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HT16x2Tx/HT12x2Tx

Features

● Operating voltage: 2V ~ 3.6V

● 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

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.