HT8950/HT8950A Voice Modulator Features · Operating voltage: 2.4V~4.0V · 8-bit A/D and D/A converters · On-chip SRAM · LED indicator with voice level · Robot function · Push button selection or electronic mode · Vibrato function · Minimal external components · 8kHz sampling rate · HT8950: 18-pin DIP package HT8950A: 16-pin DIP package · 7-step level shifting Applications · Educational Toys/leisure products · Audio system · Mixers · Speech system · Recorders · Telephone system General Description from the two groups of pins namely, SW0, SW1 and SW2 for electronic direct selection and ROB, TGD, TGU and VIB for push button selection. The HT8950/HT8950A are single chip CMOS LSI voice modulator ICs which provide seven steps to shift the frequency of an input voice, producing a dramatic change in the output. The HT8950/HT8950A include a built-in microphone amplifier with an internal bias, an 8-bit A/D converter, a built-in SRAM as well as a current output type 8-bit D/A converter. The 8-bit A/D and D/A converters with a sampling rate of 8kHz ensures a high quality and high S/N ratio output voice. The chips provide an LED indicator which flashes in accordance with the volume of the input voices. The HT8950/HT8950A provide two special effects: Vibrato and Robot. The Vibrato effect is generated by alternating the frequency of an input signal up and down at a rate of 8Hz. The Robot function, on the other hand, converts an input voice into a Robot voice. Both effects can be selected depending on which pin is triggered, either ROB or VIB. For the output frequency level shifting, the chips provide seven steps which can be selected Pin Assignment S W 0 1 1 8 R O B S W 1 2 1 7 T G D O S C 1 1 1 6 O S C 2 S W 2 3 1 6 T G U V IB 2 1 5 F V IB V S S 4 1 5 V IB T G U 3 1 4 T S A O 5 1 4 O S C 1 T G D 4 1 3 V R E F A IN 6 1 3 O S C 2 R O B 5 1 2 A U D IO V D D 7 1 2 F V IB V S S 6 1 1 L A M P L A M P 8 1 1 T S N C 7 1 0 V D D A U D IO 9 1 0 V R E F A O 8 9 A IN H T 8 9 5 0 1 8 D IP -A Rev. 1.10 H T 8 9 5 0 A 1 6 D IP -A 1 November 16, 2006 HT8950/HT8950A Block Diagram T G U O S C 1 O s c illa to r G e n e ra to r O S C 2 T G D V IB R O B P o w e r O n C ir c u it C o n tro l C ir c u it T im e B a s e G e n e ra to r F V IB S W 0 A O S W 1 A IN S W 2 S R A M D /A C o n v e rte r L a tc h V R E F A U D IO V S S A /D C o n v e rte r V D D T S L A M P Unit: mm Pad Coordinates O S C 2 F V IB 1 7 1 6 1 5 1 4 2 T G D 1 3 T S V R E F 3 R O B S W 0 ( 0 ,0 ) 4 5 S W 1 1 2 6 S W 2 V S S O S C 1 1 V IB T G U 1 8 Pad No. 8 7 9 1 0 1 1 A U D IO L A M P X Y Pad No. X Y 1 -957.0 720.5 10 732.0 -774.0 2 -957.0 423.5 11 984.0 -675.0 3 -957.0 210.0 12 956.5 -400.0 4 -957.0 -87.0 13 956.5 374.5 5 -957.0 -299.5 14 956.5 671.5 6 -957.0 -596.5 15 530.5 765.5 7 -962.0 -815.0 16 345.50 765.5 8 -161.5 -747.5 17 -33.50 765.5 9 200.5 -747.5 18 -287.50 765.5 V D D A IN A O Chip size: 2350´2080 (mm)2 The IC substrate should be connected to VSS in the PCB layout artwork. Pin Description (HT8950) Pin No. Pin Name I/O Internal Connection Description 1~3 SW0~SW2 I Pull-High 4 VSS I ¾ Negative power supply, ground 5 AO O ¾ Internal amplifier output 6 AIN I ¾ Internal amplifier input (inverted) 7 VDD O ¾ Positive power supply O NMOS Open Drain 8 Rev. 1.10 LAMP Function setting pin (for electronic setting) Lamp output (the brightness changes with the voice volume) 2 November 16, 2006 HT8950/HT8950A Pin No. Pin Name I/O Internal Connection Description 9 AUDIO O PMOS Open Drain 10 VREF I ¾ Internal amplifier reference voltage 11 TS I ¾ For IC test only 12 FVIB O ¾ Vibrato frequency control 13 OSC2 O ¾ Oscillator output 14 OSC1 I ¾ Oscillator input 15 VIB I Pull-High Switch to Vibrato mode (toggle) 16 TGU I Pull-High Switch to Upward step mode 17 TGD I Pull-High Switch to Downward step mode (internal pull-high) 18 ROB I Pull-High Switch to Robot mode (internal pull-high) Audio output Absolute Maximum Ratings Supply Voltage ...........................VSS-0.3V to VSS+4.5V 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 Ta=25°C Test Conditions Symbol Parameter VDD Conditions ¾ Min. Typ. Max. Unit 2.4 3.0 4.0 V ¾ 2.0 10 mA ¾ ¾ 580 mV mA VDD Operating Voltage ¾ IOP Operating Current 3V VIN Input Signal 3V ILAMP Lamp Sink Current 3V VOL=1.3V 5.0 9.5 ¾ AV OPA Gain Value 3V Open loop ¾ 2000 ¾ IO Audio Output Voltage 3V During silence ¾ -1 ¾ mA VIH High Input Voltage ¾ ¾ 0.7VDD ¾ ¾ V VIL Low Input Voltage ¾ ¾ ¾ ¾ 0.3VDD V fOSC Oscillating Frequency 3V ¾ 512 ¾ kHz Rev. 1.10 No load, fOSC=640kHz ¾ ROSC=47kW 3 November 16, 2006 HT8950/HT8950A Functional Description Voice Modulation The HT8950/HT8950A are single chip LSIs designed for voice modulation. These devices provide seven steps to shift the frequency of an input voice signal up and down. The chips are also equipped with two special effects; Vibrato and Robot. The HT8950/HT8950A provide an 8-bit A/D and D/A converters with a sampling rate of 8kHz, ensuring a high quality voice output and with a high S/N ratio. The chips include seven steps to shift the frequency of an input signal. The voice modulation is selected and determined by the SW0~SW2 inputs. The HT8950/HT8950A include a built-in amplifier, 8-bit A/D converter and current output type of 8-bit D/A converter in addition to a built-in SRAM. The brightness of the LED indicator changes with the volume of the input voice signal. Input Step Mode SW2 SW1 SW0 Speed Ratio Power on Initial 1 1 1 Controlled by TGU and Notes TDG The HT8950/HT8950A enter the Robot state right after power is initially switched on. 1 1 0 UP3 2 1 0 1 UP2 8/5 1 0 0 UP1 4/3 0 1 1 NORMAL 0 1 0 DN1 8/9 0 0 1 DN2 4/5 0 0 0 DN3 2/3 Robot State The system goes into the Robot state after the ROB pin is triggered or power is turned on. In this mode, an input voice can be converted into a robot voice. Vibrato An output voice will be generated with a vibrato effect when the VIB pin is triggered, regardless of what state the system is in. The vibrato effect is toggle activated. In other words, when a voice output is playing with a vibrato effect, this effect can be eliminated by retriggering the VIB pin. The rate of vibrato effect can be changed by adjusting the resistance of the external resistor between the OSC2 and FVIB pins. 1 Notes: The TGU switch increments by one step mode, and the TGD switch, on the other hand, decrements by one step mode, step by step as shown: · The system changes to the Robot state after the ROB pin is triggered, regardless of what state the system is in. · A voice output is accompanied with a vibrato effect af- ter the VIB pin is triggered, regardless of what state the system is in. LED Indicator The HT8950/HT8950A provide a LAMP pin to drive an external LED. The brightness of the LED changes with the volume of the input voice signal. T G U * R O B O T T G U T G U D N 3 T G D T G U D N 2 T G D T G U D N 1 T G D T G U T G D T G U U P 1 N O R M A L T G D T G U U P 2 T G D U P 3 T G D T G D Rev. 1.10 4 November 16, 2006 HT8950/HT8950A Application Circuits HT8950 with HT82V733 Power Amplifier and a 6V Power Supply 1 2 3 4 3 3 k W 6 7 8 9 4 7 0 W 0 .1 m F R O B S W 1 T G D S W 2 T G U V S S 5 4 .7 k W S W 0 1 6 O S C 1 A IN O S C 2 V D D F V IB 1 3 4 7 k W 1 2 1 0 0 k W 1 0 V R E F 2 A u d io In 3 0 .1 m F 1 m F 5 0 k W 0 .0 3 3 m F 8 V D D 4 .7 m F /1 0 V 3 3 k W 5 1 0 W 1 0 0 m F /1 0 V 1 4 H T 8 9 5 0 2 2 m F /1 0 V 0 .1 m F 3 .6 V 1 1 T S A U D IO V C C 4 .5 V 1 5 A O L A M P 4 7 0 W 1 7 V IB 4 .7 k W M IC 1 8 V S S C E H T 8 2 V 7 3 3 V R E F O U T N N C O U T P 6 7 4 7 m F 4 5 1 S P K HT8950A with HT82V733 Power Amplifier and a 6V Power Supply 1 0 0 k W 4 7 k W 1 O S C 1 2 V IB 3 5 6 7 T G D V R E F R O B A U D IO V S S L A M P 1 3 A IN 4 .7 m F /1 0 V 3 .6 V 1 1 1 0 0 m F / 1 0 V 3 3 k W 1 0 5 1 0 W 9 0 .0 3 3 m F 4 7 0 W 0 .1 m F M IC 2 5 0 k W 3 4 .7 k W 3 3 k W 8 V D D A u d io In 0 .1 m F H T 8 9 5 0 A Rev. 1.10 0 .1 m F V C C 4 .5 V 1 2 V D D A O 3 3 0 W 1 4 T S N C 8 1 5 F V IB T G U 4 1 6 O S C 2 1 m F 4 .7 k W V S S C E H T 8 2 V 7 3 3 V R E F O U T N N C O U T P 6 7 4 7 m F 4 5 1 S P K 2 2 m F /1 0 V 5 November 16, 2006 HT8950/HT8950A HT8950 with a Transistor Output Stage and a 6V Power Supply 1 2 3 4 3 3 k W 5 7 8 S W 1 T G D S W 2 T G U A O O S C 1 A IN O S C 2 V D D F V IB M IC 1 6 1 0 0 m F /1 0 V 0 .1 m F 3 .6 V 1 5 1 4 1 3 4 7 k W 1 2 1 0 0 k W 0 .1 m F A 7 3 3 1 1 8 0 5 0 1 5 0 W 1 0 V R E F 1 0 0 m F /1 0 V 6 8 W H T 8 9 5 0 4 .7 k W V C C 6 V 1 7 T S A U D IO 0 .1 m F 4 7 0 W 1 8 V IB L A M P 9 4 7 0 W R O B V S S 6 4 .7 k W S W 0 4 .7 m F /1 0 V 8 0 5 0 3 3 0 W S P K 4 7 0 W 2 2 m F /1 0 V 0 .1 m F 2 .4 k W 2 0 0 W HT8950A with a Transistor Output Stage and a 6V Power Supply 1 0 0 k W 4 7 k W 1 O S C 1 2 V IB 3 T G U T G D V R E F R O B A U D IO V S S L A M P 8 N C V D D A O A IN 4 7 0 W 1 4 T S 5 7 1 5 F V IB 4 6 1 6 O S C 2 1 3 4 .7 m F /1 0 V V C C 6 V 0 .1 m F 3 .6 V 1 0 0 m F /1 0 V 1 2 1 1 3 3 0 W 1 0 2 .4 k W 0 .1 m F 9 A 7 3 3 2 0 0 W 4 7 0 W H T 8 9 5 0 A 8 0 5 0 1 5 0 k W 1 0 0 m F /1 0 V 4 .7 k W 3 3 k W 0 .1 m F M IC 4 .7 k W 6 8 W 2 2 m F /1 0 V 8 0 5 0 S P K 4 7 0 W Rev. 1.10 6 November 16, 2006 HT8950/HT8950A HT8950 with HT82V733 Power Amplifier and a 6V Power Supply 1 S W 0 2 3 4 0 .0 4 7 m F 5 3 9 k W 6 7 4 .7 k W 0 .1 m F 8 T G D S W 2 T G U V S S V IB A O O S C 1 A IN O S C 2 V D D F V IB T S V R E F A U D IO 1 8 4 7 0 W 1 6 5 1 0 W 1 4 1 3 4 7 k W 1 2 1 0 0 k W 1 1 8 V D D A u d io In 1 0 2 4 .7 m F / 1 0 V V S S C E H T 8 2 V 7 3 3 V R E F O U T N N C O U T P 6 7 3 1 m F 5 0 k W 0 .0 3 3 m F 1 0 0 m F /1 0 V 0 .1 m F 3 .6 V 1 5 3 3 k W 2 2 m F /1 0 V V C C 4 .5 V 1 7 H T 8 9 5 0 4 .7 k W M IC S W 1 L A M P B 9 4 7 0 W R O B 0 .1 m F 4 7 m F 4 5 1 S P K HT8950A with HT82V733 Power Amplifier and a 6V Power Supply 1 0 0 k W 4 7 k W 1 2 5 6 8 1 5 F V IB T G U 4 1 6 O S C 2 V IB 3 7 O S C 1 T G D V R E F R O B A U D IO V S S L A M P N C V D D A O A IN 4 7 0 W 1 4 T S 1 3 4 .7 m F /1 0 V 1 0 0 m F /1 0 V 1 1 1 0 3 3 k W 9 4 7 k W 0 .1 m F 3 9 k W Rev. 1.10 3 .6 V 1 2 H T 8 9 5 0 A 0 .0 4 7 m F 0 .1 m F V C C 4 .5 V M IC 4 7 0 W 5 0 k W 5 1 0 W 8 V D D A u d io In 0 .1 m F 0 .0 3 3 m F 2 3 4 .7 k W 1 m F 2 2 m F /1 0 V 7 4 7 m F 4 V S S C E H T 8 2 V 7 3 3 V R E F O U T N N C O U T P 6 7 5 1 S P K November 16, 2006 HT8950/HT8950A 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° 8 November 16, 2006 HT8950/HT8950A 18-pin DIP (300mil) Outline Dimensions A B 1 8 1 0 1 9 H C D E a G I F Symbol Rev. 1.10 Dimensions in mil Min. Nom. Max. A 895 ¾ 915 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° 9 November 16, 2006 HT8950/HT8950A 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) 5/F, Unit A, Productivity Building, Cross of Science M 3rd Road and Gaoxin M 2nd Road, Science Park, Nanshan District, Shenzhen, China 518057 Tel: 86-755-8616-9908, 86-755-8616-9308 Fax: 86-755-8616-9533 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 Holmate Semiconductor, Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, CA 94538 Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holmate.com Copyright 2006 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 10 November 16, 2006