SM7346A 42PIN 44PIN TSSOP44 MS-024 SDIP42 10REF

SAMHOP Microelectronics Corp. 6 CHANNELS VOLUME CONTROLLER GENERAL DESCRIPTION FEATURES The SM7346A is 6 channels electronic

SM7346A SM7346A SAMHOP Microelectronics Corp. 6 CHANNELS VOLUME CONTROLLER GENERAL DESCRIPTION FEATURES The SM7346A SM7346A is 6 channels electronic volume controlled by 3-wire serial data. The IC is suitable for use in DVD systems and AV. * 4 Output ports * Built-in microcomputer interface circuit controlled by 16-bit serial data. * Electronic volume Volume level: 0dB~-95dB, - dB(1dB/step) * Tone control Bass/Treble, 0dB~+14dB(2dB/step) APPLICATIONS * DVD Receivers * Home Audio Equipment * AV PIN ASSIGNMENTS OUT4 OUT3 OUT2 OUT1 AVDD SWin GNDS SRin SLin GNDC Cin GNDR Rin GNDL Lin BYPASSR BYPASSL LTRE LBASS3 LBASS2 LBASS1 1 2 3 4 5 6 7 8 9 1 0 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 DVDD CLK DATA LATCH DGND AGND SWout SRout SLout Cout Rout Lout AVSS CL1 CL2 CR1 CR2 RTRE RBASS3 RBASS2 RBASS1 OUT4 OUT3 OUT2 OUT1 AVDD SWin GNDS SRin SLin GNDC Cin GNDR Rin GNDL Lin BYPASSR BYPASSL LTRE LBASS3 LBASS2 LBASS1 NC 1 2 3 4 5 6 7 8 9 1 0 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 DVDD CLK DATA LATCH DGND AGND SWout SRout SLout Cout Rout Lout AVSS CL1 CL2 CR1 CR2 RTRE RBASS3 RBASS2 RBASS1 NC SDIP 42PIN 42PIN TSSOP 44PIN 44PIN Page 1 MAY.2003 SAMHOP Microelectronics Corp. SM7346A SM7346A 6 CHANNELS VOLUME CONTROLLER BLOCK DIAGRAM volume C input C output SW input SW output SL input SL output SR input SR output BypassL BypassR tone L input volume L output R output R input -com interface Latch Data CLK Page 2 MAY.2003 SM7346A SM7346A SAMHOP Microelectronics Corp. 6 CHANNELS VOLUME CONTROLLER PIN DESCRIPTION (Pin count base on 42pin SDIP) Pin No. 1 2 3 4 5 7 10 12 14 6 8 9 11 36 35 34 33 Symbol OUT4 OUT3 OUT2 OUT1 AVDD GNDS GNDC GNDR GNDL SW in SR in SL in C in SW out SR out SL out C out 13 R in 15 BYPASSR BYPASSL Circuit 17 31 32 L out R out 18 Analog positive Power supply +7V GND Connect to analog GND Volume INPUT 6,8,9,11 LBASS3 RBASS3 LBASS2 RBASS2 LBASS1 RBASS1 26 CR2 28 Volume OUTPUT 13,15 CR1 CL1 L out R out AVSS AGND DGND LATCH DATA CLK DVDD Tone INPUT 70 K (TYP) L.R Volume INPUT in BYPASS mode L OUTPUT R OUTPUT 16,17 70 K (TYP) 31,32 18 to 22 K (TYP) CL2 27 29 31 32 30 37 38 39 40 41 42 33,34,35,36 18 to 22 K (TYP) RTRE 19 24 20 23 21 22 1 to 4 LTRE 25 DVDD(=5V) OUTPUT: PMOS Transistor open drain Port OUTPUT L in 16 Function Tone Treble cycle control 18,25 Tone Bass cycle control 2.3 K (TYP) 20,23 19,24 26,28 Tone OUTPUT L.R Volume INPUT L OUTPUT R OUTPUT Analog negative Power supply Analog GND Digital GND Latch INPUT Data INPUT Clock INPUT Forward data Digital Power supply Page 3 21,22 27,29 70 K (TYP) 18 to 22 K (TYP) 31,32 -7V 39,40,41 S INPUT:schmitt trigger type +5V MAY.2003 SM7346A SM7346A SAMHOP Microelectronics Corp. 6 CHANNELS VOLUME CONTROLLER PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM ( Pin count base on 42pin ) OUT4 OUT3 OUT2 OUT1 SWin 42 2 3 OUTPUT PORT MCU volume 4 I/F 6 DVDD 41 1 CLK 40 DATA 39 38 volume 36 SRin SLin 34 9 volume 11 SLout 32 30 13 volume Lin 16 29 15 BYPASSR BYPASSL AVDD SW out SRout volume 31 Rin DGND 35 8 33 Cin LATCH 28 27 volume 17 26 Cout Rout Lout AVSS CL1 CL2 CR1 CR2 5 tone tone Page 4 MAY.2003 SM7346A SM7346A SAMHOP Microelectronics Corp. 6 CHANNELS VOLUME CONTROLLER ABSOLUTE MAXIMUM RATINGS Symbol Parameter Conditions Ratings Unit Vsupply Supply Voltage AVDD-AVSS 16.0 V Pd Power dissipation Ta25oC *standard board 10 mW / oC Topr Operating temperature -20~+75 oC Tstg Storage temperature -40~+125 oC THERMAL DERATING (MAXIMUM RATING) Standard board POWER DISSIPATION pd[W] 1.5 1.0 * Standard board ·board size :70mm X 70mm ·board thickness :1.6mm ·board material :glass epoxy ·copper pattern : ·copper thickness:18um ·copper size :0.25mm(wide) 30mm(length/lead) 0.5 0 25 50 75 100 125 150 AMBIENT TEMPERATURE Ta [] Page 5 MAY.2003 SM7346A SM7346A SAMHOP Microelectronics Corp. 6 CHANNELS VOLUME CONTROLLER RECOMMENDED OPERATING CONDITION Parameter Symbol Condition Min. Typ. Max. Unit Analog positive Supply Voltage AVDD 6.0 7.0 8.0 V Analog negative Supply Voltage AVSS - 8.0 - 7.0 - 6.0 V Digital Supply Voltage DVDD 4.5 5.0 5.5 V High-level Input Voltage VIH DVDDX0.7 DVDD V Low-level Input Voltage VIL DGND DVDDX0.3 V Note1 : AVSS