DESCRIPTION
The TX7/RX7 are a pair of IC designed for digital proportional radio control system, where TX7 is the transmitter and RX7 is the receiver. The TX7/RX7 provide a 3-channel remote controller for digital remote controlled car application. TX7/RX7 have 3 channels, CH1, CH2 and CH3. CH1 is a digitized control handling forward and backward motions, where 7 steps controlling motor forward speed, and another 7 steps for backward speed.

FEATURES
Transmitter: TX7
    -- Operating voltage :3.6V~5.5V
    -- RC oscillator
    -- 3 input control pins for CH1, CH2, CH3(CH1&CH2 with VR control, CH3 with ON/OFF control)
    -- Typical oscillator frequency: 80kHz

Receiver: RX7
    -- Operating Voltage : 3.6V~5.5V
    -- Proportional channel:
        -- CH1 as forward and backward motor control with 8 steps, 7steps controlling motor speed and 1 step controlling dead band.
        -- CH2 as smooth and accurate steering providing 32 steps to control angles in left and right
    -- Auto power cut-off pin provided to monitor forward and backward motor and whether there is excess operating current. The cut-off voltage can be control by “cutth” pin.
    -- adjustable (by mask option) signal detect threshold voltage to efface noise across
    -- Typical oscillator frequency: 80kHz