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| TEA6420 BUS-CONTROLLED AUDIO MATRIX SWITCH s s s s s s s 5 Stereo Inputs 4 Stereo Ouputs Gain Control 0/2/4/6dB/Mute for each Output cascadable (2 different addresses) Serial Bus Controlled Very low Noise Very low Distorsion SHRINK DIP 24 (Plastic Package) ORDER CODE: TEA6420 DESCRIPTION The TEA6420 switches 5 stereo audio inputs on 4stereo outputs. All the switching possibilities are changed through the I2C bus. SO28 (Plastic Micropackage) ORDER CODE: TEA6420D Figure 1. PIN CONNECTIONS GND CAPACITANCE VS L1 L2 L3 L4 L5 LOUT1 ROUT1 LOUT2 ROUT2 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 SDA SCL ADDR R1 R2 R3 R4 R5 ROUT4 LOUT4 ROUT3 LOUT3 GND CAPACITANCE VS L1 L2 L3 NC NC L4 L5 LOUT1 ROUT1 LOUT2 ROUT2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 SDA SCL ADDR R1 R2 R3 NC NC 6420-01.eps - 6420-02.eps R4 R5 ROUT4 LOUT4 ROUT3 LOUT3 February 2006 1/7 1 TEA6420 Figure 2. BLOCK DIAGRAM RIGHT INPUTS T E A 6 4 2 0 GAIN = 0/2/4/6dB RIGHT OUTPUTS VS C GND SUPPLY BUS DECODER SDA SCL ADDR LEFT OUTPUTS LEFT INPUTS 2/7 1 6420-03.eps GAIN = 0/2/4/6dB TEA6420 ABSOLUTE MAXIMUM RATINGS Symbol VCC TOPER Tstg Parameter Supply Voltage (Pin 9) Operating Ambient Temperature Range Storage Temperature Range Value 12 0 to +70 -20 to +150 Unit V o C oC THERMAL DATA Symbol Rth(j-a) Parameter+ Junction-Ambient Thermal Resistance SDIP24 SO28 Value 75 75 Unit o C/W ELECTRICAL CHARACTERISTICS TA = 25oC, VS = 10V, RL = 10k, RG = 600, f = 1kHz (unless otherwise specified) Symbol SUPPLY VS IS SVR MATRIX VIN RI CS Parameter Supply Voltage Supply Current Ripple Rejection Input DC Level Input Resistance Channel Separation VIN = 2VRMS Gain = 0dB f = 1kHz Gain = 6dB VIN = 500mVRMS, BW = 20 - 20kHz 70 4.5 30 80 70 4.5 Test Conditions Min. 8 Typ. 9 5 80 5 50 90 82 5 70 BW = 20 - 20kHz, flat VIN = VOUT = 1VRMS -1 5 VIN = VOUT = 1VRMS d = 0.3% 2 2 3 110 0 6 0.01 2.5 +1 7 0.05 5.5 200 5.5 100 Max. 10.2 8 Unit V mA dB V k dB dB V W V dB dB dB % VRMS k OUTPUT BUFFER Output DC Level V OUT ROUT eNI S/N Gmin Gmax d VCL RL BUS INPUT VIL VIN II VO Rpu Output Resistance Input Noise Signal to Noise Ratio Min. Gain Max. Gain Distortion Clipping Level Output Load Resistance Input Low Voltage Input High Voltage Input Current Output Voltage ADDR Pullup Resistor IO = 3mA ; SDA Acknowledge pin Note 3 - 10 40 50 1.5 V V 10 0.4 A V k 3/7 1 TEA6420 SOFTWARE SPECIFICATION 1. Chip address Address 1001 1000 1001 1010 HEX 98 9A ADDR 0 1 2. Data bytes Output select X 0 0 1 1 0 1 0 1 G1 G0 I2 I1 I0 Output 1 Output 2 Output 3 Output 4 Input select X Q1 Q0 G1 G0 0 0 0 0 1 1 0 0 1 1 0 0 0 1 0 1 0 1 Input 1 Input 2 Input 3 Input 4 Input 5 Mute Gain select X Q1 Q0 0 0 1 1 0 1 0 1 I2 I1 I0 Gain Gain Gain Gain = 6 dB = 4 dB = 2 dB = 0 dB X = don't care - MSB is transmitted first Example : X1001100 connects output 3 with input 5 at a gain of 4dB The following are selected after power-on reset : input 5 selected for all outputs ; gain = 0dB. 4/7 1 TEA6420 TYPICAL APPLICATION Figure 3. 1 22 F +9V 24 23 SDA SCL 2 Bus Inputs SW 3 100nF C1 C2 Left Inputs C3 C4 C5 L R L R C11 C12 C13 C14 22 4 5 6 7 8 9 10 11 12 CH1 Output T E A 6 4 2 0 21 20 19 18 17 16 15 14 13 C6 C7 C8 C9 C10 C18 C17 C16 C15 R L R L Right Inputs CH4 Output CH2 Output CH3 Output 6420-08.04 5/7 1 TEA6420 PACKAGE MECHANICAL DATA 24 PINS - PLASTIC DIP Figure 4. 24-Pin Package E E1 A1 A2 Stand-off L A B B1 e e1 e2 c D E 24 13 F .015 0,38 Gage Plan e 1 12 e3 SDIP24 e2 28 PINS - PLASTIC SO Figure 5. 28-Pin Package 6/7 1 TEA6420 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without the express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c)2006 STMicroelectronics - All Rights Reserved. Purchase of I2C Components by STMicroelectronics conveys a license under the Philips I2C Patent. Rights to use these components in an I2C system is granted provided that the system conforms to the I2C Standard Specification as defined by Philips. STMicroelectronics Group of Companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America. http://www.st.com 7/7 |
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