产品名称：无线遥控收发器

产品型号：HT8A978

产品描述：

The HT8A977B and HT8A978B provide

complete control functions to the

remote-controlled toy. The HT8A977B has five

input pins corresponding with the five function

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

and turbo. The encoding circuit in the HT8A977B

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.

The HT8A978B has five output pins

corresponding with the five actions. The received

signals are amplified by the three-stage amplifier,

and then the appropriate amplified signals are

sampled, fault-tolerantly checked and decoded to

control the actions of the remote-controlled toy.

There is an internal oscillator in the

HT8A977B and 978B respectively. 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 HT8A977B and HT8A978B

must be less than ±25%.

The auto-power-off function is achieved by

an internal counter (977B). The PC output is used

to control on/off state of the external power supply.

Press on any function button will wake up the chip

promptly.

参数：

工作电压：2.5~5V

功能：接收

静态电流：1uA

工作电流：10uA

振荡频率：128KHz

温度范围：-25~85 C

封装：SOP16 DIP16