HT8970 Voice Echo Features · Operating voltage: 4.5V~5.5V · Built-in 20Kb SRAM · ADM algorithm · Automatic reset function · Low noise - Echo mode: -85dB - Surround mode: -90dB · 16-pin DIP/SOP package Applications · Television · Video disc player · Karaoke systems · Sound equipments General Description The HT8970 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, 20Kb SRAM, A/D and D/A converters as well as delay time control logic. Its built-in 20Kb 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 L P F 1 _ 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 4 .7 k W 4 .7 k W C O M P O P 1 _ IN O P 1 _ O U T C C 0 C C 1 M O D D E M L P F 2 L P F 1 1 /2 V C C D I D O 0 M O A U T O R E S E T V C C Rev. 1.10 R E F A G N D M I 2 0 K B its R A M D G N D D O 1 C L O C K V C O O S C _ O 1 V C O May 2, 2008 HT8970 Pin Assignment V C C 1 1 6 L P F 1 _ IN R E F 2 1 5 L P F 1 _ O U T A G N D 3 1 4 L P F 2 _ O U T D G N D 4 1 3 L P F 2 _ IN O S C _ O 5 1 2 O P 2 _ O U T V C O 6 1 1 O P 2 _ IN C C 1 7 1 0 O P 1 _ IN C C 0 8 9 O P 1 _ O U T H T 8 9 7 0 1 6 D IP -A /S O P -A Pad Assignment 1 4 1 3 1 2 L P F 2 _ IN L P F 2 _ O U T L P F 1 _ IN L P F 1 _ O U T D G N D V C C R E F A G N D 1 5 1 1 1 0 1 6 1 (0 ,0 ) O S C _ O V C O 3 7 8 9 O P 2 _ IN O P 2 _ O U T 6 O P 1 _ IN 5 O P 1 _ O U T 4 C C 0 C C 1 2 Chip size: 73 ´ 86 (mil)2 The IC substrate should be connected to VSS in the PCB layout artwork. Rev. 1.10 2 May 2, 2008 HT8970 Pad Coordinates Unit: mm Pad No. X Y 1 -730.950 688.300 2 -668.800 -652.050 3 -668.800 -755.050 4 -642.650 -951.700 5 -344.900 -951.700 6 -134.150 -951.700 7 135.100 -951.700 8 406.400 -951.700 9 687.400 -951.700 10 735.950 941.950 11 640.950 941.950 12 537.950 941.950 13 442.950 941.950 14 -94.000 920.850 15 -256.650 868.650 16 -578.400 749.850 Pad Description Pad No. Pad Name I/O Description 1 DGND I Digital ground 2 OSC_O O System oscillator output 3 VCO I System oscillator input, system frequency adjustable pin 4 CC1 ¾ Current control 1 5 CC0 ¾ Current control 0 6 OP1_OUT O OP1 output 7 OP1_IN I OP1 input 8 OP2_IN I OP2 input 9 OP2_OUT O OP2 output 10 LPF2_IN I Low pass filter 2 input 11 LPF2_OUT O Low pass filter 2 output 12 LPF1_OUT O Low pass filter 1 output 13 LPF1_IN I Low pass filter 1 input 14 VCC I Analog and positive power supply 15 REF I Analog reference voltage 16 AGND I Analog ground Rev. 1.10 3 May 2, 2008 HT8970 Absolute Maximum Ratings Supply Voltage..............................VSS-0.3V to VDD+6V Storage Temperature ............................-50°C to 125°C Input Voltage..............................VSS-0.3V to VDD+0.3V Operating Temperature...........................-20°C to 70°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Electrical Characteristics Symbol Ta=25°C Test Conditions Parameter VDD Conditions Min. Typ. Max. Unit VCC Operating Voltage ¾ ¾ 4.5 5.0 5.5 V ICC Operating Current 5V ¾ ¾ 15 30 mA GV Voltage Gain 5V RL=47kW ¾ -0.9 2.5 dB VOMAX Maximum Output Voltage 5V THD=10% 0.9 1.8 ¾ Vrms NO Output Noise Voltage 5V DIN Audio ¾ -85 -60 dBV PSRR Power Supply Rejection Ratio 5V DVCC=-20dBV (0.1Vrms) f=100Hz ¾ -40 -30 dB Functional Description · Echo mode The HT8970 is an echo/surround effect generator with built-in 20Kb SRAM. The chip provides two playing modes (echo and surround) and the playing function block diagrams are shown as follows. V V IN L P F 1 A /D O U T D e la y D /A L P F 2 · Surround mode V IN L P F 1 A /D D e la y D /A V L P F 2 O U T ROSC-fOSC-Delay_time Cross Table ROSC 56.6 44.8 36.2 30.4 26.0 23.2 20.6 kW fOSC 2.0 2.5 3.0 3.5 4.0 4.5 5.0 MHz Td 326 260 218 188 162 146 130 ms ROSC 18.3 16.6 15 14.2 13.4 12.5 11.6 kW fOSC 5.5 6.0 6.5 7.0 7.5 8.0 8.5 MHz Td 119 110 102 94.4 88 82.4 76.8 ms ROSC 10.8 9.5 8.4 7.6 6.8 6.3 5.6 kW fOSC 9 10 11 12 13 14 15 MHz Td 73.2 64.8 59.2 54.4 50.0 46.4 42.8 ms ROSC 5.00 4.09 3.68 3.42 3.08 2.84 2.65 kW fOSC 16 17 18 19 20 21 22 MHz Td 40.4 38.4 36.4 34.2 32.8 31.0 29.6 ms Rev. 1.10 4 May 2, 2008 HT8970 Application Circuits Echo Mode 0 .6 8 m F 1 m F 1 k W 9 V 1 k W 3 M IC 2 8 4 .7 k W 4 .7 k W 4 7 k W 1 0 0 m F 4 .7 k W 9 V 1 5 V 0 .1 m F V C C 2 1 0 0 m F 4 .7 m F 3 R E F 4 A G N D 2 0 k W 5 O S C _ O 6 V C O 7 8 0 .1 m F 0 .1 m F 2 0 k W 4 7 k W 2 2 m F 3 9 p F 5 6 0 0 p F 1 6 L P F 1 _ IN 1 5 L P F 1 _ O U T 1 0 k W 4 .7 m F 1 5 k W 1 0 0 k W 4 .7 m F 5 6 0 p F 4 .7 k W 1 2 k W D G N D R 4 5 6 0 W 4 .7 k W 4 .7 m F 1 4 5 5 8 1 3 k W 1 0 m F 1 0 m F O u tp u t 1 5 k W 0 .0 3 3 m F L P F 2 _ O U T 1 4 L P F 2 _ IN 1 3 O P 2 _ O U T 1 2 C C 1 O P 2 _ IN C C 0 O P 1 _ IN 1 5 k W 5 6 0 p F 5 6 0 p F 1 0 k W 1 5 k W 1 1 0 .0 4 7 m F 1 0 9 O P 1 _ O U T 0 .0 4 7 m F H T 8 9 7 0 Note: : Analog ground, : Digital ground When the value of the ROSC increases, the range of the Delay time also increases. Please refer to the ROSC - fOSC - Delay_time Cross table for the ROSC & Delay time values. Rev. 1.10 5 May 2, 2008 HT8970 Surround Mode 0 .6 8 m F 1 m F 1 k W 9 V 1 k W 3 M IC 2 8 4 .7 k W 4 .7 k W 4 7 k W 1 0 0 m F 4 .7 k W 9 V 4 2 0 k W 5 6 0 W 4 7 k W 2 2 m F 3 9 p F 5 6 0 0 p F 4 .7 k W 4 .7 m F 1 4 5 5 8 1 5 k W 4 .7 m F 1 0 0 k W 1 5 V 0 .1 m F V C C 2 1 0 0 m F 3 4 .7 m F A G N D 4 2 0 k W 1 6 L P F 1 _ IN R E F D G N D O S C _ O 6 V C O R 5 5 6 0 p F L P F 1 _ O U T 1 5 1 2 k W 8 0 .1 m F 0 .1 m F L P F 2 _ IN 1 3 O P 2 _ O U T 1 2 C C 1 O P 2 _ IN C C 0 O P 1 _ IN O P 1 _ O U T 1 0 m F 1 4 L P F 2 _ O U T 7 1 0 k W 5 6 0 p F 1 0 k W 3 k W O u tp u t 1 5 k W 5 6 0 p F 1 5 k W 1 1 0 .0 4 7 m F 9 1 0 0 .0 4 7 m F H T 8 9 7 0 Note: : Analog ground, : Digital ground When the value of the ROSC increases, the range of the Delay time also increases. Please refer to the ROSC - fOSC - Delay_time Cross table for the ROSC & Delay time values. Rev. 1.10 6 May 2, 2008 HT8970 Package Information 16-pin DIP (300mil) Outline Dimensions A B 1 6 9 8 1 H C D a G E I F Symbol Rev. 1.10 Dimensions in mil Min. Nom. Max. A 745 ¾ 775 B 240 ¾ 260 C 125 ¾ 135 D 125 ¾ 145 E 16 ¾ 20 F 50 ¾ 70 G ¾ 100 ¾ H 295 ¾ 315 I 335 ¾ 375 a 0° ¾ 15° 7 May 2, 2008 HT8970 16-pin SOP (300mil) Outline Dimensions 1 6 9 A B 1 8 C C ' G H D E Symbol Rev. 1.10 a F Dimensions in mil Min. Nom. Max. A 394 ¾ 419 B 290 ¾ 300 C 14 ¾ 20 C¢ 390 ¾ 413 D 92 ¾ 104 E ¾ 50 ¾ F 4 ¾ ¾ G 16 ¾ 50 H 4 ¾ 12 a 0° ¾ 10° 8 May 2, 2008 HT8970 Product Tape and Reel Specifications Reel Dimensions D T 2 A C B T 1 SOP 16W (300mil) Symbol Description A Reel Outer Diameter B Reel Inner Diameter C Spindle Hole Diameter D Key Slit Width Dimensions in mm 330±1 62±1.5 13.0±0.5 -0.2 2±0.5 T1 Space Between Flange 16.8+0.3 -0.2 T2 Reel Thickness 22.2±0.2 Rev. 1.10 9 May 2, 2008 HT8970 Carrier Tape Dimensions P 0 D P 1 t E F W C D 1 B 0 P K 0 A 0 SOP 16W (300mil) Symbol Description Dimensions in mm W Carrier Tape Width 16±0.2 P Cavity Pitch 12±0.1 E Perforation Position F Cavity to Perforation (Width Direction) 7.5±0.1 D Perforation Diameter 1.5+0.1 D1 Cavity Hole Diameter 1.5+0.25 P0 Perforation Pitch 4±0.1 P1 Cavity to Perforation (Length Direction) 2±0.1 A0 Cavity Length 10.9±0.1 B0 Cavity Width 10.8±0.1 K0 Cavity Depth 3±0.1 t Carrier Tape Thickness C Cover Tape Width Rev. 1.10 1.75±0.1 0.3±0.05 13.3 10 May 2, 2008 HT8970 Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 86-21-6485-5560 Fax: 86-21-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 5F, Unit A, Productivity Building, Gaoxin M 2nd, Middle Zone Of High-Tech Industrial Park, ShenZhen, China 518057 Tel: 86-755-8616-9908, 86-755-8616-9308 Fax: 86-755-8616-9722 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752 Fax: 86-10-6641-0125 Holtek Semiconductor Inc. (Chengdu Sales Office) 709, Building 3, Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016 Tel: 86-28-6653-6590 Fax: 86-28-6653-6591 Holtek Semiconductor (USA), Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, CA 94538 Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holtek.com Copyright Ó 2008 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. Rev. 1.10 11 May 2, 2008