0 0 +8 dB 1 1 0 0 0 +6 dB 0 1 0 0 0 +4 dB 1 0 0 0 0 +2 dB 0 0 0 0 0 0 dB 1 0 0 0 1 –2 dB 0 1 0 0 1 –4 dB 1 1 0 0 1 –6 dB 0 0 1 0 1 –8 dB 1 0 1 0 1 –10 dB 0 1 1 0 1 –12 dB 1 1 1 0 1 –14 dB 0 0 0 1 1 –16 dB 1 0 0 1 1 –18 dB 0 1 0 1 1 –20 dB Zero cross control D25 Operation 0 Data is written according to zero cross detection. 1 Zero cross detection operation is stopped. (Data is acquired on the falling edge of the CE signal.) Channel selection Zero cross signal detection block control D26 D27 0 0 Operation 1 0 RCH 0 1 LCH 1 1 Left and right channels at the same time D28 D29 0 0 Selector 1 0 Volume 0 1 Tone D30 D31 0 0 Operation Test mode Operation These bits select the IC test modes and must be set to 0 during normal operation. No. 7308 -9/21 LC75348, 75348M Pin Functions Pin No. Pin 14 L1 13 L2 12 L3 11 L4 17 R1 18 R2 19 R3 20 R4 10 LSELO 21 RSELO Function Notes VDD VDD • Audio signal inputs SELO Ln Rn Vref • Input selector outputs VDD 7 LBASS1 6 LBASS2 24 RBASS1 25 RBASS2 • Connections for the capacitors and resistors that form the bass band filters VDD VDD BASS1 BASS2 VDD 9 LIN 22 RIN IN • Volume and equalizer inputs VDD 5 LOUT 26 ROUT OUT • Volume and equalizer outputs VDD 8 LTRE 23 RTRE • Connections for the capacitors that form the treble band filters TRE Continued on next page. No. 7308 -10/21 LC75348, 75348M Continued from preceding page. Pin No. Pin Function Notes VDD • 1/2 VDD voltage generator used for the analog system ground 28 Vref 3 VSS • Ground 29 VDD • Power supply A capacitor of about 10 µF must be connected between Vref and AVSS (VSS) to minimize power supply ripple. VDD • Time setting for the zero cross circuit no signal state time. 27 TIM If no zero cross is recognized between the time the data is stored and the time this timer completes, the data is acquired forcibly. • Chip enable CE Data is written to the internal latch and the analog switches operate when this pin goes from high to low. Data transfers are enabled when this pin is high. 1 DI 30 CL • Inputs for the clock and serial data signals used to control this IC 2 VDD VDD • Electronic volume control test pin. 4 15 16 TEST NC This pin must be tied to the VSS level. • Unused (no connection) pins. These pins must be either left open or tied to VSS. No. 7308 -11/21 LC75348, 75348M Internal Equivalent Circuits • Selector Block Equivalent Circuit L1 L2 L3 L4 LSELO 0dB 2dB 50 50 50 50 4dB 6dB LVref 8dB The right channel is identical. Units (Resistors: kΩ) 10dB 12dB 14dB 16dB 18dB 20dB 22dB 24dB 26dB 28dB 30dB R1 1.234 R2 0.980 R3 0.779 R4 0.618 R5 0.491 R6 0.390 R7 0.310 R8 0.246 R9 0.196 R10 0.155 R11 0.123 R12 0.098 R13 0.078 R14 0.062 R15 0.049 R16 0.190 Total = 6 LVref No. 7308 -12/21 LC75348, 75348M • Volume Control Block Internal Equivalent Circuit LIN 0dB R1 = 5434 –1dB R2 = 4845 –2dB R3 = 4319 –3dB R4 = 3850 –4dB R5 = 3431 –5dB R6 = 3058 –6dB R7 = 2726 –7dB R8 = 2429 –8dB R9 = 2165 –9dB R10 = 1930 –10dB R11 = 1720 –11dB R12 = 1533 –12dB R13 = 1366 –13dB R14 = 1218 –14dB R15 = 1085 –15dB R16 = 967 –16dB R17 = 862 R18 = 768 R19 = 685 R20 = 610 R21 = 544 R22 = 485 R23 = 432 R24 = 385 R25 = 343 R26 = 306 R27 = 273 –17dB –18dB –19dB –20dB –21dB –22dB –23dB –24dB –25dB –26dB –27dB 794 R81 R28 = 243 R29 = 216 R30 = 193 R31 = 172 R32 = 153 R33 = 137 R34 = 122 R35 = 108 R36 = 97 R37 = 86 R38 = 77 R39 = 68 R40 = 61 R41 = 54 R42 = 48 R43 = 86 R44 = 77 R45 = 69 R46 = 61 R47 = 55 R48 = 49 R49 = 87 R50 = 77 R51 = 69 R52 = 61 R53 = 55 R54 = 49 796 R82 –28dB R55 = 87 –29dB R56 = 77 –30dB R57 = 69 –31dB R58 = 61 –32dB R59 = 55 –33dB R60 = 49 –34dB R61 = 87 –35dB R62 = 78 –36dB R63 = 69 –37dB R64 = 62 –38dB R65 = 55 –39dB R66 = 49 –40dB R67 = 87 –41dB R68 = 78 –42dB R69 = 69 –43dB R70 = 62 –44dB R71 = 55 –45dB R72 = 49 –46dB R73 = 87 –47dB R74 = 78 –48dB R75 = 69 –49dB R76 = 62 –50dB R77 = 55 –51dB R78 = 49 –52dB R79 = 44 –53dB R80 = 359 –55dB –56dB To treble block –57dB –58dB –59dB –60dB –61dB –62dB –63dB –64dB –65dB –66dB –67dB –68dB –69dB –70dB –71dB –72dB –73dB –74dB –75dB –76dB –77dB –78dB –79dB –∞ –54dB 798 R83 800 R84 802 R85 804 R86 The right channel is identical. Units (Resistors: Ω) LVref No. 7308 -13/21 LC75348, 75348M • Treble/Bass Band Block Internal Equivalent Circuit From volume block SW3 SW2 SW1 SW4 ±8dB ±6dB ±4dB ±2dB 0dB R4 = 5.346 R3 = 6.730 R2 = 8.473 R1 = 10.666 R6 = 16.240 R5 = 4.246 ±10dB The right channel is identical. Units (Resistors: kΩ) LTRE Total = 51.701 SW3 ±8dB ±6dB ±4dB ±2dB 0dB R4 = 7.628 R3 = 9.603 R2 = 12.089 R1 = 15.220 ±12dB R7 = 3.823 R5 = 6.059 ±14dB R8 = 3.037 ±10dB ±16dB R9 = 2.412 SW4 R6 = 4.813 ±18dB R10 = 1.916 ±20dB LOUT SW2 SW1 Total = 66.6 LBASS1 LBASS2 The right channel is identical. Units (Resistors: kΩ) For boost, switches SW1 and SW3 are on, and for cut, switches SW2 and SW4 are on. For 0 dB, the 0dBSW, SW2, and SW3 are on. No. 7308 -14/21 LC75348, 75348M Bass Band Circuit This section presents the equivalent circuit and the formulas for calculating the R and C values for a 100 Hz center frequency. • Bass band equivalent circuit R1 R2 C1 C2 R3 • Sample calculation Specifications: Center frequency: f0 = 100 Hz Gain at maximum boost: G = 20 dB Assume R1 = 0, R2 = 66.6 kΩ, and C1 = C2 = C. (1) Determine R3 from the G = 20 dB condition. G+20dB = 20 × LOG10 1 + R3 = R2 G+20dB/20 2 10 –1 = R2 2R3 66000 = 3.7kΩ 2 × (10 – 1) (2) Determine C from the center frequency f0 = 100 Hz condition 1 f0= 2π R3R2C1C2 1 C= = 2πf 0 R3R2 1 2π × 100 66000 × 3700 = 0.1µF (3) Determine Q Q = R3R2 2R3 · 1 = 2.1 R3R2 No. 7308 -15/21 LC75348, 75348M Treble Band Circuit The treble band circuit can provide shelving characteristics. This section presents the equivalent circuit for boost operation and the calculation formulas. R1 C R2 • Sample calculation Specifications: Set frequency: f = 26,000 Hz Gain at maximum boost: G+10 dB = 10 dB Assume R1 = 16.240 KΩ, and R2 = 35.461 KΩ. The constants mentioned above are calculated as follows. R2 G = 20 × LOG10 1 + 1 R2 C= 2πf 10G/20 = 2π26000 R1 + (1 / ωC)2 2 2 –1 – R12 1 = 2700(pF) 35461 2 2 – 16240 3.16 – 1 No. 7308 -16/21 LC75348, 75348M Usage Notes • The internal transistor states are undefined when power is first applied. Applications must mute the output until control data has been written to the IC. • Operational description of the zero cross switching circuit The LC75348 and LC75348M provide a function that can switch the zero cross comparator signal detection point, allowing applications to select an optimal detection point for the block whose data is being updated. Basically, switching noise can be minimized if the signal immediately following the block whose data is updated is input to the zero cross comparator. This means that the detection point must be switched each time data is updated. Selector Volume Tone controls Switch Zero cross comparator LC75348 and LC75348M Zero Cross Detection Circuit • Zero cross switching control procedure The zero cross switching control procedure consists of three steps. First, set the zero cross control bit to zero cross detection mode (D25 = 0), then specify the block for detection (with bits D28 and D29), and finally transfer the data. Since these control bits are latched first, immediately after the data is transferred, i.e. on the CE falling edge, the mode can be set in a single data transfer operation when updating the volume control or other control block data. The figure below presents an example of the control used when updating the volume control block data. D25 D28 D29 0 1 0 Zero cross detection mode setting Volume control block setting No. 7308 -17/21 LC75348, 75348M • Zero cross timer setting If the input signal is lower than the zero cross comparator detection sensitivity, or if a low-frequency signal is input, the state in which the circuit cannot detect a zero cross may continue and the input data will not be latched during that period. The zero cross timer sets a time for the data to be latched forcibly in states such as this where a zero cross cannot be detected. For example, to set a 25 ms time: T = 0.69 CR Assume C = 0.068 µF. The R will be: 25 × 10–3 R = ————————— ≈ 530 kΩ 0.69 × 0.068 × 10–6 Normally, a time in the range 10 to 50 ms is used. • Notes on serial data transfer (1) Cover the CL, DI, and CE signal lines with the ground pattern or use shielded lines to prevent the high-frequency digital signals carried by these lines from entering the analog signal system. (2) The LC75348 and LC75348M data format consists of 8 bits of address and 32 bits of data. When transmitting data as an even multiple of 8 bits (when transferring 36 bits of data), use the data format shown below. LC75348 and LC75348M Data Reception in Multiples of 8 Bits X X X Dummy data X D0 D1 D2 D3 Input switching control D24 D25 D26 D27 D28 D29 D30 D31 Test mode control X: don’t care No. 7308 -18/21 LC75348, 75348M Volume Characteristics Level — dB Level — dB Input Gain Characteristics Setting — dB Setting — dB Treble Characteristics Level — dB Level — dB Bass Characteristics No. 7308 -19/21 LC75348, 75348M THD – Input Level Characteristics Total harmonic distortion — % Total harmonic distortion — % THD – Frequency Characteristics Frequency — Hz Input Level — dB Total harmonic distortion — % THD – Supply Voltage Characteristics Supply Voltage — V No. 7308 -20/21 LC75348, 75348M Specifications of any and all SANYO 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 Electric 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 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 Electric 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 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 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 January, 2003. Specifications and information herein are subject to change without notice. PS No. 7308 -21/21