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  Holtek Semiconductor Electronic Components Datasheet  

HT604L Datasheet

318 Series of Decoders

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HT604L pdf
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 Holtek¢s 318 series of encoders
· 9~10 address pins
· 2~8 data pins
· Trinary address setting
Applications
· Burglar alarm system
· Smoke and fire alarm system
· Garage door controllers
· Car door controllers
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 for-
mat should be selected (refer to the encoder/de-
coder 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 se-
rial input data twice continuously with its local
address. If no errors or unmatched codes are
· 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
· Car alarm system
· Security system
· Cordless telephones
· Other remote control systems
encountered, the input data codes are decoded
and then transferred to the output pins. The VT
pin also goes high to indicate a valid transmis-
sion.
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 ad-
dress pin whose range is from 8 to 18. In addi-
tion, the 318 decoders provide various
combinations of address/data number in differ-
ent packages.
1 April 24, 2000


  Holtek Semiconductor Electronic Components Datasheet  

HT604L Datasheet

318 Series of Decoders

No Preview Available !

HT604L pdf
HT604L/614/692
Selection Table
Function Address
Part No.
No.
Data
No. Type
VT
Oscillator
Trigger
Package
HT604L
10 4 L Ö RC oscillator DIN active ²Hi² 20 DIP/SOP
HT614
10 4 M Ö RC oscillator DIN active ²Hi² 20 DIP/SOP
HT692
10 2 M Ö RC oscillator DIN active ²Hi² 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
O SC2 O SC1
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 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
D a ta
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).
2 April 24, 2000


Part Number HT604L
Description 318 Series of Decoders
Maker Holtek Semiconductor Inc
Total Page 9 Pages
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