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Ordering number:ENN3942
CMOS IC
LC7536LHS
High-Voltage, Two-Channel Electronic Attenuator
Overview
The LC7536LHS is a two-channel electronic attenuator for volume, balance and loudness controls in stereo audio applications. The LC7536LHS reads data from a three-line serial bus to control attenuation in 1 dB steps over an 80 dB range, up to a maximum of 96 dB. It features a center tap at 20 dB attenuation for a loudness control using a minimum of external components. A device select pin allows two devices to be connected to the serial bus. The LC7536LHS operates from 5 V and 10 V supplies and is available in 30-pin DIPs.
1.15 1.78 0.48 0.95
Package Dimensions
unit:mm 3061-DIP30S
[LC7536LHS]
30 16 10.16 8.6
1 27.2
15 4.25 3.2 4.95max
Features
* Three-line serial control. * Two device select. * Tap at 20 dB attenuation for a loudness control. * 80 dB attenuation range adjustable in 1 dB steps. * 96 dB maximum attenuation. * 75 dB crosstalk rejection. * 0.022% total harmonic distortion. * 47k input impedance. * 5 V and 10 V supplies. * 30-pin DIP.
0.51min
SANYO : DIP30S
Specifications
Absolute Maximum Ratings at Ta=25C, VSS=0V, VEE=0V
Parameter Maximum supply voltage CLK, DI and CE input voltage range Analog input voltage range Select pin input voltage range Allowable power dissipation Operating temperature range Stroage temperature range Symbol VDD max VCC max VI1 VI2 VI3 Pd max Topr Tstg Ta85C Conditions Ratings 0 to 12 0 to 7 0 to VCC+0.3 VEE-0.3 to VDD+0.3 VCC-0.3 to VDD+0.3 250 -40 to +85 -50 to +125 Unit V V V V mW
C C
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
51501TN (KT)/8051JN No.3942-1/7
0.25
LC7536LHS
Recommended Operating Conditions at Ta = 25C, VSS = 0 V, VEE = 0 V
Parameter Analog supply voltage Logic supply voltage Logic supply voltage Symbol VDD VCC VCC Conditions Ratings VCC+3.2 to 10.0 5 3.6 to 5.5 Unit V V V
Electrical Characteristics at Ta = 25C, VCC = 5 V, VDD = 10 V, VEE = 0 V, VSS = 0 V
Parameter Supply current Serial bus HIGH-level input voltage Select pin HIGH-level input voltage Serial bus LOW-level input voltage Select pin LOW-level input voltage Input voltage Input pulsewidth Setup time Hold time Operating frequency Output leakage current Total harmonic distortion Crosstalk rejection Maximum attenuation Symbol IDD ICC VIH1 VIH2 VIL1 VIL2 VIN tW tsetup thold fopg IOFF THD Cr V0 Analog switches OFF VIN=0.3V, f=1kHz, VDD-VEE=10V, VR=VR(max) f=20kHz, VIN=1V f=20kHz, VIN=1V 60 -10 0.022 75 96 0.8VCC 0.8x (VDD -VCC) +VCC VSS VCC VEE 20 20 20 25 +10 Conditions Ratings min typ max 1 1 VCC VDD
0.2VCC
Unit mA V V V V VP-P s s s kHz A % dB dB
0.2x (VDD -VCC) +VCC VDD
Pin Assignment
Top view
No.3942-2/7
LC7536LHS Block Diagram
Pin Description
Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Name L5dBIN NC LCT1 LCT2 L5dBOUT L1dBIN NC L1dBOUT LVM VEE NC S VDD VSS NC NC CLK D1 CE NC VCC RVM R1dBOUT NC R1dBIN R5dBOUT RCT2 RCT1 NC R5dBIN No connection Left-channel loudness compensation inputs. Left-channel 5 dB attenutaiton step output. Approximately 1 M load resistance. Left-channel 1 dB attenutaiton step input. Low-impedance drive. No connection Left-channel 1 dB attenutaiton step output. 47 k to 1 M load resistance. Left-channel volume control common. Normally connected to ground. Ground No connection Address select input. 10 V supply Ground No connection Clock input. Serial data input. Chip enable input. No connection 5 V supply Right-channel volume control common. Normally connected to ground. Right-channel 1 dB attenutaiton step otuput. 47 k to 1 M load resistance. No connection Right-channel 1 dB attenutaiton step input. Low-impedance drive. Right-channel 5 dB attenutaiton step output. Approximately 1 M load resistance. Right-channel loudness compensation inputs. No connection Right-channel 5 dB attenutaiton step input. Low-impedance drive. 75 k total resistance. Description Left-channel 5 dB attenutaiton step input. Low-impedance drive. 75 k total resistance.
No.3942-3/7
LC7536LHS
Timing
Functional Description
Data Control Data is clocked into a 20-bit shift register. When 20 bits have been received, the data is latched and then passed to a level shifter. Data Format The 20-bit data word comprises a 4-bit address code, two 4-bit 5 dB attenuation step selectors, two 3-bit 1 dB attenuation step selectors and a loudness control ON/OFF bit as shown in figure 1.
Figure 1. Data format
No.3942-4/7
LC7536LHS
The voltage on the select input determines the address of the device as shown in table 1. Table 1. Address codes
Select pin VDD VCC A0 1 0 A1 0 0 A2 0 0 A3 1 1
Data bits D4 to D6 select the right-channel attenuation in 1 dB steps as shown in table 3. Similarly, bits D12 to D14 select the left-channel attenuation in 1 dB steps. Table 3. Right-channel 1 dB steps
Attenuation(dB) 0 1 2 3 4 D4 0 1 0 1 0 0 D5 1 0 0 1 1 0 D6 1 1 1 0 0 0
Data bits D0 to D3 select the right-channel attenuation in 5 dB steps as shown in table 2. Similarly, bits D8 to D11 select the left-channel attenuation in 5 dB steps. Table 2. Right-channel 5 dB steps
Attenuation(dB) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 D0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 D1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 D2 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 D3 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
Data bits D7 selects loudness control. When D7 is 1, loudness control is ON, and when 0, loudness control is OFF.
Audio Signal The right-channel audio input signal is input on R5dBIN(5 dB attenuation steps). The output, R5dBout, is fed back to R1dBIN (1 dB attenuation steps). The right-channel audio output is on R1dBOUT. The left-channel audio signal flow is identical.
No.3942-5/7
LC7536LHS Typical Application
Figure 2. Typical application
No.3942-6/7
LC7536LHS
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 expor ted without obtaining the expor t 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 May, 2001. Specifications and information herein are subject to change without notice.
PS No.3942-7/7

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