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312 Series of Encoders
Features
* * * *
Operating voltage: 2.4V~12V Low power and high noise immunity CMOS technology Low standby current Minimum transmission word - Four words for TE trigger - One word for Data trigger
* * * *
Built-in oscillator needs only 5% resistor Easy interface with an RF or an infrared transmission medium Minimal external components Package information: refer to Selection Table
Applications
* * * *
Burglar alarm system Smoke and fire alarm system Garage door controllers Car alarm system
* * *
Security system Cordless telephones Other remote control systems
General Description
The 312 encoders are a series of CMOS LSIs for remote control system applications. They are capable of encoding 12 bits of information which consists of N address bits and 12-N data bits. Each address/data input is externally trinary programmable if bonded out. They are otherwise set floating internally. Various packages of the 3 12 encoders offer flexible combinations of programmable address/data which meet various applications. The programmable address/data is transmitted together with the header bits via an RF or an infrared transmission medium upon receipt of a trigger signal. A TE (HT6010) or a DATA (HT6012/HT6014) trigger can be selectedforapplicationflexibility.
Selection Table
Part No. Function Address Address/ No. Data No. 8 10 8 4 0 0 Data No. 0 2 4 Oscillator RC oscillator RC oscillator RC oscillator Trigger TE D10~D11 D8~D11 LED Indicator No Yes Yes Package 18/20 DIP 20 SOP 18 DIP/20 SOP 18 DIP/20 SOP
HT6010 HT6012 HT6014
Note: Address/Data represents addressable pins or data according to the requirements of decoders.
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312 Series of Encoders
Block Diagram
TE trigger HT6010
OSC2 OSC1
O s c illa to r TE A0
3 D iv id e r
D a ta S e le c t a n d B u ffe r
DOUT
A7
12 T r a n s m is s io n G a te C ir c u it
1 2 C o u n te r and 1 of12 D e c o d e rs
S ync. C ir c u it
T r in a r y D e te c to r
AD8
AD 11
VDD
VSS
DATA trigger HT6012/HT6014
OSC2 OSC1
O s c illa to r
3 D iv id e r
D a ta S e le c t a n d B u ffe r
DOUT
A d d re s s
12 T r a n s m is s io n G a te C ir c u it
1 2 C o u n te r and 1 of12 D e c o d e rs
S ync. C ir c u it
T r in a r y D e te c to r
LED
C ir c u it
LED
D a ta
VDD
VSS
Note: The address/data pins are available in various combinations (refer to the address/data table).
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312 Series of Encoders
Pin Assignment
T E tr ig g e r ty p e 8 -A d d re s s 4 -A d d r e s s /D a ta
A0 1 2 3 4 5 6 7 8 9 A1 A2 A3 A4 A5 A6 A7 VSS 18 17 16 15 14 13 12 11 10 VDD DOUT OSC2 OSC1 TE AD 11 AD 10 AD9 AD8
8 -A d d re s s 4 -A d d r e s s /D a ta
NC 1 2 3 4 5 6 7 8 9 10 A0 A1 A2 A3 A4 A5 A6 A7 VSS 20 19 18 17 16 15 14 13 12 11 NC VDD DOUT OSC2 OSC1 TE AD 11 AD 10 AD9 AD8
HT6010 1 8 D IP DATA tr ig g e r ty p e
HT6010 2 0 D IP /S O P
1 0 -A d d re s s 2 -D a ta
A0 A1 A2 A3 A4 A5 A6 A7 VSS 9 8 7 6 5 4 3 2 1 18 17 16 15 14 13 12 11 10 VDD DOUT OSC2 OSC1 LED D11 D10 A9 A8
1 0 -A d d re s s 2 -D a ta
NC 1 2 3 4 5 6 7 8 9 10 A0 A1 A2 A3 A4 A5 A6 A7 VSS 20 19 18 17 16 15 14 13 12 11 NC VDD DOUT OSC2 OSC1 LED D11 D10 A9 A8
8 -A d d re s s 4 -D a ta
A0 A1 A2 A3 A4 A5 A6 A7 VSS 9 8 7 6 5 4 3 2 1 18 17 16 15 14 13 12 11 10 VDD DOUT OSC2 OSC1 LED D11 D10 D9 D8
HT6012 1 8 D IP 8 -A d d re s s 4 -D a ta
NC 1 2 3 4 5 6 7 8 9 10 A0 A1 A2 A3 A4 A5 A6 A7 VSS 20 19 18 17 16 15 14 13 12 11 NC VDD DOUT OSC2 OSC1 LED D11 D10 D9 D8
HT6012 20 SO P
HT6014 1 8 D IP
HT6014 20 SO P
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312 Series of Encoders
Pin Description
Pin Name A0~A9 AD8~AD11 D8~D11 DOUT LED TE OSC1 OSC2 VSS VDD I/O I I I O O I I O 3/4 3/4 Internal Connection Description
TRANSMISSION Input pins for address A0~A9 setting GATE They can be externally set to VDD or VSS or left open. TRANSMISSION Input pins for address/data (AD8~AD11) setting GATE They can be externally set to VDD or VSS or left open. CMOS IN Pull-high CMOS OUT NMOS OUT CMOS IN Pull-high OSCILLATOR OSCILLATOR 3/4 3/4 Input pins for data (D8~D11) setting and transmission enable (active low) They can be externally set to VSS or left open (see Note). Encoder data serial transmission output Transmission enable indicator, active low Transmission enable, active low (see Note) Oscillator input pin Oscillator output pin Negative power supply, ground Positive power supply
Note: D8~D11 are data input and transmission enable pins of the HT6012/HT6014. TE is the transmission enable pin of the HT6010. Approximate internal connections
T R A N S M IS S IO N GATE C M O S IN P u ll- h ig h CMOS OUT NMOS OUT
O S C IL L A T O R
EN OSC1
OSC2
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312 Series of Encoders
Absolute Maximum Ratings
Supply Voltage...............................-0.3V to 13V Input Voltage....................VSS-0.3 to VDD+0.3V Storage Temperature.................-50C to 125C Operating Temperature ..............-20C to 75C
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.
Electrical Characteristics
Symbol VDD ISTB IDD ILED IDOUT VIH VIL fOSC RTE RDATA Parameter Operating Voltage Standby Current Operating Current LED Sink Current Output Drive Current H Input Voltage L Input Voltage Oscillator Frequency TE Pull-high Resistance D8~D11 Pull-high Resistance Test Conditions VDD 3/4 3V 12V 3V 12V 5V 5V 5V 3/4 3/4 5V 5V 5V VTE=0V VDATA=0V Conditions 3/4 Oscillator stops No load fOSC=3kHz VLED=0.5V VOH=0.9VDD (Source) VOL=0.1VDD (Sink) 3/4 3/4 ROSC=1MW Min. 2.4 3/4 3/4 3/4 3/4 1.5 -0.6 0.6 0.8VDD 0 3/4 3/4 3/4 Typ. 5 0.1 2 250 600 3 -1.2 1.2 3/4 3/4 3 1.5 1.5 Max. 12 1 4 500 1200 3/4 3/4 3/4 VDD
Ta=25C Unit V mA mA mA mA mA mA mA V V kHz MW MW
0.2VDD 3/4 3 3
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Functional Description
Operation The 312 series of encoders begin with a four (HT6010) or a one (HT6012/HT6014) word transmission cycle upon receipt of a transmission enable (TE for the HT6010 or D8~D11 for the HT6012/HT6014, active low). This cycle will repeat itself as long as the transmission enable (TE or D8~D11) is held low. Once the transmission enable returns high the encoder output completes its final cycle and then stops as shown below.
TE or D8~D11 < 1 w o rd E ncoder D a ta O u t 1 or4 w o rd s
1 o r 4 w o rd s
T r a n s m itte d C o n tin u o u s ly
Transmission timing Information word An information word is composed of four periods as shown:
1 /6 b it s y n c . p e r io d p ilo t p e r io d ( 6 b its ) a d d r e s s c o d e p e r io d d a ta c o d e p e r io d
Composition of information
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312 Series of Encoders
Address/data waveform Each programmable address/data pin can be externally set to one of the following three logic states:
fO
SC
"O n e " "Z e ro " "O p e n " A d d r e s s /D a ta B it
Address/Data bit waveform The Open state data input is interpreted as logic high by the decoder since its output has only two states. Address/data programming (preset) The status of each address/data pin can be individually preset to a logic high, low, or floating. If a transmission enable signal is applied, the encoder scans and transmits the status of the 12 bits of address/data serially in the order A0 to AD11 for the HT6010 and A0 to D11 for the HT6012/HT6014. If the trigger signal is not applied, the chip only consumes a standby current which is less than 1mA (for VDD=5V). The address pins are usually preset so as to transmit data codes with their own particular security codes by the DIP switches or PCB wiring, while data is selected using push button or electronic switches. Address/Data sequence The following table provides the position of the address/data sequence for various models of the 312 series encoders. A correct device should be selected according to the requirements of the individual address and data. Part No. HT6010 HT6012 HT6014 Address/Data Bits 0 A0 A0 A0 1 A1 A1 A1 2 A2 A2 A2 3 A3 A3 A3 4 A4 A4 A4 5 A5 A5 A5 6 A6 A6 A6 7 A7 A7 A7 8 AD8 A8 D8 9 AD9 A9 D9 10 D10 D10 11 D11 D11 AD10 AD11
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312 Series of Encoders
Transmission enable For the TE trigger type of encoders, transmission is enabled by applying a low signal to the TE pin. But for the Data trigger type, it is enabled by applying a low signal to one of the data pins D8~D11. Flowchart
Pow eron
S ta n d b y m o d e
No
T r a n s m is s io n e n a b le d ? Yes C o d e w o rd tr a n s m itte d c o n tin u o u s ly
No
T r a n s m is s io n s till e n a b le d ? Yes C o d e w o rd tr a n s m itte d c o n tin u o u s ly
Note: D8~D11 are transmission enable of the HT6012/HT6014. TE is the transmission enable of the HT6010.
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312 Series of Encoders
Oscillator frequency vs supply voltage
fO S C (S c a le ) R 7 .0 0 470k 510k 6 .0 0 560k 620k 5 .0 0 680k 750k 4 .0 0 820k 910k 1 .0 M (3 k H z )3 .0 0 1 .2 M 1 .5 M 2 .0 0 2 .0 M 1 .0 0
OSC
(W )
2
3
4
5
6
7
8
9
10
11
12
13 V
DD
(V D C )
The recommended oscillator frequency is fOSCD (decoder) @ 33 fOSCE (encoder)
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312 Series of Encoders
Application Circuits
T r a n s m itte r C ir c u it V 1 2 3 4 5 6 7 8 9 A0 A1 A2 A3 A4 A5 A6 A7 VSS VDD DOUT 18 1 2 3 R
OSC DD
T r a n s m itte r C ir c u it V A0 A1 A2 4 5 6 7 8 9 A3 A4 A5 A6 A7 VSS VDD DOUT 18 17 R
DD
17
O SC2 16 O SC1 15 TE 14 AD11 13 AD10 12 AD9 11 AD8 10
O SC2 16 O SC1 15 LED 14 D11 13 D10 12 A9 11 A8 10
OSC
R
HT6010
HT6012
T r a n s m itte r C ir c u it V 1 2 3 4 5 6 7 8 9 A0 A1 A2 A3 A4 A5 A6 A7 VSS VDD DOUT 18 17 R
DD
O SC2 16 O SC1 15 LED 14 D11 13 D10 12 D9 11 D8 10
OSC
R
HT6014
Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.) Typical RF transmitter: JR-220 (JUWA CORP.) TX-99 (MING MICROSYSTEM, U.S.A.)
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Holtek Semiconductor Inc. (Headquarters) No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. 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 Copyright O 1999 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.
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