UTCRCT02

CMOS IC

1

QW-R502-002,C

Encoder For Remote Controller

With Five Functions

DESCRIPTION

The chip can be used with the decoder RCR02 to provide a

complete control functions to the remote-controlled toy. The

RCT02 has five input pins corresponding with the five

function buttons i.e, forward, backward, rightward, leftward

and turbo. The encoding circuit in the RCT02 sends digital

codes to the two output pins SO and SC. The digital codes

correspond to the definite function buttons or their

combinations. The SO and SC outputs are used in wireless

and infra-red applications respectively.

There is an internal oscillator in the RCT02. By adding an

external resistor conveniently, the oscillator will be

constructed. The oscillator frequency can be adjusted by the

external resistor. The relative error between the frequencies

of the two on chip oscillators in the RCT02 and RCR02 must

be less than ±25%.

The auto-power-off function is achieved by an internal

counter. When the RCT02 is powered on, the counter is reset

and begin to count. Any action of push down or release the

function button also reset the counter. The PC pin will keep

on a high level until the counter counts up to about 4 minutes.

The PC output is used to control on/off state of the external

power supply. Pressing OFF button can also shut down the

power supply. Press on any function button will wake up the

chip promptly.

FEATURES

*Five input pins used for five control buttons

*Operating power-supply voltage range: 2.5 to 5.0V

*Auto-power-off if no press on any button in 4 minutes or

continuously press on any button over 4 minues

*Manual-power-on/off with ON/OFF button

*One output pin used for external power control

*Press on any button as wake up

*On-chip oscillator with an external resistor

*Low operating current

*Few external components needed

DIP-14

SOP-14