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HT8972

Holtek Semiconductor
Part Number HT8972
Manufacturer Holtek Semiconductor
Description Voice Echo
Published Jan 6, 2016
Detailed Description HT8972 Voice Echo Features · Operating voltage: 4.5V~5.5V · ADM algorithm · Low noise - Echo mode: -85dB - Surround mod...
Datasheet PDF File HT8972 PDF File

HT8972
HT8972

Overview
HT8972 Voice Echo Features · Operating voltage: 4.
5V~5.
5V · ADM algorithm · Low noise - Echo mode: -85dB - Surround mode: -90dB · Low distortion rate - Echo mode: 1% - Surround mode: 0.
2% · Built-in 40Kb SRAM · Automatic reset function · 16-pin DIP/SOP package Applications · Television · Karaoke systems · Video disc player · Sound equipments General Description The HT8972 is an echo/surround effect processor.
It is designed for various audio systems including karaoke, television, sound equipments, etc.
The chip consists of a built-in pre-amplifier, VCO or Voltage Control OSC, 40Kb SRAM, A/D and D/A converters as well as delay time control logic.
Its built-in 40Kb SRAM can generate delay time effect and can control the delay time value through the external VCO resistor.
The VCO circuit can reduce external components and make it easy to adjust the delay time.
Block Diagram L P F 1 _ IN LP F1_O U T L P F 2 _ O U T L P F 2 _ IN O P 2 _ O U T O P 2 _ IN O P 1 _ IN O P 1 _ O U T C C 0 CC1 COM P LP F1 LP F2 4 .
7 k W 4 .
7 k W MOD DEM 1 /2 V C C AU TO RESET DI M O M I C LO C K 4 0 K B its RAM VCO VCC REF AG ND DG ND O SC _O v c o DO0 DO1 Rev.
1.
00 1 December 23, 2008 Pin Assignment Pad Assignment VCC REF AG ND DGND O S C _O VCO CC1 CC0 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 H T8972 1 6 D IP -A /S O P -A L P F 1 _ IN LP F1_O U T LP F2_O U T L P F 2 _ IN O P 2_O U T O P 2 _ IN O P 1 _ IN O P 1_O U T HT8972 L P F 2 _ IN LP F2_O U T LP F1_O U T L P F 1 _ IN VCC REF AG ND DGND 1 16 15 14 13 12 11 10 (0 ,0 ) 23 45 67 89 O P 2_O U T O P 2 _ IN O P 1 _ IN O P 1_O U T CC0 CC1 VCO O S C _O Chip size: 2475´2065 (mm)2 * The IC substrate should be connected to VSS in the PCB layout artwork.
Rev.
1.
00 2 December 23, 2008 HT8972 Pad Coordinates Pad No.
1 2 3 4 5 6 7 8 X -883.
875 -865.
105 -564.
105 -44.
775 147.
425 395.
225 587.
425 835.
225 Y 861.
250 -891.
900 -892.
700 -892.
700 -892.
700 -892.
700 -892.
700 -892.
700 Pad No.
9 10 11 12 13 14 15 16 ...


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