HT16x2Tx/HT12x2Tx
2
16
/2
12
RF Encoder
Features
●
Operating voltage: 2V ~ 3.6V
●
Low standby current: 1µA (typ.) at V
DD
=3V
●
Data trigger function
●
Provides 2 compound Data trigger pins
●
Minimum four transmission words
●
Integrated oscillator – no external resistor
●
Positive polarity data codes
●
Integrated complete UHF transmitter
●
Frequency range 300MHz to 450MHz
●
Support ASK/OOK modulation
●
Output power up to 10dBm
●
Minimal external components
●
20-pin SSOP
Applications
●
Burglar alarm systems
●
Smoke and fire alarm systems
●
Personal alarm system
●
Car/Garage door controllers
●
Home/office/car security systems
●
Cordless telephones
●
Other remote control systems
General Description
The HT16x2Tx/HT12x2Tx are a series of encoders which include a 300M~450MHz ASK
transmitter for remote control system applications. These highly integrated devices are true “switch-
in, antenna-out” monolithic devices. They are capable of encoding information consisting of N
address bits and 16- N data bits. Each address/data input can be set to one of two logic states.
The programmed addresses/data is transmitted together with the header bits via RF upon receipt
of a trigger signal. The capability to select a DATA trigger on the HT16x2Tx/HT12x2Tx further
enhances the application flexibility of the 2
16
series of encoders.
The devices offer high performance in the areas of power delivery and operating temperature.
In terms of power, the devices are capable of delivering +10 dBm into a 50Ω load. This power
level enables a small form factor transmitter such as a key fob transmitter to operate near the
maximum limit of transmission regulations. In terms of temperature, the devices can operate from
-40°C to 85°C with minor frequency drift. When compared with SAW solutions, wider operation
temperatures are obtainable. The also offer exceptional ease of use. It is only necessary to provide a
crystal reference frequency source, which has a frequency equal to the RF carrier frequency divided
by 32, together with a few additional external components to implement a complete and versatile
transmitter. The devices operate using ASK/OOK - Amplitude Shift Keying/On-Off Keyed - UHF
receiver types from wide-band super-regenerative radios to narrow-band, high performance super-
heterodyne receivers.
Rev. 1.00
1
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HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
