HT12M 212 Decoder Doorbell Features · Operating voltage: 2.4V~5.0V · Current type D/A Output · Built-in AMP · HT12E encoder pair with · 2channel dual tone generator · Tone optional: Ding-Dong/Westminster tunes · One Pin oscillator · 16-pin DIP package General Description The main application area for the HT12M device is for remote control doorbells working together with HT12E. Containing all the functions of the Holtek HT12D decoder and with an added amplifier and melody generator, the device eliminates the need for customers to incorporate an external op-amp and melody generator IC within their product applications, in the process significantly reducing overall product costs. In addition to being fully compatible with the HT12D circuitry, the device includes the following features; internal Inverting AMP with can also operate as standard independent inverter, internal 2 channel tone generator and current type Audio output. Block Diagram O S C I O s c illa to r C ir c u it D iv id e r T o n e G e n e ra to r A M P D IN A M P C ir c u it C o m p a ra to r A U D T E S T V S S V D D C o n tro l C iir c u it A d d re s s C ir c u it A 0 B U S Y A 7 Pin Assignment A 0 1 1 6 V D D A 1 2 1 5 T E S T A 2 3 1 4 V T A 3 4 1 3 O S C I A 4 5 1 2 A M P A 5 6 1 1 D IN A 6 7 1 0 A U D A 7 8 9 V S S H T 1 2 M 1 6 D IP -A Rev. 1.00 1 March 25, 2002 HT12M Pad Assignment 1 4 1 3 O S C I 1 5 V T A 0 V D D 1 6 T E S T A 1 1 A 2 Pad Coordinates 1 1 1 2 2 A 3 1 0 A M P 3 A 4 4 A 5 D IN 9 (0 , 0 ) 5 A 6 A 7 V S S Pad No. X Y 1 -610.00 701.90 2 -622.00 461.60 3 -622.00 350.60 4 -622.00 239.70 5 -616.00 -695.20 6 -502.00 -695.20 7 -388.50 -687.70 8 -87.95 575.80 575.80 308.30 22.10 -122.40 -270.40 -647.80 172.40 444.20 660.40 635.90 638.40 701.90 15 -384.50 701.90 16 -495.50 701.90 9 10 11 12 13 14 8 7 6 A U D Unit: mm Chip Size: 1530 ´ 1690 mm * The IC substrate should be connected to VSS in the PCB layout artwork. Pin Description Pin No. 1~8 Pin Name A0~A7 I/O Internal Connection I NMOS Open Drain Description Address pin. 9 VSS ¾ ¾ 10 AUD O PMOS Open Drain 11 DIN I COMS In Serial data input 12 AMP O CMOS Amp feed back 13 OSCI I ¾ 14 VT O CMOS 15 TEST I CMOS In 16 VDD ¾ ¾ Negative power supply, ground Audio out Oscillator input pin. Busy, data valid Test pin. Positive power supply Absolute Maximum Ratings Supply Voltage ........................................-0.3V to 5.5V Storage Temperature ...........................-50°C to 125°C Input Voltage .............................VSS-0.3V to VDD+0.3V Operating Temperature ..........................-25°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. Rev. 1.00 2 March 25, 2002 HT12M D.C. Characteristics Symbol VDD Test Conditions Parameter Conditions VDD ¾ Operating Voltage ¾ Min. Typ. Max. Unit 2.4 ¾ 5 V 5V OSC stop amp off ¾ 0.1 1 mA 5V OSC stop amp on ¾ 10 20 mA ISTB Standby Current IDD Operating Current 5V No load fOSC=150kHz ¾ 1.5 2 mA IAUD AUD output current 5V Transistor B load 3 5 ¾ mA VT Output Source Current 5V VOH=4.5V -2 -3 ¾ mA VT Output Sink Current 5V VOL=0.5V 2 3 ¾ mA VIH High Input Voltage 5V ¾ 3.5 ¾ 5 V VIL Low Input Voltage 5V ¾ 0 ¾ 1 V fOSC Oscillator Frequency 5V ¾ 190 ¾ kHz IVT ROSC=820kW Functional Description Built-in inverter amp Single tone has 4 second total length, dual tone has 1 second total length. A M P R F In p u t 1 s e c D a ta O u t 3 s e c Trigger mode V T O n e -s h o t 3 .2 s e c O n e -s h o t T w ic e W e s tm in s te s tu re The Ding-Dong sound: is determined by the D8~D11 pins on the HT12E. While the Re-trigger/Non-trigger function is determined by the D11 pin on the HT12E. D11 D10 D9 D8 Sound Notes 1 0 0 0 Me 1 2 0 0 1 Me Do 2 3 0 1 0 Me Do ¾ Me Do Repeat 4 0 1 1 Me/Do Single tone 5 1 0 0 Me Do Re So ¾ So Re Me Do Westminster tune 6 1 0 1 Me/Do Do/So Double tone 7 1 1 0 So Re Me Do 4 8 1 1 1 Me/Do Do/So ¾ Me/Do Do/So Dual Tone-repeat Section time: 0.8secretary ´ 2 = 1.6sec Rev. 1.00 3 March 25, 2002 HT12M Application Circuit HT12E/HT12M pairing application circuit T r a n s m itte r C ir c u it R e c e iv e r C ir c u it V A d d re s s D D A d d re s s H T 1 2 M H T 1 2 E D a ta Using internal OP amplifier circuit V D D A N T E N N A R F V D D D IN A M P C 9 4 5 1 T E S T A 0 2 A 1 3 A 2 4 A U D 5 A 3 A 4 6 V T 7 A 5 8 A 6 O S C I A 7 V S S H T 1 2 M Rev. 1.00 4 March 25, 2002 HT12M Using external OP amplifier circuit V D D A N T E N N A R F O P A m p V D D D IN T E S T A M P 1 A 0 2 A 1 3 A 2 4 A U D 5 A 3 A 4 6 V T 7 A 5 8 A 6 O S C I A 7 V S S H T 1 2 M Typical RF-Receiver circuit V D D R F -O U T 7 p F 3 9 p F 2 0 2 1 8 1 5 3 p F 2 0 2 6 .8 2 0 2 Rev. 1.00 5 March 25, 2002 HT12M Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Sales Office) 11F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Hong Kong) Ltd. RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Holtek Semiconductor (Shanghai) Inc. 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holmate Technology Corp. 48531 Warm Springs Boulevard, Suite 413, Fremont, CA 94539 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright Ó 2002 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 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. 1.00 6 March 25, 2002