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2
Features
* * * * * *
24
HT6P20 OTP Encoder
Operating voltage: 2V~12V Low power consumption Built-in oscillator needs only 5% resistor 0/2/4/8 data selectable 224 maximum address and data codes Easy interface with an RF or IR medium
* * * *
One time programmable process Data active: D0~D7 Minimal external components HT6P20/A/B: 8-pin DIP/NSOP package HT6P20/D: 16-pin DIP/NSOP package
Applications
* * * *
Burglar alarm system Smoke and fire alarm system Garage door controllers Car door controllers
* * *
Security system Cordless telephones Other remote control systems
General Description
The HT6P20 is a CMOS LSI encoder designed for remote control system applications. It encodes 24 bits of information and then serially transmits it via the DOUT pin upon receipt of transmission enable (DATA pins: D0~D7) signals. The combination of address and data bits of the HT6P20 is designed using one time programmable process. In addition, the chip offers various packaging for flexible combination of programmable address/data so as to meet various applications. Its programmable address/data is transmitted together with the anti-code bits via RF or infrared transmission medium upon receipt of a trigger signal.
Block Diagram
OSC1 OSC2 VPP S IO A d d re s s C o u n te r
O s c illa to r
P r o g r a m m in g C ir c u it
M ix e r & D r iv e r
DOUT
C o n tr o l U n it
D a ta L a tc h
PGM
D0
D7
Note: Address/Data numbers are available in various combinations, refer to the functional descrip tion.
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HT6P20
Pin Assignment
2 4 -A d d re s s 0 -D a ta 2 2 -A d d re s s 2 -D a ta 2 0 -A d d re s s 4 -D a ta
D1 1 2 3 4 5 6 7 8 D2 D3 VSS PGM 1 8 2 7 3 6 4 5 VSS OSC2 OSC1 S IO VPP VDD DOUT D0 1 8 2 7 3 6 4 5 D1 VSS OSC2 NC VDD DOUT OSC1 NC NC NC NC 16 15 14 13 12 11 10 9 D0 PGM S IO VPP VDD DOUT OSC1 OSC2
H T6P20A 8 D IP /N S O P B la n k d e v ic e
H T6P20B 8 D IP /N S O P B la n k d e v ic e
D1 1 2 3 4 5 6 7 8 D 2 /N C D 3 /N C VSS 16 15 14 13 12 11 10 9 D0 PGM S IO VPP VDD DOUT OSC1 OSC2
H T6P20D 1 6 D IP /N S O P
PGM 1 2 3 4 VSS OSC2 OSC1
8 7 6 5
S IO VPP VDD DOUT
D 4 /N C D 5 /N C D 6 /N C D 7 /N C
H T6P20 8 D IP /N S O P
H T6P20 1 6 D IP /N S O P
Note: The customer code and control code have been programmed into HT6P20A/B/D by Holteks factory process. The blank device HT6P20 is not programmed, it can be programmed by Holteks programming kit. Warning: The 8-pin blank device only allows programming as HT6P20A type. The 16-pin blank device allows programming as one of HT6P20/D type. After programming the HT6P20 pin name are the same as one of HT6P20D, which is determined by the kit programming procedure. Pin name NC stands for no connection (floating).
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HT6P20
Pad Assignment
DOUT VDD VPP 1 S IO PGM D0 NC D1 6 7 D2 8 D3 9 NC 10 VSS 11 NC 12 D4 13 D5 14 D6 15 NC 5 4 3 (0 ,0 ) 18 17 16 OSC1 OSC2 D7 2
Pad Coordinates
Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 X -956.50 -1123.00 -1123.00 -1123.00 -1123.00 -1123.00 -1027.50 -852.50 -530.00 -355.00 -180.00 142.50 317.50 640.00 815.00 1137.50 1118.00 1118.00 489.00 223.50
Unit: mm Y 762.75 498.75 236.25 -86.25 -261.25 -583.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -776.75 -466.75 -205.75 772.05 789.75
20
19
Chip size: 2590 2010 (mm)
2
* The IC substrate should be connected to VSS in the PCB layout artwork.
Pin Description
HT6P20D Pin No. Pin Name I/O 16 1~3 4 5~8 9 10 11 12 13 14 15 D0~D3 VSS NC OSC2 OSC1 DOUT VDD VPP SIO PGM I 3/4 3/4 O I O 3/4 I I/O I Internal Connection CMOS IN Pull-high 3/4 3/4 Description Data input and transmission enable (active low) They can be externally set to VSS or left open. Negative power supply, ground No connection
OSCILLATOR Oscillator output pin OSCILLATOR Oscillator input pin CMOS OUT 3/4 3/4 CMOS IN/OUT CMOS IN Pull-high Data serial transmission output Positive power supply Programming power supply, VDD for normal operation Programming address/control code input and mode code output for mode verification Program mode control pin, active low
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HT6P20
Approximate internal connection circuits
C M O S IN /O U T CMOS OUT
V
C M O S IN P u ll- h ig h
DD
O S C IL L A T O R
OSC1
OSC2
Absolute Maximum Ratings
Supply Voltage ..............................-0.3V to 12V Input Voltage .................VSS-0.3V 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 VIH VIL RPH Parameter Operating Voltage Standby Current Operating Current H Input Voltage L Input Voltage D0~D7 Pull-high Resistance Source IDOUT Output Current Sink fOSC Oscillator Frequency Test Conditions VDD 3/4 12V 12V 3/4 3/4 12V 5V 12V 5V 12V 12V Conditions 3/4 Oscillator stops No load fOSC=3kHz 3/4 3/4 3/4 0.9VDD 0.9VDD 0.1VDD 0.1VDD ROSC=1.4MW Min. 2 3/4 3/4 0.8VDD 0 3/4 -2 -6.5 2 6 3/4 Typ. 3/4 1 200 3/4 3/4 150 -5 -15 5 15 3 Max. 12 2 400 VDD
Ta=25C Unit V mA mA V V kW mA mA mA mA kHz
0.2VDD 300 3/4 3/4 3/4 3/4 3/4
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HT6P20
Functional Description
Programming The HT6P20 is a one time programmable encoding integrated circuit. The programmable codes consist of 4-bit control codes and 24-bit address codes. Before using the device, first program the internal 4 control bits and 24 address bits. Then, to program the address and control codes, connect the PGM pin to VSS, allowing the SIO pin to receive control and address codes from the continuously transmitting programming kit. The control codes (B0~B3) and address timing are respectively shown on the Table and the Figure for Programming Timing. In the programming process, the mode bit (B0) has to be programmed first. The 0/2/4/8 data number is selected by the address along with the data format bits (B1,B2). The HT6P20, in addition, provides a polarity bit (B3) to select the polarity of the output data. Various packages of the HT6P20 offer programmable combinations of address/data to meet various application needs.
B0 B1 B2 B3 P o la r ity c o n tr o l A d d re s s a n d d a ta fo rm a t M o d e c o n tro l
Table 1: Control code
* Mode control (B0)
B0 0 1
Function Not programmed Programmed
* Address and data format (B1,B2)
B2 0 0 1 1
B1 0 1 0 1
Code Format A0~A23 A0~A21 + D1~D0 A0~A19 + D3~D0 A0~A15 + D7~D0
* Polarity control (B3)
B3 0 1
Data Output Polarity Negative polarity Positive polarity
The HT6P20A/D can be programmed by the SIO pins. The HT6P20B, on the other hand, is programmed for 2-data and positive polarity application.
Programming timing of the HT6P20D (B0~B3=1010)
OSC2 (3 k H z )
PGM
S IO 1 P r o g r a m m in g b it C B0 1 B1 0 1 0 B3 A0 1) 2) 3) 4) 5) B2 0 1 A1 B0~ A0~ A20 S IO 0 : "L A2 0 A3 0 1 0 X X X X
A18 A19 A20 A21 A22 A23 lcode ess co fo r d o " H ig h "; X : s
P r o g r a m m in g
N o te : ( ( ( ( (
B 3 a re c o n tro A 2 3 a re a d d r ~ A 2 3 s ta n d s m u s t b e s e t to o w " ; 1 : " H ig h
de n 't "d Do
s c a re fo r th e H T 6 P 2 0 D u r in g C a n d B 0 p e r io d s n 't c a r e
Programming timing for the HT6P20D
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HT6P20
Normal operation The HT6P20 encodes and transmits address/data to a decoder upon receipt of a trigger signal. The address codes of the HT6P20A are always transmitted as long as power (VDD) is supplied. The transmission function of the HT6P20B/D is enabled by the D0~D7 pins (active low). The following is the transmission timing of the HT6P20:
D0~D7 < 1 w o rd E ncoder DOUT > 1 w o rd
Transmission timing A complete code word of the HT6P20D consists of 3 periods as shown below.
fo s c DOUT 1 c lo c k 1 /3 b it p ilo t p e r io d ( 2 3 c lo c k s ) ( A 0 ~ A 1 9 , 6 0 c lo c k s ) a d d r e s s c o d e p e r io d ( D 3 ~ D 0 , 1 2 c lo c k s ) d a ta c o d e p e r io d 0 1 0 1
a n ti- c o d e p e r io d ( 4 b its )
A complete code word for the HT6P20D The HT6P20A/B/D detects the logic state of the internal programmed address and the external data pins, and then transmits the detected information during the code period. Each address/data bit can be set to one of the following two logic states:
fo s c "O ne" "Z e ro " A d d re s s / D a ta b it
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HT6P20
Flowchart
Pow eron
S ta n d b y m o d e
No No T r a n s m is s io n e n a b le d ? Yes A d d re s s /d a ta w o rd s tr a n s m itte d No
PG M =0 ? Yes P r o g r a m m in g m ode
P r o g r a m m in g c o m p le te d ? Yes
No
T r a n s m is s io n s till e n a b le d Yes A d d re s s /d a ta w o rd s tr a n s m itte d c o n tin u o u s ly
N o te : O n e tim e p r o g r a m m a b le
Application Circuits
T r a n s m itte r C ir c u it
T r a n s m itte r C ir c u it 1 2 1 2 3 R osc 4 PGM VSS OSC2 OSC1 S IO VPP VDD DOUT 6 TE 5 LED 8 7 7 8 4 +12V 6 5 3
D1 D2 D3 VSS NC NC NC NC
D0 PGM S IO VPP VDD DOUT OSC1 OSC2 9
16 15 14 13 12 11 10 R osc LED +12V
H T6P20A R o s c @ 1 .4 M W
H T6P20D R o s c @ 1 .4 M W
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HT6P20
T r a n s m itte r C ir c u it
1 2 3 4 5 6 7 8
D1 D2 D3 VSS NC NC NC NC
D0 PGM S IO VPP VDD DOUT OSC1 OSC2 9
16 15 14 13 12 11 10 R osc +12V 100W 0 .1 m F
H T6P20D R o s c @ 1 .4 M W
+12V
100kW T r a n s m itte r C ir c u it 4 .7 k W T r a n s m itte r C ir c u it
1 2 3 4 5 6 7 8
D1 D2 D3 VSS NC NC NC NC
D0 PGM S IO VPP VDD DOUT OSC1 OSC2 9
16 15 14 13 12 11 10 R osc 8 100W 5 LED 7 6 0 .1 m F +12V 4 3 2
1
D1 D2 D3 VSS NC NC NC NC
D0 PGM S IO VPP VDD DOUT OSC1 OSC2 9
16 15 14 13 12 11 10 R osc 100W 0 .1 m F LED
H T6P20D R o s c @ 1 .4 M W
H T6P20D R o s c @ 1 .4 M W
Note: In order to prevent the IC from getting damaged due to the latch up, the 100W resistor or the LED which can also be a transmission indicator is indispensible when VDD=9V~12V.
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HT6P20
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 2000 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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