HT640 Datasheet, PDF (1/12 Pages) Holtek Semiconductor Inc – 3(18) Series of Encoders

3¹⁸ Series of Encoders
Features
· Operating voltage: 2.4V~12V
· Low power and high noise immunity CMOS
technology
· Low standby current
· Three words transmission
· Built-in oscillator needs only 5% resistor
· Easy interface with an RF or infrared trans-
mission media
· Minimal external components
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 encoders are a series of CMOS LSIs for
remote control system applications. They are
capable of encoding 18 bits of information
which consists of N address bits and 18-N data
bits. Each address/data input is externally
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 ad-
dress/data is transmitted together with the
header bits via an RF or an infrared transmis-
sion medium upon receipt of a trigger signal.
The capability to select a TE trigger type or a
DATA trigger type further enhances the appli-
cation flexibility of the 3¹⁸ series of encoders.
Selection Table
Function
Part No.
HT600
HT640
HT680
HT6187
HT6207
HT6247
Address
No.
9
10
8
9
10
12
Address/
Data No.
5
8
4
0
0
0
Data Dummy
No. Code No.
Oscillator
Trigger
Package
0
4
RC oscillator
TE
20 DIP/20 SOP
0
0
RC oscillator
TE
24 SOP/24 SDIP
0
6
RC oscillator
TE
18 DIP
3
6
RC oscillator D12,D14,D15 18 DIP/20 SOP
4
4
RC oscillator D12~D15 20 DIP/20 SOP
6
0
RC oscillator D12~D17 24 SOP/24 SDIP
Note: Address/Data represents addressable pins or data according to the decoder requirements.
1
July 8, 1999