TEA6420 BUS-CONTROLLED AUDIO MATRIX SWITCH ■ ■ ■ ■ ■ ■ ■ 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 DESCRIPTION The TEA6420 switches 5 stereo audio inputs on 4stereo outputs. All the switching possibilities are changed through the I2C bus. SHRINK DIP 24 (Plastic Package) ORDER CODE: TEA6420 SO28 (Plastic Micropackage) ORDER CODE: TEA6420D GND 1 24 SDA CAPACITANCE 2 23 SCL GND 1 28 SDA CAPACITANCE 2 27 SCL VS 3 26 ADDR L1 4 25 R1 L2 5 24 R2 VS 3 22 ADDR L1 4 21 R1 L2 5 20 R2 L3 6 23 R3 L3 6 19 R3 NC 7 22 NC L4 7 18 R4 NC 8 21 NC L5 8 17 R5 L4 9 20 R4 L5 10 19 R5 LOUT1 9 16 ROUT4 ROUT1 10 15 LOUT4 LOUT2 11 14 ROUT3 ROUT2 12 13 LOUT3 LOUT1 11 18 ROUT4 ROUT1 12 17 LOUT4 LOUT2 13 16 ROUT3 ROUT2 14 15 LOUT3 6420-01.eps - 6420-02.eps Figure 1. PIN CONNECTIONS 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 SDA VS C SUPPLY BUS DECODER SCL ADDR GND GAIN = 0/2/4/6dB LEFT INPUTS 2/7 1 6420-03.eps LEFT OUTPUTS 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 Value 75 75 Unit THERMAL DATA Symbol Rth(j-a) Parameter+ Junction-Ambient Thermal Resistance SDIP24 SO28 o C/W ELECTRICAL CHARACTERISTICS TA = 25oC, VS = 10V, RL = 10kΩ, RG = 600Ω, f = 1kHz (unless otherwise specified) Symbol SUPPLY Parameter VS Supply Voltage IS Supply Current SVR MATRIX Ripple Rejection Test Conditions VIN = 500mVRMS, BW = 20 - 20kHz Min. Typ. Max. Unit 8 9 10.2 V 5 8 mA 70 80 dB VIN Input DC Level 4.5 5 5.5 V RI Input Resistance 30 50 100 kΩ 80 70 90 82 4.5 5 5.5 V 70 200 W CS Channel Separation VIN = 2VRMS Gain = 0dB f = 1kHz Gain = 6dB OUTPUT BUFFER Output DC Level V OUT ROUT eNI S/N Gmin Gmax d VCL RL Output Resistance Input Noise Signal to Noise Ratio Min. Gain BW = 20 - 20kHz, flat VIN = VOUT = 1VRMS Distortion Clipping Level Output Load Resistance 3 110 -1 Max. Gain VIN = VOUT = 1VRMS d = 0.3% dB dB 0 µV dB +1 dB 5 6 7 dB 0.05 % 2 0.01 2.5 VRMS 2 kΩ BUS INPUT VIL Input Low Voltage VIN Input High Voltage II VO Rpu 1.5 3 Input Current Output Voltage ADDR Pullup Resistor V - 10 IO = 3mA ; SDA Acknowledge pin Note 40 V 50 10 µA 0.4 V kΩ 3/7 1 TEA6420 SOFTWARE SPECIFICATION 1. Chip address Address HEX 98 9A 1001 1000 1001 1010 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 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 Q1 Q0 0 0 1 1 0 1 0 1 I2 I1 I0 Input select X Gain select X 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. 22 µF 1 24 SDA 2 23 SCL 3 22 Bus Inputs +9V SW C2 C3 Left Inputs C4 C5 CH1 Output CH2 Output L R L R C11 C12 C13 C14 4 5 6 7 8 9 10 11 12 T E A 6 4 2 0 21 20 19 18 17 16 15 14 13 C6 C7 C8 Right Inputs C9 C10 C18 C17 C16 C15 R L R L CH4 Output CH3 Output 6420-08.04 100nF C1 5/7 1 TEA6420 PACKAGE MECHANICAL DATA 24 PINS - PLASTIC DIP Figure 4. 24-Pin Package E A2 A L A1 E1 Stand-off B1 B e1 e e2 c E D 13 .015 F 24 0,38 Gage Plane 1 12 e3 SDIP24 28 PINS - PLASTIC SO Figure 5. 28-Pin Package 6/7 1 e2 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 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