HT602L Datasheet, PDF (1/14 Pages) Holtek Semiconductor Inc – 318 Series of Decoders

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 HOLTEK’s 3}¹⁸ _{series of encoders}
• _{8~18 address pins}
• _{0~8 data pins}
• _{Trinary address setting}
• _{Two times of receiving check}
• _{Built-in oscillator needs only a 5% resistor}
• _{Valid transmission indictor}
• _{Easily interface with an RF or an infrared}
transmission medium
• _{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 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 en-
coder/decoder cross reference tables).
The 3¹⁸ series of decoders receives serial ad-
dress 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 de-
coded 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 applica-
tions 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 3¹⁸ decoders provide various com-
binations of address/data number in different
packages.
Selection Table
Function _Address
Item
No.
Data
No. Type
VT
Oscillator
Trigger
Package
HT602L
12
2
L √ RC oscillator DIN active “Hi” 20 DIP/20 SOP
HT604L
10
4
L √ RC oscillator DIN active “Hi” 20 DIP/20 SOP
HT605L
9
5
L √ RC oscillator DIN active “Hi” 20 DIP/20 SOP
HT611
14
0
— √ RC oscillator DIN active “Hi” 20 DIP/20 SOP
1
2nd Oct ’97