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HT604L/614/692 318 Series of Decoders
Features
* * * * * * * *
Operating voltage: 2.4V~12V Low power and high noise immunity CMOS technology Low standby current Capable of decoding 18 bits of information Pairs with Holteks 318 series of encoders 9~10 address pins 2~8 data pins Trinary address setting
* * * * * *
Two times of receiving check Built-in oscillator needs only a 5% resistor Valid transmission indicator 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 door controllers
* * * *
Car alarm system Security system Cordless telephones Other remote control systems
General Description
The 318 decoders are a series of CMOS LSIs for remote control system applications. They are paired with the 318 series of encoders. For proper operation, a pair of encoder/decoder pair with the same number of address and data format should be selected (refer to the encoder/decoder cross reference tables). The 318 series of decoders receive serial address and data from that series of encoders that are transmitted by a carrier using an RF or an IR transmission medium. It then compares the serial input data twice continuously with its local address. If no errors or unmatched codes are encountered, the input data codes are decoded and then transferred to the output pins. The VT pin also goes high to indicate a valid transmission. The 318 decoders are capable of decoding 18 bits of information that consists of N bits of address and 18-N bits of data. To meet various applications they are arranged to provide a number of data pins whose range is from 0 to 8 and an address pin whose range is from 8 to 18. In addition, the 3 1 8 decoders provide various combinations of address/data number in different packages.
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Selection Table
Function Address Data VT No. Part No. No. Type HT604L HT614 HT692 10 10 10 4 4 2 L M M O O O Oscillator RC oscillator RC oscillator RC oscillator Trigger Package
DIN active Hi 20 DIP/SOP DIN active Hi 20 DIP/SOP DIN active Hi 18 DIP
Note: Data type: M stands for momentary type data output. L stands for latch type data output. VT can be used as a momentary data output.
Block Diagram
OSC2 OSC1
O s c illa to r
D iv id e r
D a ta S h ift R e g is te r
L a tc h C ir c u it
D a ta
D IN
B u ffe r
D a ta D e te c to r
S y n c . D e te c to r
C o m p a ra to r
C o m p a ra to r
C o n tr o l L o g ic
T r a n s m is s io n G a te C ir c u it
B u ffe r
VT
A d d re s s
VDD
VSS
Note: The address/data pins are available in various combinations (refer to the address/data table).
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Pin Assignment
Latch series Momentary series
1 0 -A d d re s s 4 -D a ta
20 2 3 4 5 6 7 8 9 10 19 18 17 16 15 14 13 12 11 VDD A9 A8 A7 A6 A4 A3 A2 A1 A0
A11 1 2 3 4 5 6 7 8 9 10 D12 D13 D14 D15 VT D IN OSC2 OSC1 VSS 20 19 18 17 16 15 14 13 12 11 VDD A9 A8 A7 A6 A4 A3 A2 A1 A0 A11 A12 D14 D15 4 5 6 7 8 9 VT D IN OSC2 OSC1 VSS 3 2 1 18 17 16 15 14 13 12 11 10 VDD A9 A8 A7 A6 A3 A2 A1 A0
1 0 -A d d re s s 4 -D a ta
A11 D12 D13 D14 D15 VT D IN OSC2 OSC1 VSS 1
1 0 -A d d re s s 2 -D a ta
HT604L 2 0 D IP /S O P
H T614 2 0 D IP /S O P
H T692 1 8 D IP
Pin Description
Pin Name A0~A12 D10~D17 DIN VT OSC1 OSC2 VSS VDD I/O I O I O I O 3/4 3/4 Internal Connection Description
TRANSMISSION Input pins for address A0~A12 setting GATE They can be externally set to VDD, VSS or left open. CMOS OUT CMOS IN CMOS OUT OSCILLATOR OSCILLATOR 3/4 3/4 Output data pins Serial data input pin Valid transmission, active high Oscillator input pin Oscillator output pin Negative power supply, ground Positive power supply
Approximate internal connections
T R A N S M IS S IO N GATE CMOS OUT C M O S IN
EN OSC1
O S C IL L A T O R
OSC2
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Absolute Maximum Ratings
Supply Voltage...............................-0.3V to 13V 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 Parameter Operating Voltage Standby Current Operating Current Data Output Source Current (D10~D17) Data Output Sink Current (D10~D17) VT Output Source Current VT Output Sink Current H Input Voltage L Input Voltage Oscillator Frequency Test Conditions VDD 3/4 5V 12V 5V Conditions 3/4 Oscillator stops No load fOSC=100kHz VOH=4.5V 5V VOL=0.5V 5V 5V 5V VOH=4.5V VOL=0.5V 3/4 3/4 0.5 -2 1 3.5 0 3/4 1 -4 2 3/4 3/4 100 3/4 3/4 3/4 5 1 3/4 Min. 3 3/4 3/4 3/4 -0.5 Typ. 3/4 0.1 2 0.2 -1
Ta=25C Max. Unit 12 1 4 1 3/4 V mA mA mA mA mA mA mA V V kHz
IO
IVT VIH VIL fOSC
10V ROSC=330kW
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Functional Description
Operation The 3 series of decoders provide various combinations of address and data pins in different packages. It is paired with the 318 series of encoders. The decoders receive data transmitted by the encoders and interpret the first N bits of the code period as address and the last 18-N bits as data (where N is the address code number). A signal on the DIN pin then activates the oscillator which in turns decodes the incoming address and data. The decoders will check the received address twice continuously. If all the received address codes match the contents of the decoders local address, the 18-N bits of data are decoded to activate the output pins, and the VT pin is set high to indicate a valid transmission. That will last until the address code is incorrect or no signal has been received. The output of the VT pin is high only when the transmission is valid. Otherwise it is always low. Output type There are two types of output to select from:
* Momentary type
18
Flowchart
Pow eron
S ta n d b y m o d e D is a b le V T & ig n o r e th e r e s t o f th is w o r d
No
C o d e in ? Yes A d d r e s s b its m a tc h e d ? Yes S to re d a ta No
M a tc h p r e v io u s s to r e d d a ta ? Yes No 2 tim e s o f c h e c k in g c o m p le te d ? Yes L a tc h /M o m e n ta ry d a ta to o u tp u t & a c tiv a te V T No
No
The data outputs follow the encoder during a valid transmission and then reset.
* Latch type
The data outputs follow the encoder during a valid transmission, and are then latched in this state until the next valid transmission occurs.
A d d re s s o r d a ta e rro r ? Yes
Note: The oscillator is disabled in the standby state and activated as long as a logic high signal is applied to the DIN pin. i.e., the DIN should be kept low if there is no signal input.
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Decoder timing
E ncoder T r a n s m is s io n E n a b le E ncoder D a ta O u t 3 w o rd s D ecoderV T 2 w o rd s check M o m e n ta ry D a ta O u t 1 /2 c lo c k p e r io d L a tc h e d D a ta O u t 1 /2 c lo c k p e r io d 2
14
< 1 w o rd
T r a n s m itte d C o n tin u o u s ly c lo c k s check
3 w o rd s 2
14
c lo c k s
Encoder/Decoder selection tables
* Latch type of data output
Part No.
Data Address VT Pins Pins
Package Pair Encoder HT600 HT6207 20 20 Encoder DIP SOP SKDIP DIP 20 3/4 3/4 20 Decoder SOP SKDIP 20 3/4
HT604L
4
10
O
* Momentary type of data output
Part No. HT692 HT614
Data Pins 2 4
Address Pins 10 10
Package VT O O Pair Encoder HT680 HT600 HT6207 18 20 20 Encoder DIP SOP SKDIP DIP 3/4 20 3/4 3/4 3/4 18 20 Decoder SOP SKDIP 3/4 20 3/4 3/4
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Address/Data sequence The following provides a table of address/data sequence for various models of the 318 series decoders. A correct device should be selected according to the sindividual address and data requirements. Part No. HT604L HT614 HT692 Address/Data Bits 0~3 A0~A3 A0~A3 A0~A3 4 A4 A4 3/4 5 3/4 3/4 3/4 6~9 A6~A9 A6~A9 A6~A9 10 3/4 3/4 3/4 11 A11 A11 A11 12 D12 D12 A12 13 D13 D13 3/4 14 D14 D14 D14 15 D15 D15 D15 16 3/4 3/4 3/4 17 3/4 3/4 3/4
Note: 3/4 is a dummy code which is left open and not bonded out. Oscillator frequency vs supply voltage
fo s c (S c a le ) 3 .0 0 2 .7 5 2 .5 0 2 .2 5 2 .0 0 1 .7 5 1 .5 0 1 .2 5 (1 0 0 k H z ) 1 .0 0 0 .7 5 0 .5 0 0 .2 5 2 3 4 5 6 7 8 9 10 11 150k 180k 220k 270k 330k 390k 470k 560k 680k 820k 1M 1 .5 M 2M 1 2 1 2 .5 V
DD
R o s c (9 )
120k
(V D C )
The recommended oscillator frequency is fOSCD (decoder) @ fOSCE (encoder)
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Application Circuits
R e c e iv e r C ir c u it V
DD
R e c e iv e r C ir c u it V
DD
1 2 3 4 5 6 7 R osc 8 9
A11 A12 D14 D15 VT D IN OSC2 OSC1 VSS
VDD A9 A8 A7 A6 A3 A2 A1 A0
18 17 16 15 14 13 12 11 10 8 R osc 9 7 5 6 4 3 2
1
A11 D12 D13 D14 D15 VT D IN OSC2 OSC1 VSS
VDD A9 A8 A7 A6 A4 A3 A2 A1 A0
20 19 18 17 16 15 14 13 12 11
10
H T692
H T 6 1 4 /H T 6 0 4 L
Note: Typical infrared receiver: PIC-12043T/PIC-12043C (KODENSHI CORP.) or LTM9052 (LITEON CORP.) Typical RF receiver: JR-200 (JUWA CORP.) RE-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 a 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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