WIRELESS MADE SIMPLE
Holtek HT640/S Data Sheet
F
FE
EA
AT
TU
UR
RE
ES
S
• 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 HT640 encoder
• 10 address pins
• 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
A
AP
PP
PL
LIIC
CA
AT
TIIO
ON
NS
S
• 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
G
GE
EN
NE
ER
RA
AL
L D
DE
ES
SC
CR
RIIP
PT
TIIO
ON
N
The HT640/S encoder is a CMOS LSI for remote control system applications. It is paired with the
HT658/S decoder. The HT640 encoder is capable of encoding 18 bits of information, which consists
of 10 address bits and 8 data bits. The programmable address / data is transmitted together with the
header bits via an RF or an infrared transmission medium upon receipt of a trigger signal on the TE
line.
N
No
otte
e::
This product is manufactured and supported by Holtek Semiconductor. This data sheet is provided as a courtesy to Linx customers
and is believed to be accurate at the time of publication, however these specifications may change at any time without notice. Linx
Technologies makes no representation as to the accuracy or suitability of this information for any purpose. For more information
please contact Holtek at www.holtek.com.
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