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Figure of the remote control transmitter IC TC9148P

2016-04-03 01:47  
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Figure of the remote control transmitter IC TC9148P
The TC9148P is one kind of remote control remote control transmitter IC that can be used with the microprocessor TC915OP, and this device can be use in variety of sound systems. 1. Pin functions of TC9148P The TC9148P manifold circuit is composed of the clock oscillator circuit, the key instruction decoding and encoding circuit, the light driver circuit, remote control transmitter drive circuit.etc. The pin functions and pin arrangement of the TC9148P is as shown in figure 1, the operating voltage is as shown in table 1. Figure 1. The pin functions and pin arrangement of the TC9148P Table 1. Theoperatingvoltage of TC9148P 2.TC9148P typical application circuit The TC9148P manifold's typical application circuit is as shown in figure 2. Figure 2. The TC9148P manifold's typical application circuit 3.Circuit process VTQ701 and VTQ702 is the output drive circuit of infrared light-emitting diode; LD701, LD702 are the infrared light-emitting diodes; the power supply back circuit is composed of the C702, R701, C701: X701 is the remote control transmitter crystal clock oscillator, the clock oscillation circuit is composed of this oscillator, the C703, C704 and the circuit in pin-2 & pin-3 of TC9148P; VTQ703 is the LED driver output tube of VTQ703. 4.Fault tips