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HT12M 212 Decoder Doorbell
Features
* Operating voltage: 2.4V~5.0V * Built-in AMP * 2channel dual tone generator * One Pin oscillator * Current type D/A Output * HT12E encoder pair with * Tone optional: Ding-Dong/Westminster tunes * 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
OSCI
O s c illa to r C ir c u it AMP C ir c u it
D iv id e r
Tone G e n e ra to r
AUD TEST
AMP D IN
C o m p a ra to r
VSS VDD
A d d re s s C ir c u it
C o n tro l C iir c u it
BUSY
A0
A7
Pin Assignment
A0 A1 A2 A3 A4 A5 A6 A7 8 7 6 5 4 3 2 1 16 15 14 13 12 11 10 9 VDD TEST VT OSCI AMP D IN AUD VSS
H T12M 1 6 D IP -A
Rev. 1.00
1
March 25, 2002
HT12M
Pad Assignment
TEST OSCI VDD VT A1 1 2 3 4 9 (0 , 0 ) D IN 16 A0 15
Pad Coordinates
Pad No. 1 X -610.00 -622.00 -622.00 -622.00 -616.00 -502.00 -388.50 -87.95 575.80 575.80 308.30 22.10 -122.40 -270.40 -384.50 -495.50 Y
Unit: mm
701.90 461.60 350.60 239.70 -695.20 -695.20 -687.70 -647.80 172.40 444.20 660.40 635.90 638.40 701.90 701.90 701.90
A2 A3 A4 A5
14
13
12
11 10 AMP
2 3 4 5 6 7 8 9 10 11 12 13 14
5 6 A6
7
8 AUD
15
A7VSS
16
Chip Size: 1530 1690 mm * The IC substrate should be connected to VSS in the PCB layout artwork.
Pin Description
Pin No. 1~8 9 10 11 12 13 14 15 16 Pin Name A0~A7 VSS AUD DIN AMP OSCI VT TEST VDD I/O I 3/4 O I O I O I 3/4 Internal Connection NMOS Open Drain 3/4 PMOS Open Drain COMS In CMOS 3/4 CMOS CMOS In 3/4 Address pin. Negative power supply, ground Audio out Serial data input Amp feed back Oscillator input pin. Busy, data valid Test pin. Positive power supply Description
Absolute Maximum Ratings
Supply Voltage ........................................-0.3V to 5.5V Input Voltage .............................VSS-0.3V to VDD+0.3V Storage Temperature ...........................-50C to 125C Operating Temperature ..........................-25C to 70C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings 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 ISTB IDD IAUD IVT VIH VIL fOSC Parameter Operating Voltage Standby Current 5V Operating Current AUD output current VT Output Source Current VT Output Sink Current High Input Voltage Low Input Voltage Oscillator Frequency 5V 5V 5V 5V 5V 5V 5V OSC stop amp on No load fOSC=150kHz Transistor B load VOH=4.5V VOL=0.5V 3/4 3/4 ROSC=820kW Test Conditions VDD 3/4 5V Conditions 3/4 OSC stop amp off Min. 2.4 3/4 3/4 3/4 3 -2 2 3.5 0 3/4 Typ. 3/4 0.1 10 1.5 5 -3 3 3/4 3/4 190 Max. 5 1 20 2 3/4 3/4 3/4 5 1 3/4 Unit V mA mA mA mA mA mA V V kHz
Functional Description
Built-in inverter amp
AMP R . In p u t D a ta O u t
1 sec 3 sec
Single tone has 4 second total length, dual tone has 1 second total length.
Trigger mode
VT O n e -s h o t O n e -s h o t T w ic e W e s tm in s te s tu re
3 .2 s e c
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 1 2 3 4 5 6 7 8 D10 0 0 0 0 1 1 1 1 D9 0 0 1 1 0 0 1 1 D8 0 1 0 1 0 1 0 1 Me Me Do Me Do 3/4 Me Do Me/Do Me Do Re So 3/4 So Re Me Do Me/Do Do/So So Re Me Do Me/Do Do/So 3/4 Me/Do Do/So Sound 1 2 Repeat Single tone Westminster tune Double tone 4 Dual Tone-repeat Notes
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
DD
A d d re s s
A d d re s s
HT12E
D a ta
HT12M
Using internal OP amplifier circuit
V ANTENNA
DD
R.
C945 1 2 3 4 5 6 7 8
D IN AMP A0 A1 A2 A3 A4 A5 A6 A7
VDD TEST
AUD VT OSCI VSS
HT12M
Rev. 1.00
4
March 25, 2002
HT12M
Using external OP amplifier circuit
V ANTENNA
DD
R.
OP Amp
1 2 3 4 5 6 7 8
D IN AMP A0 A1 A2 A3 A4 A5 A6 A7
VDD TEST
AUD VT OSCI VSS
HT12M
Typical RF-Receiver circuit
V
DD
R . -O U T 202 39p. 7p.
1815 202 6 .8
3p.
202
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 O 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

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