HT6030 Datasheet, PDF (1/10 Pages) Holtek Semiconductor Inc – 312 Series of Decoders

3¹² Series of Decoders
Features
· Operating voltage: 2.4V~12V
· Low power and high noise immunity CMOS
technology
· Low standby current
· Capable of decoding 12 bits of information
· Pair with Holtek¢s 3¹² series of encoders
· 8~12 address pins
· 0~4 data pins
· Trinary address setting
Applications
· Burglar alarm system
· Smoke and fire alarm system
· Garage door controllers
· Car door controllers
General Description
The 3¹²decoders are a series of CMOS LSIs for
remote control system applications. They are
paired with 3¹²series of encoders. For proper
operation a pair of encoder/decoder with the
same number of address and data format
should be selected (refer to the encoder/decoder
cross reference tables).
The 3¹² series of decoders receive serial address
and data from its corredponding series of
encoders that are transmitted by a carrier us-
ing an RF or an IR transmission medium. Then
it compares the serial input information twice
continuously with its local address. If no errors
· Received data are checked two times
· Built-in oscillator needs only 5% resistor
· VT goes high during a valid transmission
· 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
or unmatched codes are encountered, the input
data codes are decoded and transferred to the
output pins. The VT pin also goes high to indi-
cate a valid transmission.
The 3¹² series of decoders are capable of decod-
ing 12 bits of information that consists of N bits
of address and 12-N bits of data. To meet vari-
ous applications they are arranged to provide a
number of data pins ranging from 0 to 4 and an
address pin ranging from 8 to 12. Thus, various
combinations of address/data number are
available in different packages.
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December 13, 1999