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HT12M 212 Decoder Doorbell
Features
* Operating voltage: 2.4V~5.0V * Built-in AMP * 2-channel dual tone generator * One pin oscillator * Current type D/A output * Tone optional: Ding-Dong/Westminsters tunes * Pair with HT12E encoder * 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 tone generator, the device eliminates the need for customers to incorporate an external op-amp and tone 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
F .B D IN VDD VSS TEST
C o m p a ra to r
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 F .B D IN AUD VSS
H T12M 1 6 D IP -A
Rev. 1.10
1
July 14, 2003
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 2 3
10 F .B
Unit: mm 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 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
4 5 6 7 8 9 10 11 12 13 14 15 16
5 6 A6
7
8 AUD
A7VSS
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 F.B 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 ..........................VSS-0.3V to VSS+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. 1.10
2
July 14, 2003
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 F 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 t m in s t e r 's Tune
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 Mi Mi Do Mi Do 3/4 Mi Do Mi/Do Mi Do Re Sol 3/4 Sol Re Mi Do Mi/Do Do/Sol Sol Re Mi Do Mi/Do Do/Sol 3/4 Mi/Do Do/Sol Sound 1 2 Repeat Single tone Westminsters tune Double tone 4 Dual Tone-repeat Notes
Note: Section time: 0.8sec 2 = 1.6sec Rev. 1.10 3 July 14, 2003
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
SPK 8W
HT12E
D a ta
A d d re s s
HT12M
Using Internal OP Amplifier Circuit
V ANTENNA 1M W 0 .1 m F 10M W 0 .0 1 m F 4 7 k W C945 VDD TEST SPK 8W AUD VT OSCI VSS 1kW 820kW 8050
DD
RF
D IN 5 .6 M W 1 2 3 4 5 6 7 8 F .B A0 A1 A2 A3 A4 A5 A6 A7
HT12M
Rev. 1.10
4
July 14, 2003
HT12M
Using External OP Amplifier Circuit
V ANTENNA
DD
RF
OP Amp
1 2 3 4 5 6 7 8
D IN F .B A0 A1 A2 A3 A4 A5 A6 A7
VDD TEST SPK 8W AUD VT OSCI VSS 1kW 820kW 8050
HT12M
Typical RF-Receiver Circuit
V
DD
R F -O U T 202 39pF 7pF
1815 202 6 .8
3pF
202
Rev. 1.10
5
July 14, 2003
HT12M
Package Information
16-pin DIP (300mil) Outline Dimensions
A 16 B 1 9 8
H C D E F G
a
I
Symbol A B C D E F G H I a
Dimensions in mil Min. 745 240 125 125 16 50 3/4 295 335 0 Nom. 3/4 3/4 3/4 3/4 3/4 3/4 100 3/4 3/4 3/4 Max. 775 260 135 145 20 70 3/4 315 375 15
Rev. 1.10
6
July 14, 2003
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 (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 Holtek Semiconductor (Hong Kong) Ltd. Block A, 3/F, Tin On Industrial Building, 777-779 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Holmate Semiconductor, Inc. 46712 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright O 2003 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. Holteks 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
7
July 14, 2003

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