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LC7535M Datasheet(PDF) 5 Page - Sanyo Semicon Device |
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LC7535M Datasheet(HTML) 5 Page - Sanyo Semicon Device |
5 / 9 page No. 5760-5/9 LC7535M Pin Descriptions Pin No. Pin Function Equivalent circuit • 5-dB step attenuator inputs These inputs must be driven by low-impedance circuits. 2 L5dBIN 29 R5dBIN • Loudness circuit connections Connect the high-band compensation capacitors between the CT1 and 5dBIN pins, and connect the low band compensation capacitors between the CT2 and the VM pins. • 5-dB step attenuator outputs These outputs must be accepted by circuits with an impedance of between 47 k Ω and 1 MΩ. 3 LCT1 28 RCT1 4 LCT2 27 RCT2 5 L5dBOUT 26 R5dBOUT • 1-dB step attenuator inputs These inputs must be driven by low-impedance circuits. 7 L1dBIN 24 R1dBIN • 1-dB step attenuator outputs These outputs must be accepted by circuits with an impedance of between 47 k Ω and 1 MΩ. 8 L1dBOUT 23 R1dBOUT • Common connections for the volume control circuit. The impedance of the printed circuit board pattern connected to these pins must be kept as low as possible. Since the LVM, RVM, and VSS pins are not connected internally, they must be connected externally as required by the various specifications. When a single-sided power supply is used, the capacitors between VM and VSS become the residual resistance when the volume control is set at its maximum attenuation. This means that care is required in selecting the values of these capacitors. 9 LVM • Selection input for the address code in the data format. If this pin is connected to VDD, data will be accepted when the address code is 9, and if connected to VCC, data will be accepted when the address code is 8. 12 S 22 RVM • Input pins for the serial data used to control the device. These inputs must have an amplitude of 0 to 5 V. In applications in which any of microcontroller CL, DI, or CE may go high in backup mode (when VDD = VCC = 0 V), the signal lines must have series resistors of at least 2 k Ω inserted. 17 CL • Power supply connections. All these pins must be connected to the corresponding power supply voltage. When power is first applied, the VCC voltage must not rise before VDD. 10 VEE 18 DI 19 CE • Unconnected (NC) pins Do not connect any signals or devices to these pins. 1, 6, 11, 15, 16, 20, 25, 30 NC 13 VDD 14 VSS 21 VCC |
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