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The BH1415S/F are FM stereo transmitter ICs that transmit simple configuration. The ICs consist of a stereo modulator for generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator. The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal.
BH1415F Maximum Ratings
Parameter
Symbol
Limits
Unit
Conditions
Supply voltage
Vcc
+7.0
V
Pin8,12
Data input voltage
VIN-D
−0.3~Vcc+0.3
V
Pin15,16,17,18
Phase comparator output voltage
VOUT-P
−0.3~Vcc+0.3
V
Pin7
Power dissipation
BH1415S
Pd
1000 *1
mW
BH1415F
450*2
Storage temperature
Tstg
−55~+125
*1 Derating : 10mW/ for operation above Ta=25. *2 Derating : 4.5mW/ for operation above Ta=25.
BH1415F Features
1) It is possible to improve the timbre because it has the pre-emphasis circuit, limiter circuit, and the low-pass filter circuit. 2) Built-in pilot-tone system FM stereo modulator circuit. 3) The transmission frequency is stable because it has a PLL system FM transmitter circuit. 4) PLL data input (CE, CK, DA) by serial input.
BH1415F Typical Application
CD changer, Car TV, Car navigation, Wireless speakers, Personal computer (sound board), Game machine