HT600/HT680/HT6207
318 Series of Encoders
Features
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Operating voltage: 2.4V~12V
Easy interface with an RF or infrared transmission
media
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Low power and high noise immunity CMOS
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technology
Minimal external components
Pair with Holtek¢s 318 series of decoders
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Low standby current
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Three words transmission
HT600/HT6207: 20-pin DIP/SOP package
HT680: 18-pin DIP/SOP package
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Built-in oscillator needs only 5% resistor
Applications
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Burglar alarm system
Car alarm system
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Smoke and fire alarm system
Security system
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Garage door controllers
Cordless telephones
Other remote control systems
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Car door controllers
General Description
The 318 encoders are a series of CMOS LSIs for remote
control system applications. They are capable of encod-
ing 18 bits of information which consists of N address
bits and 18-N data bits. Each address/data input is ex-
ternally trinary programmable if bonded out. It is other-
wise set floating internally. Various packages of the 318
encoders offer flexible combinations of programmable
address/data to meet various application needs. The
programmable address/data is transmitted together
with the header bits via an RF or an infrared transmis-
sion medium upon receipt of a trigger signal. The capa-
bility to select a TE trigger type or a DATA trigger type
further enhances the application flexibility of the 318 se-
ries of encoders.
Selection Table
Function
Address Address/ Data
No.
Dummy
Code No.
Oscillator
Trigger
Package
No.
Data No.
Part No.
HT600
9
8
5
4
0
0
0
4
4
6
4
RC oscillator
RC oscillator
RC oscillator
TE
TE
20DIP/SOP
18DIP/SOP
20DIP/SOP
HT680
HT6207
10
D12~D15
Note: Address/Data represents pins that can be either address or data according to the application requirement.
Rev. 1.10
1
January 24, 2003